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"count": 257419,
"next": "https://hermes.lco.global/api/v0/messages/?format=api&limit=100&offset=200&ordering=topic",
"previous": "https://hermes.lco.global/api/v0/messages/?format=api&limit=100&ordering=topic",
"results": [
{
"id": 124,
"topic": "gcn.circular",
"uuid": "5f441ece-3cc6-4a88-a180-fa98e51b9ea9",
"title": "GRB 230525A: CALET Gamma-Ray Burst Monitor detection",
"submitter": "Hop gcn.circular",
"authors": "Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>",
"data": {
"date": "23/05/31 06:20:08 GMT",
"from": "Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>",
"title": "GCN CIRCULAR",
"number": "33901",
"subject": "GRB 230525A: CALET Gamma-Ray Burst Monitor detection"
},
"message_text": "Y. Kawakubo (LSU), A. Yoshida, T. Sakamoto, S. Sugita (AGU),\nK. Yamaoka (Nagoya U), S. Nakahira (RIKEN), Y. Asaoka (ICRR),\nS. Torii, Y. Akaike, K. Kobayashi (Waseda U),\nY. Shimizu, T. Tamura (Kanagawa U), N. Cannady (GSFC/UMBC),\nM. L. Cherry (LSU), S. Ricciarini (U of Florence),\nP. S. Marrocchesi (U of Siena),\nand the CALET collaboration:\n\nThe short GRB 230525A (Fermi-GBM Final Localization: The\nFermi GBM team, GCN Circ. 33877; Fermi-GBM detection: The Fermi\nGBM team, GCN Circ. 33879) was detected in the ground analysis of\nthe CALET Gamma-ray Burst Monitor (CGBM) data around\n10:46:08.33 UTC on 25 May 2023 (referenced to GCN Circ 33879).\nThe burst signal was seen by all CGBM detectors.\n\nThe burst light curve shows a short pulse around the reference time.\nWe are not able to obtain the duration because no event data is available\nfor ground-detected events.\n\nThe ground-processed light curve is available at\nhttp://cgbm.calet.jp/cgbm_trigger/ground/1369046781/\n\nThe CALET data used in this analysis are provided by\nthe Waseda CALET Operation Center located at Waseda University.\n\n",
"published": "2023-05-31T06:20:16.889562Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-31T06:20:16.889666Z",
"modified": "2023-05-31T06:20:16.902033Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 125,
"topic": "gcn.circular",
"uuid": "c428eeaf-c276-4a36-abc9-b7eebb095a80",
"title": "LIGO/Virgo S230531f: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/05/31 06:24:44 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33902",
"subject": "LIGO/Virgo S230531f: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230531f errorbox 18909 sec after notice time and 19920 sec after trigger time at 2023-05-31 05:53:25 UT, with upper limit up to 17.4 mag. The observations began at zenith distance = 47 deg. The sun altitude is -69.7 deg.\n\nThe galactic latitude b = 21 deg., longitude l = 158 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011920\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 20010 | 2023-05-31 05:53:25 | MASTER-OAFA | (21h 47m 17.84s , -50d 05m 55.5s) | C | 180 | 17.4 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-05-31T06:24:49.565820Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-31T06:24:49.565842Z",
"modified": "2023-05-31T06:24:49.571057Z",
"nonlocalizedevents": [
{
"event_id": "S230531f"
}
],
"targets": []
},
{
"id": 130,
"topic": "gcn.circular",
"uuid": "78699e81-1c9e-4df7-859e-5a9340b2a644",
"title": "LIGO/Virgo/KAGRA S230601bf: Identification of a GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "S. P. Stevenson at Swinburne University of Technology <simon.stevenson@ligo.org>",
"data": {
"date": "23/06/01 23:28:00 GMT",
"from": "S. P. Stevenson at Swinburne University of Technology <simon.stevenson@ligo.org>",
"title": "GCN CIRCULAR",
"number": "33903",
"subject": "LIGO/Virgo/KAGRA S230601bf: Identification of a GW compact binary merger candidate"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the\nKAGRA Collaboration report:\n\nWe identified the compact binary merger candidate S230601bf during\nreal-time processing of data from LIGO Hanford Observatory (H1) and\nLIGO Livingston Observatory (L1) at 2023-06-01 22:41:34.101 UTC (GPS\ntime: 1369694512.101). The candidate was found by the CWB [1], MBTA\n[2], GstLAL [3], oLIB [4], PyCBC Live [5], and SPIIR [6] analysis\npipelines.\n\nS230601bf is an event of interest because its false alarm rate, as\nestimated by the online analysis, is 1.7e-15 Hz, or about one in 1e7\nyears. The event's properties can be found at this URL:\n\nhttps://gracedb.ligo.org/superevents/S230601bf\n\nThe classification of the GW signal, in order of descending\nprobability, is BBH (>99%), Terrestrial (<1%), BNS (<1%), or NSBH\n(<1%).\n\nAssuming the candidate is astrophysical in origin, the probability\nthat the lighter compact object is consistent with a neutron star mass\n(HasNS) is <1%. [7] Using the masses and spins inferred from the\nsignal, the probability of matter outside the final compact object\n(HasRemnant) is <1%. [7] Both HasNS and HasRemnant consider the\nsupport of several neutron star equations of state. The probability\nthat any one of the binary components lie between 3 to 5 solar mass\n(HasMassgap) is <1%.\n\nTwo sky maps are available at this time and can be retrieved from the\nGraceDB event page:\n * bayestar.multiorder.fits,0, an initial localization generated by\nBAYESTAR [8], distributed via GCN notice about 31 seconds after the\ncandidate event time.\n * bayestar.multiorder.fits,1, an initial localization generated by\nBAYESTAR [8], distributed via GCN notice about 5 minutes after the\ncandidate event time.\n\nThe preferred sky map at this time is bayestar.multiorder.fits,1. For\nthe bayestar.multiorder.fits,1 sky map, the 90% credible region is\n2109 deg2. Marginalized over the whole sky, the a posteriori\nluminosity distance estimate is 3578 +/- 998 Mpc (a posteriori mean\n+/- standard deviation).\n\nFor further information about analysis methodology and the contents of\nthis alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide\n<https://emfollow.docs.ligo.org/userguide/>.\n\n [1] Klimenko et al. PRD 93, 042004 (2016)\n [2] Aubin et al. CQG 38, 095004 (2021)\n [3] Tsukada et al. arXiv:2305.06286 (2023) and Ewing et al. arXiv:2305.05625 (2023)\n [4] Lynch et al. PRD 95, 104046 (2017)\n [5] Dal Canton et al. ApJ 923, 254 (2021)\n [6] Chu et al. PRD 105, 024023 (2022)\n [7] Chatterjee et al. The Astrophysical Journal 896, 54 (2020)\n [8] Singer & Price PRD 93, 024013 (2016)\n\n",
"published": "2023-06-01T23:28:13.323557Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-01T23:28:13.323577Z",
"modified": "2023-06-01T23:28:13.328720Z",
"nonlocalizedevents": [
{
"event_id": "S230601b"
}
],
"targets": []
},
{
"id": 131,
"topic": "gcn.circular",
"uuid": "7f4deff2-a564-429f-9e22-eee2905fe8e4",
"title": "LIGO/Virgo S230601bf: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/02 13:46:39 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33904",
"subject": "LIGO/Virgo S230601bf: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the LIGO/Virgo S230601bf errorbox 86 sec after trigger time at 2023-06-01 22:43:00 UT, with upper limit up to 19.5 mag. The observations began at zenith distance = 45 deg. The sun altitude is -80.0 deg.\n\nMASTER-OAFA robotic telescope located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230601bf errorbox 543 sec after trigger time at 2023-06-01 22:50:37 UT, with upper limit up to 16.9 mag. Observations started at twilight. The observations began at zenith distance = 73 deg. The sun altitude is -14.9 deg.\n\nThe galactic latitude b = 19 deg., longitude l = 197 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011922\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 92 | 2023-06-01 22:43:00 | MASTER-SAAO | (20h 25m 56.59s , -39d 52m 05.8s) | C | 10 | 17.2 |\n 117 | 2023-06-01 22:43:00 | MASTER-SAAO | (20h 25m 56.59s , -39d 52m 05.8s) | C | 60 | 18.4 | Coadd\n 92 | 2023-06-01 22:43:00 | MASTER-SAAO | (20h 24m 51.97s , -39d 51m 33.9s) | C | 10 | 17.3 |\n 117 | 2023-06-01 22:43:00 | MASTER-SAAO | (20h 24m 51.97s , -39d 51m 33.9s) | C | 60 | 18.4 | Coadd\n 126 | 2023-06-01 22:43:29 | MASTER-SAAO | (20h 26m 02.38s , -39d 51m 46.0s) | C | 20 | 17.7 |\n 126 | 2023-06-01 22:43:29 | MASTER-SAAO | (20h 24m 57.73s , -39d 51m 14.1s) | C | 20 | 17.7 |\n 182 | 2023-06-01 22:44:20 | MASTER-SAAO | (20h 25m 59.84s , -39d 50m 18.5s) | C | 30 | 17.9 |\n 182 | 2023-06-01 22:44:20 | MASTER-SAAO | (20h 24m 55.25s , -39d 49m 46.7s) | C | 30 | 18.0 |\n 236 | 2023-06-01 22:45:10 | MASTER-SAAO | (20h 25m 59.76s , -39d 51m 50.8s) | C | 40 | 18.1 |\n 296 | 2023-06-01 22:45:10 | MASTER-SAAO | (20h 25m 59.76s , -39d 51m 50.8s) | C | 160 | 19.0 | Coadd\n 236 | 2023-06-01 22:45:10 | MASTER-SAAO | (20h 24m 55.12s , -39d 51m 18.1s) | C | 40 | 18.2 |\n 296 | 2023-06-01 22:45:10 | MASTER-SAAO | (20h 24m 55.12s , -39d 51m 18.2s) | C | 160 | 19.1 | Coadd\n 301 | 2023-06-01 22:46:09 | MASTER-SAAO | (20h 26m 02.28s , -39d 50m 14.3s) | C | 50 | 18.1 |\n 301 | 2023-06-01 22:46:09 | MASTER-SAAO | (20h 24m 57.64s , -39d 49m 42.0s) | C | 50 | 18.3 |\n 392 | 2023-06-01 22:47:30 | MASTER-SAAO | (20h 25m 57.11s , -39d 51m 06.3s) | C | 70 | 18.4 |\n 392 | 2023-06-01 22:47:30 | MASTER-SAAO | (20h 24m 52.44s , -39d 50m 32.7s) | C | 70 | 18.5 |\n 503 | 2023-06-01 22:49:11 | MASTER-SAAO | (20h 24m 51.59s , -39d 49m 33.4s) | C | 90 | 18.7 |\n 503 | 2023-06-01 22:49:11 | MASTER-SAAO | (20h 25m 56.26s , -39d 50m 07.1s) | C | 90 | 18.6 |\n 628 | 2023-06-01 22:49:11 | MASTER-SAAO | (20h 24m 51.59s , -39d 49m 33.3s) | C | 340 | 19.4 | Coadd\n 628 | 2023-06-01 22:49:11 | MASTER-SAAO | (20h 25m 56.26s , -39d 50m 07.0s) | C | 340 | 19.5 | Coadd\n 598 | 2023-06-01 22:50:37 | MASTER-OAFA | (07h 28m 41.32s , +23d 12m 59.6s) | C | 110 | 16.2 |\n 748 | 2023-06-01 22:50:37 | MASTER-OAFA | (07h 28m 41.33s , +23d 12m 59.5s) | C | 410 | 16.9 | Coadd\n 623 | 2023-06-01 22:51:01 | MASTER-SAAO | (20h 26m 02.23s , -39d 51m 08.2s) | C | 110 | 18.6 |\n 623 | 2023-06-01 22:51:01 | MASTER-SAAO | (20h 24m 57.50s , -39d 50m 33.1s) | C | 110 | 18.7 |\n 750 | 2023-06-01 22:52:58 | MASTER-OAFA | (07h 28m 46.73s , +23d 13m 32.6s) | C | 130 | 16.1 |\n 779 | 2023-06-01 22:53:23 | MASTER-SAAO | (20h 25m 55.86s , -39d 52m 09.6s) | C | 140 | 18.7 |\n 779 | 2023-06-01 22:53:23 | MASTER-SAAO | (20h 24m 51.07s , -39d 51m 33.1s) | C | 140 | 18.8 |\n 931 | 2023-06-01 22:55:39 | MASTER-OAFA | (07h 28m 44.45s , +23d 14m 48.4s) | C | 170 | 16.6 |\n 1138 | 2023-06-01 22:59:01 | MASTER-OAFA | (07h 28m 44.40s , +23d 13m 39.6s) | C | 180 | 16.5 |\n 2232 | 2023-06-01 23:17:15 | MASTER-OAFA | (07h 28m 43.73s , +23d 14m 28.1s) | C | 180 | 15.8 |\n 2443 | 2023-06-01 23:20:46 | MASTER-OAFA | (07h 28m 43.70s , +23d 13m 13.2s) | C | 180 | 16.0 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-02T13:46:46.991458Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-02T13:46:46.991480Z",
"modified": "2023-06-02T13:46:46.998868Z",
"nonlocalizedevents": [
{
"event_id": "S230601b"
}
],
"targets": []
},
{
"id": 1586,
"topic": "gcn.circular",
"uuid": "bb36ced7-5b09-4a42-8b11-d0a15eeeda4d",
"title": "Fermi-LAT gamma-ray observations of IceCube-230724A",
"submitter": "Hop gcn.circular",
"authors": "Simone Garrappa at DESY <simone.garrappa@desy.de>",
"data": {
"date": "23/07/28 00:08:28 GMT",
"from": "Simone Garrappa at DESY <simone.garrappa@desy.de>",
"title": "GCN CIRCULAR",
"number": "34278",
"subject": "Fermi-LAT gamma-ray observations of IceCube-230724A"
},
"message_text": "C. Bartolini (INFN Bari), S. Garrappa (Weizmann Institute of Science), S. Buson (Uni Wuerzburg) and J. Sinapius (DESY) on behalf of the Fermi-LAT collaboration:\n\nWe report an analysis of observations of the vicinity of the IC230724A high-energy neutrino event (GCN 34265) with all-sky survey data from the Large Area Telescope (LAT), on board the Fermi Gamma-ray Space Telescope. The IceCube event was detected on 2023-07-24 at 01:49:13.38 UT (T0) with J2000 position RA = 32.52 (+0.58, -0.40) deg, Decl. = -1.87 (+0.23, -0.33) deg (90% PSF containment). There are no Fermi 4FGL-DR3 cataloged gamma-ray (>100 MeV; The Fermi-LAT collaboration 2022, ApJS, 260, 53) sources in the 90% IC230724A uncertainty localization region.\n\nWe searched for intermediate (days to years) timescale emission from a new gamma-ray source. Preliminary analysis indicates no significant (> 5 sigma) new excess emission (> 100 MeV) at the IC230724A best-fit position. Assuming a power-law spectrum (photon index = 2.0 fixed) for a point source at the IC230724A best-fit position, the >100 MeV flux upper limit (95% confidence) is < 7.0e-10 ph cm^-2 s^-1 for ~15-years (2008-08-04 to 2023-07-24 UTC), and < 5.8e-9 (< 1.1e-7) ph cm^-2 s^-1 for a 1-month (1-day) integration time before T0.\n\n\nSince Fermi normally operates in an all-sky scanning mode, regular monitoring of this region will continue. For these observations the Fermi-LAT contact persons are C. Bartolini (chiara.bartolini at ba.infn.it), S. Garrappa (simone.garrappa at weizmann.ac.il), S. Buson (sara.buson at uni-wuerzburg.de) and J. Sinapius (jonas.sinapius at desy.de).\n\nThe Fermi-LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden.\n\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkwNTAyOTE0LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.A7Wb_uir5cBvQDJG9kYtWBCZbcD_gTHcVXDodwk4S8M\n\n",
"published": "2023-07-28T00:08:39.913717Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-28T00:08:39.913745Z",
"modified": "2023-07-28T00:08:39.923570Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 137,
"topic": "gcn.circular",
"uuid": "8af4a663-f9f6-4bcb-9a28-35a15120f9f4",
"title": "LIGO/Virgo/KAGRA S230518h: Upper limits from a two-week IceCube neutrino search",
"submitter": "Hop gcn.circular",
"authors": "Jessie Thwaites at IceCube/U Wisc-Madison <thwaites@wisc.edu>",
"data": {
"date": "23/06/02 22:04:10 GMT",
"from": "Jessie Thwaites at IceCube/U Wisc-Madison <thwaites@wisc.edu>",
"title": "GCN CIRCULAR",
"number": "33907",
"subject": "LIGO/Virgo/KAGRA S230518h: Upper limits from a two-week IceCube neutrino search"
},
"message_text": "IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nIceCube has performed an additional search [1] for track-like muon neutrino events consistent with the sky localization of gravitational-wave candidate S230518h in a time range of -0.1 day, +14 days from the alert event time (2023-05-18 10:35:08.016 UTC to 2023-06-01 12:59:08.016 UTC).\n\nDuring this time period IceCube was collecting good quality data. In this case, we report a p-value of 0.73, consistent with no significant excess of track events. IceCube's sensitivity assuming an E^-2 spectrum (E^2 dN/dE) to neutrino point sources within the locations spanned by the 90% spatial containment of the 4-Update map ranges from 0.028 to 1.219 GeV cm^-2 in this time window.\n\nThe IceCube Neutrino Observatory is a cubic-kilometer neutrino detector operating at the geographic South Pole, Antarctica. The IceCube realtime alert point of contact can be reached at roc@icecube.wisc.edu.\n\n[1] Abbasi et al. Astrophys.J. 944 (2023) 1, 80\n\n",
"published": "2023-06-02T22:04:19.088698Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-02T22:04:19.088717Z",
"modified": "2023-06-02T22:04:19.095801Z",
"nonlocalizedevents": [
{
"event_id": "S230518h"
}
],
"targets": []
},
{
"id": 141,
"topic": "gcn.circular",
"uuid": "d6ee79ce-b9c1-4644-a74e-07d6496cc13c",
"title": "LIGO/Virgo S230602ap: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/03 07:48:43 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33908",
"subject": "LIGO/Virgo S230602ap: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230602ap errorbox 46171 sec after notice time and 46590 sec after trigger time at 2023-06-03 07:36:46 UT, with upper limit up to 16.3 mag. The observations began at zenith distance = 80 deg. The sun altitude is -48.2 deg.\n\nThe galactic latitude b = -1 deg., longitude l = 120 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011926\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 46601 | 2023-06-03 07:36:46 | MASTER-OAFA | (17h 16m 22.77s , +41d 22m 00.9s) | C | 20 | 15.9 |\n 46657 | 2023-06-03 07:37:38 | MASTER-OAFA | (17h 16m 20.68s , +41d 23m 37.1s) | C | 30 | 16.0 |\n 46723 | 2023-06-03 07:38:39 | MASTER-OAFA | (17h 16m 20.54s , +41d 22m 11.6s) | C | 40 | 16.3 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-03T07:48:52.441658Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-03T07:48:52.441678Z",
"modified": "2023-06-03T07:48:52.446620Z",
"nonlocalizedevents": [
{
"event_id": "S230602a"
}
],
"targets": []
},
{
"id": 142,
"topic": "gcn.circular",
"uuid": "2dd684f0-ac7e-44df-b552-f1d92fb12305",
"title": "LIGO/Virgo S230603aa: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/03 07:48:51 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33909",
"subject": "LIGO/Virgo S230603aa: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230603aa errorbox 52 sec after notice time and 121 sec after trigger time at 2023-06-03 07:36:46 UT, with upper limit up to 16.3 mag. The observations began at zenith distance = 80 deg. The sun altitude is -48.2 deg.\n\nThe galactic latitude b = 34 deg., longitude l = 66 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011930\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 132 | 2023-06-03 07:36:46 | MASTER-OAFA | (17h 16m 22.77s , +41d 22m 00.9s) | C | 20 | 15.9 |\n 188 | 2023-06-03 07:37:38 | MASTER-OAFA | (17h 16m 20.68s , +41d 23m 37.1s) | C | 30 | 16.0 |\n 254 | 2023-06-03 07:38:39 | MASTER-OAFA | (17h 16m 20.54s , +41d 22m 11.6s) | C | 40 | 16.3 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-03T07:48:54.487587Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-03T07:48:54.487625Z",
"modified": "2023-06-03T07:48:54.492959Z",
"nonlocalizedevents": [
{
"event_id": "S230603a"
}
],
"targets": []
},
{
"id": 152,
"topic": "gcn.circular",
"uuid": "9cc32aa9-5b5f-4472-b154-dfe09daf1090",
"title": "LIGO/Virgo S230605o: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/05 07:02:58 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33913",
"subject": "LIGO/Virgo S230605o: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230605o errorbox 14 sec after notice time and 68 sec after trigger time at 2023-06-05 06:54:51 UT, with upper limit up to 16.3 mag. The observations began at zenith distance = 36 deg. The sun altitude is -57.4 deg.\n\nThe galactic latitude b = 4 deg., longitude l = 21 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011938\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 74 | 2023-06-05 06:54:51 | MASTER-OAFA | (18h 18m 29.39s , +02d 17m 58.6s) | C | 10 | 16.3 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-05T07:03:09.547997Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-05T07:03:09.548026Z",
"modified": "2023-06-05T07:03:09.553681Z",
"nonlocalizedevents": [
{
"event_id": "S230605o"
}
],
"targets": []
},
{
"id": 143,
"topic": "gcn.circular",
"uuid": "7385beb9-6630-4fb8-9386-290c86c52b6a",
"title": "GRB 230603A: Fermi GBM Final Real-time Localization",
"submitter": "Hop gcn.circular",
"authors": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"data": {
"date": "23/06/03 12:45:56 GMT",
"from": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"title": "GCN CIRCULAR",
"number": "33910",
"subject": "GRB 230603A: Fermi GBM Final Real-time Localization"
},
"message_text": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 12:35:29 UT on 3 Jun 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230603A (trigger 707488534.44648 / 230603525).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 294.5, Dec = -11.6 (J2000 degrees, equivalent to J2000 19h 37m, -11d 35'), with a statistical uncertainty of 3.6 degrees.\n\nThe angle from the Fermi LAT boresight is 38.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230603525/quicklook/glg_skymap_all_bn230603525.png\n\nThe HEALPix FITS file, including the estimated localization systematic, can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230603525/quicklook/glg_healpix_all_bn230603525.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230603525/quicklook/glg_lc_medres34_bn230603525.gif\n\n",
"published": "2023-06-03T12:46:05.131264Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-03T12:46:05.131285Z",
"modified": "2023-06-03T12:46:05.137358Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 144,
"topic": "gcn.circular",
"uuid": "8a742f8b-b669-45cc-9b66-aee3021ae277",
"title": "IceCube-230603A - IceCube observation of a high-energy neutrino candidate track-like event",
"submitter": "Hop gcn.circular",
"authors": "Dr. Massimiliano Lincetto at Ruhr-Universitaet Bochum <lincetto@astro.rub.de>",
"data": {
"date": "23/06/03 15:14:00 GMT",
"from": "Dr. Massimiliano Lincetto at Ruhr-Universitaet Bochum <lincetto@astro.rub.de>",
"title": "GCN CIRCULAR",
"number": "33911",
"subject": "IceCube-230603A - IceCube observation of a high-energy neutrino candidate track-like event"
},
"message_text": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nOn 2023-06-03 at 05:00:47.13 UT IceCube detected a track-like event\nwith a moderate probability of being of astrophysical origin. \nThe event was selected by the ICECUBE_Astrotrack_Bronze alert stream.\nThe average astrophysical neutrino purity Bronze alerts is 30%.\n\nThis alert has an estimated false alarm rate of 1.24 events per year\ndue to atmospheric \nbackgrounds.\nThe IceCube detector was in a normal operating state at the time of\ndetection.\n\nAfter the initial automated alert\n(https://gcn.gsfc.nasa.gov/notices_amon_g_b/138005_24780443.amon), more\nsophisticated reconstruction algorithms have been applied offline, with\nthe direction refined to:\n\nDate: 2023-06-03\nTime: 05:00:47.13 UT\nRA: 68.20 (+2.62 / -3.06 deg 90% PSF containment) J2000\nDec: +24.21 (+2.08 / -2.59 deg 90% PSF containment) J2000\n\nWe encourage follow-up by ground and space-based instruments to help\nidentify a possible astrophysical source for the candidate neutrino.\n\nNo gamma-ray sources listed in the 4FGL-DR3 Fermi-LAT catalog are\nlocated within the 90% uncertainty region. The nearest source is 4FGL\nJ0439.2+2151, located 2.79 deg away from the best-fit alert position.\n\nThe IceCube Neutrino Observatory is a cubic-kilometer neutrino detector\noperating at the geographic South Pole, Antarctica.\n\nThe IceCube realtime alert point of contact can be reached at\nroc@icecube.wisc.edu\n\n\n",
"published": "2023-06-03T15:14:12.516662Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-03T15:14:12.516681Z",
"modified": "2023-06-03T15:14:12.524345Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 147,
"topic": "gcn.circular",
"uuid": "d65efa0f-5447-4d38-96f3-b5399a61d147",
"title": "LIGO/Virgo S230604z: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/04 09:32:38 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33912",
"subject": "LIGO/Virgo S230604z: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230604z errorbox 168 sec after notice time and 254 sec after trigger time at 2023-06-04 09:24:45 UT, with upper limit up to 17.2 mag. The observations began at zenith distance = 39 deg. The sun altitude is -25.4 deg.\n\nThe galactic latitude b = -62 deg., longitude l = 85 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011934\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 280 | 2023-06-04 09:24:45 | MASTER-OAFA | (23h 39m 21.01s , -04d 07m 15.8s) | C | 50 | 17.2 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-04T09:32:49.931571Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-04T09:32:49.931591Z",
"modified": "2023-06-04T09:32:49.936837Z",
"nonlocalizedevents": [
{
"event_id": "S230604z"
}
],
"targets": []
},
{
"id": 155,
"topic": "gcn.circular",
"uuid": "c547e3de-0a1e-4d16-a3e6-2d766350a4a4",
"title": "GRB 230604A: AstroSat CZTI detection of a short GRB",
"submitter": "Hop gcn.circular",
"authors": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"data": {
"date": "23/06/05 09:34:09 GMT",
"from": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"title": "GCN CIRCULAR",
"number": "33915",
"subject": "GRB 230604A: AstroSat CZTI detection of a short GRB"
},
"message_text": "G. Waratkar (IITB), P K. Navaneeth (IUCAA), A. Vibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (Ashoka University/IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:\n\nAnalysis of AstroSat CZTI data with the CIFT framework (Sharma et al., 2021, JApA, 42, 73) showed the detection of a short GRB 230604A which was also detected by KONUS-Wind (IPN_RAW Notices).\n\nThe source was clearly detected in the 20-200 keV energy range. The light curve peaks at 2023-06-04 05:53:48.0 UTC. The measured peak count rate associated with the burst is 669.5 (+184.9, -93.0) counts/s above the background in the combined data of all quadrants, with a total of 357 (+164, -169) counts. The local mean background count rate was 431.1 (+12.1, -15.6) counts/s. Using cumulative rates, we measure a T90 of 1.24 (+0.99, -0.73) s.\n\nThe source was also detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range.\n\nCZTI is built by a TIFR-led consortium of institutes across India, including VSSC, URSC, IUCAA, SAC, and PRL. The Indian Space Research Organisation funded, managed, and facilitated the project.\n\nCZTI GRB detections are reported regularly on the payload site at:\nhttp://astrosat.iucaa.in/czti/?q=grb\n\n",
"published": "2023-06-05T09:34:18.816676Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-05T09:34:18.816698Z",
"modified": "2023-06-05T09:34:18.823700Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 156,
"topic": "gcn.circular",
"uuid": "719662f2-e220-4e99-ad72-fec8e8e64c60",
"title": "Super-Kamiokande: Neutrino search for SN2023ixf",
"submitter": "Hop gcn.circular",
"authors": "Yusuke Koshio at Super-Kamiokande <koshio@okayama-u.ac.jp>",
"data": {
"date": "23/06/05 12:30:44 GMT",
"from": "Yusuke Koshio at Super-Kamiokande <koshio@okayama-u.ac.jp>",
"title": "GCN CIRCULAR",
"number": "33916",
"subject": "Super-Kamiokande: Neutrino search for SN2023ixf"
},
"message_text": "M. Nakahata, Kamioka Observatory, Institute for Cosmic Ray Research,\nUniversity of Tokyo, reports on behalf of the Super-Kamiokande collaboration:\n\nSuper-Kamiokande, a 50 ktons water Cherenkov imaging detector situated 1000 meters underground in the Kamioka mine, Gifu, Japan, has searched for neutrino signal correlated with SN2023ixf in a time window 2 days before the detection by Oak St. Observatory (2023-05-17 08:45:13 to 2023-05-19 08:45:13), during which Super-Kamiokande took data stably without dead time. In the electron total energy region between 7.0 MeV and 100 MeV within a fiducial volume of 22.5 ktons, no significant signal was observed.\n\n",
"published": "2023-06-05T12:30:53.709464Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-05T12:30:53.709484Z",
"modified": "2023-06-05T12:30:53.716183Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 158,
"topic": "gcn.circular",
"uuid": "0a0452dd-670c-427a-8d47-9400e8910019",
"title": "LIGO/Virgo/KAGRA S230601bf: Updated Sky localization",
"submitter": "Hop gcn.circular",
"authors": "Sylvia Biscoveanu at MIT <sylvia.biscoveanu@ligo.org>",
"data": {
"date": "23/06/05 16:54:29 GMT",
"from": "Sylvia Biscoveanu at MIT <sylvia.biscoveanu@ligo.org>",
"title": "GCN CIRCULAR",
"number": "33917",
"subject": "LIGO/Virgo/KAGRA S230601bf: Updated Sky localization"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:\n\nWe have conducted further analysis of the LIGO Hanford Observatory (H1) and LIGO Livingston Observatory (L1) data around the time of the compact binary merger (CBC) candidate S230601bf (GCN Circular 33903). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.offline0.multiorder.fits,0, distributed via GCN Notice, is available for retrieval from the GraceDB event page:\n\nhttps://gracedb.ligo.org/superevents/S230601bf\n\nFor the Bilby.offline0.multiorder.fits,0 sky map, the 90% credible region is 2531 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 3565 +/- 1260 Mpc (a posteriori mean +/- standard deviation).\n\nFor further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide <https://emfollow.docs.ligo.org/userguide/>.\n\n\n [1] Ashton et al. ApJS 241, 27 (2019)\n\n",
"published": "2023-06-05T16:54:41.628814Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-05T16:54:41.628834Z",
"modified": "2023-06-05T16:54:41.633846Z",
"nonlocalizedevents": [
{
"event_id": "S230601b"
}
],
"targets": []
},
{
"id": 159,
"topic": "gcn.circular",
"uuid": "e97c0e96-ffbb-4862-b019-6ca30f54ea75",
"title": "IceCube-230603A: Upper limits from a search for additional neutrino events in IceCube",
"submitter": "Hop gcn.circular",
"authors": "Sam Hori at IceCube/U Wisc-Madison <sahori@wisc.edu>",
"data": {
"date": "23/06/05 17:02:25 GMT",
"from": "Sam Hori at IceCube/U Wisc-Madison <sahori@wisc.edu>",
"title": "GCN CIRCULAR",
"number": "33918",
"subject": "IceCube-230603A: Upper limits from a search for additional neutrino events in IceCube"
},
"message_text": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\n\nIceCube has performed a search [1] for additional track-like muon neutrino events arriving from the direction of IceCube-230603A (https://gcn.nasa.gov/circulars/33911) in a time range of 1000 seconds centered on the alert event time (2023-06-03 04:52:27.130 UTC to 2023-06-03 05:09:07.130 UTC) during which IceCube was collecting good quality data. Excluding the event that prompted the alert, zero track-like events are found within the 90% containment region of IceCube-230603A. The IceCube sensitivity to neutrino point sources with an E^-2.5 spectrum (E^2 dN/dE at 1 TeV) within the locations spanned by the 90% spatial containment region of IceCube-230603A is 1.4e-01 GeV cm^-2 in a 1000 second time window. 90% of events IceCube would detect from a source at this declination with an E^-2.5 spectrum have energies in the approximate energy range between 2e+02 GeV and 8e+04 GeV.\n\n\nA subsequent search was performed including 2 days of data centered on the alert event time (2023-06-02 05:00:47.130 UTC to 2023-06-04 05:00:47.130 UTC). In this case, we report a p-value of 1.00, consistent with no significant excess of track events. The IceCube sensitivity to neutrino point sources with an E^-2.5 spectrum (E^2 dN/dE at 1 TeV) within the locations spanned by the 90% spatial containment region of IceCube-230603A is 1.7e-01 GeV cm^-2 in a 2 day time window.\n\n\nThe IceCube Neutrino Observatory is a cubic-kilometer neutrino detector operating at the geographic South Pole, Antarctica. The IceCube realtime alert point of contact can be reached at roc@icecube.wisc.edu<mailto:roc@icecube.wisc.edu>.\n\n\n[1] IceCube Collaboration, R. Abbasi et al., ApJ 910 4 (2021)\n\n",
"published": "2023-06-05T17:02:33.717507Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-05T17:02:33.717528Z",
"modified": "2023-06-05T17:02:33.723141Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 175,
"topic": "gcn.circular",
"uuid": "9520e508-840c-4976-b54d-a82fd9b213c4",
"title": "LIGO/Virgo S230606z: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/06 07:06:40 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33925",
"subject": "LIGO/Virgo S230606z: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230606z errorbox 63 sec after trigger time at 2023-06-06 06:54:23 UT, with upper limit up to 17.8 mag. The observations began at zenith distance = 68 deg. The sun altitude is -57.6 deg.\n\nThe galactic latitude b = 46 deg., longitude l = 229 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011954\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 154 | 2023-06-06 06:54:23 | MASTER-OAFA | (16h 14m 22.98s , +20d 47m 18.6s) | C | 180 | 17.8 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-06T07:06:48.924944Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-06T07:06:48.924975Z",
"modified": "2023-06-06T07:06:48.930617Z",
"nonlocalizedevents": [
{
"event_id": "S230606z"
}
],
"targets": []
},
{
"id": 176,
"topic": "gcn.circular",
"uuid": "955edb99-e814-4ca6-8b64-d0956e9d8824",
"title": "GRB 230606A: Swift/UVOT Upper Limits",
"submitter": "Hop gcn.circular",
"authors": "Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>",
"data": {
"date": "23/06/06 13:18:49 GMT",
"from": "Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>",
"title": "GCN CIRCULAR",
"number": "33926",
"subject": "GRB 230606A: Swift/UVOT Upper Limits"
},
"message_text": "A. A. Breeveld (UCL-MSSL) and A. Y. Lien (U. Tampa) report on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 230606A 2784 s after the BAT trigger (Lien et al., GCN Circ. 33921).\nNo optical afterglow consistent with the XRT position (Goad et al., GCN Circ. 33924) is detected in the initial UVOT exposures.\nPreliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are:\n\nFilter T_start(s) T_stop(s) Exp(s) Mag\n\nwhite_FC 2784 2934 147 >20.3\nwhite 2784 3554 344 >21.1\nv 3765 3965 197 >19.2\nb 3149 3349 197 >20.2\nu 2943 4514 328 >20.1\nw1 4176 4376 197 >20.2\nw2 3560 3760 197 >20.3\n\nThe magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.015 in the direction of the burst (Schlegel et al. 1998).\n\n",
"published": "2023-06-06T13:18:59.470695Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-06T13:18:59.470715Z",
"modified": "2023-06-06T13:18:59.478418Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 177,
"topic": "gcn.circular",
"uuid": "4a7b05f1-8eed-406b-a39e-532d93b5d5c5",
"title": "GRB 230604A: GRBAlpha detection",
"submitter": "Hop gcn.circular",
"authors": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"data": {
"date": "23/06/06 14:59:22 GMT",
"from": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"title": "GCN CIRCULAR",
"number": "33927",
"subject": "GRB 230604A: GRBAlpha detection"
},
"message_text": "M. Dafcikova, J. Ripa (Masaryk U.), A. Pal (Konkoly Observatory), N. Werner (Masaryk U.), M. Ohno, H. Takahashi (Hiroshima U.), L. Meszaros, B. Csak (Konkoly Observatory), N. Husarikova, F. Munz , M. Topinka, M. Kolar, J.-P. Breuer, F. Hroch (Masaryk U.), T. Urbanec, M. Kasal, A. Povalac (Brno U. of Technology), J. Hudec, J. Kapus, M. Frajt (Spacemanic s.r.o), R. Laszlo, M. Koleda (Needronix s.r.o), M. Smelko, P. Hanak, P. Lipovsky (Technical U. of Kosice), G. Galgoczi (Wigner Research Center/Eotvos U.), Y. Uchida, H. Poon, H. Matake (Hiroshima U.), N. Uchida (ISAS/JAXA), T. Bozoki (Eotvos U.), G. Dalya (Eotvos U.), yyT. Enoto (Kyoto U.), Zs. Frei (Eotvos U.), G. Friss (Eotvos U.), Y. Fukazawa, K. Hirose (Hiroshima U.), S. Hisadomi (Nagoya U.), Y. Ichinohe (Rikkyo U.), K. Kapas (Eotvos U.), L. L. Kiss (Konkoly Observatory), T. Mizuno (Hiroshima U.), K. Nakazawa (Nagoya U.), H. Odaka (Univ of Tokyo), J. Takatsy (Eotvos U.), K. Torigoe (Hiroshima U.), N. Kogiso, M. Yoneyama (Osaka Metropolitan U.), M. Moritaki (U. Tokyo), T. Kano (U. Michigan) -- the GRBAlpha collaboration.\n\nThe short-duration GRB 230604A (AstroSat detection: GCN 33915; INTEGRAL/SPI-ACS trigger at 2023-06-04 05:53:48 UT) was observed by the GRBAlpha 1U CubeSat (Pal et al. 2023; arXiv:2302.10048).\n\nThe detection was confirmed at the peak time 2023-06-04 05:53:48 UTC. The light curve observed by GRBAlpha shows a spike within one 1 s bin where the SNR reaches 6.6 sigma.\n\nThe light curve obtained by GRBAlpha is available here: https://grbalpha.konkoly.hu/static/share/GRB230604A_GCN.pdf\n\nAll GRBAlpha detections are listed at: https://monoceros.physics.muni.cz/hea/GRBAlpha/ \nGRBAlpha, launched on 2021 March 22, is a demonstration mission for a future CubeSat constellation (Werner et al. Proc. SPIE 2018). The detector of GRBAlpha consists of a 75 x 75 x 5 mm3 CsI scintillator read out by a SiPM array, covering the energy range from ~50 keV to ~1000 keV. To increase the duty cycle and the downlink rate, the upgrade of the on-board data acquisition software stack is in progress. The ground segment is also supported by the radio amateur community and it takes advantage of the SatNOGS network for increased data downlink volume. \n\n",
"published": "2023-06-06T14:59:36.290394Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-06T14:59:36.290431Z",
"modified": "2023-06-06T14:59:36.297500Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1587,
"topic": "gcn.circular",
"uuid": "9390c056-c1b7-45ce-8a2a-1a4414aa17b4",
"title": "Fermi-LAT gamma-ray observations of IceCube-230725A",
"submitter": "Hop gcn.circular",
"authors": "Simone Garrappa at DESY <simone.garrappa@desy.de>",
"data": {
"date": "23/07/28 00:11:45 GMT",
"from": "Simone Garrappa at DESY <simone.garrappa@desy.de>",
"title": "GCN CIRCULAR",
"number": "34279",
"subject": "Fermi-LAT gamma-ray observations of IceCube-230725A"
},
"message_text": "S. Garrappa (Weizmann Institute of Science), C. Bartolini (INFN Bari), S. Buson (Uni Wuerzburg) and J. Sinapius (DESY) on behalf of the Fermi-LAT collaboration:\n\nWe report an analysis of observations of the vicinity of the IC230725A high-energy neutrino event (GCN 34261) with all-sky survey data from the Large Area Telescope (LAT), on board the Fermi Gamma-ray Space Telescope. The IceCube event was detected on 2023-07-25 at 21:30:51.06 UT (T0) with J2000 position RA = 327.04 (+2.27, -2.03) deg, Decl. = 12.33 (+1.80, -1.36) deg (90% PSF containment). There is one Fermi 4FGL-DR3 cataloged gamma-ray (>100 MeV; The Fermi-LAT collaboration 2022, ApJS, 260, 53) source in the 90% IC230725A uncertainty localization region. This is 4FGL J2150.8+1118 associated with the BL Lac object NVSS J215051+111915, located at 1.2 deg from the IC230725A position. Based on a preliminary analysis of the LAT data over a month and day timescale prior T0, this object is not significantly detected at gamma rays.\n\nWe searched for intermediate (days to years) timescale emission from a new gamma-ray source. Preliminary analysis indicates no significant (> 5 sigma) new excess emission (> 100 MeV) at the IC230725A best-fit position. Assuming a power-law spectrum (photon index = 2.0 fixed) for a point source at the IC230725A best-fit position, the >100 MeV flux upper limit (95% confidence) is < 3.5e-10 ph cm^-2 s^-1 for ~15-years (2008-08-04 to 2023-07-25 UTC), and < 5.3e-9 (< 7.3e-8) ph cm^-2 s^-1 for a 1-month (1-day) integration time before T0.\n\n\nSince Fermi normally operates in an all-sky scanning mode, regular monitoring of this region will continue. For these observations the Fermi-LAT contact persons are S. Garrappa (simone.garrappa at weizmann.ac.il), C. Bartolini (chiara.bartolini at ba.infn.it), S. Buson (sara.buson at uni-wuerzburg.de) and J. Sinapius (jonas.sinapius at desy.de).\n\nThe Fermi-LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkwNTAzMTA5LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.DI3y7aLBQN3p0Af_cava1rtHV4y_59pWFHG4G-6CHdo\n\n",
"published": "2023-07-28T00:11:54.441680Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-28T00:11:54.441702Z",
"modified": "2023-07-28T00:11:54.448060Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 161,
"topic": "gcn.circular",
"uuid": "884da015-79d8-4f8e-9030-85dc8c4c4dff",
"title": "LIGO/Virgo/KAGRA S230605o: Updated Sky localization",
"submitter": "Hop gcn.circular",
"authors": "Aditya Vijaykumar <aditya.vijaykumar@ligo.org>",
"data": {
"date": "23/06/05 19:53:07 GMT",
"from": "Aditya Vijaykumar <aditya.vijaykumar@ligo.org>",
"title": "GCN CIRCULAR",
"number": "33919",
"subject": "LIGO/Virgo/KAGRA S230605o: Updated Sky localization"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:\n\nWe have conducted further analysis of the LIGO Hanford Observatory (H1) and LIGO Livingston Observatory (L1) data around the time of the compact binary merger (CBC) candidate S230605o (GCN Circular 33914). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.multiorder.fits,0, distributed via GCN Notice, is available for retrieval from the GraceDB event page:\n\nhttps://gracedb.ligo.org/superevents/S230605o\n\nFor the Bilby.multiorder.fits,0 sky map, the 90% credible region is 1077 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 1067 +/- 333 Mpc (a posteriori mean +/- standard deviation).\n\nFor further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide <https://emfollow.docs.ligo.org/userguide/>.\n\n\n [1] Ashton et al. ApJS 241, 27 (2019)\n\n",
"published": "2023-06-05T19:53:15.889616Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-05T19:53:15.889635Z",
"modified": "2023-06-05T19:53:15.894856Z",
"nonlocalizedevents": [
{
"event_id": "S230605o"
}
],
"targets": []
},
{
"id": 162,
"topic": "gcn.circular",
"uuid": "5b6877f2-6a90-45f2-b4df-a276537df999",
"title": "Fermi-LAT gamma-ray observations of IceCube-230603A",
"submitter": "Hop gcn.circular",
"authors": "Simone Garrappa at DESY <simone.garrappa@desy.de>",
"data": {
"date": "23/06/05 20:50:06 GMT",
"from": "Simone Garrappa at DESY <simone.garrappa@desy.de>",
"title": "GCN CIRCULAR",
"number": "33920",
"subject": "Fermi-LAT gamma-ray observations of IceCube-230603A"
},
"message_text": "S. Garrappa (Ruhr-Universitaet Bochum), S. Buson (Univ. of Wuerzburg) and J. Sinapius (DESY-Zeuthen)on behalf of the Fermi-LAT collaboration:\n\nWe report an analysis of observations of the vicinity of the IC230603A  high-energy neutrino event (GCN 33911) with all-sky survey data from the Large Area Telescope (LAT), on board the Fermi Gamma-ray Space Telescope. The IceCube event was detected on 2023-06-03 at 05:00:47.13 UT (T0) with J2000 position RA =68.20 (+2.62, -3.06) deg, Decl. = +24.21 (+2.08, -2.59) deg (90% PSF containment). Two cataloged gamma-ray (>100 MeV; The Fermi-LAT collaboration 2022, ApJS, 260, 53) sources are located within the 90% IC230603A localization region. These are 4FGL J0439.2+2151, associated with the blazar candidate of uncertain type IERS B0435+217, and the unassociated source 4FGL J0441.8+2600c. Based on a preliminary analysis of the LAT data over a month and day timescale prior T0, these objects are not significantly detected at gamma rays.\n\nWe searched for intermediate (days to years) timescale emission from a new gamma-ray transient source. Preliminary analysis indicates no significant (> 5 sigma) new excess emission (> 100 MeV) at the IC230603A best-fit position. Assuming a power-law spectrum (photon index = 2.0 fixed) for a point source at the IC230603A best-fit position, the >100 MeV flux upper limit (95% confidence) is < 1.8e-10 ph cm^-2 s^-1 for ~14-years (2008-08-04 to 2023-06-03 UTC), and < 9.7e-9 (< 9.5e-8) ph cm^-2 s^-1 for a 1-month (1-day) integration time before T0.\n\nSince Fermi normally operates in an all-sky scanning mode, regular monitoring of this region will continue. For these observations the Fermi-LAT contact persons are S. Garrappa (simone.garrappa atruhr-uni-bochum.de <http://ruhr-uni-bochum.de/>), J. Sinapius (jonas.sinapius atdesy.de <http://desy.de/>) and S. Buson (sara.buson atuni-wuerzburg.de <http://uni-wuerzburg.de/>).\n\nThe Fermi-LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden.\n\n\n",
"published": "2023-06-05T20:50:14.273514Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-05T20:50:14.273534Z",
"modified": "2023-06-05T20:50:14.280797Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 585,
"topic": "gcn.circular",
"uuid": "dd8e5c61-b133-488b-a3a8-4d7ecfde6e77",
"title": "ATLAS23msn/ZTF23aaoohpy/AT2023lcr: Zeiss-1000 of Koshka observatory optical observations",
"submitter": "Hop gcn.circular",
"authors": "Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>",
"data": {
"date": "23/06/24 19:39:55 GMT",
"from": "Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>",
"title": "GCN CIRCULAR",
"number": "34077",
"subject": "ATLAS23msn/ZTF23aaoohpy/AT2023lcr: Zeiss-1000 of Koshka observatory optical observations"
},
"message_text": "S. Belkin (IKI, HSE), I. Sokolov (KIAM), I. Nikolenko (INASAN), A. Pozanenko (IKI), N. Pankov (HSE) report on behalf of GRB IKI FuN:\n\nWe observed the field of ATLAS23msn/ZTF23aaoohpy/AT2023lcr (Swain et al., GCN 34022) with Zeiss-1000 telescope of Koshka observatory in R-filter on 2023-06-20 and 2023-06-23. We detect the optical counterpart (Gompertz et al., GCN34023; Kumar et al., GCN34025; Adami et al., GCN 34030; Perley et al, GCN 34031; Jiang et al., GCN 34040; Perley et al., GCN 34041; Fulton et al., 34042; Chen et al., GCN 34043; Belkin et al., GCN 34047; Breeveld, GCN 34049; Leonini et al., GCN 34052; Moskvitin et al., GCN 34060) on 2023-06-20 and obtained an upper limit on 2023-06-23. Preliminary photometry of a stacked images is following\n\nDate UT start MJD Exp. Filter OT Err. UL(3sigma)\n (mid exposure) (s)\n2023-06-20 19:14:22 60115.83567130 49*120 R 21.31 0.18 22.2\n2023-06-23 18:43:28 60118.80657407 38*120 R n/d n/d 21.7\n\nThe photometry is based on nearby SDSS-DR12 stars.\nSDSS-DR12\nRA DEC R(Lupton transformations)\n16:31:20.4491016 +26:24:03.644928 18.124\n16:31:41.2384008 +26:20:23.267580 17.545\n16:31:32.6899656 +26:20:16.058832 18.238\n16:31:31.3849992 +26:19:27.712488 18.804\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3NjM1NjAxLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.D-xAS29b_JedS3HWj5nX0-CVPEckT8D2qteO2BWpK9U\n\n",
"published": "2023-06-24T19:40:06.595927Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-24T19:40:06.595946Z",
"modified": "2023-06-24T19:40:06.601119Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 167,
"topic": "gcn.circular",
"uuid": "59d3fcc6-413c-418b-bede-c8940df2f128",
"title": "GRB 230606A: Swift detection of a burst",
"submitter": "Hop gcn.circular",
"authors": "David Palmer at LANL <palmer@lanl.gov>",
"data": {
"date": "23/06/06 01:15:46 GMT",
"from": "David Palmer at LANL <palmer@lanl.gov>",
"title": "GCN CIRCULAR",
"number": "33921",
"subject": "GRB 230606A: Swift detection of a burst"
},
"message_text": "\nA. Y. Lien (U Tampa), J.D. Gropp (PSU), J. A. Kennea (PSU),\nD. M. Palmer (LANL), T. M. Parsotan (GSFC/UMBC/CRESSTII) and\nB. Sbarufatti (INAF-OAB) report on behalf of the Neil Gehrels Swift\nObservatory Team:\n\nAt 00:14:37 the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 230606A (trigger\u001173731). Due to communications problems\nfrom a recent typhoon in Guam, only limited real-time data is\navailable and notices are being delayed. Swift had a delayed slew\nto the burst, presumably due to observing constraints.\nThe ground-calculated BAT location based on available data is\nRA, Dec 166.7956 36.5090.\nThere is no immediately-available BAT lightcurve data for\nthis GRB, however the BAT trigger duration was on the 2 second\ntimescale, suggesting a long GRB.\n\nUsing promptly downlinked data we find an uncatalogued X-ray source\nlocated at RA, Dec 166.81107, 36.48427 which is equivalent to:\n RA(J2000) = 11h 07m 14.66s\n Dec(J2000) = +36d 29' 03.4\"\nwith an uncertainty of 3.7 arcseconds (radius, 90% containment). This\nposition may be improved as more data are received; the latest position\nis available at https://www.swift.ac.uk/sper.\n\nA power-law fit to a spectrum formed from promptly downlinked event\ndata gives a column density in excess of the Galactic value (2.32 x\n10^20 cm^-2, Willingale et al. 2013), with an excess column of 4\n(+2.97/-2.57) x 10^21 cm^-2 (90% confidence).\n\nFurther information will be available after the complete data\ndownload at the next ground pass.\n\nBurst Advocate for this burst is A. Y. Lien (yarleen AT gmail.com).\nPlease contact the BA by email if you require additional information\nregarding Swift followup of this burst. In extremely urgent cases, after\ntrying the Burst Advocate, you can contact the Swift PI by phone (see\nSwift TOO web site for information: http://www.swift.psu.edu/)\n\n",
"published": "2023-06-06T01:15:55.009272Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-06T01:15:55.009291Z",
"modified": "2023-06-06T01:15:55.014272Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 169,
"topic": "gcn.circular",
"uuid": "14d19708-e424-4992-9d4e-d961c7648ab1",
"title": "LIGO/Virgo/KAGRA S230606d: Identification of a GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "yamazaki.ryo.77@gmail.com",
"data": {
"date": "23/06/06 02:03:29 GMT",
"from": "yamazaki.ryo.77@gmail.com",
"title": "GCN CIRCULAR",
"number": "33922",
"subject": "LIGO/Virgo/KAGRA S230606d: Identification of a GW compact binary merger candidate"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the\nKAGRA Collaboration report:\n\nWe identified the compact binary merger candidate S230606d during\nreal-time processing of data from LIGO Hanford Observatory (H1) and\nLIGO Livingston Observatory (L1) at 2023-06-06 00:43:05.793 UTC (GPS\ntime: 1370047403.793). The candidate was found by the CWB [1], MBTA\n[2], GstLAL [3], PyCBC Live [4], and SPIIR [5] analysis pipelines.\n\nS230606d is an event of interest because its false alarm rate, as\nestimated by the online analysis, is 1.1e-08 Hz, or about one in 2\nyears. The event's properties can be found at this URL:\n\nhttps://gracedb.ligo.org/superevents/S230606d\n\nThe classification of the GW signal, in order of descending\nprobability, is BBH (>99%), Terrestrial (<1%), BNS (<1%), or NSBH\n(<1%).\n\nAssuming the candidate is astrophysical in origin, the probability\nthat the lighter compact object is consistent with a neutron star mass\n(HasNS) is <1%. [6] Using the masses and spins inferred from the\nsignal, the probability of matter outside the final compact object\n(HasRemnant) is <1%. [6] Both HasNS and HasRemnant consider the\nsupport of several neutron star equations of state. The probability\nthat any one of the binary components lie between 3 to 5 solar mass\n(HasMassgap) is <1%.\n\nTwo sky maps are available at this time and can be retrieved from the\nGraceDB event page:\n * bayestar.multiorder.fits,0, an initial localization generated by\nBAYESTAR [7], distributed via GCN notice about 24 seconds after the\ncandidate event time.\n * bayestar.multiorder.fits,1, an initial localization generated by\nBAYESTAR [7], distributed via GCN notice about 5 minutes after the\ncandidate event time.\nThis candidate has had two Initial Alerts sent, with the same content, due to a glitch.\n\nThe preferred sky map at this time is bayestar.multiorder.fits,1. For\nthe bayestar.multiorder.fits,1 sky map, the 90% credible region is\n1286 deg2. Marginalized over the whole sky, the a posteriori\nluminosity distance estimate is 1818 +/- 557 Mpc (a posteriori mean\n+/- standard deviation).\n\nFor further information about analysis methodology and the contents of\nthis alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide\n<https://emfollow.docs.ligo.org/userguide/>.\n\n [1] Klimenko et al. PRD 93, 042004 (2016)\n [2] Aubin et al. CQG 38, 095004 (2021)\n [3] Tsukada et al. arXiv:2305.06286 (2023) and Ewing et al.\narXiv:2305.05625 (2023)\n [4] Dal Canton et al. ApJ 923, 254 (2021)\n [5] Chu et al. PRD 105, 024023 (2022)\n [6] Chatterjee et al. ApJ 896, 54 (2020)\n [7] Singer & Price PRD 93, 024013 (2016)\n\n",
"published": "2023-06-06T02:03:38.185296Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-06T02:03:38.185318Z",
"modified": "2023-06-06T02:03:38.191540Z",
"nonlocalizedevents": [
{
"event_id": "S230606d"
}
],
"targets": []
},
{
"id": 170,
"topic": "gcn.circular",
"uuid": "d72ff3c8-8ac2-4118-9aca-326758ca4ffb",
"title": "LIGO/Virgo S230606d: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/06 02:22:22 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33923",
"subject": "LIGO/Virgo S230606d: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the LIGO/Virgo S230606d errorbox 4075 sec after notice time and 4138 sec after trigger time at 2023-06-06 01:52:03 UT, with upper limit up to 18.7 mag. The observations began at zenith distance = 55 deg. The sun altitude is -46.1 deg.\n\nThe galactic latitude b = 31 deg., longitude l = 174 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011944\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 4228 | 2023-06-06 01:52:03 | MASTER-SAAO | (23h 29m 35.30s , -02d 50m 28.6s) | C | 180 | 18.7 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-06T02:22:31.711748Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-06T02:22:31.711768Z",
"modified": "2023-06-06T02:22:31.719302Z",
"nonlocalizedevents": [
{
"event_id": "S230606d"
}
],
"targets": []
},
{
"id": 171,
"topic": "gcn.circular",
"uuid": "0877977e-0acd-43ec-8ee0-35363101afe4",
"title": "GRB 230606A: Enhanced Swift-XRT position",
"submitter": "Hop gcn.circular",
"authors": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"data": {
"date": "23/06/06 06:08:02 GMT",
"from": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"title": "GCN CIRCULAR",
"number": "33924",
"subject": "GRB 230606A: Enhanced Swift-XRT position"
},
"message_text": "M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester)\nreport on behalf of the Swift-XRT team.\n\nUsing 1707 s of XRT Photon Counting mode data and 4 UVOT\nimages for GRB 230606A, we find an astrometrically corrected X-ray\nposition (using the XRT-UVOT alignment and matching UVOT field sources\nto the USNO-B1 catalogue): RA, Dec = 166.80951, +36.48425 which is equivalent\nto:\n\nRA (J2000): 11h 07m 14.28s\nDec (J2000): +36d 29' 03.3\"\n\nwith an uncertainty of 2.2 arcsec (radius, 90% confidence).\n\nThis position may be improved as more data are received. The latest\nposition can be viewed at http://www.swift.ac.uk/xrt_positions. Position\nenhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans\net al. (2009, MNRAS, 397, 1177).\n\nThis circular was automatically generated, and is an official product of the\nSwift-XRT team.\n\n",
"published": "2023-06-06T06:08:11.633431Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-06T06:08:11.633451Z",
"modified": "2023-06-06T06:08:11.639341Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2708,
"topic": "gcn.circular",
"uuid": "8f53523c-0f9d-41c3-9d83-7af3ec7aa776",
"title": "GRB 230904B is not a GRB",
"submitter": "Hop gcn.circular",
"authors": "Oliver J Roberts at USRA/NASA <oliver.roberts@nasa.gov>",
"data": {
"date": "23/09/04 16:39:00 GMT",
"from": "Oliver J Roberts at USRA/NASA <oliver.roberts@nasa.gov>",
"title": "GCN CIRCULAR",
"number": "34617",
"subject": "GRB 230904B is not a GRB"
},
"message_text": "Subject: GRB 230904B is not a GRB\n\nO.J. Roberts (USRA) and S. Bala (USRA), report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"The Fermi Gamma-ray Burst Monitor (GBM) trigger 715526984/230904562 at 13:29:39.52 UT\non 04 September 2023, previously named as GRB 230904B (GCN 34615), is in fact not due\nto a GRB. This trigger is due to particle activity.\"\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkzODQ1NTQ1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.ThSF89rbSWa6wUz4tM-BJPcDgOerlrrOBZYsBoxs2aw\n\n",
"published": "2023-09-04T16:39:16.972192Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-09-04T16:39:16.972210Z",
"modified": "2023-09-04T16:39:16.976726Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 178,
"topic": "gcn.circular",
"uuid": "0327cdd3-ed97-430e-a595-6fbf82ace0f8",
"title": "GRB 230606A: Swift-XRT refined Analysis",
"submitter": "Hop gcn.circular",
"authors": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"data": {
"date": "23/06/06 15:33:51 GMT",
"from": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"title": "GCN CIRCULAR",
"number": "33928",
"subject": "GRB 230606A: Swift-XRT refined Analysis"
},
"message_text": "T. Sbarrato (INAF-OAB), P. D'Avanzo (INAF-OAB), M.G. Bernardini\n(INAF-OAB), A. Tohuvavohu (U. Toronto), D.N. Burrows (PSU), J. D. Gropp\n(PSU), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester), P.A.\nEvans (U. Leicester) report on behalf of the Swift-XRT team:\n\nWe have analysed 6.8 ks of XRT data for GRB 230606A, from 2.8 ks to\n43.5 ks after the BAT trigger. The data are entirely in Photon\nCounting (PC) mode.\n\nThe light curve can be modelled with a power-law decay with a decay\nindex of alpha=1.16 (+0.09, -0.08).\n\nA spectrum formed from the PC mode data can be fitted with an absorbed\npower-law with a photon spectral index of 2.05 (+0.18, -0.17). The\nbest-fitting absorption column is 1.2 (+0.5, -0.4) x 10^21 cm^-2, in\nexcess of the Galactic value of 2.3 x 10^20 cm^-2 (Willingale et al.\n2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion\nfactor deduced from this spectrum is 3.3 x 10^-11 (4.2 x 10^-11) erg\ncm^-2 count^-1.\n\nA summary of the PC-mode spectrum is thus:\nTotal column:\t 1.2 (+0.5, -0.4) x 10^21 cm^-2\nGalactic foreground: 2.3 x 10^20 cm^-2\nExcess significance: 3.7 sigma\nPhoton index:\t 2.05 (+0.18, -0.17)\n\nIf the light curve continues to decay with a power-law decay index of\n1.16, the count rate at T+24 hours will be 0.010 count s^-1,\ncorresponding to an observed (unabsorbed) 0.3-10 keV flux of 3.3 x\n10^-13 (4.3 x 10^-13) erg cm^-2 s^-1.\n\nThe results of the XRT-team automatic analysis are available at\nhttp://www.swift.ac.uk/xrt_products/01173731.\n\nThis circular is an official product of the Swift-XRT team.\n\n",
"published": "2023-06-06T15:34:01.635650Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-06T15:34:01.635679Z",
"modified": "2023-06-06T15:34:01.642914Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 179,
"topic": "gcn.circular",
"uuid": "f2ff527e-3c56-43a0-8f9a-697d450391b6",
"title": "LIGO/Virgo/KAGRA S230602ap: Zwicky Transient Facility observations",
"submitter": "Hop gcn.circular",
"authors": "Tomas Ahumada at Caltech <tahumada@umd.edu>",
"data": {
"date": "23/06/06 16:26:09 GMT",
"from": "Tomas Ahumada at Caltech <tahumada@umd.edu>",
"title": "GCN CIRCULAR",
"number": "33929",
"subject": "LIGO/Virgo/KAGRA S230602ap: Zwicky Transient Facility observations"
},
"message_text": "Tomas Ahumada (CIT), Gaurav Waratkar (IITB), Viraj Karambelkar (CIT), Robert Stein (CIT), Anirudh Salgundi (IITB), Vishwajeet Swain (IITB), Theophile du Laz (CIT), Igor Andreoni (UMD), Michael Coughlin (UMN), Mansi Kasliwal (CIT), Varun Bhalerao (IITB), Simeon Reusch (DESY), Jannis Necker (DESY), Shreya Anand (CIT), Eric Bellm (UW), S.B. Cenko (UMD), D. Perley (LJMU), D. Kaplan (UWM), K-Ryan Hinds (LJMU) report on behalf of the ZTF and GROWTH collaborations:\n\nWe observed the localization region of LVC trigger S230602ap as part of routine Zwicky Transient Facility (ZTF; Graham et al., 2019; Bellm et al., 2019) survey operations. We obtained images in the r, i, and g bands beginning at 2023-06-03T03:58:31.996 (9 hours after the burst trigger time) corresponding to ~7% of the probability enclosed in the localization region.\n\nWe queried the ZTF alert stream using Kowalski (Duev et al. 2019) through Fritz (Coughlin et al. 2023) and emgwcave (Karambelkar et al. in prep), AMPEL (Nordin et al. 2019), and ZTFReST (Andreoni & Coughlin et al., 2021). We required at least 2 detections separated by at least 15 minutes to select against moving objects. Furthermore, we cross-match our candidates with the Minor Planet Center to flag known asteroids, reject stellar sources (Tachibana and Miller 2018), and apply machine learning algorithms (Mahabal et al. 2019). We require that no spatially coincident ZTF alerts were issued before the detection time of the LVC trigger. We also run forced photometry on ZTF images (Masci et al. 2019) and ATLAS images (Tonry et al. 2018, Smith et al. 2020) and require no detections before the LVC trigger.\n\nWe do not identify any sources that pass our selection criteria.\n\nFurther follow-up of this localization region will continue as part of regular survey operations.\n\nZTF and GROWTH are worldwide collaborations comprising Caltech, USA; IPAC, USA, WIS, Israel; OKC, Sweden; JSI/UMd, USA; U Washington, USA; DESY, Germany; MOST, Taiwan; UW Milwaukee, USA; LANL USA; Tokyo Tech, Japan; IITB, India; IIA, India; LJMU, UK; TTU, USA; SDSU, USA and USyd, Australia. ZTF acknowledges the generous support of the NSF under AST MSIP Grant No 1440341. GROWTH acknowledges generous support of the NSF under PIRE Grant No 1545949. Alert distribution service provided by DIRAC@UW (Patterson et al. 2019). Alert database searches are done by AMPEL (Nordin et al. 2019) and Kowalski (Duev et al. 2019). GROWTH India telescope is located at the Indian Astronomical Observatory (Hanle), operated by the Indian Institute of Astrophysics (IIA). GROWTH-India project is supported by SERB and administered by IUSSTF, under grant number IUSSTF/PIRE Program/GROWTH/2015-16 and IUCAA.\n\n",
"published": "2023-06-06T16:26:18.025574Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-06T16:26:18.025613Z",
"modified": "2023-06-06T16:26:18.043866Z",
"nonlocalizedevents": [
{
"event_id": "S230602a"
}
],
"targets": []
},
{
"id": 180,
"topic": "gcn.circular",
"uuid": "53950748-03c5-45b6-9c96-8ced9fd375c4",
"title": "GRB 230606A: BOOTES-5/JGT optical upper limit",
"submitter": "Hop gcn.circular",
"authors": "Youdong HU at IAA-CSIC <huyoudong072@hotmail.com>",
"data": {
"date": "23/06/06 17:14:28 GMT",
"from": "Youdong HU at IAA-CSIC <huyoudong072@hotmail.com>",
"title": "GCN CIRCULAR",
"number": "33930",
"subject": "GRB 230606A: BOOTES-5/JGT optical upper limit"
},
"message_text": "Y.-D. Hu, E. Fernandez-Garcia, A. J. Castro-Tirado, I. Perez-Garcia, M.D. Caballero-Garcia, R. Sanchez-Ramirez, S. Guziy (IAA-CSIC), D. Hiriart and W. H. Lee (UNAM), C. J. Perez del Pulgar (UMA) and I. M. Carrasco-Garcia (SMA) and I. H. Park (SKKU), on behalf of a larger collaboration, report:\n\nFollowing the detection of GRB 230606A by Swift (Lien et al. GCNC 33921), we triggered the BOOTES-5/JGT 0.6m robotic telescope at Observatorio Astronomico Nacional in San Pedro Martir (Mexico) to observe the GRB location starting on Jun. 06, 04:27:09 UT (~ 4.2 hrs after trigger). A series of images in clear filter were gathered. No new optical source is detected within the enhanced Swift/XRT error region (Goad et al. GCNC 33924) down to 20.3 mag, which is consistent with the limits reported by UVOT (Breeveld et al. GCNC 33926).\n\nWe thank the staff at Observatorio Astronomico Nacional in San Pedro Martir for their excellent support.\n\n",
"published": "2023-06-06T17:14:36.773321Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-06T17:14:36.773341Z",
"modified": "2023-06-06T17:14:36.779980Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 181,
"topic": "gcn.circular",
"uuid": "bc5ff4ec-ff35-4a29-85ab-b234b4362b13",
"title": "GRB 230606A: Fermi GBM Observation",
"submitter": "Hop gcn.circular",
"authors": "Sarah Dalessi at UAH <sd0104@uah.edu>",
"data": {
"date": "23/06/06 20:43:59 GMT",
"from": "Sarah Dalessi at UAH <sd0104@uah.edu>",
"title": "GCN CIRCULAR",
"number": "33931",
"subject": "GRB 230606A: Fermi GBM Observation"
},
"message_text": "S. Dalessi (UAH) and C. Meegan (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team:\n\n\"At 00:14:38.13 UT on 06 June 2023, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 230606A (trigger 707703283/230606010).\nwhich was also detected by Swift BAT (A. Y. Lien et al. 2023, GCN 33921).\nThe Fermi GBM on-ground location is consistent with the Swift BAT position.\n\nThe angle from the Fermi LAT boresight is 110 degrees.\n\nThe GBM light curve consists of multiple peaks with a duration (T90)\nof about 16 s (50-300 keV). The time-averaged spectrum\nfrom T0-1.8 to T0+18.7 s is best fit by\na power law function with an exponential high-energy cutoff.\nThe power law index is -0.7 +/- 0.2 and the cutoff energy,\nparameterized as Epeak, is 148 +/- 22 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(2.5 +/- 0.2)E-06 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+2.4 s in the 10-1000 keV band is 3.4 +/- 0.3 ph/s/cm^2.\n\nA Band function fits the spectrum equally well\nwith Epeak= 98 +/- 25 keV, alpha = -0.2 +/- 0.5 and beta = -2.1 +/- 0.2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog:\nhttps://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html\n\nFor Fermi GBM data and info, please visit the official Fermi GBM Support Page:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"\n\n",
"published": "2023-06-06T20:44:08.563456Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-06T20:44:08.563473Z",
"modified": "2023-06-06T20:44:08.570489Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 182,
"topic": "gcn.circular",
"uuid": "fbd755a6-5880-40b9-af84-a02e5b30b013",
"title": "GRB 230606A: Gaoyazi/GOT optical upper limit",
"submitter": "Hop gcn.circular",
"authors": "Dong Xu at NAOC/CAS <dxu@nao.cas.cn>",
"data": {
"date": "23/06/07 02:16:11 GMT",
"from": "Dong Xu at NAOC/CAS <dxu@nao.cas.cn>",
"title": "GCN CIRCULAR",
"number": "33932",
"subject": "GRB 230606A: Gaoyazi/GOT optical upper limit"
},
"message_text": "S.Y. Fu, T.H. Lu, S.Q. Jiang, X. Liu, Z.P. Zhu, D Xu (NAOC), S.W. Luo, M.M. Yang, Z. K. Feng (GYZO, NAOC) report:\n\nWe observed the field of GRB 230606A detected by Swift (Lien et al., GCN 33921) with the GOT-0.5m telescope located at Gaoyazi, Xinjiang, China. We obtained 20x180 s frames in the Sloan r-band and 15x180 s frames in the Sloan z-band, starting at 16:25:45 UT on 2023-06-06, i.e., 16.18 hr after the Swift/BAT trigger.\n\nNo optical source is detected in our stacked images at the enhanced XRT position (Goad et al., GCN 33924), and preliminary photometric results are as follows:\n\nT_mid-T0 (hr) Filter Upper_Limit (3-sigma)\n 16.74 r >20.9\n 18.05 z >18.1\n\ncalibrated with the nearby PanSTARRS field and not corrected for Galactic extinction.\n\n\n",
"published": "2023-06-07T02:16:20.590964Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-07T02:16:20.591004Z",
"modified": "2023-06-07T02:16:20.598243Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 183,
"topic": "gcn.circular",
"uuid": "dcae2806-6e16-42ee-bc34-5bdb85692561",
"title": "GRB 230606A: Swift-BAT refined analysis",
"submitter": "Hop gcn.circular",
"authors": "Amy Lien at GSFC <amy.y.lien@nasa.gov>",
"data": {
"date": "23/06/07 17:04:23 GMT",
"from": "Amy Lien at GSFC <amy.y.lien@nasa.gov>",
"title": "GCN CIRCULAR",
"number": "33933",
"subject": "GRB 230606A: Swift-BAT refined analysis"
},
"message_text": "A. Y. Lien (U Tampa), S. D. Barthelmy (GSFC),\nH. A. Krimm (NSF), S. Laha (GSFC/UMBC),\nC. B. Markwardt (GSFC), D. M. Palmer (LANL),\nT. Parsotan (GSFC/UMBC), T. Sakamoto (AGU),\nM. Stamatikos (OSU) (i.e. the Swift-BAT team):\n\nUsing the data set from T-240 to T+962 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 230606A (trigger #1173731)\n(Lien et al., GCN Circ. 33921). The BAT ground-calculated position is\nRA, Dec = 166.777, 36.504 deg which is\n RA(J2000) = 11h 07m 06.4s\n Dec(J2000) = +36d 30' 15.6\"\nwith an uncertainty of 2.5 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 15%.\n\nThe mask-weighted light curve shows two distinct pulses. The first pulse starts\nat ~T0 and ends at ~T+4 s. The second pulse starts at ~T+14 s and ends at ~T+16 s.\nT90 (15-350 keV) is 16.26 +- 1.29 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-0.26 to T+16.97 sec is best fit by a simple\npower-law model. The power law index of the time-averaged spectrum is\n1.15 +- 0.30. The fluence in the 15-150 keV band is 1.2 +- 0.2 x 10^-6 erg/cm2.\nThe 1-sec peak photon flux measured from T+0.92 sec in the 15-150 keV band\nis 2.6 +- 0.6 ph/cm2/sec. All the quoted errors are at the 90% confidence\nlevel.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/1173731/BA/\n\n",
"published": "2023-06-07T17:04:38.353912Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-07T17:04:38.353933Z",
"modified": "2023-06-07T17:04:38.361235Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 184,
"topic": "gcn.circular",
"uuid": "5dc5fb1e-4351-4ae5-862c-5c4e09911ea6",
"title": "ZTF and GIT Observations of the Candidate Optical Afterglow AT2023jxk",
"submitter": "Hop gcn.circular",
"authors": "Anna Y Q Ho at Cornell University <ayh24@cornell.edu>",
"data": {
"date": "23/06/07 18:13:36 GMT",
"from": "Anna Y Q Ho at Cornell University <ayh24@cornell.edu>",
"title": "GCN CIRCULAR",
"number": "33934",
"subject": "ZTF and GIT Observations of the Candidate Optical Afterglow AT2023jxk"
},
"message_text": "Jada Vail, Maggie Li, Anna Ho (Cornell), Harsh Kumar, Vishwajeet Swain (IIT Bombay), Dmitry Svinkin (Ioffe Institute), Daniel Perley (LJMU):\n\nWe report the discovery of a fast-evolving red transient in Zwicky Transient Facility (ZTF) and GROWTH India Telescope (GIT) data.\n\nZTF23aamxeqf (AT2023jxk) was discovered at the position (J2000) of:\n\nRA = 17:02:36.97 (255.6540479 deg)\n\nDec = +51:52:05.09 (51.8680802 deg)\n\non 2023 June 5 by ZTF at g = 19.22 +/- 0.13 mag (MJD`100.20252). ZTF also obtained a detection ~1.6 hours later at r = 18.96 +/- 0.11 mag (MJD`100.26712). Forced photometry on P48 images revealed non-detections prior to discovery at g > 19.91 mag (MJD`099.45061) and r > 20.14 mag (MJD`099.40459), indicating a fast rise rate of >0.9 mag/day in g and >1.5 mag/day in r. Forced photometry also shows two detections later that night at g = 19.84 +/- 0.18 (MJD`100.44324) and r = 19.14 +/- 0.08 (MJD`100.42868), implying that the transient was red.\n\nThe fast rise and fall rates implied by ZTF photometry motivated us to trigger GIT for additional imaging. GIT imaging 1.5 days after the first ZTF detection showed a tentative (3-sigma) detection at r = 22.4 +/- 0.2 mag, indicating an average fading rate of 2.3 mag/day in r-band.\n\nThe Galactic latitude of AT2023jxk is 37.6 degrees, and the Galactic reddening towards the direction of AT2023jxk is: E_(g-r) = 0.032 from Schlafly & Finkbeiner (2011). There is no counterpart within 3 arcseconds in either Legacy Survey DR9 imaging or PS1 imaging.\n\nThe fast rise, fast decay, red color, and lack of archival optical counterpart of AT2023jxk make it a strong candidate afterglow. However, we did not identify any GRBs coincident with this position during the time window between the last non-detection and the first detection: Konus-Wind was observing the whole sky during the entire interval of interest (except ~1 hour between 05:58:03 - 06:58:16 on June 4) and did not detect any counterpart.\n\nAdditional observations, including photometry and spectroscopy, are encouraged to determine the nature of this transient.\n\n\nZTF is supported by the National Science Foundation under Grant No. AST-2034437 and a collaboration including Caltech, IPAC, the Weizmann Institute for Science, the Oskar Klein Center at Stockholm University, the University of Maryland, Deutsches Elektronen-Synchrotron and Humboldt University, the TANGO Consortium of Taiwan, the University of Wisconsin at Milwaukee, Trinity College Dublin, Lawrence Livermore National Laboratories, and IN2P3, France. Operations are conducted by COO, IPAC, and UW.\n\nThe GROWTH India Telescope (GIT; Kumar et al. 2022) is a 70-cm telescope with a 0.7-degree field of view, set up by the Indian Institute of Astrophysics (IIA) and the Indian Institute of Technology Bombay (IITB) with funding from DST-SERB and IUSSTF. It is located at the Indian Astronomical Observatory (Hanle), operated by IIA. We acknowledge funding by the IITB alumni batch of 1994, which partially supports the operations of the telescope. Telescope technical details are available at https://sites.google.com/view/growthindia/.\n\n",
"published": "2023-06-07T18:13:46.368827Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-07T18:13:46.368845Z",
"modified": "2023-06-07T18:13:46.379388Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1338,
"topic": "gcn.circular",
"uuid": "a3dd1ffa-12db-4c1c-a9a2-155f72bc212a",
"title": "GRB 230718A: Fermi GBM Final Real-time Localization",
"submitter": "Hop gcn.circular",
"authors": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"data": {
"date": "23/07/18 04:40:41 GMT",
"from": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"title": "GCN CIRCULAR",
"number": "34225",
"subject": "GRB 230718A: Fermi GBM Final Real-time Localization"
},
"message_text": "The Fermi GBM team reports the detection of a likely SHORT GRB\n\nAt 04:30:02 UT on 18 Jul 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230718A (trigger 711347407.352732 / 230718188).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 146.0, Dec = 23.5 (J2000 degrees, equivalent to J2000 09h 43m, 23d 30'), with a statistical uncertainty of 33.5 degrees.\n\nThe angle from the Fermi LAT boresight is 79.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230718188/quicklook/glg_skymap_all_bn230718188.png\n\nThe HEALPix FITS file, including the estimated localization systematic, can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230718188/quicklook/glg_healpix_all_bn230718188.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230718188/quicklook/glg_lc_medres34_bn230718188.gif\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg5NjU1MjQ2LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.zSz3sOkjDp-NMEBCtmsZ4t3XZnTPElj5keX1lx1E20w\n\n",
"published": "2023-07-18T04:40:52.650305Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-18T04:40:52.650339Z",
"modified": "2023-07-18T04:40:52.658157Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 185,
"topic": "gcn.circular",
"uuid": "6a0b5dda-8dc7-4905-9869-deb18bae1b2a",
"title": "GRB 230506B: Chandra localization of the X-ray afterglow",
"submitter": "Hop gcn.circular",
"authors": "Brendan O'Connor at UMD <oconnorb@umd.edu>",
"data": {
"date": "23/06/07 19:35:15 GMT",
"from": "Brendan O'Connor at UMD <oconnorb@umd.edu>",
"title": "GCN CIRCULAR",
"number": "33935",
"subject": "GRB 230506B: Chandra localization of the X-ray afterglow"
},
"message_text": "B. O'Connor (GWU), S. Dichiara (PSU), E. Troja (UTV), S. B. Cenko (NASA-GSFC, UMD), C. Kouveliotou (GWU), T. Sakamoto (AGU), A. Kutyrev (UMD), G. Ryan (Perimeter), R. Ricci (INAF), G. Bruni (INAF):\n\nWe carried out two Chandra ToO observation of GRB 230506B beginning on May 11, 2023 at 06:59:55 UT and June 01, 2023 at 19:31:19 UT with ACIS-S as part of program 24400201 (PI: O'Connor) for a total of 19 ks and 55 ks, respectively. The initial observation began ~4.8 days after the GRB trigger (Dichiara et al. GCN 33727).\n\nWithin the XRT localization (Burrows et al. GCN 33737), we detect a single point source at RA, DEC = 21:47:55.6, 44:30:41.6 with an uncertainty of 0.9\" (90% confidence, statistical + systematic). The source displays rapid fading between the two Chandra epochs confirming that it is the X-ray afterglow of GRB 230506B.\n\nWe would like to thank Patrick Slane, Harvey Tananbaum, Dan Schwartz, Scott Wolk,\nand the CXO staff for rapidly approving and planning this observation.\n\n",
"published": "2023-06-07T19:35:23.684723Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-07T19:35:23.684740Z",
"modified": "2023-06-07T19:35:23.699440Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 186,
"topic": "gcn.circular",
"uuid": "968d24e5-a599-484a-8aab-cf5b5c27c94c",
"title": "Fermi trigger No 707039690: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/07 21:03:49 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33936",
"subject": "Fermi trigger No 707039690: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB230529.33 (trigger No 707039690,23h 07m 21.60s , -50d 00m 00.0s, R\u0012.67) errorbox 1 days 79079 sec after notice time and 1 days 79120 sec after trigger time at 2023-05-31 05:53:25 UT, with upper limit up to 18.8 mag. The observations began at zenith distance = 47 deg. The sun altitude is -69.7 deg.\n\nMASTER-SAAO robotic telescope located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB230529.33 errorbox 7 days 71418 sec after notice time and 7 days 71458 sec after trigger time at 2023-06-06 03:45:44 UT, with upper limit up to 19.4 mag. The observations began at zenith distance = 26 deg. The sun altitude is -22.2 deg.\n\nThe galactic latitude b = -60 deg., longitude l = 337 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"19660\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 165610 | 2023-05-31 05:53:25 | MASTER-OAFA | (21h 47m 17.84s , -50d 05m 55.5s) | C | 180 | 17.4 |\n 167446 | 2023-05-31 06:24:01 | MASTER-OAFA | (21h 47m 18.52s , -50d 07m 46.4s) | C | 180 | 18.8 |\n 168503 | 2023-05-31 06:41:38 | MASTER-OAFA | (21h 47m 18.17s , -50d 07m 42.1s) | C | 180 | 18.8 |\n 676349 | 2023-06-06 03:45:44 | MASTER-SAAO | (22h 52m 52.49s , -55d 59m 54.9s) | C | 180 | 19.0 |\n 676349 | 2023-06-06 03:45:44 | MASTER-SAAO | (22h 51m 04.42s , -56d 00m 22.1s) | C | 180 | 18.3 |\n 676650 | 2023-06-06 03:50:45 | MASTER-SAAO | (23h 07m 12.47s , -56d 00m 40.4s) | C | 180 | 19.3 |\n 676651 | 2023-06-06 03:50:45 | MASTER-SAAO | (23h 05m 38.47s , -55d 58m 59.7s) | C | 180 | 19.3 |\n 677395 | 2023-06-06 04:03:09 | MASTER-SAAO | (22h 52m 47.38s , -56d 01m 37.7s) | C | 180 | 19.2 |\n 677395 | 2023-06-06 04:03:09 | MASTER-SAAO | (22h 50m 59.24s , -56d 02m 07.4s) | C | 180 | 19.2 |\n 677697 | 2023-06-06 04:08:12 | MASTER-SAAO | (23h 07m 07.58s , -56d 00m 15.2s) | C | 180 | 19.4 |\n 677697 | 2023-06-06 04:08:12 | MASTER-SAAO | (23h 05m 34.25s , -55d 58m 30.3s) | C | 180 | 19.4 |\n 678000 | 2023-06-06 04:13:15 | MASTER-SAAO | (23h 07m 16.53s , -57d 54m 49.2s) | C | 180 | 18.9 |\n 678000 | 2023-06-06 04:13:15 | MASTER-SAAO | (23h 05m 38.70s , -57d 53m 04.1s) | C | 180 | 18.9 |\n 678211 | 2023-06-06 04:16:46 | MASTER-SAAO | (23h 22m 20.90s , -57d 54m 08.9s) | C | 180 | 19.1 |\n 678211 | 2023-06-06 04:16:46 | MASTER-SAAO | (23h 20m 43.06s , -57d 52m 23.5s) | C | 180 | 19.0 |\n 678422 | 2023-06-06 04:20:17 | MASTER-SAAO | (22h 37m 04.26s , -57d 53m 06.2s) | C | 180 | 18.9 |\n 678422 | 2023-06-06 04:20:17 | MASTER-SAAO | (22h 38m 42.35s , -57d 54m 52.4s) | C | 180 | 18.9 |\n 678857 | 2023-06-06 04:27:31 | MASTER-SAAO | (22h 50m 10.98s , -57d 53m 18.8s) | C | 180 | 18.5 |\n 678857 | 2023-06-06 04:27:31 | MASTER-SAAO | (22h 51m 48.83s , -57d 55m 05.8s) | C | 180 | 18.6 |\n 679068 | 2023-06-06 04:31:03 | MASTER-SAAO | (23h 05m 44.12s , -57d 51m 48.3s) | C | 180 | 18.5 |\n 679068 | 2023-06-06 04:31:03 | MASTER-SAAO | (23h 07m 22.43s , -57d 53m 34.4s) | C | 180 | 18.6 |\n 679505 | 2023-06-06 04:38:20 | MASTER-SAAO | (23h 20m 39.49s , -57d 52m 00.5s) | C | 180 | 17.9 |\n 679505 | 2023-06-06 04:38:20 | MASTER-SAAO | (23h 22m 17.79s , -57d 53m 44.9s) | C | 180 | 17.9 |\n 679717 | 2023-06-06 04:41:51 | MASTER-SAAO | (22h 35m 13.82s , -57d 51m 35.0s) | C | 180 | 17.1 |\n 679717 | 2023-06-06 04:41:51 | MASTER-SAAO | (22h 36m 52.11s , -57d 53m 23.3s) | C | 180 | 17.1 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-07T21:03:58.074169Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-07T21:03:58.074187Z",
"modified": "2023-06-07T21:03:58.081713Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 187,
"topic": "gcn.circular",
"uuid": "680e5c03-b7f4-4eda-9166-65ec044e8424",
"title": "Fermi GRB 230603A: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/07 21:03:51 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33937",
"subject": "Fermi GRB 230603A: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB 230603A ( Fermi GBM team, GCN 33910) errorbox 1 days 62021 sec after notice time and 1 days 62028 sec after trigger time at 2023-06-05 05:49:18 UT, with upper limit up to 17.4 mag. The observations began at zenith distance = 28 deg. The sun altitude is -71.0 deg.\n\nThe galactic latitude b = -16 deg., longitude l = 28 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"20782\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 148519 | 2023-06-05 05:49:18 | MASTER-OAFA | (19h 36m 44.32s , -12d 09m 24.2s) | C | 180 | 16.9 |\n 148699 | 2023-06-05 05:49:18 | MASTER-OAFA | (19h 36m 44.32s , -12d 09m 24.2s) | C | 540 | 17.4 | Coadd\n 148730 | 2023-06-05 05:52:49 | MASTER-OAFA | (19h 36m 49.42s , -12d 10m 24.5s) | C | 180 | 16.9 |\n 148942 | 2023-06-05 05:56:21 | MASTER-OAFA | (19h 36m 42.96s , -12d 11m 25.1s) | C | 180 | 16.8 |\n 149797 | 2023-06-05 06:10:36 | MASTER-OAFA | (19h 36m 48.72s , -12d 09m 29.5s) | C | 180 | 15.5 |\n 150804 | 2023-06-05 06:27:23 | MASTER-OAFA | (19h 36m 50.02s , -12d 11m 07.1s) | C | 180 | 16.7 |\n 154240 | 2023-06-05 07:24:39 | MASTER-OAFA | (19h 29m 31.33s , -14d 34m 07.0s) | C | 180 | 16.9 |\n 155299 | 2023-06-05 07:42:18 | MASTER-OAFA | (19h 29m 23.79s , -14d 32m 35.0s) | C | 180 | 17.2 |\n 155934 | 2023-06-05 07:52:53 | MASTER-OAFA | (19h 37m 42.65s , -14d 33m 21.1s) | C | 180 | 16.9 |\n 165891 | 2023-06-05 10:38:50 | MASTER-OAFA | (19h 21m 33.74s , -13d 31m 44.8s) | C | 180 | 16.7 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-07T21:04:00.102074Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-07T21:04:00.102101Z",
"modified": "2023-06-07T21:04:00.202823Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6705,
"topic": "gcn.circular",
"uuid": "94867c94-781a-41ea-b8c7-00129086b0c7",
"title": "Swift GRB 240419B: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "24/04/19 19:36:52 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36188"
},
"title": "GCN CIRCULAR",
"number": "36188",
"subject": "Swift GRB 240419B: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko,\nG.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gress, N.M. Budnev, O.Ershova\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,\nA.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nV. Yurkov, A. Gabovich\n(Blagoveschensk Educational State University)\n\nMASTER-Amur robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Blagoveshchensk State Pedagogical University) was pointed to the Swift GRB 240419B ( S. Dichiara et al., GCN 36180) errorbox 24752 sec after notice time and 24919 sec after trigger time at 2024-04-19 19:18:11 UT, with upper limit up to 15.6 mag. Observations started at twilight. The observations began at zenith distance = 69 deg. The sun altitude is -11.0 deg.\n\nThe galactic latitude b = -35 deg., longitude l = 61 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id$27564\n\nWe obtain a following upper limits.\n\nTmid-T0 | Site |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____|_______|______|________\n\n 25009 | MASTER-Amur | C | 180 | 15.1 |\n 25009 | MASTER-Amur | C | 180 | 15.6 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36188.",
"published": "2024-04-19T19:37:08.066309Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-19T19:37:08.066331Z",
"modified": "2024-04-19T19:37:08.074863Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 200,
"topic": "gcn.circular",
"uuid": "6fda7440-1b2f-4dcd-b4ef-ccdbd2ffc396",
"title": "LIGO/Virgo/KAGRA S230608as: Identification of a GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "Jessica Irwin at University of Glasgow <jessica.irwin@ligo.org>",
"data": {
"date": "23/06/08 21:39:20 GMT",
"from": "Jessica Irwin at University of Glasgow <jessica.irwin@ligo.org>",
"title": "GCN CIRCULAR",
"number": "33938",
"subject": "LIGO/Virgo/KAGRA S230608as: Identification of a GW compact binary merger candidate"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the\nKAGRA Collaboration report:\n\nWe identified the compact binary merger candidate S230608as during\nreal-time processing of data from LIGO Hanford Observatory (H1) and\nLIGO Livingston Observatory (L1) at 2023-06-08 20:50:47.161 UTC (GPS\ntime: 1370292665.161). The candidate was found by the CWB [1], MBTA\n[2], GstLAL [3], and SPIIR [4] analysis pipelines.\n\nS230608as is an event of interest because its false alarm rate, as\nestimated by the online analysis, is 1.4e-10 Hz, or about one in 1e2\nyears. The event's properties can be found at this URL:\n\nhttps://gracedb.ligo.org/superevents/S230608as\n\nThe classification of the GW signal, in order of descending\nprobability, is BBH (>99%), Terrestrial (<1%), NSBH (<1%), or BNS\n(<1%).\n\nAssuming the candidate is astrophysical in origin, the probability\nthat the lighter compact object is consistent with a neutron star mass\n(HasNS) is <1%. [5] Using the masses and spins inferred from the\nsignal, the probability of matter outside the final compact object\n(HasRemnant) is <1%. [5] Both HasNS and HasRemnant consider the\nsupport of several neutron star equations of state. The probability\nthat any one of the binary components lie between 3 to 5 solar mass\n(HasMassgap) is <1%.\n\nTwo sky maps are available at this time and can be retrieved from the\nGraceDB event page:\n * bayestar.multiorder.fits,1, an initial localization generated by\nBAYESTAR [6], distributed via GCN notice about 24 seconds after the\ncandidate event time.\n * bayestar.multiorder.fits,2, an initial localization generated by\nBAYESTAR [6], distributed via GCN notice about 41 minutes after the\ncandidate event time.\n\nThe preferred sky map at this time is bayestar.multiorder.fits,2. For\nthe bayestar.multiorder.fits,2 sky map, the 90% credible region is\n2217 deg2. Marginalized over the whole sky, the a posteriori\nluminosity distance estimate is 3193 +/- 956 Mpc (a posteriori mean\n+/- standard deviation).\n\nFor further information about analysis methodology and the contents of\nthis alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide\n<https://emfollow.docs.ligo.org/userguide/>.\n\n [1] Klimenko et al. PRD 93, 042004 (2016)\n [2] Aubin et al. CQG 38, 095004 (2021)\n [3] Tsukada et al. arXiv:2305.06286 (2023) and Ewing et al.\narXiv:2305.05625 (2023)\n [4] Chu et al. PRD 105, 024023 (2022)\n [5] Chatterjee et al. ApJ 896, 54 (2020)\n [6] Singer & Price PRD 93, 024013 (2016)\n\n",
"published": "2023-06-08T21:39:34.648344Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-08T21:39:34.648368Z",
"modified": "2023-06-08T21:39:34.654672Z",
"nonlocalizedevents": [
{
"event_id": "S230608a"
}
],
"targets": []
},
{
"id": 207,
"topic": "gcn.circular",
"uuid": "bdc08f09-a421-4ba9-a482-2a9e6071e031",
"title": "ZTF23aamxeqf/AT2023jxk: 1.3m DFOT Optical upper limit",
"submitter": "Hop gcn.circular",
"authors": "Amit Kumar Ror at ARIES <mitturor77894@gmail.com>",
"data": {
"date": "23/06/09 04:45:36 GMT",
"from": "Amit Kumar Ror at ARIES <mitturor77894@gmail.com>",
"title": "GCN CIRCULAR",
"number": "33939",
"subject": "ZTF23aamxeqf/AT2023jxk: 1.3m DFOT Optical upper limit"
},
"message_text": "Amit K. Ror, B. Kumar, Rahul Gupta, S. B. Pandey, A. Aryan, A. Ghosh, and\nK. Misra (ARIES) report:\n\n\nWe observed the field of fast optical transient ZTF23aamxeqf/AT2023jxk\ndiscovered by Zwicky Transient Facility (ZTF) and GROWTH India Telescope\n(GIT) with the 1.3m Devasthal Fast Optical Telescope (DFOT) located at the\nDevasthal observatory of Aryabhatta Research Institute of Observational\nSciences (ARIES), India. The observations were started on 2023-06-07 at\n19:03:55 UT, i.e., ~ 2.59 days after the ZTF trigger. We have taken\nmultiple frames having an exposure time of 300s in the R filter. We stacked\nthe images after the alignment. We did not detect the optical afterglow\ncandidate reported previously by Vail et al. (2023), GCN 33934, in our\nstacked image. We obtain the following 3-sigma upper limit in the stacked\nimage.\n\n\nDate Start_UT T_start-T0 (days) Filter Exp time (s) Limiting magnitude\n\n===================================================\n2023-06-07 19:03:55 ~2.59 R 300*24 > 20.8\n\n\nThe magnitude is not corrected for the Galactic extinction in the direction\nof the burst. Photometric calibration is performed using the standard stars\nfrom the USNO-B1.0 catalog. This circular may be cited.\n\n",
"published": "2023-06-09T04:45:44.755646Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-09T04:45:44.755678Z",
"modified": "2023-06-09T04:45:44.763154Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 208,
"topic": "gcn.circular",
"uuid": "293c072e-52ed-4a76-ace0-0f0143385ca1",
"title": "LIGO/Virgo S230608q: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/09 06:40:44 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33940",
"subject": "LIGO/Virgo S230608q: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230608q errorbox 47668 sec after notice time and 47755 sec after trigger time at 2023-06-08 22:38:00 UT, with upper limit up to 19.1 mag. Observations started at twilight. The observations began at zenith distance = 55 deg. The sun altitude is -12.4 deg.\n\nThe galactic latitude b = 43 deg., longitude l = 88 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011958\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 47845 | 2023-06-08 22:38:00 | MASTER-OAFA | (08h 40m 42.61s , +10d 16m 17.1s) | C | 180 | 17.0 |\n 48057 | 2023-06-08 22:41:31 | MASTER-OAFA | (08h 48m 45.49s , +10d 15m 35.1s) | C | 180 | 17.5 |\n 48737 | 2023-06-08 22:52:52 | MASTER-OAFA | (08h 44m 18.11s , +12d 08m 44.5s) | C | 180 | 18.3 |\n 48948 | 2023-06-08 22:56:23 | MASTER-OAFA | (08h 52m 26.08s , +12d 10m 26.2s) | C | 180 | 18.4 |\n 49525 | 2023-06-08 23:05:59 | MASTER-OAFA | (08h 44m 11.83s , +12d 10m 08.8s) | C | 180 | 18.5 |\n 49736 | 2023-06-08 23:09:31 | MASTER-OAFA | (08h 52m 29.57s , +12d 09m 23.8s) | C | 180 | 18.3 |\n 49948 | 2023-06-08 23:13:02 | MASTER-OAFA | (08h 59m 46.53s , +12d 08m 37.0s) | C | 180 | 18.3 |\n 50263 | 2023-06-08 23:18:17 | MASTER-OAFA | (08h 56m 08.80s , +10d 14m 26.6s) | C | 180 | 18.3 |\n 61901 | 2023-06-09 02:32:16 | MASTER-OAFA | (16h 25m 28.81s , +15d 58m 24.4s) | C | 180 | 18.7 |\n 62475 | 2023-06-09 02:41:50 | MASTER-OAFA | (16h 17m 14.77s , +15d 56m 35.6s) | C | 180 | 18.8 |\n 62686 | 2023-06-09 02:45:21 | MASTER-OAFA | (16h 25m 31.84s , +15d 58m 01.7s) | C | 180 | 18.7 |\n 62899 | 2023-06-09 02:48:53 | MASTER-OAFA | (16h 16m 08.41s , +12d 10m 33.0s) | C | 180 | 18.8 |\n 63321 | 2023-06-09 02:55:56 | MASTER-OAFA | (16h 11m 25.11s , +17d 51m 42.3s) | C | 180 | 19.1 |\n 63754 | 2023-06-09 03:03:09 | MASTER-OAFA | (16h 16m 08.48s , +12d 08m 43.0s) | C | 180 | 18.8 |\n 64176 | 2023-06-09 03:10:11 | MASTER-OAFA | (16h 11m 22.37s , +17d 51m 05.9s) | C | 180 | 18.9 |\n 64388 | 2023-06-09 03:13:42 | MASTER-OAFA | (16h 19m 51.02s , +17d 52m 10.5s) | C | 180 | 18.7 |\n 64598 | 2023-06-09 03:17:13 | MASTER-OAFA | (16h 27m 21.26s , +17d 52m 17.2s) | C | 180 | 18.6 |\n 65021 | 2023-06-09 03:24:15 | MASTER-OAFA | (15h 57m 48.76s , +25d 27m 10.4s) | C | 180 | 18.5 |\n 65231 | 2023-06-09 03:27:46 | MASTER-OAFA | (16h 06m 39.41s , +25d 28m 17.1s) | C | 180 | 18.4 |\n 65443 | 2023-06-09 03:31:17 | MASTER-OAFA | (16h 27m 23.14s , +17d 50m 22.6s) | C | 180 | 18.5 |\n 66108 | 2023-06-09 03:42:23 | MASTER-OAFA | (16h 06m 37.05s , +25d 28m 35.5s) | C | 180 | 18.4 |\n 66320 | 2023-06-09 03:45:54 | MASTER-OAFA | (15h 56m 46.50s , +27d 20m 45.9s) | C | 180 | 18.4 |\n 66561 | 2023-06-09 03:49:55 | MASTER-OAFA | (16h 05m 55.62s , +27d 20m 40.7s) | C | 180 | 18.4 |\n 67196 | 2023-06-09 04:00:30 | MASTER-OAFA | (15h 56m 46.30s , +27d 21m 32.2s) | C | 180 | 18.4 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-09T06:40:53.241037Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-09T06:40:53.241056Z",
"modified": "2023-06-09T06:40:53.249767Z",
"nonlocalizedevents": [
{
"event_id": "S230608q"
}
],
"targets": []
},
{
"id": 209,
"topic": "gcn.circular",
"uuid": "3af0fce3-f9cc-4f44-b301-cd4bb8aea3d9",
"title": "LIGO/Virgo S230608ah: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/09 06:40:59 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33941",
"subject": "LIGO/Virgo S230608ah: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230608ah errorbox 12425 sec after notice time and 12487 sec after trigger time at 2023-06-08 22:34:29 UT, with upper limit up to 19.1 mag. Observations started at twilight. The observations began at zenith distance = 49 deg. The sun altitude is -11.7 deg.\n\nThe galactic latitude b = -49 deg., longitude l = 355 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011966\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 12577 | 2023-06-08 22:34:29 | MASTER-OAFA | (09h 19m 45.04s , +10d 16m 10.7s) | C | 180 | 16.9 |\n 12788 | 2023-06-08 22:38:00 | MASTER-OAFA | (08h 40m 42.61s , +10d 16m 17.1s) | C | 180 | 17.0 |\n 13000 | 2023-06-08 22:41:31 | MASTER-OAFA | (08h 48m 45.49s , +10d 15m 35.1s) | C | 180 | 17.5 |\n 13469 | 2023-06-08 22:49:20 | MASTER-OAFA | (09h 19m 47.35s , +10d 16m 35.2s) | C | 180 | 18.5 |\n 13680 | 2023-06-08 22:52:52 | MASTER-OAFA | (08h 44m 18.11s , +12d 08m 44.5s) | C | 180 | 18.3 |\n 13891 | 2023-06-08 22:56:23 | MASTER-OAFA | (08h 52m 26.08s , +12d 10m 26.2s) | C | 180 | 18.4 |\n 14257 | 2023-06-08 23:02:28 | MASTER-OAFA | (09h 07m 57.66s , +12d 10m 02.0s) | C | 180 | 18.4 |\n 14468 | 2023-06-08 23:05:59 | MASTER-OAFA | (08h 44m 11.83s , +12d 10m 08.8s) | C | 180 | 18.5 |\n 14679 | 2023-06-08 23:09:31 | MASTER-OAFA | (08h 52m 29.57s , +12d 09m 23.8s) | C | 180 | 18.3 |\n 14891 | 2023-06-08 23:13:02 | MASTER-OAFA | (08h 59m 46.53s , +12d 08m 37.0s) | C | 180 | 18.3 |\n 15206 | 2023-06-08 23:18:17 | MASTER-OAFA | (08h 56m 08.80s , +10d 14m 26.6s) | C | 180 | 18.3 |\n 15417 | 2023-06-08 23:21:48 | MASTER-OAFA | (09h 04m 19.58s , +10d 16m 34.0s) | C | 180 | 18.3 |\n 15628 | 2023-06-08 23:25:20 | MASTER-OAFA | (09h 04m 05.84s , +14d 04m 36.7s) | C | 180 | 18.2 |\n 16396 | 2023-06-08 23:38:08 | MASTER-OAFA | (09h 04m 09.12s , +14d 04m 21.0s) | C | 180 | 18.3 |\n 16608 | 2023-06-08 23:41:39 | MASTER-OAFA | (09h 12m 25.13s , +14d 02m 50.7s) | C | 180 | 18.2 |\n 16819 | 2023-06-08 23:45:10 | MASTER-OAFA | (16h 30m 03.55s , +06d 27m 03.3s) | C | 180 | 17.8 |\n 17306 | 2023-06-08 23:53:17 | MASTER-OAFA | (16h 34m 37.94s , +08d 19m 53.2s) | C | 180 | 17.9 |\n 17517 | 2023-06-08 23:56:49 | MASTER-OAFA | (16h 42m 49.11s , +08d 19m 39.6s) | C | 180 | 17.8 |\n 17728 | 2023-06-09 00:00:20 | MASTER-OAFA | (16h 30m 06.68s , +06d 27m 57.5s) | C | 180 | 18.0 |\n 17939 | 2023-06-09 00:03:51 | MASTER-OAFA | (16h 38m 09.93s , +06d 26m 06.5s) | C | 180 | 17.8 |\n 18150 | 2023-06-09 00:07:22 | MASTER-OAFA | (16h 34m 43.29s , +08d 21m 49.1s) | C | 180 | 17.9 |\n 18750 | 2023-06-09 00:17:22 | MASTER-OAFA | (16h 32m 12.03s , +14d 02m 05.9s) | C | 180 | 17.2 |\n 18962 | 2023-06-09 00:20:53 | MASTER-OAFA | (16h 31m 42.03s , +12d 09m 50.3s) | C | 180 | 17.8 |\n 19467 | 2023-06-09 00:29:19 | MASTER-OAFA | (16h 32m 11.60s , +14d 03m 10.8s) | C | 180 | 17.9 |\n 20178 | 2023-06-09 00:41:10 | MASTER-OAFA | (16h 24m 58.34s , +10d 14m 43.5s) | C | 180 | 12.8 |\n 20737 | 2023-06-09 00:50:28 | MASTER-OAFA | (16h 24m 50.96s , +10d 16m 28.1s) | C | 180 | 18.4 |\n 20948 | 2023-06-09 00:54:00 | MASTER-OAFA | (16h 24m 50.99s , +10d 16m 28.3s) | C | 180 | 13.5 |\n 21159 | 2023-06-09 00:57:30 | MASTER-OAFA | (16h 40m 20.28s , +10d 13m 56.4s) | C | 180 | 17.7 |\n 21581 | 2023-06-09 01:04:32 | MASTER-OAFA | (16h 41m 55.07s , +04d 32m 14.2s) | C | 180 | 18.5 |\n 21792 | 2023-06-09 01:08:04 | MASTER-OAFA | (16h 50m 01.18s , +04d 33m 29.8s) | C | 180 | 18.1 |\n 22696 | 2023-06-09 01:23:08 | MASTER-OAFA | (16h 41m 54.58s , +04d 32m 15.4s) | C | 180 | 18.6 |\n 22908 | 2023-06-09 01:26:39 | MASTER-OAFA | (16h 49m 59.51s , +04d 33m 16.7s) | C | 180 | 18.6 |\n 23785 | 2023-06-09 01:41:16 | MASTER-OAFA | (16h 41m 23.91s , +15d 57m 46.8s) | C | 180 | 18.0 |\n 23996 | 2023-06-09 01:44:48 | MASTER-OAFA | (16h 45m 24.91s , +06d 26m 12.7s) | C | 180 | 18.8 |\n 24449 | 2023-06-09 01:52:21 | MASTER-OAFA | (16h 41m 21.52s , +15d 57m 59.8s) | C | 180 | 18.3 |\n 25044 | 2023-06-09 02:02:16 | MASTER-OAFA | (16h 50m 02.38s , +08d 19m 55.8s) | C | 180 | 18.6 |\n 25256 | 2023-06-09 02:05:48 | MASTER-OAFA | (16h 58m 11.42s , +08d 21m 09.1s) | C | 180 | 18.7 |\n 25468 | 2023-06-09 02:09:19 | MASTER-OAFA | (16h 39m 37.04s , +14d 03m 02.8s) | C | 180 | 18.6 |\n 25679 | 2023-06-09 02:12:50 | MASTER-OAFA | (16h 47m 51.86s , +14d 03m 49.8s) | C | 180 | 18.6 |\n 25890 | 2023-06-09 02:16:21 | MASTER-OAFA | (16h 50m 05.92s , +08d 20m 47.3s) | C | 180 | 18.6 |\n 26100 | 2023-06-09 02:19:52 | MASTER-OAFA | (16h 58m 05.50s , +08d 19m 30.2s) | C | 180 | 18.8 |\n 26312 | 2023-06-09 02:23:23 | MASTER-OAFA | (16h 39m 32.75s , +02d 39m 54.3s) | C | 180 | 18.9 |\n 26844 | 2023-06-09 02:32:16 | MASTER-OAFA | (16h 25m 28.81s , +15d 58m 24.4s) | C | 180 | 18.7 |\n 27206 | 2023-06-09 02:38:17 | MASTER-OAFA | (16h 47m 29.68s , +02d 37m 43.2s) | C | 180 | 18.8 |\n 27418 | 2023-06-09 02:41:50 | MASTER-OAFA | (16h 17m 14.77s , +15d 56m 35.6s) | C | 180 | 18.8 |\n 27629 | 2023-06-09 02:45:21 | MASTER-OAFA | (16h 25m 31.84s , +15d 58m 01.7s) | C | 180 | 18.7 |\n 27842 | 2023-06-09 02:48:53 | MASTER-OAFA | (16h 16m 08.41s , +12d 10m 33.0s) | C | 180 | 18.8 |\n 28053 | 2023-06-09 02:52:24 | MASTER-OAFA | (16h 24m 14.54s , +12d 09m 22.5s) | C | 180 | 18.8 |\n 28264 | 2023-06-09 02:55:56 | MASTER-OAFA | (16h 11m 25.11s , +17d 51m 42.3s) | C | 180 | 19.1 |\n 28697 | 2023-06-09 03:03:09 | MASTER-OAFA | (16h 16m 08.48s , +12d 08m 43.0s) | C | 180 | 18.8 |\n 28909 | 2023-06-09 03:06:40 | MASTER-OAFA | (16h 24m 16.91s , +12d 09m 52.5s) | C | 180 | 18.8 |\n 29119 | 2023-06-09 03:10:11 | MASTER-OAFA | (16h 11m 22.37s , +17d 51m 05.9s) | C | 180 | 18.9 |\n 29331 | 2023-06-09 03:13:42 | MASTER-OAFA | (16h 19m 51.02s , +17d 52m 10.5s) | C | 180 | 18.7 |\n 29541 | 2023-06-09 03:17:13 | MASTER-OAFA | (16h 27m 21.26s , +17d 52m 17.2s) | C | 180 | 18.6 |\n 29752 | 2023-06-09 03:20:44 | MASTER-OAFA | (16h 35m 52.73s , +17d 51m 03.9s) | C | 180 | 18.4 |\n 29964 | 2023-06-09 03:24:15 | MASTER-OAFA | (15h 57m 48.76s , +25d 27m 10.4s) | C | 180 | 18.5 |\n 30174 | 2023-06-09 03:27:46 | MASTER-OAFA | (16h 06m 39.41s , +25d 28m 17.1s) | C | 180 | 18.4 |\n 30386 | 2023-06-09 03:31:17 | MASTER-OAFA | (16h 27m 23.14s , +17d 50m 22.6s) | C | 180 | 18.5 |\n 30597 | 2023-06-09 03:34:48 | MASTER-OAFA | (16h 35m 51.35s , +17d 51m 29.1s) | C | 180 | 18.5 |\n 31051 | 2023-06-09 03:42:23 | MASTER-OAFA | (16h 06m 37.05s , +25d 28m 35.5s) | C | 180 | 18.4 |\n 31263 | 2023-06-09 03:45:54 | MASTER-OAFA | (15h 56m 46.50s , +27d 20m 45.9s) | C | 180 | 18.4 |\n 31504 | 2023-06-09 03:49:55 | MASTER-OAFA | (16h 05m 55.62s , +27d 20m 40.7s) | C | 180 | 18.4 |\n 32139 | 2023-06-09 04:00:30 | MASTER-OAFA | (15h 56m 46.30s , +27d 21m 32.2s) | C | 180 | 18.4 |\n 33144 | 2023-06-09 04:17:16 | MASTER-OAFA | (22h 30m 08.47s , -48d 51m 09.1s) | C | 180 | 17.8 |\n 33356 | 2023-06-09 04:20:48 | MASTER-OAFA | (22h 40m 55.72s , -48d 50m 33.9s) | C | 180 | 17.9 |\n 33990 | 2023-06-09 04:31:22 | MASTER-OAFA | (22h 30m 05.37s , -48d 51m 14.3s) | C | 180 | 17.8 |\n 34202 | 2023-06-09 04:34:54 | MASTER-OAFA | (22h 41m 01.83s , -48d 51m 14.2s) | C | 180 | 18.1 |\n 34624 | 2023-06-09 04:41:56 | MASTER-OAFA | (22h 59m 03.30s , -46d 56m 02.6s) | C | 180 | 18.0 |\n 34835 | 2023-06-09 04:45:27 | MASTER-OAFA | (23h 10m 33.70s , -46d 56m 54.8s) | C | 180 | 18.1 |\n 35432 | 2023-06-09 04:55:24 | MASTER-OAFA | (22h 59m 04.16s , -46d 57m 34.5s) | C | 180 | 18.1 |\n 36640 | 2023-06-09 05:15:32 | MASTER-OAFA | (22h 37m 01.29s , -46d 56m 51.1s) | C | 180 | 18.1 |\n 36852 | 2023-06-09 05:19:03 | MASTER-OAFA | (22h 48m 34.40s , -46d 55m 28.0s) | C | 180 | 18.0 |\n 37590 | 2023-06-09 05:31:21 | MASTER-OAFA | (22h 48m 32.01s , -46d 55m 10.5s) | C | 180 | 18.2 |\n 37802 | 2023-06-09 05:34:53 | MASTER-OAFA | (22h 34m 42.25s , -41d 14m 52.3s) | C | 180 | 17.6 |\n 38013 | 2023-06-09 05:38:24 | MASTER-OAFA | (22h 45m 22.09s , -41d 14m 55.5s) | C | 180 | 17.6 |\n 38224 | 2023-06-09 05:41:56 | MASTER-OAFA | (22h 02m 28.59s , -37d 25m 54.6s) | C | 180 | 17.7 |\n 38664 | 2023-06-09 05:49:15 | MASTER-OAFA | (22h 34m 43.28s , -41d 13m 46.4s) | C | 180 | 17.5 |\n 38875 | 2023-06-09 05:52:47 | MASTER-OAFA | (22h 45m 15.79s , -41d 12m 56.2s) | C | 180 | 17.6 |\n 39086 | 2023-06-09 05:56:18 | MASTER-OAFA | (22h 02m 32.07s , -37d 25m 06.0s) | C | 180 | 17.5 |\n 39297 | 2023-06-09 05:59:49 | MASTER-OAFA | (22h 12m 26.75s , -37d 26m 18.4s) | C | 180 | 17.5 |\n 39509 | 2023-06-09 06:03:20 | MASTER-OAFA | (21h 49m 39.75s , -35d 30m 14.7s) | C | 180 | 17.6 |\n 39719 | 2023-06-09 06:06:51 | MASTER-OAFA | (21h 59m 25.79s , -35d 31m 49.2s) | C | 180 | 17.5 |\n 39931 | 2023-06-09 06:10:22 | MASTER-OAFA | (21h 43m 26.57s , -37d 24m 40.9s) | C | 180 | 17.7 |\n 40344 | 2023-06-09 06:17:16 | MASTER-OAFA | (21h 49m 42.37s , -35d 30m 45.7s) | C | 180 | 17.6 |\n 40556 | 2023-06-09 06:20:47 | MASTER-OAFA | (21h 59m 22.80s , -35d 31m 56.5s) | C | 180 | 17.6 |\n 41187 | 2023-06-09 06:31:18 | MASTER-OAFA | (21h 58m 01.03s , -39d 17m 57.1s) | C | 180 | 17.7 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-09T06:41:03.286835Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-09T06:41:03.286855Z",
"modified": "2023-06-09T06:41:03.292939Z",
"nonlocalizedevents": [
{
"event_id": "S230608a"
}
],
"targets": []
},
{
"id": 210,
"topic": "gcn.circular",
"uuid": "dd4234b2-e2c1-4c2f-be66-b92d6b8c7868",
"title": "LIGO/Virgo S230609a: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/09 06:42:00 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33942",
"subject": "LIGO/Virgo S230609a: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230609a errorbox 151 sec after notice time and 195 sec after trigger time at 2023-06-09 01:11:39 UT, with upper limit up to 18.4 mag. The observations began at zenith distance = 68 deg. The sun altitude is -44.6 deg.\n\nThe galactic latitude b = 78 deg., longitude l = 183 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011978\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 215 | 2023-06-09 01:11:39 | MASTER-OAFA | (11h 58m 05.57s , +32d 24m 15.6s) | C | 40 | 16.6 |\n 292 | 2023-06-09 01:12:50 | MASTER-OAFA | (11h 58m 04.99s , +32d 25m 15.2s) | C | 50 | 16.8 |\n 383 | 2023-06-09 01:14:11 | MASTER-OAFA | (11h 58m 10.26s , +32d 24m 16.8s) | C | 70 | 17.3 |\n 494 | 2023-06-09 01:15:53 | MASTER-OAFA | (11h 58m 05.45s , +32d 23m 17.9s) | C | 90 | 17.3 |\n 626 | 2023-06-09 01:17:55 | MASTER-OAFA | (11h 58m 10.81s , +32d 23m 41.5s) | C | 110 | 17.3 |\n 783 | 2023-06-09 01:20:16 | MASTER-OAFA | (11h 58m 08.17s , +32d 24m 52.4s) | C | 140 | 17.3 |\n 9994 | 2023-06-09 03:53:27 | MASTER-OAFA | (22h 23m 05.32s , -50d 44m 59.6s) | C | 180 | 17.8 |\n 10205 | 2023-06-09 03:56:58 | MASTER-OAFA | (22h 35m 39.84s , -50d 43m 47.4s) | C | 180 | 17.8 |\n 10844 | 2023-06-09 04:07:38 | MASTER-OAFA | (22h 23m 08.57s , -50d 44m 10.4s) | C | 180 | 17.9 |\n 11422 | 2023-06-09 04:17:16 | MASTER-OAFA | (22h 30m 08.47s , -48d 51m 09.1s) | C | 180 | 17.8 |\n 11634 | 2023-06-09 04:20:48 | MASTER-OAFA | (22h 40m 55.72s , -48d 50m 33.9s) | C | 180 | 17.9 |\n 11845 | 2023-06-09 04:24:19 | MASTER-OAFA | (22h 52m 56.76s , -48d 49m 46.3s) | C | 180 | 18.2 |\n 12268 | 2023-06-09 04:31:22 | MASTER-OAFA | (22h 30m 05.37s , -48d 51m 14.3s) | C | 180 | 17.8 |\n 12480 | 2023-06-09 04:34:54 | MASTER-OAFA | (22h 41m 01.83s , -48d 51m 14.2s) | C | 180 | 18.1 |\n 12691 | 2023-06-09 04:38:24 | MASTER-OAFA | (22h 53m 00.37s , -48d 49m 53.3s) | C | 180 | 18.1 |\n 12902 | 2023-06-09 04:41:56 | MASTER-OAFA | (22h 59m 03.30s , -46d 56m 02.6s) | C | 180 | 18.0 |\n 13113 | 2023-06-09 04:45:27 | MASTER-OAFA | (23h 10m 33.70s , -46d 56m 54.8s) | C | 180 | 18.1 |\n 13324 | 2023-06-09 04:48:58 | MASTER-OAFA | (23h 03m 52.30s , -48d 50m 46.0s) | C | 180 | 18.3 |\n 13710 | 2023-06-09 04:55:24 | MASTER-OAFA | (22h 59m 04.16s , -46d 57m 34.5s) | C | 180 | 18.1 |\n 14072 | 2023-06-09 05:01:26 | MASTER-OAFA | (23h 03m 50.57s , -48d 51m 28.4s) | C | 180 | 18.4 |\n 14284 | 2023-06-09 05:04:57 | MASTER-OAFA | (23h 15m 56.06s , -48d 49m 51.2s) | C | 180 | 18.1 |\n 14495 | 2023-06-09 05:08:29 | MASTER-OAFA | (22h 46m 48.83s , -50d 43m 18.7s) | C | 180 | 18.3 |\n 14707 | 2023-06-09 05:12:00 | MASTER-OAFA | (22h 59m 25.32s , -50d 44m 30.6s) | C | 180 | 18.3 |\n 14918 | 2023-06-09 05:15:32 | MASTER-OAFA | (22h 37m 01.29s , -46d 56m 51.1s) | C | 180 | 18.1 |\n 15130 | 2023-06-09 05:19:03 | MASTER-OAFA | (22h 48m 34.40s , -46d 55m 28.0s) | C | 180 | 18.0 |\n 15341 | 2023-06-09 05:22:34 | MASTER-OAFA | (22h 46m 52.36s , -50d 44m 46.2s) | C | 180 | 18.3 |\n 15552 | 2023-06-09 05:26:06 | MASTER-OAFA | (22h 59m 26.25s , -50d 43m 53.7s) | C | 180 | 18.4 |\n 15868 | 2023-06-09 05:31:21 | MASTER-OAFA | (22h 48m 32.01s , -46d 55m 10.5s) | C | 180 | 18.2 |\n 16080 | 2023-06-09 05:34:53 | MASTER-OAFA | (22h 34m 42.25s , -41d 14m 52.3s) | C | 180 | 17.6 |\n 16291 | 2023-06-09 05:38:24 | MASTER-OAFA | (22h 45m 22.09s , -41d 14m 55.5s) | C | 180 | 17.6 |\n 16502 | 2023-06-09 05:41:56 | MASTER-OAFA | (22h 02m 28.59s , -37d 25m 54.6s) | C | 180 | 17.7 |\n 16942 | 2023-06-09 05:49:15 | MASTER-OAFA | (22h 34m 43.28s , -41d 13m 46.4s) | C | 180 | 17.5 |\n 17153 | 2023-06-09 05:52:47 | MASTER-OAFA | (22h 45m 15.79s , -41d 12m 56.2s) | C | 180 | 17.6 |\n 17364 | 2023-06-09 05:56:18 | MASTER-OAFA | (22h 02m 32.07s , -37d 25m 06.0s) | C | 180 | 17.5 |\n 17575 | 2023-06-09 05:59:49 | MASTER-OAFA | (22h 12m 26.75s , -37d 26m 18.4s) | C | 180 | 17.5 |\n 17787 | 2023-06-09 06:03:20 | MASTER-OAFA | (21h 49m 39.75s , -35d 30m 14.7s) | C | 180 | 17.6 |\n 17997 | 2023-06-09 06:06:51 | MASTER-OAFA | (21h 59m 25.79s , -35d 31m 49.2s) | C | 180 | 17.5 |\n 18209 | 2023-06-09 06:10:22 | MASTER-OAFA | (21h 43m 26.57s , -37d 24m 40.9s) | C | 180 | 17.7 |\n 18622 | 2023-06-09 06:17:16 | MASTER-OAFA | (21h 49m 42.37s , -35d 30m 45.7s) | C | 180 | 17.6 |\n 18834 | 2023-06-09 06:20:47 | MASTER-OAFA | (21h 59m 22.80s , -35d 31m 56.5s) | C | 180 | 17.6 |\n 19465 | 2023-06-09 06:31:18 | MASTER-OAFA | (21h 58m 01.03s , -39d 17m 57.1s) | C | 180 | 17.7 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-09T06:42:05.406914Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-09T06:42:05.406933Z",
"modified": "2023-06-09T06:42:05.413025Z",
"nonlocalizedevents": [
{
"event_id": "S230609a"
}
],
"targets": []
},
{
"id": 212,
"topic": "gcn.circular",
"uuid": "83ce68b4-fddc-41a6-8e70-7483a5bf8c8a",
"title": "LIGO/Virgo S230608as: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/09 06:50:34 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33943",
"subject": "LIGO/Virgo S230608as: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the LIGO/Virgo S230608as errorbox 4 sec after notice time and 53 sec after trigger time at 2023-06-08 20:51:40 UT, with upper limit up to 17.6 mag. The observations began at zenith distance = 85 deg. The sun altitude is -24.0 deg.\n\nThe galactic latitude b = -1 deg., longitude l = 150 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011968\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 59 | 2023-06-08 20:51:40 | MASTER-Kislovodsk | (04h 00m 18.64s , +51d 11m 35.3s) | C | 10 | 15.8 |\n 84 | 2023-06-08 20:51:40 | MASTER-Kislovodsk | (04h 00m 18.64s , +51d 11m 35.3s) | C | 60 | 16.9 | Coadd\n 314 | 2023-06-08 20:51:40 | MASTER-Kislovodsk | (04h 00m 18.64s , +51d 11m 35.7s) | C | 520 | 17.6 | Coadd\n 98 | 2023-06-08 20:52:14 | MASTER-Kislovodsk | (04h 00m 24.55s , +51d 10m 32.3s) | C | 20 | 16.1 |\n 146 | 2023-06-08 20:52:58 | MASTER-Kislovodsk | (04h 00m 19.41s , +51d 09m 28.1s) | C | 30 | 16.5 |\n 206 | 2023-06-08 20:53:52 | MASTER-Kislovodsk | (04h 00m 24.45s , +51d 09m 48.3s) | C | 40 | 16.5 |\n 261 | 2023-06-08 20:53:52 | MASTER-Kislovodsk | (04h 00m 24.46s , +51d 09m 47.9s) | C | 150 | 17.3 | Coadd\n 274 | 2023-06-08 20:54:56 | MASTER-Kislovodsk | (04h 00m 22.65s , +51d 10m 56.9s) | C | 50 | 16.6 |\n 353 | 2023-06-08 20:56:09 | MASTER-Kislovodsk | (04h 00m 22.41s , +51d 09m 37.0s) | C | 60 | 16.5 |\n 447 | 2023-06-08 20:57:33 | MASTER-Kislovodsk | (04h 00m 25.68s , +51d 11m 09.4s) | C | 80 | 15.5 |\n 562 | 2023-06-08 20:57:33 | MASTER-Kislovodsk | (04h 00m 25.68s , +51d 11m 09.8s) | C | 310 | 17.3 | Coadd\n 561 | 2023-06-08 20:59:17 | MASTER-Kislovodsk | (04h 00m 19.58s , +51d 10m 12.5s) | C | 100 | 16.5 |\n 700 | 2023-06-08 21:01:21 | MASTER-Kislovodsk | (04h 00m 18.72s , +51d 11m 13.5s) | C | 130 | 17.3 |\n 2639 | 2023-06-08 21:33:16 | MASTER-Kislovodsk | (04h 00m 33.02s , +51d 10m 45.1s) | C | 180 | 17.0 |\n 2819 | 2023-06-08 21:33:16 | MASTER-Kislovodsk | (04h 00m 33.03s , +51d 10m 44.7s) | C | 540 | 17.6 | Coadd\n 2844 | 2023-06-08 21:36:40 | MASTER-Kislovodsk | (04h 00m 26.26s , +51d 09m 39.2s) | C | 180 | 17.1 |\n 3048 | 2023-06-08 21:40:04 | MASTER-Kislovodsk | (04h 00m 33.94s , +51d 09m 56.9s) | C | 180 | 17.3 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-09T06:50:43.172780Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-09T06:50:43.172811Z",
"modified": "2023-06-09T06:50:43.179321Z",
"nonlocalizedevents": [
{
"event_id": "S230608a"
}
],
"targets": []
},
{
"id": 216,
"topic": "gcn.circular",
"uuid": "4a771ba4-8006-4399-a4fd-b959df61113f",
"title": "LIGO/Virgo/KAGRA S230609u: Identification of a GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "Kouji Nakamura <dr.kouji.nakamura@gmail.com>",
"data": {
"date": "23/06/09 07:45:34 GMT",
"from": "Kouji Nakamura <dr.kouji.nakamura@gmail.com>",
"title": "GCN CIRCULAR",
"number": "33944",
"subject": "LIGO/Virgo/KAGRA S230609u: Identification of a GW compact binary merger candidate"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the\nKAGRA Collaboration report:\n\nWe identified the compact binary merger candidate S230609u during\nreal-time processing of data from LIGO Hanford Observatory (H1) and\nLIGO Livingston Observatory (L1) at 2023-06-09 06:49:58.273 UTC (GPS\ntime: 1370328616.273). The candidate was found by the CWB [1], MBTA\n[2], GstLAL [3], PyCBC Live [4], and SPIIR [5] analysis pipelines.\n\nS230609u is an event of interest because its false alarm rate, as\nestimated by the online analysis, is 1e-08 Hz, or about one in 3\nyears. The event's properties can be found at this URL:\n\nhttps://gracedb.ligo.org/superevents/S230609u\n\nThe classification of the GW signal, in order of descending\nprobability, is BBH (96%), Terrestrial (4%), BNS (<1%), or NSBH (<1%).\n\nAssuming the candidate is astrophysical in origin, the probability\nthat the lighter compact object is consistent with a neutron star mass\n(HasNS) is <1%. [6] Using the masses and spins inferred from the\nsignal, the probability of matter outside the final compact object\n(HasRemnant) is <1%. [6] Both HasNS and HasRemnant consider the\nsupport of several neutron star equations of state. The probability\nthat any one of the binary components lie between 3 to 5 solar mass\n(HasMassgap) is <1%.\n\nTwo sky maps are available at this time and can be retrieved from the\nGraceDB event page:\n * bayestar.multiorder.fits,0, an initial localization generated by\nBAYESTAR [7], distributed via GCN notice about 26 seconds after the\ncandidate event time.\n * bayestar.multiorder.fits,1, an initial localization generated by\nBAYESTAR [7], distributed via GCN notice about 5 minutes after the\ncandidate event time.\n\nThe preferred sky map at this time is bayestar.multiorder.fits,1. For\nthe bayestar.multiorder.fits,1 sky map, the 90% credible region is\n1918 deg2. Marginalized over the whole sky, the a posteriori\nluminosity distance estimate is 2799 +/- 842 Mpc (a posteriori mean\n+/- standard deviation).\n\nFor further information about analysis methodology and the contents of\nthis alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide\n<https://emfollow.docs.ligo.org/userguide/>.\n\n [1] Klimenko et al. PRD 93, 042004 (2016)\n [2] Aubin et al. CQG 38, 095004 (2021)\n [3] Tsukada et al. arXiv:2305.06286 (2023) and Ewing et al.\narXiv:2305.05625 (2023)\n [4] Dal Canton et al. ApJ 923, 254 (2021)\n [5] Chu et al. PRD 105, 024023 (2022)\n [6] Chatterjee et al. ApJ 896, 54 (2020)\n [7] Singer & Price PRD 93, 024013 (2016)\n\n",
"published": "2023-06-09T07:45:43.542023Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-09T07:45:43.542052Z",
"modified": "2023-06-09T07:45:43.551175Z",
"nonlocalizedevents": [
{
"event_id": "S230609u"
}
],
"targets": []
},
{
"id": 217,
"topic": "gcn.circular",
"uuid": "d44d977d-8e37-40c4-8182-bf1856dbb960",
"title": "LIGO/Virgo S230608aw: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/09 08:52:29 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33945",
"subject": "LIGO/Virgo S230608aw: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230608aw errorbox 25858 sec after notice time and 25951 sec after trigger time at 2023-06-09 06:59:58 UT, with upper limit up to 18.2 mag. The observations began at zenith distance = 73 deg. The sun altitude is -56.6 deg.\n\nThe galactic latitude b = -86 deg., longitude l = 137 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011972\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 26041 | 2023-06-09 06:59:58 | MASTER-OAFA | (01h 19m 56.47s , -27d 55m 26.0s) | C | 180 | 17.8 |\n 26252 | 2023-06-09 07:03:29 | MASTER-OAFA | (01h 29m 03.55s , -27d 56m 18.9s) | C | 180 | 17.8 |\n 26464 | 2023-06-09 07:07:00 | MASTER-OAFA | (01h 02m 55.32s , -27d 57m 03.9s) | C | 180 | 18.2 |\n 26675 | 2023-06-09 07:10:31 | MASTER-OAFA | (01h 11m 53.05s , -27d 55m 38.2s) | C | 180 | 17.9 |\n 26886 | 2023-06-09 07:14:02 | MASTER-OAFA | (01h 19m 59.93s , -27d 57m 03.7s) | C | 180 | 17.5 |\n 27097 | 2023-06-09 07:17:34 | MASTER-OAFA | (01h 29m 03.27s , -27d 55m 22.0s) | C | 180 | 16.5 |\n 27308 | 2023-06-09 07:21:05 | MASTER-OAFA | (01h 02m 48.51s , -27d 56m 12.7s) | C | 180 | 17.8 |\n 27857 | 2023-06-09 07:30:14 | MASTER-OAFA | (01h 27m 35.81s , -26d 03m 02.0s) | C | 180 | 16.2 |\n 28068 | 2023-06-09 07:33:45 | MASTER-OAFA | (01h 01m 49.27s , -26d 02m 42.2s) | C | 180 | 15.7 |\n 28280 | 2023-06-09 07:37:16 | MASTER-OAFA | (01h 10m 43.97s , -26d 01m 26.8s) | C | 180 | 15.5 |\n 29314 | 2023-06-09 07:54:30 | MASTER-OAFA | (00h 44m 58.58s , -26d 01m 03.7s) | C | 180 | 17.8 |\n 29525 | 2023-06-09 07:58:02 | MASTER-OAFA | (00h 53m 50.54s , -26d 02m 43.5s) | C | 180 | 16.6 |\n 29737 | 2023-06-09 08:01:33 | MASTER-OAFA | (00h 44m 14.20s , -24d 07m 59.0s) | C | 180 | 17.5 |\n 30388 | 2023-06-09 08:12:24 | MASTER-OAFA | (00h 45m 00.84s , -26d 02m 54.2s) | C | 180 | 17.9 |\n 30920 | 2023-06-09 08:21:17 | MASTER-OAFA | (00h 44m 20.51s , -24d 07m 17.5s) | C | 180 | 17.3 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-09T08:52:38.106256Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-09T08:52:38.106290Z",
"modified": "2023-06-09T08:52:38.115182Z",
"nonlocalizedevents": [
{
"event_id": "S230608a"
}
],
"targets": []
},
{
"id": 2895,
"topic": "gcn.circular",
"uuid": "24593f7c-d4c7-4f8c-9ef9-43d8ee1efb43",
"title": "IPN triangulation of GRB 230911D (long)",
"submitter": "Hop gcn.circular",
"authors": "Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>",
"data": {
"date": "23/09/11 22:32:48 GMT",
"from": "Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>",
"title": "GCN CIRCULAR",
"number": "34669",
"subject": "IPN triangulation of GRB 230911D (long)"
},
"message_text": "A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin\non behalf of the HEND/Mars Odyssey team,\n\nD. Svinkin, D. Frederiks, A. Lysenko, A. Ridnaia,\nand T. Cline on behalf of the Konus-Wind team,\n\nA. Goldstein, M. S. Briggs, C. Wilson-Hodge,\nand E. Burns on behalf of the Fermi GBM team,\n\nE. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,\n\nS. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu\non behalf of the Swift-BAT team,\n\nand\n\nW. Boynton, C. Fellows, K. Harshman, H. Enos, R. Starr,\nand A.S. Gardner on on behalf of the GRS-Odyssey GRB team,\nreport:\n\nThe bright, short-duration GRB 230911D\n(Fermi-GBM detection: The Fermi GBM team, GCN Circ. 34656;\nBALROG localization: Biltzinger et al., GCN Circ. 34657;\nKonus-Wind detection: Frederiks et al., GCN Circ. 34659;\nFermi-LAT detection: Longo et al., GCN Circ. 34668)\nwas detected by Fermi (GBM trigger 716111594), INTEGRAL (SPI-ACS),\nKonus-Wind, Swift (BAT), and Mars-Odyssey (HEND)\nat about 28389 s UT (07:53:09).\nThe burst was outside the coded field of view of the BAT.\n\nWe have triangulated it to a preliminary, 3 sigma error box\nwhose coordinates are:\n ---------------------------------------------\n RA(2000), deg Dec(2000), deg\n ---------------------------------------------\n Center:\n 151.360 (10h 05m 26s) -25.633 (-25d 38' 00\")\n Corners:\n 151.696 (10h 06m 47s) -26.192 (-26d 11' 31\")\n 151.638 (10h 06m 33s) -26.200 (-26d 12' 01\")\n 151.036 (10h 04m 09s) -25.072 (-25d 04' 18\")\n 151.093 (10h 04m 22s) -25.064 (-25d 03' 51\")\n ---------------------------------------------\nThe error box area is 226 sq. arcmin, and its maximum\ndimension is 1.3 deg (the minimum one is 3 arcmin).\nThe Sun distance was 35 deg.\n\nThe IPN localization is consistent with, but reduces the area of,\nthe Fermi-LAT localization (GCN 34668).\n\nThis localization may be improved.\n\nA triangulation map and HEALPix FITS file are posted at\nhttp://www.ioffe.ru/LEA/GRBs/GRB230911_T28387/IPN\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjk0NDcxNTc0LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.Xqt5BpC85whOXDdxofuhvls7LSBm_75Km18Wmp1wVvQ\n\n",
"published": "2023-09-11T22:33:03.291433Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-09-11T22:33:03.291452Z",
"modified": "2023-09-11T22:33:03.296232Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 218,
"topic": "gcn.circular",
"uuid": "cabcc3aa-c94e-4c34-92f9-5336d8aca4bc",
"title": "GRB 230608A: AGILE detection",
"submitter": "Hop gcn.circular",
"authors": "Francesco Longo at U of Trieste,INFN Trieste <franzlongo1969@gmail.com>",
"data": {
"date": "23/06/09 11:20:47 GMT",
"from": "Francesco Longo at U of Trieste,INFN Trieste <franzlongo1969@gmail.com>",
"title": "GCN CIRCULAR",
"number": "33946",
"subject": "GRB 230608A: AGILE detection"
},
"message_text": "F. Longo (Univ. Trieste and INFN Trieste), F. Verrecchia, C. Pittori\n(SSDC, and INAF/OAR),\nM. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), C. Casentini (INAF/IAPS),\nA. Ursi (ASI and INAF/IAPS), A. Argan, M. Cardillo, Y. Evangelista, L. Foffano,\nG. Piano (INAF/IAPS), A. Addis, L. Baroncelli, A. Bulgarelli, G. Panebianco,\nA. Di Piano, V. Fioretti, N. Parmiggiani (INAF/OAS-Bologna), F.\nLucarelli (SSDC, and INAF/OAR),\nM. Marisaldi (INAF/OAS-Bologna, and Bergen University), M. Pilia, A.\nTrois (INAF/OA-Cagliari),\nI. Donnarumma, E. Menegoni (ASI), A. Giuliani (INAF/IASF-Mi), and P.\nTempesta (TeleSpazio)\nreport on behalf of the AGILE Team:\n\nThe AGILE satellite detected the GRB 230608A at T0 = 2023-06-08\n18:34:36 s (UTC),\ndetected also by INTEGRAL SPI-ACS (trigger no.10282).\n\nThe burst is clearly visible in the AGILE scientific ratemeters of the\nMiniCALorimeter (MCAL; 0.4-100 MeV), and AntiCoincidence (AC; 50-200 keV)\ndetectors.\n\nThe event lasted about 5 s and it released a total number\nof 3966 counts in the MCAL detector (above a background rate of 532 Hz)\nand 19256 counts in the AC-Top detector (above a background rate of 2875 Hz).\nThe AGILE ratemeters light curves can be found at\n\nhttp://www.agilescienceapp.it/notices/GRB230608A_AGILE_RM_ND.png\n\nAdditional analysis of AGILE data is in progress.\n\n",
"published": "2023-06-09T11:20:56.975149Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-09T11:20:56.975168Z",
"modified": "2023-06-09T11:20:56.983032Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 219,
"topic": "gcn.circular",
"uuid": "49ca7aca-de63-4dc3-b6c3-93341a0b42ee",
"title": "GRB 230608A: AstroSat CZTI detection",
"submitter": "Hop gcn.circular",
"authors": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"data": {
"date": "23/06/09 12:20:14 GMT",
"from": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"title": "GCN CIRCULAR",
"number": "33947",
"subject": "GRB 230608A: AstroSat CZTI detection"
},
"message_text": "\n\nP K. Navaneeth (IUCAA), G. Waratkar (IITB), A. Vibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (Ashoka University/IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:\n\nAnalysis of AstroSat CZTI data with the ML pipeline (Abraham et al., 2021, MNRAS, 504, 3084) and the CIFT framework (Sharma et al., 2021, JApA, 42, 73) showed the detection of a bright GRB 230608A which was also detected by CALET (ID Num. 1370284460), INTEGRAL SPI-ACS (Trig Num. 10282), and AGILE (Longo et al., GCN Circ. 33946).\n\nThe source was clearly detected in the 20-200 keV energy range. The light curve peaks at 2023-06-08 18:34:37.50 UTC. The measured peak count rate associated with the burst is 724 (+54, -54) counts/s above the background in the combined data of three quadrants (out of four), with a total of 3349 (+393, -345) counts. The local mean background count rate was 358 (+2, -3) counts/s. Using cumulative rates, we measure a T90 of 16 (+8, -8) s.\n\nThe source was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range. The light curve peaks at 2023-06-08 18:34:37.50 UTC. The measured peak count rate associated with the burst is 1210 (+85, -95) counts/s above the background in the combined data of all quadrants, with a total of 4297 (+722, -809) counts. The local mean background count rate was 1573 (+6, -7) counts/s. We measure a T90 of 7 (+7, -3) s from the cumulative Veto light curve.\n\nCZTI is built by a TIFR-led consortium of institutes across India, including VSSC, URSC, IUCAA, SAC, and PRL. The Indian Space Research Organisation funded, managed, and facilitated the project.\n\nCZTI GRB detections are reported regularly on the payload site at:\nhttp://astrosat.iucaa.in/czti/?q=grb\n\n",
"published": "2023-06-09T12:20:22.392280Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-09T12:20:22.392305Z",
"modified": "2023-06-09T12:20:22.398492Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 220,
"topic": "gcn.circular",
"uuid": "c04bba57-1912-4ee2-bb20-cb6e1f139535",
"title": "GRB 230608A: CALET Gamma-Ray Burst Monitor detection",
"submitter": "Hop gcn.circular",
"authors": "Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>",
"data": {
"date": "23/06/10 04:09:51 GMT",
"from": "Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>",
"title": "GCN CIRCULAR",
"number": "33948",
"subject": "GRB 230608A: CALET Gamma-Ray Burst Monitor detection"
},
"message_text": "K. Yamaoka (Nagoya U), A. Yoshida, T. Sakamoto,\nS. Sugita (AGU), Y. Kawakubo (LSU),\nS. Nakahira (JAXA), Y. Asaoka (ICRR),\nS. Torii, Y. Akaike, K. Kobayashi (Waseda U),\nY. Shimizu, T. Tamura (Kanagawa U), N. Cannady (GSFC/UMBC),\nM. L. Cherry (LSU), S. Ricciarini (U of Florence),\nP. S. Marrocchesi (U of Siena),\nand the CALET collaboration:\n\nThe long GRB 230608A (INTEGRAL SPI ACS Trigger #10282;\nAGILE detection: Longo et al., GCN Circ 33946; AstroSat CZTI\ndetection: Navaneeth et al., GCN Circ 33947) triggered the\nCALET Gamma-ray Burst Monitor (CGBM) at 18:34:33.392 UTC\non 8 June 2023\n(http://cgbm.calet.jp/cgbm_trigger/flight/1370284460/index.html).\nThe burst signal was seen by only the SGM detector.\n\nThe burst light curve shows a single pulse that starts\nat T+2.5 sec, peaks at T+3.3 sec, and ends at T+7.0 sec.\nThe T90 and T50 durations measured by the SGM data are\n3.9 +/- 0.4 sec and 1.6 +/- 0.4 sec (40-1000 keV), respectively.\n\nThe ground-processed light curve is available at\n\nhttp://cgbm.calet.jp/cgbm_trigger/ground/1370284460/\n\nThe CALET data used in this analysis are provided by\nthe Waseda CALET Operation Center located at Waseda University.\n\n",
"published": "2023-06-10T04:10:03.330104Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-10T04:10:03.330126Z",
"modified": "2023-06-10T04:10:03.338293Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 221,
"topic": "gcn.circular",
"uuid": "050c8015-4b4c-41f1-9ccd-2f0024866e50",
"title": "LIGO/Virgo S230609u: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/10 06:34:32 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33949",
"subject": "LIGO/Virgo S230609u: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the LIGO/Virgo S230609u errorbox 39392 sec after notice time and 39462 sec after trigger time at 2023-06-09 17:47:40 UT, with upper limit up to 18.5 mag. The observations began at zenith distance = 74 deg. The sun altitude is -26.1 deg.\n\nMASTER-OAFA robotic telescope located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230609u errorbox 58099 sec after notice time and 58169 sec after trigger time at 2023-06-09 22:59:27 UT, with upper limit up to 18.2 mag. Observations started at twilight. The observations began at zenith distance = 70 deg. The sun altitude is -16.8 deg.\n\nThe galactic latitude b = -17 deg., longitude l = 234 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011982\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 39553 | 2023-06-09 17:47:40 | MASTER-SAAO | (06h 31m 28.35s , -25d 17m 39.4s) | C | 180 | 18.5 |\n 39553 | 2023-06-09 17:47:40 | MASTER-SAAO | (06h 30m 41.01s , -25d 17m 37.0s) | C | 180 | 17.0 |\n 58259 | 2023-06-09 22:59:27 | MASTER-OAFA | (06h 10m 29.24s , -26d 46m 58.7s) | C | 180 | 17.6 |\n 58744 | 2023-06-09 23:07:31 | MASTER-OAFA | (06h 21m 14.48s , -24d 53m 39.3s) | C | 180 | 18.1 |\n 59325 | 2023-06-09 23:17:12 | MASTER-OAFA | (06h 34m 31.72s , -28d 40m 07.1s) | C | 180 | 18.2 |\n 59537 | 2023-06-09 23:20:44 | MASTER-OAFA | (06h 43m 40.53s , -28d 38m 44.4s) | C | 180 | 17.6 |\n 59755 | 2023-06-09 23:24:23 | MASTER-OAFA | (06h 32m 35.82s , -32d 29m 12.1s) | C | 180 | 17.8 |\n 60125 | 2023-06-09 23:30:33 | MASTER-OAFA | (06h 34m 33.29s , -28d 39m 18.4s) | C | 180 | 17.8 |\n 60337 | 2023-06-09 23:34:04 | MASTER-OAFA | (06h 43m 43.48s , -28d 40m 52.6s) | C | 180 | 17.8 |\n 60568 | 2023-06-09 23:37:55 | MASTER-OAFA | (06h 32m 42.22s , -32d 27m 43.6s) | C | 180 | 17.5 |\n 61559 | 2023-06-09 23:54:26 | MASTER-OAFA | (07h 00m 19.02s , -32d 26m 13.0s) | C | 180 | 17.8 |\n 62024 | 2023-06-10 00:02:11 | MASTER-OAFA | (06h 50m 49.87s , -32d 26m 25.3s) | C | 180 | 17.7 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-10T06:34:40.813431Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-10T06:34:40.813449Z",
"modified": "2023-06-10T06:34:40.822298Z",
"nonlocalizedevents": [
{
"event_id": "S230609u"
}
],
"targets": []
},
{
"id": 231,
"topic": "gcn.circular",
"uuid": "9bacfaeb-c913-467a-a03f-fb1bf05e47a7",
"title": "LIGO/Virgo S230611be: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/12 03:02:31 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33952",
"subject": "LIGO/Virgo S230611be: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230611be errorbox 21324 sec after notice time and 21387 sec after trigger time at 2023-06-12 02:50:50 UT, with upper limit up to 18.2 mag. The observations began at zenith distance = 72 deg. The sun altitude is -65.7 deg.\n\nThe galactic latitude b = -38 deg., longitude l = 34 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011996\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 21477 | 2023-06-12 02:50:50 | MASTER-OAFA | (20h 55m 38.59s , -18d 24m 45.8s) | C | 180 | 18.2 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-12T03:02:43.171734Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-12T03:02:43.171753Z",
"modified": "2023-06-12T03:02:43.180795Z",
"nonlocalizedevents": [
{
"event_id": "S230611b"
}
],
"targets": []
},
{
"id": 227,
"topic": "gcn.circular",
"uuid": "51423243-9b8b-4ec3-a699-2b4a98207097",
"title": "LIGO/Virgo/KAGRA S230609u: Updated Sky localization",
"submitter": "Hop gcn.circular",
"authors": "Aditya Vijaykumar <aditya.vijaykumar@ligo.org>",
"data": {
"date": "23/06/11 08:36:08 GMT",
"from": "Aditya Vijaykumar <aditya.vijaykumar@ligo.org>",
"title": "GCN CIRCULAR",
"number": "33950",
"subject": "LIGO/Virgo/KAGRA S230609u: Updated Sky localization"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:\n\nWe have conducted further analysis of the LIGO Hanford Observatory (H1) and LIGO Livingston Observatory (L1) data around the time of the compact binary merger (CBC) candidate S230609u (GCN Circular 33944). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.multiorder.fits,0, distributed via GCN Notice, is available for retrieval from the GraceDB event page:\n\nhttps://gracedb.ligo.org/superevents/S230609u\n\nFor the Bilby.multiorder.fits,0 sky map, the 90% credible region is 1287 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 3390 +/- 1125 Mpc (a posteriori mean +/- standard deviation).\n\nFor further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide <https://emfollow.docs.ligo.org/userguide/>.\n\n\n [1] Ashton et al. ApJS 241, 27 (2019)\n\n",
"published": "2023-06-11T08:36:20.609699Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-11T08:36:20.609716Z",
"modified": "2023-06-11T08:36:20.616779Z",
"nonlocalizedevents": [
{
"event_id": "S230609u"
}
],
"targets": []
},
{
"id": 228,
"topic": "gcn.circular",
"uuid": "d057cbe0-b004-4757-8341-2771fe48be1a",
"title": "LIGO/Virgo S230611l: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/11 13:26:32 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33951",
"subject": "LIGO/Virgo S230611l: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-Amur robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the LIGO/Virgo S230611l errorbox 23783 sec after notice time and 24454 sec after trigger time at 2023-06-11 13:08:47 UT, with upper limit up to 16.3 mag. Observations started at twilight. The observations began at zenith distance = 67 deg. The sun altitude is -10.5 deg.\n\nThe galactic latitude b = 60 deg., longitude l = 105 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011988\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 24545 | 2023-06-11 13:08:47 | MASTER-Amur | (04h 17m 31.84s , +62d 13m 55.0s) | C | 180 | 15.7 |\n 24744 | 2023-06-11 13:12:07 | MASTER-Amur | (04h 34m 29.03s , +62d 12m 17.2s) | C | 180 | 16.2 |\n 24944 | 2023-06-11 13:15:27 | MASTER-Amur | (03h 45m 00.64s , +62d 16m 31.6s) | C | 180 | 16.2 |\n 25144 | 2023-06-11 13:18:46 | MASTER-Amur | (04h 02m 11.81s , +62d 14m 41.2s) | C | 180 | 16.3 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-11T13:26:40.692894Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-11T13:26:40.692910Z",
"modified": "2023-06-11T13:26:40.700037Z",
"nonlocalizedevents": [
{
"event_id": "S230611l"
}
],
"targets": []
},
{
"id": 235,
"topic": "gcn.circular",
"uuid": "88b7115f-fd63-416c-8237-af84b77a335c",
"title": "LIGO/Virgo/KAGRA S230606d: Updated Sky localization",
"submitter": "Hop gcn.circular",
"authors": "Aditya Vijaykumar <aditya.vijaykumar@ligo.org>",
"data": {
"date": "23/06/12 17:37:21 GMT",
"from": "Aditya Vijaykumar <aditya.vijaykumar@ligo.org>",
"title": "GCN CIRCULAR",
"number": "33953",
"subject": "LIGO/Virgo/KAGRA S230606d: Updated Sky localization"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:\n\nWe have conducted further analysis of the LIGO Hanford Observatory (H1) and LIGO Livingston Observatory (L1) data around the time of the compact binary merger (CBC) candidate S230606d (GCN Circular 33922). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.offline1.multiorder.fits,0, distributed via GCN Notice, is available for retrieval from the GraceDB event page:\n\nhttps://gracedb.ligo.org/superevents/S230606d\n\nFor the Bilby.offline1.multiorder.fits,0 sky map, the 90% credible region is 1221 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 2545 +/- 874 Mpc (a posteriori mean +/- standard deviation).\n\nFor further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide <https://emfollow.docs.ligo.org/userguide/>.\n\n\n [1] Ashton et al. ApJS 241, 27 (2019)\n\n",
"published": "2023-06-12T17:37:34.656934Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-12T17:37:34.656952Z",
"modified": "2023-06-12T17:37:34.663200Z",
"nonlocalizedevents": [
{
"event_id": "S230606d"
}
],
"targets": []
},
{
"id": 237,
"topic": "gcn.circular",
"uuid": "f9ccc941-719c-4c9f-b16c-1be215265b27",
"title": "LIGO/Virgo/KAGRA S230608as: Updated Sky localization",
"submitter": "Hop gcn.circular",
"authors": "Aditya Vijaykumar <aditya.vijaykumar@ligo.org>",
"data": {
"date": "23/06/12 17:47:27 GMT",
"from": "Aditya Vijaykumar <aditya.vijaykumar@ligo.org>",
"title": "GCN CIRCULAR",
"number": "33954",
"subject": "LIGO/Virgo/KAGRA S230608as: Updated Sky localization"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:\n\nWe have conducted further analysis of the LIGO Hanford Observatory (H1) and LIGO Livingston Observatory (L1) data around the time of the compact binary merger (CBC) candidate S230608as (GCN Circular 33938). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.offline0.multiorder.fits,0, distributed via GCN Notice, is available for retrieval from the GraceDB event page:\n\nhttps://gracedb.ligo.org/superevents/S230608as\n\nFor the Bilby.offline0.multiorder.fits,0 sky map, the 90% credible region is 1694 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 3447 +/- 1079 Mpc (a posteriori mean +/- standard deviation).\n\nFor further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide <https://emfollow.docs.ligo.org/userguide/>.\n\n\n [1] Ashton et al. ApJS 241, 27 (2019)\n\n",
"published": "2023-06-12T17:47:36.749501Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-12T17:47:36.749526Z",
"modified": "2023-06-12T17:47:36.756175Z",
"nonlocalizedevents": [
{
"event_id": "S230608a"
}
],
"targets": []
},
{
"id": 238,
"topic": "gcn.circular",
"uuid": "c2c6e475-5c97-4da5-9e39-0553c7e0fe61",
"title": "IceCube-Cascade 230610A: Upper limits from a search for additional neutrino events in IceCube",
"submitter": "Hop gcn.circular",
"authors": "Sam Hori at IceCube/U Wisc-Madison <sahori@wisc.edu>",
"data": {
"date": "23/06/12 18:03:07 GMT",
"from": "Sam Hori at IceCube/U Wisc-Madison <sahori@wisc.edu>",
"title": "GCN CIRCULAR",
"number": "33955",
"subject": "IceCube-Cascade 230610A: Upper limits from a search for additional neutrino events in IceCube"
},
"message_text": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\n\nIceCube has performed a search [1] for additional track-like muon neutrino events arriving from the direction of IceCube-Cascade 230610A (https://gcn.gsfc.nasa.gov/notices_amon_icecube_cnascade/138035_55730330.amon<https://gcn.gsfc.nasa.gov/notices_amon_icecube_cascade/138035_55730330.amon>)\n\nin a time range of 1000 seconds centered on the alert event time (2023-06-10 23:51:15.570 UTC to 2023-06-11 00:07:55.570 UTC) during which IceCube was collecting good quality data. Excluding the event that prompted the alert, zero track-like events are found within the 90% containment region of IceCube-Cascade 230610A. The IceCube sensitivity to neutrino point sources with an E^-2.5 spectrum (E^2 dN/dE at 1 TeV) within the locations spanned by the 90% spatial containment region of IceCube-Cascade 230610A ranges from 1.3e-01 to 2.1e+00 GeV cm^-2 in a 1000 second time window. 90% of events IceCube would detect from a source at this declination with an E^-2.5 spectrum have energies in the approximate energy range between 2e+02 GeV and 1e+06 GeV.\n\n\nA subsequent search was performed including 2 days of data centered on the alert event time (2023-06-09 23:59:35.570 UTC to 2023-06-11 23:59:35.570 UTC). In this case, we report a p-value of 0.83, consistent with no significant excess of track events. The IceCube sensitivity to neutrino point sources with an E^-2.5 spectrum (E^2 dN/dE at 1 TeV) within the locations spanned by the 90% spatial containment region of IceCube-Cascade 230610A ranges from 1.5e-01 to 2.0e+00 GeV cm^-2 in a 2 day time window.\n\n\nThe IceCube Neutrino Observatory is a cubic-kilometer neutrino detector operating at the geographic South Pole, Antarctica. The IceCube realtime alert point of contact can be reached at roc@icecube.wisc.edu<mailto:roc@icecube.wisc.edu>.\n\n\n[1] IceCube Collaboration, R. Abbasi et al., ApJ 910 4 (2021)\n\n",
"published": "2023-06-12T18:03:16.325699Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-12T18:03:16.325717Z",
"modified": "2023-06-12T18:03:16.332242Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 239,
"topic": "gcn.circular",
"uuid": "5abb6a00-1caa-42a5-b65d-5ce63c4e80ff",
"title": "GRB 230606A: LCOGT Optical Observations",
"submitter": "Hop gcn.circular",
"authors": "Robert Strausbaugh at University of Minnesota <rstrausb@umn.edu>",
"data": {
"date": "23/06/13 14:33:09 GMT",
"from": "Robert Strausbaugh at University of Minnesota <rstrausb@umn.edu>",
"title": "GCN CIRCULAR",
"number": "33956",
"subject": "GRB 230606A: LCOGT Optical Observations"
},
"message_text": "R. Strausbaugh (University of Minnesota), A. Cucchiara (NASA) report on\nbehalf of a larger collaboration:\n\nWe observed the GRB 230606A (Lien et al., GCN 33921) field with the LCOGT\n1-meter Sinistro instrument at the McDonald Observatory, Texas, USA site,\non June 6, from 02:58 to 03:30 UT (corresponding to 2.73 to 3.27 hours from\nthe GRB trigger time) with the SDSS r and i filters.\n\nWe performed a series of 3x300s exposures in each band. We detect an\nuncataloged source within the Swift-XRT enhanced error region (Goad et al.,\nGCN 33924). Later time upper limits (Hu et al., GCN 33930) are consistent\nwith the fading of this source, suggesting that it is the optical\nafterglow; however, the later upper limit could be a result of the redness\nof this source.\n\nThe following magnitudes are calculated using the PanSTARRS catalog as\nreference:\n\nr > 20.95 +/- 0.06\ni > 19.66 +/- 0.04\n\nThese magnitudes are not corrected for galactic extinction.\n\n",
"published": "2023-06-13T14:33:19.447065Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-13T14:33:19.447097Z",
"modified": "2023-06-13T14:33:19.453625Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 244,
"topic": "gcn.circular",
"uuid": "5926ddef-3240-4686-9cb6-a1f434b0ec99",
"title": "GRB 230614A: Fermi GBM Final Real-time Localization",
"submitter": "Hop gcn.circular",
"authors": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"data": {
"date": "23/06/14 00:22:41 GMT",
"from": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"title": "GCN CIRCULAR",
"number": "33957",
"subject": "GRB 230614A: Fermi GBM Final Real-time Localization"
},
"message_text": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 00:12:15 UT on 14 Jun 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230614A (trigger 708394340.465878 / 230614009).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 131.6, Dec = 20.0 (J2000 degrees, equivalent to J2000 08h 46m, 20d 00'), with a statistical uncertainty of 7.4 degrees.\n\nThe angle from the Fermi LAT boresight is 64.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230614009/quicklook/glg_skymap_all_bn230614009.png\n\nThe HEALPix FITS file, including the estimated localization systematic, can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230614009/quicklook/glg_healpix_all_bn230614009.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230614009/quicklook/glg_lc_medres34_bn230614009.gif\n\n",
"published": "2023-06-14T00:22:54.649373Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-14T00:22:54.649393Z",
"modified": "2023-06-14T00:22:54.655411Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 245,
"topic": "gcn.circular",
"uuid": "ef694b43-ee0c-4cf5-bae2-7debaba2c4c3",
"title": "GRB 230614B: Fermi GBM Final Real-time Localization",
"submitter": "Hop gcn.circular",
"authors": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"data": {
"date": "23/06/14 09:25:31 GMT",
"from": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"title": "GCN CIRCULAR",
"number": "33958",
"subject": "GRB 230614B: Fermi GBM Final Real-time Localization"
},
"message_text": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 09:15:01 UT on 14 Jun 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230614B (trigger 708426906.627188 / 230614385).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 110.9, Dec = -61.9 (J2000 degrees, equivalent to J2000 07h 23m, -61d 53'), with a statistical uncertainty of 1.0 degrees.\n\nThe angle from the Fermi LAT boresight is 15.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230614385/quicklook/glg_skymap_all_bn230614385.png\n\nThe HEALPix FITS file, including the estimated localization systematic, can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230614385/quicklook/glg_healpix_all_bn230614385.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230614385/quicklook/glg_lc_medres34_bn230614385.gif\n\n",
"published": "2023-06-14T09:25:42.316271Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-14T09:25:42.316309Z",
"modified": "2023-06-14T09:25:42.324903Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 246,
"topic": "gcn.circular",
"uuid": "0910ebcf-0cdf-4143-8cdf-8b2c1e51b6ff",
"title": "Fermi trigger No 708426906: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/14 09:30:23 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33959",
"subject": "Fermi trigger No 708426906: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB230614.39 (trigger No 708426906,07h 23m 38.40s , -61d 52m 48.0s, R=1) errorbox 71 sec after notice time and 102 sec after trigger time at 2023-06-14 09:16:44 UT, with upper limit up to 17.6 mag. The observations began at zenith distance = 81 deg. The sun altitude is -27.8 deg.\n\nThe galactic latitude b = -20 deg., longitude l = 273 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"22633\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 113 | 2023-06-14 09:16:44 | MASTER-OAFA | (07h 22m 44.30s , -62d 09m 08.8s) | C | 20 | 16.8 |\n 148 | 2023-06-14 09:16:44 | MASTER-OAFA | (07h 22m 44.33s , -62d 09m 08.6s) | C | 90 | 17.6 | Coadd\n 169 | 2023-06-14 09:17:35 | MASTER-OAFA | (07h 22m 47.92s , -62d 07m 49.3s) | C | 30 | 17.0 |\n 236 | 2023-06-14 09:18:37 | MASTER-OAFA | (07h 22m 40.87s , -62d 08m 17.9s) | C | 40 | 17.0 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-14T09:30:29.600682Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-14T09:30:29.600715Z",
"modified": "2023-06-14T09:30:29.606170Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 5939,
"topic": "gcn.circular",
"uuid": "15f79f31-1b21-45fb-bf2b-27790467088d",
"title": "GRB 240128A: GRBAlpha detection",
"submitter": "Hop gcn.circular",
"authors": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"data": {
"date": "24/01/29 15:48:15 GMT",
"from": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/35649"
},
"title": "GCN CIRCULAR",
"number": "35649",
"subject": "GRB 240128A: GRBAlpha detection"
},
"message_text": "M. Dafcikova, J. Ripa (Masaryk U.), A. Pal (Konkoly Observatory), N. Werner (Masaryk U.), M. Ohno, H. Takahashi (Hiroshima U.), L. Meszaros, B. Csak (Konkoly Observatory), N. Husarikova, F. Munz , M. Topinka, M. Kolar, L. Szakszonova, J.-P. Breuer, F. Hroch (Masaryk U.), T. Urbanec, M. Kasal, A. Povalac (Brno U. of Technology), J. Hudec, J. Kapus, M. Frajt (Spacemanic s.r.o), R. Laszlo, M. Koleda (Needronix s.r.o), M. Smelko, P. Hanak, P. Lipovsky (Technical U. of Kosice), G. Galgoczi (Wigner Research Center/Eotvos U.), Y. Uchida, H. Poon, H. Matake (Hiroshima U.), N. Uchida (ISAS/JAXA), T. Bozoki (Eotvos U.), G. Dalya (Eotvos U.), T. Enoto (Kyoto U.), Zs. Frei (Eotvos U.), G. Friss (Eotvos U.), Y. Fukazawa, K. Hirose (Hiroshima U.), S. Hisadomi (Nagoya U.), Y. Ichinohe (Rikkyo U.), K. Kapas (Eotvos U.), L. L. Kiss (Konkoly Observatory), T. Mizuno (Hiroshima U.), K. Nakazawa (Nagoya U.), H. Odaka (Univ of Tokyo), J. Takatsy (Eotvos U.), K. Torigoe (Hiroshima U.), N. Kogiso, M. Yoneyama (Osaka Metropolitan U.), M. Moritaki (U. Tokyo), T. Kano (U. Michigan) -- the GRBAlpha collaboration.\n\nThe long-duration GRB 240128A (MAXI/GSC detection: GCN 35646; CALET/CGBM detection: GCN 35647; INTEGRAL/SPI-ACS trigger no. 10493) was observed by the GRBAlpha 1U CubeSat (Pal et al. 2023, A&A, 677, 40; arXiv:2302.10048).\n\nThe detection was confirmed at the peak time 2024-01-28 15:13:46 UTC. The T90 duration measured by GRBAlpha is 13 s and the overall significance during T90 reaches 8 sigma.\n\nThe light curve obtained by GRBAlpha is available here: https://grbalpha.konkoly.hu/static/share/GRB240128A_GCN.pdf\n\nAll GRBAlpha detections are listed at: https://monoceros.physics.muni.cz/hea/GRBAlpha/ \nGRBAlpha, launched on 2021 March 22, is a demonstration mission for a future CubeSat constellation (Werner et al. Proc. SPIE 2018). The detector of GRBAlpha consists of a 75 x 75 x 5 mm3 CsI scintillator read out by a SiPM array, covering the energy range from ~50 keV to ~1000 keV. To increase the duty cycle and the downlink rate, the upgrade of the on-board data acquisition software stack is in progress. The ground segment is also supported by the radio amateur community and it takes advantage of the SatNOGS network for increased data downlink volume. \n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35649.",
"published": "2024-01-29T15:48:32.217417Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-01-29T15:48:32.217446Z",
"modified": "2024-01-29T15:48:32.224966Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 262,
"topic": "gcn.circular",
"uuid": "c5291978-06f2-4467-ac93-53ae7ac427d7",
"title": "LIGO/Virgo S230615i: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/15 07:44:53 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33965",
"subject": "LIGO/Virgo S230615i: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230615i errorbox 204 sec after notice time and 260 sec after trigger time at 2023-06-15 07:31:12 UT, with upper limit up to 16.3 mag. The observations began at zenith distance = 78 deg. The sun altitude is -50.3 deg.\n\nThe galactic latitude b = 24 deg., longitude l = 67 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0012020\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 285 | 2023-06-15 07:31:12 | MASTER-OAFA | (18h 11m 09.70s , +40d 46m 37.6s) | C | 50 | 15.6 |\n 377 | 2023-06-15 07:32:33 | MASTER-OAFA | (18h 11m 09.55s , +40d 44m 43.5s) | C | 70 | 16.0 |\n 485 | 2023-06-15 07:34:16 | MASTER-OAFA | (18h 11m 11.92s , +40d 46m 20.9s) | C | 80 | 16.3 |\n 611 | 2023-06-15 07:36:08 | MASTER-OAFA | (18h 11m 05.25s , +40d 45m 43.9s) | C | 110 | 16.2 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-15T07:45:02.738839Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-15T07:45:02.738860Z",
"modified": "2023-06-15T07:45:02.743824Z",
"nonlocalizedevents": [
{
"event_id": "S230615i"
}
],
"targets": []
},
{
"id": 253,
"topic": "gcn.circular",
"uuid": "cfd147e5-f4b7-47b7-bdf4-d08fa0c51471",
"title": "GRB 230614B: Swift/BAT-GUANO detection outside the coded FOV",
"submitter": "Hop gcn.circular",
"authors": "Jimmy DeLaunay at University of Alabama <delauj2@gmail.com>",
"data": {
"date": "23/06/14 16:17:40 GMT",
"from": "Jimmy DeLaunay at University of Alabama <delauj2@gmail.com>",
"title": "GCN CIRCULAR",
"number": "33960",
"subject": "GRB 230614B: Swift/BAT-GUANO detection outside the coded FOV"
},
"message_text": "James DeLaunay (U Alabama), Samuele Ronchini (PSU), Gayathri Raman (PSU), Jamie A. Kennea (PSU), Aaron Tohuvavohu (U Toronto) report:\n\nSwift/BAT did not localize GRB 230614B onboard (T0: 2023-06-14T09:15:01 UTC, Fermi/GBM trig 708426906, GCN 33958)\n\nThe Fermi notice, distributed in near real-time, triggered the Swift Mission Operations Center operated Gamma-ray Urgent Archiver for Novel Opportunities (GUANO; Tohuvavohu et al. 2020, ApJ, 900, 1).\n\nUpon trigger by this notice, GUANO sent a command to the Swift Burst Alert Telescope (BAT) to save 200 seconds of BAT event-mode data from [-50,+150] seconds around the time of the burst. All the requested event mode data was delivered to the ground.\n\nThe BAT likelihood search, NITRATES (DeLaunay + Tohuvavohu 2022, ApJ, 941, 169), detects the burst with a sqrt(TS) of 16.18 in a 4.096 s analysis time bin.\nNITRATES results are consistent with a burst coming from outside the FOV, with DeltaLLHOut of 1.\nThe Fermi/GBM localization is consistent with being outside the BAT FOV (GCN 33958).\n\nSee Section 9.1 and Figures 10 and 17 in the NITRATES paper for brief descriptions and interpretation of sqrt(TS), DeltaLLHPeak, and DeltaLLHOut.\n\nGUANO is a fully autonomous, extremely low latency, spacecraft commanding pipeline designed for targeted recovery of BAT event mode data around the times of compelling astrophysical events to enable more sensitive GRB searches.\n\nA live reporting of Swift/BAT event data recovered by GUANO can be found at: https://www.swift.psu.edu/guano/\n\n",
"published": "2023-06-14T16:17:53.040120Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-14T16:17:53.040140Z",
"modified": "2023-06-14T16:17:53.045400Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 254,
"topic": "gcn.circular",
"uuid": "f84520e1-d769-40ae-b9d3-eee70087c878",
"title": "LIGO/Virgo S230614o: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/14 22:52:58 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33961",
"subject": "LIGO/Virgo S230614o: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230614o errorbox 32493 sec after notice time and 32683 sec after trigger time at 2023-06-14 22:41:08 UT, with upper limit up to 14.6 mag. Observations started at twilight. The observations began at zenith distance = 68 deg. The sun altitude is -13.0 deg.\n\nThe galactic latitude b = -2 deg., longitude l = 278 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0012008\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 32773 | 2023-06-14 22:41:08 | MASTER-OAFA | (06h 49m 48.49s , -13d 27m 33.2s) | C | 180 | 14.6 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-14T22:53:06.391397Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-14T22:53:06.391417Z",
"modified": "2023-06-14T22:53:06.397366Z",
"nonlocalizedevents": [
{
"event_id": "S230614o"
}
],
"targets": []
},
{
"id": 255,
"topic": "gcn.circular",
"uuid": "3e76f257-c998-42c3-9a61-593df56adc19",
"title": "LIGO/Virgo S230614t: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/14 22:53:05 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33962",
"subject": "LIGO/Virgo S230614t: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230614t errorbox 30018 sec after notice time and 30070 sec after trigger time at 2023-06-14 22:37:32 UT, with upper limit up to 14.6 mag. Observations started at twilight. The observations began at zenith distance = 69 deg. The sun altitude is -12.3 deg.\n\nThe galactic latitude b = -1 deg., longitude l = 224 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0012012\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 30160 | 2023-06-14 22:37:32 | MASTER-OAFA | (06h 41m 40.85s , -13d 27m 22.8s) | C | 180 | 12.5 |\n 30376 | 2023-06-14 22:41:08 | MASTER-OAFA | (06h 49m 48.49s , -13d 27m 33.2s) | C | 180 | 14.6 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-14T22:53:09.420470Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-14T22:53:09.420493Z",
"modified": "2023-06-14T22:53:09.425401Z",
"nonlocalizedevents": [
{
"event_id": "S230614t"
}
],
"targets": []
},
{
"id": 256,
"topic": "gcn.circular",
"uuid": "62678815-04f5-474f-8dba-b59b0331fc47",
"title": "LIGO/Virgo S230614ac: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/15 00:06:37 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33963",
"subject": "LIGO/Virgo S230614ac: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230614ac errorbox 28630 sec after notice time and 28683 sec after trigger time at 2023-06-14 23:55:54 UT, with upper limit up to 16.6 mag. The observations began at zenith distance = 68 deg. The sun altitude is -28.4 deg.\n\nThe galactic latitude b = 20 deg., longitude l = 303 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0012018\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 28774 | 2023-06-14 23:55:54 | MASTER-OAFA | (16h 23m 52.39s , +14d 02m 19.7s) | C | 180 | 16.6 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-15T00:06:46.758271Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-15T00:06:46.758294Z",
"modified": "2023-06-15T00:06:46.765297Z",
"nonlocalizedevents": [
{
"event_id": "S230614a"
}
],
"targets": []
},
{
"id": 257,
"topic": "gcn.circular",
"uuid": "af5b840c-ad5a-47ba-a9e4-81b2db78c72c",
"title": "LIGO/Virgo S230613at: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/15 00:24:44 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33964",
"subject": "LIGO/Virgo S230613at: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230613at errorbox 1 days 7468 sec after notice time and 1 days 7549 sec after trigger time at 2023-06-14 23:59:27 UT, with upper limit up to 17.0 mag. The observations began at zenith distance = 41 deg. The sun altitude is -29.2 deg.\n\nThe galactic latitude b = 41 deg., longitude l = 278 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011998\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 94039 | 2023-06-14 23:59:27 | MASTER-OAFA | (10h 43m 20.54s , -04d 55m 21.8s) | C | 180 | 16.4 |\n 94468 | 2023-06-15 00:06:35 | MASTER-OAFA | (10h 35m 15.29s , -04d 55m 16.1s) | C | 180 | 17.0 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-15T00:24:53.174849Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-15T00:24:53.174870Z",
"modified": "2023-06-15T00:24:53.181802Z",
"nonlocalizedevents": [
{
"event_id": "S230613a"
}
],
"targets": []
},
{
"id": 263,
"topic": "gcn.circular",
"uuid": "9fa5a97c-2dba-4352-9b76-b83639b1ff65",
"title": "GRB 230614C: Fermi GBM Detection",
"submitter": "Hop gcn.circular",
"authors": "R. Hamburg at CNRS/IJCLab <rachel.k.hamburg@gmail.com>",
"data": {
"date": "23/06/15 08:25:05 GMT",
"from": "R. Hamburg at CNRS/IJCLab <rachel.k.hamburg@gmail.com>",
"title": "GCN CIRCULAR",
"number": "33966",
"subject": "GRB 230614C: Fermi GBM Detection"
},
"message_text": "S. Lesage (UAH), R. Hamburg (CNRS/ICJLab) and C. Meegan (UAH) report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"At 10:10:31 UT on 14 June 2023, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 230614C (trigger 708430236/230614424) which\nwas also detected by INTEGRAL SPI-ACS (trigger 10284).\n\nThe on-ground calculated location, using the Fermi GBM trigger data,\nis RA = 229.21, Dec = 10.30 (J2000 degrees, equivalent to\nJ2000 15h 16m, +10d 18'), with a statistical uncertainty of 1.00 degree\n(radius, 1-sigma containment, statistical only; there is additionally a systematic error\nwhich we have characterized as a core-plus-tail model, with 90% of GRBs having a\n3.7 deg error and a small tail suffering a larger than 10 deg systematic error\n[Connaughton et al. 2015, ApJS, 216, 32]).\n\nThe angle from the Fermi LAT boresight is 108 degrees.\n\nThe GBM light curve consists of a single emission episode with a duration (T90)\nof about 6.1 s (50-300 keV). The time-averaged spectrum\nfrom T0+0.003 to T0+7.488 s is best fit by\na Band function with Epeak = 196 +/- 7 keV,\nalpha = -0.50 +/- 0.04, and beta = -2.44 +/- 0.08.\n\nThe event fluence (10-1000 keV) in this time interval is\n(4.04 +/- 0.06)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+1.8 s in the 10-1000 keV band is 32.6 +/- 0.5 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog:\nhttps://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html\n\nFor Fermi GBM data and info, please visit the official Fermi GBM Support Page:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"\n\n",
"published": "2023-06-15T08:25:14.015735Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-15T08:25:14.015767Z",
"modified": "2023-06-15T08:25:14.024736Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 272,
"topic": "gcn.circular",
"uuid": "d2f48bfd-7eec-401d-a347-7fd74ae9450a",
"title": "GRB 230614B: Fermi GBM Observation",
"submitter": "Hop gcn.circular",
"authors": "R. Hamburg at CNRS/IJCLab <rachel.k.hamburg@gmail.com>",
"data": {
"date": "23/06/15 14:01:13 GMT",
"from": "R. Hamburg at CNRS/IJCLab <rachel.k.hamburg@gmail.com>",
"title": "GCN CIRCULAR",
"number": "33967",
"subject": "GRB 230614B: Fermi GBM Observation"
},
"message_text": "R. Hamburg (CNRS/IJCLab) and C. Meegan (UAH)\nreport on behalf of the Fermi GBM Team:\n\n\"At 09:15:01.63 UT on 14 June 2023, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 230614B (trigger 708426906 / 230614385),\nwhich was also detected by Swift/BAT-GUANO (DeLaunay et al. 2023, GCN 33960).\nThe Fermi GBM Final Real-time Localization was reported in GCN 33958.\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 15 degrees.\n\nThe GBM light curve consists of two main pulses with a duration (T90)\nof about 15 s (50-300 keV). The time-averaged spectrum from T0-2.43 s\nto T0+18.05 s is best fit by a power law function with an exponential\nhigh-energy cutoff. The power law index is -1.18 +/- 0.05 and\nthe cutoff energy, parameterized as Epeak, is 115 +/- 6 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(5.94 +/- 0.16)E-06 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+1.47 s in the 10-1000 keV band\nis 10.3 +/- 0.3 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog:\nhttps://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html\n\nFor Fermi GBM data and info, please visit the official Fermi GBM Support Page:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"\n\n",
"published": "2023-06-15T14:01:23.329800Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-15T14:01:23.329833Z",
"modified": "2023-06-15T14:01:23.335275Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 273,
"topic": "gcn.circular",
"uuid": "9c2ed987-729a-4dd8-9c96-98bf65000076",
"title": "LIGO/Virgo S230615t: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/15 15:58:41 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33968",
"subject": "LIGO/Virgo S230615t: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-Tunka robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the LIGO/Virgo S230615t errorbox 19512 sec after notice time and 19556 sec after trigger time at 2023-06-15 15:47:25 UT, with upper limit up to 15.3 mag. Observations started at twilight. The observations began at zenith distance = 23 deg. The sun altitude is -13.6 deg.\n\nThe galactic latitude b = 31 deg., longitude l = 264 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0012030\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 19647 | 2023-06-15 15:47:25 | MASTER-Tunka | (15h 18m 33.21s , +72d 53m 34.3s) | C | 180 | 15.3 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-15T15:58:55.302172Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-15T15:58:55.302194Z",
"modified": "2023-06-15T15:58:55.308801Z",
"nonlocalizedevents": [
{
"event_id": "S230615t"
}
],
"targets": []
},
{
"id": 296,
"topic": "gcn.circular",
"uuid": "3992fcdf-3f83-4ace-a1a3-4447a0863d02",
"title": "LIGO/Virgo S230616j: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/16 06:53:34 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33975",
"subject": "LIGO/Virgo S230616j: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230616j errorbox 10 sec after notice time and 139 sec after trigger time at 2023-06-16 04:26:33 UT, with upper limit up to 19.2 mag. The observations began at zenith distance = 71 deg. The sun altitude is -82.1 deg.\n\nThe galactic latitude b = -56 deg., longitude l = 240 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0012062\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 229 | 2023-06-16 04:26:33 | MASTER-OAFA | (13h 22m 12.19s , +09d 26m 42.0s) | C | 180 | 19.1 |\n 647 | 2023-06-16 04:33:31 | MASTER-OAFA | (13h 01m 51.41s , -09d 34m 12.2s) | C | 180 | 19.2 |\n 1052 | 2023-06-16 04:40:16 | MASTER-OAFA | (13h 10m 01.51s , -09d 32m 40.2s) | C | 180 | 19.3 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-16T06:53:43.905225Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-16T06:53:43.905252Z",
"modified": "2023-06-16T06:53:43.912305Z",
"nonlocalizedevents": [
{
"event_id": "S230616j"
}
],
"targets": []
},
{
"id": 297,
"topic": "gcn.circular",
"uuid": "98783133-b521-4994-9d7a-d5d36ad75d82",
"title": "LIGO/Virgo S230615af: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/16 06:55:04 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33976",
"subject": "LIGO/Virgo S230615af: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230615af errorbox 57882 sec after notice time and 57927 sec after trigger time at 2023-06-16 04:59:37 UT, with upper limit up to 19.1 mag. The observations began at zenith distance = 68 deg. The sun altitude is -80.6 deg.\n\nThe galactic latitude b = 3 deg., longitude l = 94 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0012032\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 58017 | 2023-06-16 04:59:37 | MASTER-OAFA | (13h 13m 03.13s , -13d 22m 17.5s) | C | 180 | 19.1 |\n 59033 | 2023-06-16 05:16:33 | MASTER-OAFA | (13h 13m 02.95s , -13d 21m 33.4s) | C | 180 | 19.0 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-16T06:55:09.059760Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-16T06:55:09.059780Z",
"modified": "2023-06-16T06:55:09.064970Z",
"nonlocalizedevents": [
{
"event_id": "S230615a"
}
],
"targets": []
},
{
"id": 298,
"topic": "gcn.circular",
"uuid": "26c3bae1-81f9-451d-9dd7-2665e1f87f3b",
"title": "LIGO/Virgo S230615be: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/16 06:55:36 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33977",
"subject": "LIGO/Virgo S230615be: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230615be errorbox 40028 sec after notice time and 40102 sec after trigger time at 2023-06-16 05:08:48 UT, with upper limit up to 18.7 mag. The observations began at zenith distance = 58 deg. The sun altitude is -79.3 deg.\n\nThe galactic latitude b = 61 deg., longitude l = 124 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0012056\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 40192 | 2023-06-16 05:08:48 | MASTER-OAFA | (13h 10m 19.93s , -47d 33m 23.2s) | C | 180 | 18.7 |\n 40425 | 2023-06-16 05:12:41 | MASTER-OAFA | (13h 22m 21.51s , -47d 31m 52.1s) | C | 180 | 18.5 |\n 41121 | 2023-06-16 05:24:16 | MASTER-OAFA | (13h 10m 22.94s , -47d 32m 54.0s) | C | 180 | 18.7 |\n 41584 | 2023-06-16 05:31:59 | MASTER-OAFA | (13h 22m 17.37s , -47d 32m 19.2s) | C | 180 | 18.4 |\n 43011 | 2023-06-16 05:55:47 | MASTER-OAFA | (13h 36m 49.46s , -53d 15m 59.2s) | C | 180 | 18.1 |\n 43492 | 2023-06-16 06:03:48 | MASTER-OAFA | (13h 26m 15.43s , -51d 22m 26.9s) | C | 180 | 18.4 |\n 43755 | 2023-06-16 06:08:10 | MASTER-OAFA | (13h 17m 31.84s , -49d 28m 13.6s) | C | 180 | 18.3 |\n 44082 | 2023-06-16 06:13:37 | MASTER-OAFA | (13h 29m 55.36s , -49d 26m 35.1s) | C | 180 | 18.3 |\n 44313 | 2023-06-16 06:17:29 | MASTER-OAFA | (13h 26m 20.02s , -51d 21m 33.4s) | C | 180 | 18.2 |\n 44757 | 2023-06-16 06:24:52 | MASTER-OAFA | (13h 17m 33.10s , -49d 28m 35.4s) | C | 180 | 18.0 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-16T06:55:40.309668Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-16T06:55:40.309702Z",
"modified": "2023-06-16T06:55:40.315268Z",
"nonlocalizedevents": [
{
"event_id": "S230615b"
}
],
"targets": []
},
{
"id": 284,
"topic": "gcn.circular",
"uuid": "306b7c62-2671-491b-8f02-f188724811c0",
"title": "GRB 230614C: AstroSat CZTI detection",
"submitter": "Hop gcn.circular",
"authors": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"data": {
"date": "23/06/15 18:30:32 GMT",
"from": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"title": "GCN CIRCULAR",
"number": "33969",
"subject": "GRB 230614C: AstroSat CZTI detection"
},
"message_text": "P K. Navaneeth (IUCAA), G. Waratkar (IITB), A. Vibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (Ashoka University/IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:\n\nAnalysis of AstroSat CZTI data with the CIFT framework (Sharma et al., 2021, JApA, 42, 73) showed the detection of a long GRB 230614C which was also detected by Fermi GBM (Lesage et al., GCN Circ. 33966), and INTEGRAL SPI-ACS (Trigger 10284).\n\nThe source was clearly detected in the 20-200 keV energy range. The light curve peaks at 2023-06-14 10:10:33.25 UTC. The measured peak count rate associated with the burst is 2133 (+308, -123) counts/s above the background in the combined data of all quadrants, with a total of 5394 (+562, -588) counts. The local mean background count rate was 456 (+9, -12) counts/s. Using cumulative rates, we measure a T90 of 5.1 (+1.3, -1.2) s. In the preliminary analysis, we find 423 Compton events associated with this event.\n\nThe source was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range. The light curve peaks at 2023-06-14 10:10:33.25 UTC. The measured peak count rate associated with the burst is 2148 (+98, -105) counts/s above the background in the combined data of all quadrants, with a total of 5536 (+476, -514) counts. The local mean background count rate was 1459 (+7, -8) counts/s. We measure a T90 of 5.2 (+4.1, -1.5) s from the cumulative Veto light curve.\n\nCZTI is built by a TIFR-led consortium of institutes across India, including VSSC, URSC, IUCAA, SAC, and PRL. The Indian Space Research Organisation funded, managed, and facilitated the project.\n\nCZTI GRB detections are reported regularly on the payload site at:\nhttp://astrosat.iucaa.in/czti/?q=grb\n\n",
"published": "2023-06-15T18:30:41.978079Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-15T18:30:41.978099Z",
"modified": "2023-06-15T18:30:41.984129Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 289,
"topic": "gcn.circular",
"uuid": "53c6405e-0dce-45e9-9a21-0788ce8e1118",
"title": "LIGO/Virgo S230615k: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/15 22:47:02 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33970",
"subject": "LIGO/Virgo S230615k: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230615k errorbox 53729 sec after notice time and 53782 sec after trigger time at 2023-06-15 22:33:33 UT, with upper limit up to 17.7 mag. Observations started at twilight. The observations began at zenith distance = 48 deg. The sun altitude is -11.4 deg.\n\nThe galactic latitude b = 71 deg., longitude l = 192 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0012026\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 53873 | 2023-06-15 22:33:33 | MASTER-OAFA | (13h 03m 20.61s , +11d 23m 55.0s) | C | 180 | 17.7 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-15T22:47:11.555947Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-15T22:47:11.555968Z",
"modified": "2023-06-15T22:47:11.562257Z",
"nonlocalizedevents": [
{
"event_id": "S230615k"
}
],
"targets": []
},
{
"id": 290,
"topic": "gcn.circular",
"uuid": "05102034-1900-4e5a-8aa9-46ecfdb1f2ab",
"title": "LIGO/Virgo S230615ax: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/15 22:48:05 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33971",
"subject": "LIGO/Virgo S230615ax: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230615ax errorbox 21647 sec after notice time and 21809 sec after trigger time at 2023-06-15 22:33:33 UT, with upper limit up to 17.7 mag. Observations started at twilight. The observations began at zenith distance = 48 deg. The sun altitude is -11.4 deg.\n\nThe galactic latitude b = -16 deg., longitude l = 151 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0012048\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 21900 | 2023-06-15 22:33:33 | MASTER-OAFA | (13h 03m 20.61s , +11d 23m 55.0s) | C | 180 | 17.7 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-15T22:48:10.661331Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-15T22:48:10.661351Z",
"modified": "2023-06-15T22:48:10.666246Z",
"nonlocalizedevents": [
{
"event_id": "S230615a"
}
],
"targets": []
},
{
"id": 291,
"topic": "gcn.circular",
"uuid": "1dec8693-73c0-443c-a81f-9be1245c1a8b",
"title": "LIGO/Virgo S230615az: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/15 22:48:27 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33972",
"subject": "LIGO/Virgo S230615az: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230615az errorbox 16917 sec after notice time and 17005 sec after trigger time at 2023-06-15 22:33:33 UT, with upper limit up to 17.7 mag. Observations started at twilight. The observations began at zenith distance = 48 deg. The sun altitude is -11.4 deg.\n\nThe galactic latitude b = -65 deg., longitude l = 264 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0012054\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 17096 | 2023-06-15 22:33:33 | MASTER-OAFA | (13h 03m 20.61s , +11d 23m 55.0s) | C | 180 | 17.7 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-15T22:48:29.715137Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-15T22:48:29.715157Z",
"modified": "2023-06-15T22:48:29.719967Z",
"nonlocalizedevents": [
{
"event_id": "S230615a"
}
],
"targets": []
},
{
"id": 292,
"topic": "gcn.circular",
"uuid": "b726335d-d94c-4fa7-bde9-83d92e4470b4",
"title": "LIGO/Virgo S230615av: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/15 23:12:41 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33973",
"subject": "LIGO/Virgo S230615av: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230615av errorbox 23484 sec after notice time and 23534 sec after trigger time at 2023-06-15 22:40:40 UT, with upper limit up to 18.6 mag. Observations started at twilight. The observations began at zenith distance = 48 deg. The sun altitude is -12.9 deg.\n\nThe galactic latitude b = 19 deg., longitude l = 356 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0012046\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 23624 | 2023-06-15 22:40:40 | MASTER-OAFA | (13h 11m 22.48s , +11d 23m 59.1s) | C | 180 | 18.6 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-15T23:12:50.199165Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-15T23:12:50.199186Z",
"modified": "2023-06-15T23:12:50.205448Z",
"nonlocalizedevents": [
{
"event_id": "S230615a"
}
],
"targets": []
},
{
"id": 293,
"topic": "gcn.circular",
"uuid": "53ab81a3-1b79-4ffa-9aa6-3c9cfe1498d5",
"title": "LIGO/Virgo/KAGRA S230615az: GROWTH-India candidates",
"submitter": "Hop gcn.circular",
"authors": "Vishwajeet Swain at IIT Bombay <vishwajeet.s@iitb.ac.in>",
"data": {
"date": "23/06/15 23:47:06 GMT",
"from": "Vishwajeet Swain at IIT Bombay <vishwajeet.s@iitb.ac.in>",
"title": "GCN CIRCULAR",
"number": "33974",
"subject": "LIGO/Virgo/KAGRA S230615az: GROWTH-India candidates"
},
"message_text": "H. Kumar (IITB), V. Swain (IITB), A. Salgundi (IITB), K. Angail (IAO), V. Bhalerao (IITB), G. C. Anupama (IIA), S. Barway (IIA) report on behalf of the GIT team:\n\nWe followed up the sky localisation of the gravitational wave trigger S230615az with the 0.7m GROWTH-India telescope. We obtained multiple 300-sec exposures in the r' filter starting at 2023-06-15T17:56:40 UT, 6.55 minutes after the trigger. By targeting galaxies in the region, we covered 0.4% of the source probability on the sky, based on the \"bayestar.multiorder.fits,1\" map. After performing image subtraction, vetting, and a cross-check with minor planet centre, we obtained the following two transient candidates within the 90% localisation region of the event:\n\n|--------------|----------------|-------------|-------------|--------|----------------|\n| Name | JD | RA(J2000) | Dec(J2000) | Filter | Mag (AB) |\n|--------------|----------------|-------------|-------------|--------|----------------|\n| GIT230615aa | 2460111.271145 | 12:50:03.64 | 20:53:21.77 | r' | 20.05 +/- 0.06 |\n| GIT230615ab | 2460111.286931 | 12:42:11.65 | 22:03:25.08 | r' | 19.81 +/- 0.05 |\n|--------------|----------------|-------------|-------------|--------|----------------|\n\nGIT230615aa was detected in two images separated by 17 minutes. There is no significant fading between the two images. We could not get a second confirmation image for GIT230615ab as the source was set soon after the first image.\n\nThe magnitudes are calibrated against PanSTARRS DR1 (Chambers et al., 2016) and not corrected for Galactic extinction.\n\nThe GROWTH India Telescope (GIT) is a 70-cm telescope with a 0.7-degree field of view, set up by the Indian Institute of Astrophysics (IIA) and the Indian Institute of Technology Bombay (IITB) with funding from DST-SERB and IUSSTF. It is located at the Indian Astronomical Observatory (Hanle), operated by IIA. We acknowledge funding by the IITB alumni batch of 1994, which partially supports the operations of the telescope. Telescope technical details are available at https://sites.google.com/view/growthindia/.\n\n",
"published": "2023-06-15T23:47:15.979576Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-15T23:47:15.979595Z",
"modified": "2023-06-15T23:47:15.987203Z",
"nonlocalizedevents": [
{
"event_id": "S230615a"
}
],
"targets": []
},
{
"id": 301,
"topic": "gcn.circular",
"uuid": "b15f60d8-dd72-4c4e-a4f1-8a9a36ffc515",
"title": "LIGO/Virgo S230616s: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/16 07:35:04 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33978",
"subject": "LIGO/Virgo S230616s: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230616s errorbox 103 sec after notice time and 201 sec after trigger time at 2023-06-16 07:20:50 UT, with upper limit up to 16.9 mag. The observations began at zenith distance = 35 deg. The sun altitude is -52.6 deg.\n\nThe galactic latitude b = -5 deg., longitude l = 36 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0012064\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 164 | 2023-06-16 07:19:57 | MASTER- | (19h 13m 58.68s , +01d 13m 41.9s) | C | 30 | 15.4 |\n 218 | 2023-06-16 07:20:47 | MASTER- | (19h 13m 58.59s , +01d 14m 51.4s) | C | 40 | 15.3 |\n 221 | 2023-06-16 07:20:50 | MASTER-OAFA | (19h 11m 54.62s , +00d 03m 31.0s) | C | 40 | 16.9 |\n 283 | 2023-06-16 07:21:47 | MASTER- | (19h 14m 04.32s , +01d 13m 09.4s) | C | 50 | 15.1 |\n 358 | 2023-06-16 07:22:57 | MASTER- | (19h 13m 57.48s , +01d 12m 27.8s) | C | 60 | 14.8 |\n 448 | 2023-06-16 07:24:16 | MASTER- | (19h 14m 04.35s , +01d 12m 20.5s) | C | 80 | 15.4 |\n 558 | 2023-06-16 07:25:56 | MASTER- | (19h 14m 01.44s , +01d 13m 48.1s) | C | 100 | 15.4 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-06-16T07:35:12.968274Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-16T07:35:12.968316Z",
"modified": "2023-06-16T07:35:12.974678Z",
"nonlocalizedevents": [
{
"event_id": "S230616s"
}
],
"targets": []
},
{
"id": 305,
"topic": "gcn.circular",
"uuid": "fb381915-c571-4fed-ad6b-b24164cc4138",
"title": "LIGO/Virgo/KAGRA S230615az: GOTO candidate counterparts",
"submitter": "Hop gcn.circular",
"authors": "Ben Gompertz at U of Birmingham <b.gompertz@bham.ac.uk>",
"data": {
"date": "23/06/16 15:47:29 GMT",
"from": "Ben Gompertz at U of Birmingham <b.gompertz@bham.ac.uk>",
"title": "GCN CIRCULAR",
"number": "33979",
"subject": "LIGO/Virgo/KAGRA S230615az: GOTO candidate counterparts"
},
"message_text": "B. Gompertz, R. Kotak, J. Lyman, D. O'Neill, B. Godson, A. Kumar, P. Clark, K. Wiersema, L. Kelsey, M. Kennedy, G. Ramsay, K. Ackley, K. Ulaczyk, M. Dyer, T. Killestein, D. Steeghs, D. K. Galloway, V. Dhillon, P. O'Brien, D. Pollacco, K. Noysena, L. Nuttall, E. Pallé, report on behalf of the GOTO collaboration:\n\n\nWe report on optical observations with the Gravitational-wave Optical Transient Observer (GOTO; Steeghs et al. 2021) in response to the LIGO/Virgo candidate BNS event S230615az. Targeted observations covering 686 sqr. degrees or 24.1% of the localisation probability of the BAYESTAR skymap were performed between 21:16 UT June 15 and 00:35 UT June 16 2023 (3.43 to 6.75 hours after trigger).\n\n\nExposures were taken in L-band (400-700 nm passband) and the median 5 sigma depth was 20.3 AB magnitudes.\n\n\nImages were processed immediately after acquisition using the GOTO pipeline. Difference imaging was performed using recent survey observations of the same pointings. Source candidates were initially filtered using a classifier (Killestein et al. 2021) and cross-matched against a variety of contextual and minor planet catalogues. Human vetting was carried out in real time on any candidates that passed the above checks.\n\n\nWithin the 90% localisation region of the LVK skymap, we identify two priority candidate counterparts. Both are associated with catalogued galaxies that have photometric redshifts consistent with the GW distance posterior. We find no evidence of these sources prior to the GW alert in previous GOTO observations or the ZTF observations provided by the Lasair broker (Smith et al. 2019). We note possible low significance pre-GW flux in the ATLAS forced photometry server (Shingles et al. 2021) for GOTO23hn.\n\n\nName | RA(J2000) | Dec(J2000) | Filter | Mag(AB) | D_L(Mpc) | Catalog\n\nGOTO23hn | 12:40:35.55 | +17:02:15.27 | L | 19.49 +/- 0.10 | 278.0 | WISExSuperCOSMOS\n\nGOTO23hu | 13:22:55.23 | +08:09:49.57 | L | 19.43 +/- 0.08 | 245.6 | GLADE+\n\n\nMagnitudes were calibrated using ATLAS-REFCAT2 (Tonry et al. 2018) and not corrected for Galactic extinction.\n\n\nObservations are ongoing.\n\nGOTO (https://goto-observatory.org) is a network of telescopes operated at the Roque de los Muchachos Observatory on La Palma, Spain and Siding Spring Observatory in NSW, Australia; on behalf of a consortium including the University of Warwick, Monash University, Armagh Observatory & Planetarium, the University of Leicester, the University of Sheffield, the National Astronomical Research Institute of Thailand (NARIT), University of Turku, University of Portsmouth, University of Manchester and the Instituto de Astrofisica de Canarias (IAC)\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\n[object Promise]\n\n",
"published": "2023-06-16T15:47:43.063296Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-16T15:47:43.063318Z",
"modified": "2023-06-16T15:47:43.070851Z",
"nonlocalizedevents": [
{
"event_id": "S230615a"
}
],
"targets": []
},
{
"id": 306,
"topic": "gcn.circular",
"uuid": "51e5c4ad-5ce5-4e72-9f88-1598fea6ddfa",
"title": "LIGO/Virgo/KAGRA S230529ay: Upper limits from a two-week IceCube neutrino search",
"submitter": "Hop gcn.circular",
"authors": "Jessie Thwaites at IceCube/U Wisc-Madison <thwaites@wisc.edu>",
"data": {
"date": "23/06/16 21:56:09 GMT",
"from": "Jessie Thwaites at IceCube/U Wisc-Madison <thwaites@wisc.edu>",
"title": "GCN CIRCULAR",
"number": "33980",
"subject": "LIGO/Virgo/KAGRA S230529ay: Upper limits from a two-week IceCube neutrino search"
},
"message_text": "IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nIceCube has performed an additional search [1] for track-like muon neutrino events consistent with the sky localization of gravitational-wave candidate S230529ay in a time range of -0.1 day, +14 days from the alert event time (2023-05-29 15:51:00.03 UTC to 2023-06-12 18:15:00.03 UTC).\n\nDuring this time period IceCube was collecting good quality data. In this case, we report a p-value of 0.38, consistent with no significant excess of track events. IceCube's sensitivity assuming an E^-2 spectrum (E^2 dN/dE) to neutrino point sources within the locations spanned by the 90% spatial containment of the 4-Update map ranges from 0.028 to 1.219 GeV cm^-2 in this time window.\n\nThe IceCube Neutrino Observatory is a cubic-kilometer neutrino detector operating at the geographic South Pole, Antarctica. The IceCube realtime alert point of contact can be reached at roc@icecube.wisc.edu.\n\n[1] Abbasi et al. Astrophys.J. 944 (2023) 1, 80\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg2OTUyNTc1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.UseM3RYvEdtSyHyVXEgnv-Bnd-RfKXhGb9gzg2i9TEQ\n\n",
"published": "2023-06-16T21:56:20.872816Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-16T21:56:20.872837Z",
"modified": "2023-06-16T21:56:20.879672Z",
"nonlocalizedevents": [
{
"event_id": "S230529a"
}
],
"targets": []
},
{
"id": 307,
"topic": "gcn.circular",
"uuid": "6ff1ca72-fa3a-4d54-b398-57219dc1ba2d",
"title": "LIGO/Virgo/KAGRA S230615az: Xinglong-2.16m photometric observations of GIT candidates",
"submitter": "Hop gcn.circular",
"authors": "Dong Xu at NAOC/CAS <dxu@nao.cas.cn>",
"data": {
"date": "23/06/17 03:35:17 GMT",
"from": "Dong Xu at NAOC/CAS <dxu@nao.cas.cn>",
"title": "GCN CIRCULAR",
"number": "33981",
"subject": "LIGO/Virgo/KAGRA S230615az: Xinglong-2.16m photometric observations of GIT candidates"
},
"message_text": "Z.P. Zhu (NAOC, HUST), D. Xu, S.Y. Fu, X. Liu, S.Q. Jiang, T.H. Lu (NAOC) report:\n\nWe observed the field of the GW trigger S230615z candidates reported by GIT (Kumar et al., GCN 33974) with the 2.16m telescope located at Xinglong, Hebei, China, equipped with the BFOSC camera. Observations started at 12:47:19 UT on 2023-06-16 (i.e., 0.8 day after the GW trigger time), and 5x300 s frames were obtained in the R-band for either candidate.\n\nNo source is detected in our stacked images at either candidate's position (Kumar et al., GCN 33974), down to an upper limit of R~22.1 mag for both, calibrated with the nearby Pan-STARRS field.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg2OTcyOTIyLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.FUZPpHJorngEeL1sjln0cTbPsffIeRK81QJvKtMktcU\n\n",
"published": "2023-06-17T03:35:28.422195Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-17T03:35:28.422215Z",
"modified": "2023-06-17T03:35:28.428487Z",
"nonlocalizedevents": [
{
"event_id": "S230615a"
}
],
"targets": []
},
{
"id": 308,
"topic": "gcn.circular",
"uuid": "496aa8cd-849c-4400-a174-31dfb0450f58",
"title": "GRB 230616A: Swift/BAT-GUANO detection of a short burst outside the coded FOV",
"submitter": "Hop gcn.circular",
"authors": "Aaron Tohuvavohu at University of Toronto <aaron.tohu@gmail.com>",
"data": {
"date": "23/06/17 03:52:13 GMT",
"from": "Aaron Tohuvavohu at University of Toronto <aaron.tohu@gmail.com>",
"title": "GCN CIRCULAR",
"number": "33982",
"subject": "GRB 230616A: Swift/BAT-GUANO detection of a short burst outside the coded FOV"
},
"message_text": "Aaron Tohuvavohu (U Toronto), James DeLaunay (U Alabama), Samuele Ronchini (PSU), Gayathri Raman (PSU), Jamie A. Kennea (PSU) report:\n\nSwift/BAT did not localize GRB 230616A onboard (T0: 2023-06-16T20:37:56.8 UTC, INTEGRAL trig 10287)\n\nThe INTEGRAL notice, distributed in near real-time, triggered the Swift Mission Operations Center operated Gamma-ray Urgent Archiver for Novel Opportunities (GUANO; Tohuvavohu et al. 2020, ApJ, 900, 1).\n\nUpon trigger by this notice, GUANO sent a command to the Swift Burst Alert Telescope (BAT) to save 90 seconds of BAT event-mode data from [-45,+45] seconds around the time of the burst. All the requested event mode data was delivered to the ground.\n\nThe BAT likelihood search, NITRATES (DeLaunay + Tohuvavohu 2022, ApJ, 941, 169), detects the burst with a sqrt(TS) of 29.2 in a 0.128 s analysis time bin.\n\nNITRATES results are consistent with a burst coming from outside the FOV, with DeltaLLHOut of -1.\n\nSee Section 9.1 and Figures 10 and 17 in the NITRATES paper for brief descriptions and interpretation of sqrt(TS), DeltaLLHPeak, and DeltaLLHOut.\n\nGUANO is a fully autonomous, extremely low latency, spacecraft commanding pipeline designed for targeted recovery of BAT event mode data around the times of compelling astrophysical events to enable more sensitive GRB searches.\n\nA live reporting of Swift/BAT event data recovered by GUANO can be found at: https://www.swift.psu.edu/guano/\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg2OTczOTM4LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.BV8pXh-3xweTs-17lruaBptiimHTYVIdJdzb9ZvYgHU\n\n",
"published": "2023-06-17T03:52:24.531516Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-17T03:52:24.531538Z",
"modified": "2023-06-17T03:52:24.536787Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 309,
"topic": "gcn.circular",
"uuid": "49f6b4c2-3ac9-44a8-8945-17a2b37d6f6c",
"title": "GRB 230616A: AstroSat CZTI detection",
"submitter": "Hop gcn.circular",
"authors": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"data": {
"date": "23/06/17 05:57:29 GMT",
"from": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"title": "GCN CIRCULAR",
"number": "33983",
"subject": "GRB 230616A: AstroSat CZTI detection"
},
"message_text": "G. Waratkar (IITB), P K. Navaneeth (IUCAA), A. Vibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (Ashoka University/IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:\n\nAnalysis of AstroSat CZTI data with the CIFT framework (Sharma et al., 2021, JApA, 42, 73) showed the detection of a bright short GRB 230616A which was also detected by INTEGRAL/SPI-ACS (Trig 10287) and Swift/BAT-GUANO (Tohuvavohu et al., GCN Circ. 33982).\n\nThe source was clearly detected in the 20-200 keV energy range. The light curve peaks at 2023-06-16 20:37:58.765 UTC. The measured peak count rate associated with the burst is 6385 (+1349, -1043) counts/s above the background in the combined data of all quadrants, with a total of 307 (+42, -47) counts. The local mean background count rate was 431 (+29, -43) counts/s. Using cumulative rates, we measure a T90 of 0.06 (+0.01, -0.01) s.\n\nThe source was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range.\n\nCZTI is built by a TIFR-led consortium of institutes across India, including VSSC, URSC, IUCAA, SAC, and PRL. The Indian Space Research Organisation funded, managed, and facilitated the project.\n\nCZTI GRB detections are reported regularly on the payload site at:\nhttp://astrosat.iucaa.in/czti/?q=grb\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg2OTgxNDU1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.H32S7mD9K3-00HnulEoZUKmG5vkFIZI4T0hAgjA7tpQ\n\n",
"published": "2023-06-17T05:57:40.505007Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-17T05:57:40.505028Z",
"modified": "2023-06-17T05:57:40.511896Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 310,
"topic": "gcn.circular",
"uuid": "f736bd22-8275-4f7c-8bdf-c3a7ce95a6e6",
"title": "GRB 230614C: GRBAlpha detection",
"submitter": "Hop gcn.circular",
"authors": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"data": {
"date": "23/06/17 07:27:40 GMT",
"from": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"title": "GCN CIRCULAR",
"number": "33984",
"subject": "GRB 230614C: GRBAlpha detection"
},
"message_text": "M. Dafcikova, J. Ripa (Masaryk U.), A. Pal (Konkoly Observatory), N. Werner (Masaryk U.), M. Ohno, H. Takahashi (Hiroshima U.), L. Meszaros, B. Csak (Konkoly Observatory), N. Husarikova, F. Munz , M. Topinka, M. Kolar, J.-P. Breuer, F. Hroch (Masaryk U.), T. Urbanec, M. Kasal, A. Povalac (Brno U. of Technology), J. Hudec, J. Kapus, M. Frajt (Spacemanic s.r.o), R. Laszlo, M. Koleda (Needronix s.r.o), M. Smelko, P. Hanak, P. Lipovsky (Technical\nU. of Kosice), G. Galgoczi (Wigner Research Center/Eotvos U.), Y. Uchida, H. Poon, H.\nMatake (Hiroshima U.), N. Uchida (ISAS/JAXA), T. Bozoki (Eotvos U.), G. Dalya (Eotvos U.), T. Enoto (Kyoto U.), Zs. Frei (Eotvos U.), G. Friss (Eotvos U.), Y. Fukazawa, K. Hirose (Hiroshima U.), S. Hisadomi (Nagoya U.), Y. Ichinohe (Rikkyo U.), K. Kapas (Eotvos U.), L. L. Kiss (Konkoly Observatory), T. Mizuno (Hiroshima U.), K. Nakazawa (Nagoya U.), H. Odaka (Univ of Tokyo), J. Takatsy (Eotvos U.), K. Torigoe (Hiroshima U.), N. Kogiso, M. Yoneyama (Osaka Metropolitan U.), M. Moritaki (U. Tokyo), T. Kano (U. Michigan) -- the\nGRBAlpha collaboration.\n\nThe long-duration GRB 230614C (Fermi/GBM detection: GCN 33966; AstroSat detection: GCN 33969; INTEGRAL/SPI-ACS detection: trigger no. 10284) was observed by the GRBAlpha 1U CubeSat (Pal et al. 2023; arXiv:2302.10048).\n\nThe detection was confirmed at the peak time 2023-06-14 10:10:32 UTC. The T90 duration measured by GRBAlpha is 6 s and the overall significance during T90 reaches 43 sigma.\n\nThe light curve obtained by GRBAlpha is available here:\nhttps://grbalpha.konkoly.hu/static/share/GRB230614C_GCN.pdf\n\nAll GRBAlpha detections are listed at: https://monoceros.physics.muni.cz/hea/GRBAlpha/\nGRBAlpha, launched on 2021 March 22, is a demonstration mission for a future CubeSat constellation (Werner et al. Proc. SPIE 2018). The detector of GRBAlpha consists of a 75 x 75 x 5 mm3 CsI scintillator read out by a SiPM array, covering the energy range from ~50 keV to ~1000 keV. To increase the duty cycle and the downlink rate, the upgrade of the on-board data acquisition software stack is in progress. The ground segment is also supported by the radio amateur community and it takes advantage of the SatNOGS network for increased data downlink volume.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg2OTg2ODY2LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.3Rw2ogKSnqGH39YcwrHzz6xvIZPOM7QLZoA1CGwUvD0\n\n",
"published": "2023-06-17T07:27:52.235127Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-17T07:27:52.235162Z",
"modified": "2023-06-17T07:27:52.242353Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 315,
"topic": "gcn.circular",
"uuid": "102a1947-1bf5-4197-8531-80a010a6078c",
"title": "LIGO/Virgo/KAGRA S230615az: Non-Detections of GROWTH-India Candidates from GECKO Optical Observations",
"submitter": "Hop gcn.circular",
"authors": "Gregory Paek at Seoul National University <gregorypaek94@gmail.com>",
"data": {
"date": "23/06/17 13:54:22 GMT",
"from": "Gregory Paek at Seoul National University <gregorypaek94@gmail.com>",
"title": "GCN CIRCULAR",
"number": "33985",
"subject": "LIGO/Virgo/KAGRA S230615az: Non-Detections of GROWTH-India Candidates from GECKO Optical Observations"
},
"message_text": "Gregory S.-H. Paek (SNU ARC/SNU), Myungshin Im (SNU ARC/SNU), and Hyun-Il Sung (KASI), on behalf of the GECKO Team\n\nWe report the optical observations conducted with the LOAO telescopes of two optical counterpart candidates, GIT230615aa, and GIT230615ab (H. Kumar, GCN 33974) of the LIGO/Virgo/KAGRA gravitational-wave event, S230615az. The LOAO is a 1.0-meter class telescope in the USA. The LOAO observation started at 2023-06-16 05:03 (UT) or about 0.46 days after the GW alert in R-band. We calibrated flux with the PANSTARRS catalog and used an AB magnitude system. As a result, we could not detect any significant signals from the candidates. Furthermore, observations taken approximately 0.8 days after the GW alert also reported the non-detection of both candidates (Z.P. Zhu, GCN 33981). The preliminary 5 sigma depths of these images are below:\n\nOBJECT DATE-OBS[UTC] t-t0[days] FILTER EXPTIME DEPTH\nGIT230615aa 2023-06-16T05:03:20 0.46 R 180s*10 21.0\nGIT230615ab 2023-06-16T05:23:51 0.48 R 180s*10 20.8\n\nGravitational-wave EM Counterpart Korean Observatory (GECKO) is a network of 10+ 0.5m to 1m class telescopes worldwide. The Korea Astronomy and Space Science Institute operates LOAO. We thank the LOAO operators for their support for the observations.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3MDEwMDY4LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.TATr9FrPKZSt1II4nscsLbqi908zwFL3w9AYk8znPtU\n\n",
"published": "2023-06-17T13:54:33.291619Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-17T13:54:33.291655Z",
"modified": "2023-06-17T13:54:33.301597Z",
"nonlocalizedevents": [
{
"event_id": "S230615a"
}
],
"targets": []
},
{
"id": 605,
"topic": "gcn.circular",
"uuid": "2053f634-9b22-4217-af3c-2d550812f4d0",
"title": "ZTF23aaoohpy/AT2023lcr: further SAO RAS observations",
"submitter": "Hop gcn.circular",
"authors": "Moskvitin Alexander at SAO RAS <mosk@sao.ru>",
"data": {
"date": "23/06/25 08:21:06 GMT",
"from": "Moskvitin Alexander at SAO RAS <mosk@sao.ru>",
"title": "GCN CIRCULAR",
"number": "34078",
"subject": "ZTF23aaoohpy/AT2023lcr: further SAO RAS observations"
},
"message_text": "A. Moskvitin (SAO RAS), O. Spiridonova (SAO RAS), S. Belkin (IKI RAS,\nHSE), A. Pozanenko (IKI RAS), report on behalf of a larger\ncollaboration.\n\nWe observed the field of the fast red optical transient\nZTF23aaoohpy/AT2023lcr (Swain et al., GCN 34022) with the 1-m\ntelescope of SAO RAS Zeiss-1000/CCD-photometer on June, 22 and 23. We\nhave obtained 10 x 300 sec in Rc band during each night.\n\nThe OT (Swain et al., GCN 34022; Gompertz et al., GCN 34023; Kumar et\nal., GCN 34025; Adami et al., GCN 34030; Perley et al., GCN 34031;\nJiang et al., GCN 34040; Perley et al., GCN 34041; Fulton et al., GCN\n34042; Chen et al., GCN 34043, Belkin et al., GCN 34047; Breeveld, GCN\n34049; Leonini et al., GCN 34052; Moskvitin et al., GCN 34060, Belkin\net al., GCN 34077) is clearly detected in the stacked frames.\nPreliminary results are as following.\n\nDate UT-start MJD_mid t-T0 R_mag\n2023-06-22 22:43:06 60117.96396 4.68865 21.68 +/- 0.14\n2023-06-23 21:14:21 60118.91196 5.63665 22.12 +/- 0.08\n\nPhotometry is based on stars mentioned in Belkin et al.(GCN 34047,\n34077) and Moskvitin et al. (GCN 34060). t-T0 is given in days after\nthe ZTF discovery (Swain et al., GCN 34022).\n\nThe light curve of the source has a shallow decay at least between\nMJD`616 and MJD`618, and then the decay becomes significantly\nsteeper between MJD`618 and MJD`619.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3NjgxMjcyLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.a2_KIMM6EuznVCHrNgT4atFr8n52Unt8schgpC4qd7k\n\n",
"published": "2023-06-25T08:21:17.556972Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-25T08:21:17.556991Z",
"modified": "2023-06-25T08:21:17.562935Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 5872,
"topic": "gcn.circular",
"uuid": "4e93cb78-4561-46dd-96c7-5248f39b83bf",
"title": "Fermi GRB 240119A: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "24/01/20 00:46:03 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/35585"
},
"title": "GCN CIRCULAR",
"number": "35585",
"subject": "Fermi GRB 240119A: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko,\nG.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gress, N.M. Budnev, O.Ershova\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,\nA.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nV. Yurkov, A. Gabovich\n(Blagoveschensk Educational State University)\n\nMASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB 240119A ( \"The Fermi GBM team, GCN 35583) errorbox 24476 sec after notice time and 24484 sec after trigger time at 2024-01-20 00:17:12 UT, with upper limit up to 19.8 mag. The observations began at zenith distance = 52 deg. The sun altitude is -33.6 deg.\n\nThe galactic latitude b = -22 deg., longitude l = 299 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id#60174\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 24514 | 2024-01-20 00:17:12 | MASTER-SAAO | (10h 07m 17.25s , -84d 10m 49.7s) | C | 60 | 19.6 |\n 24514 | 2024-01-20 00:17:12 | MASTER-SAAO | (10h 25m 18.35s , -84d 23m 42.8s) | C | 60 | 19.5 |\n 24594 | 2024-01-20 00:18:31 | MASTER-SAAO | (09h 30m 35.62s , -82d 17m 59.7s) | C | 60 | 19.7 |\n 24594 | 2024-01-20 00:18:31 | MASTER-SAAO | (09h 44m 15.29s , -82d 30m 47.6s) | C | 60 | 19.5 |\n 24674 | 2024-01-20 00:19:51 | MASTER-SAAO | (11h 24m 48.94s , -82d 18m 00.4s) | C | 60 | 19.8 |\n 24674 | 2024-01-20 00:19:51 | MASTER-SAAO | (11h 38m 19.63s , -82d 31m 09.3s) | C | 60 | 19.6 |\n 24753 | 2024-01-20 00:21:10 | MASTER-SAAO | (11h 21m 22.33s , -86d 04m 09.3s) | C | 60 | 19.6 |\n 24753 | 2024-01-20 00:21:10 | MASTER-SAAO | (11h 48m 01.32s , -86d 17m 30.3s) | C | 60 | 19.6 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35585.",
"published": "2024-01-20T00:46:14.128901Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-01-20T00:46:14.128920Z",
"modified": "2024-01-20T00:46:14.136563Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 318,
"topic": "gcn.circular",
"uuid": "d8fc8147-99ae-4e93-b634-e43a7bc14f52",
"title": "LIGO/Virgo/KAGRA S230615az: T80S Search and Candidate Counterpart Identification",
"submitter": "Hop gcn.circular",
"authors": "André Santos <andsouzasanttos@gmail.com>",
"data": {
"date": "23/06/17 22:15:01 GMT",
"from": "André Santos <andsouzasanttos@gmail.com>",
"title": "GCN CIRCULAR",
"number": "33986",
"subject": "LIGO/Virgo/KAGRA S230615az: T80S Search and Candidate Counterpart Identification"
},
"message_text": "A. Santos (CBPF/Fermilab), C. D. Kilpatrick (Northwestern), C. R. Bom (CBPF), Eduardo Lacerda (IAG-USP) report on behalf of the STEP-GW collaboration:\n\nWe conducted an optical search for candidate counterparts in the localization region of LVK gravitational wave event S230615az with the T80S 0.8-m robotic telescope using the 1.4 x 1.4 field-of-view camera. The tiling was optimally determined using the latest localization map from the LVK and galaxy catalogs in Teglon (Coulter et al., in prep.). In total, T80S observed 24 fields (68 individual exposures at total) within the 90th percentile localization region of S230615az. All of our completed pointings have been uploaded to the GW Treasure Map (Wyatt et al., 2020) at https://treasuremap.space/alerts?graceids=S230615az.\n\nSubtracting DECam and SkyMapper template images from the T80S images using photpipe (Rest et al., 2005), we identified the following candidate counterpart in our imaging:\n\nName MJD RA(deg) Dec(deg) Filter Mag Magerr \nSTEP23a 60111.4340 40.79975 -46.65150667 g 19.806 0.09\n\nWe have checked the Minor Planet Center and Transient Name Server, finding no previously reported solar system object or transient. We encourage follow-up observations of this source.\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3MDQwMTA2LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.9WByuMPLSJHA4jlT3Q5b4MJnQu14ukeUKkgnjKeYh1I\n\n",
"published": "2023-06-17T22:15:15.291745Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-17T22:15:15.291766Z",
"modified": "2023-06-17T22:15:15.300124Z",
"nonlocalizedevents": [
{
"event_id": "S230615a"
}
],
"targets": []
},
{
"id": 363,
"topic": "gcn.circular",
"uuid": "6d0a5643-ce43-4447-a9de-3f4be804eba1",
"title": "GRB 230616A: Swift-XRT observations",
"submitter": "Hop gcn.circular",
"authors": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"data": {
"date": "23/06/18 15:39:42 GMT",
"from": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"title": "GCN CIRCULAR",
"number": "34006",
"subject": "GRB 230616A: Swift-XRT observations"
},
"message_text": "P. D'Avanzo (INAF-OAB), M.G. Bernardini (INAF-OAB), D.N. Burrows (PSU),\nJ. D. Gropp (PSU), S. Dichiara (PSU), A.P. Beardmore (U. Leicester),\nJ.P. Osborne (U. Leicester), E. Ambrosi (INAF-IASFPA)\tand P.A. Evans\n(U. Leicester) report on behalf of the Swift-XRT team:\n\nSwift-XRT has performed follow-up observations of the IPN-detected\nburst GRB 230616A in a series of observations tiled on the sky. The\ntotal exposure time is 4.6 ks, distributed over 4 tiles; the maximum\nexposure at a single sky location was 2.0 ks. The data were collected\nbetween T0+111.3 ks and T0+140.7 ks, and are entirely in Photon\nCounting (PC) mode.\n\nThree uncatalogued X-ray sources have been detected, however none of\nthem is above the RASS limit or shows definitive signs of fading.\nTherefore, at the present time we cannot identify which, if any, is the\nafterglow. Details of these sources are given below:\n\nSource 1:\n RA (J2000.0): 192.1005 = 12:48:24.12\n Dec (J2000.0): +5.4365 = +05:26:11.4\n Error: 8.2 arcsec (radius, 90% conf.)\n Count-rate: 0.0177 [+0.0053, -0.0045] ct s^-1\n Distance: 1675 arcsec from IPN position.\n Flux: (6.8 [+2.1, -1.7])e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nSource 2:\n RA (J2000.0): 192.2299 = 12:48:55.18\n Dec (J2000.0): +6.0936 = +06:05:36.9\n Error: 5.1 arcsec (radius, 90% conf. [Enhanced position])\n Count-rate: 0.0125 [+0.0046, -0.0037] ct s^-1\n Distance: 820 arcsec from IPN position.\n Flux: (4.2 [+1.5, -1.3])e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nSource 3:\n RA (J2000.0): 191.8031 = 12:47:12.74\n Dec (J2000.0): +5.5136 = +05:30:48.9\n Error: 6.0 arcsec (radius, 90% conf.)\n Count-rate: (5.7 [+3.5, -2.5])e-3 ct s^-1\n Distance: 1769 arcsec from IPN position.\n\nThe results of the XRT-team automatic analysis of the tiled XRT\nobservations, including a position-specific upper limit calculator, are\navailable at https://www.swift.ac.uk/xrt_products/TILED_GRB00112.\n\nThis circular is an official product of the Swift-XRT team.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3MTAyNzg3LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.Y2pmR7lFcgRWgwJV5nJ6rN_el_chlh3y9_5OH_F74-8\n\n",
"published": "2023-06-18T15:39:57.214194Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-18T15:39:57.214215Z",
"modified": "2023-06-18T15:39:57.221377Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 364,
"topic": "gcn.circular",
"uuid": "7e06e78f-9dd0-43d6-9a48-5d20324ddcc8",
"title": "GRB 230618A: Swift-XRT refined Analysis",
"submitter": "Hop gcn.circular",
"authors": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"data": {
"date": "23/06/18 15:56:45 GMT",
"from": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"title": "GCN CIRCULAR",
"number": "34007",
"subject": "GRB 230618A: Swift-XRT refined Analysis"
},
"message_text": "M.G. Bernardini (INAF-OAB), J. D. Gropp (PSU), S. Dichiara (PSU), J.A.\nKennea (PSU), P.A. Evans (U. Leicester), J.P. Osborne (U. Leicester),\nK.L. Page (U. Leicester), E. Ambrosi (INAF-IASFPA) , M. Capalbi\n(INAF-IASFPA) report on behalf of the Swift-XRT team:\n\nWe have analysed 6.3 ks of XRT data for GRB 230618A, from 118 s to 30.0\nks after the BAT trigger. The data comprise 157 s in Windowed Timing\n(WT) mode (the first 9 s were taken while Swift was slewing) with the\nremainder in Photon Counting (PC) mode. The best available XRT position\n (using the promptly downlinked event data, the XRT-UVOT alignment and\nmatching UVOT field sources to the USNO-B1 catalogue) is RA, Dec 196.60531, 3.30238 which is equivalent to:\n\nRA (J2000): 13 06 25.27\nDec(J2000): +03 18 08.6\n\nwith an uncertainty of 1.9 arcsec (radius, 90% confidence).\n\nThe light curve can be modelled with a series of power-law decays. The\ninitial decay index is alpha=1.10 (+0.13, -0.10). At T+594 s the decay\nsteepens to an alpha of 2.90 (+0.40, -0.23) before breaking again at\nT+3047 s to a final decay with index alpha=0.29 (+0.68, -0.29).\n\nA spectrum formed from the WT mode data can be fitted with an absorbed\npower-law with a photon spectral index\tof 1.55 (+0.13, -0.12). The\nbest-fitting absorption column is 1.4 (+0.5, -0.4) x 10^21 cm^-2, in\nexcess of the Galactic value of 2.1 x 10^20 cm^-2 (Willingale et al.\n2013). The PC mode spectrum has a photon index of 1.73 (+/-0.17) and a\nbest-fitting absorption column of 2.1 (+0.7, -0.6) x 10^21 cm^-2. The\ncounts to observed (unabsorbed) 0.3-10 keV flux conversion factor\ndeduced from this spectrum is 4.1 x 10^-11 (5.2 x 10^-11) erg cm^-2\ncount^-1.\n\nA summary of the PC-mode spectrum is thus:\nTotal column:\t 2.1 (+0.7, -0.6) x 10^21 cm^-2\nGalactic foreground: 2.1 x 10^20 cm^-2\nExcess significance: 5.0 sigma\nPhoton index:\t 1.73 (+/-0.17)\n\nIf the light curve continues to decay with a power-law decay index of\n0.29, the count rate at T+24 hours will be 8.8 x 10^-3 count s^-1,\ncorresponding to an observed (unabsorbed) 0.3-10 keV flux of 3.6 x\n10^-13 (4.5 x 10^-13) erg cm^-2 s^-1.\n\nThe results of the XRT-team automatic analysis are available at\nhttp://www.swift.ac.uk/xrt_products/01175438.\n\nThis circular is an official product of the Swift-XRT team.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3MTAzODEwLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.TT35uyXOtBBpivrTwpu_VdJaVn6dPhg6kyLTwX_bcZk\n\n",
"published": "2023-06-18T15:56:56.089752Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-18T15:56:56.089772Z",
"modified": "2023-06-18T15:56:56.106829Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2471,
"topic": "gcn.circular",
"uuid": "ed348e3f-1e4c-4c13-9367-2cb3a13d3a3c",
"title": "LIGO/Virgo/KAGRA S230825k: Upper limits from Swift/BAT-GUANO",
"submitter": "Hop gcn.circular",
"authors": "Samuele Ronchini at PSU <sjs8171@psu.edu>",
"data": {
"date": "23/08/26 03:25:51 GMT",
"from": "Samuele Ronchini at PSU <sjs8171@psu.edu>",
"title": "GCN CIRCULAR",
"number": "34559",
"subject": "LIGO/Virgo/KAGRA S230825k: Upper limits from Swift/BAT-GUANO"
},
"message_text": "Samuele Ronchini (PSU), Aaron Tohuvavohu (U Toronto), James DeLaunay (U Alabama), Jamie A. Kennea (PSU), Tyler Parsotan (NASA GSFC), Gayathri Raman (PSU) report:\n\nSwift/BAT was observing 86.41% of the GW localization probability (Bilby.offline0.multiorder.fits) at merger time. A fraction 27.82 % of the GW localization posterior is contained inside the BAT coded FoV.\n\nThe LVK notice, distributed in near real-time, triggered the Swift Mission Operations Center operated Gamma-ray Urgent Archiver for Novel Opportunities (GUANO; Tohuvavohu et al. 2020, ApJ, 900, 1).\n\nUpon trigger by this notice, GUANO sent a command to the Swift Burst Alert Telescope (BAT) to save 200 seconds of BAT event-mode data from [-50,+150] seconds around the time of the burst. All the requested event mode data was delivered to the ground.\n\nUsing the NITRATES analysis (DeLaunay + Tohuvavohu 2022, ApJ, 941, 169), we searched for emission on 8 timescales from 0.128s to 16.384s in the interval [-20,+20] seconds around the merger time. We find no evidence for a signal, and derive the following upper limits.\n\nWe quote the 5-sigma flux upper limits in the 15-350 keV band, weighted over the GW localization, for four spectral templates (soft, normal, and hard GRB-like templates described in [arXiv:1612.02395], and spectral shape from GRB170817A [arXiv:1710.05446]) and for four time bins.\nIn units of 10^-7 erg/s/cm^2:\n\ntime_bin (s) soft normal hard GRB170817\n------------------------------------\n0.256 11.0 7.4\t 6.7\t8.2\n1.024 5.6 3.8\t 3.4\t4.2\n4.096 3.0 2.0\t 1.8\t2.3\n16.384 1.9 1.3\t 1.1\t1.4\n\n\nThe upper limits as function of sky position are plotted here, alongside the GW localization:\nhttps://doi.org/10.5281/zenodo.8285069\nThe solid and dashed lines indicate the 90% and 50% GW contour levels, respectively.\n\nThe corresponding fits file can be found here:\nhttps://doi.org/10.5281/zenodo.8285073\n\nGUANO is a fully autonomous, extremely low latency, spacecraft\ncommanding pipeline designed for targeted recovery of BAT event mode\ndata around the times of compelling astrophysical events to enable\nmore sensitive GRB searches.\n\nA live reporting of Swift/BAT event data recovered by GUANO can be\nfound at: https://www.swift.psu.edu/guano/\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkzMDIwMzU2LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.9I1JsIO6gylw3G4GGPO3hQXPsVELtCri-ABiRkDPA_c\n\n",
"published": "2023-08-26T03:26:01.910510Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-26T03:26:01.910527Z",
"modified": "2023-08-26T03:26:01.914610Z",
"nonlocalizedevents": [
{
"event_id": "S230825k"
}
],
"targets": []
},
{
"id": 323,
"topic": "gcn.circular",
"uuid": "a2f28e97-5eef-4d7e-9b6e-16c641506f49",
"title": "GRB 230617A: Fermi GBM Final Real-time Localization",
"submitter": "Hop gcn.circular",
"authors": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"data": {
"date": "23/06/17 22:23:59 GMT",
"from": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"title": "GCN CIRCULAR",
"number": "33987",
"subject": "GRB 230617A: Fermi GBM Final Real-time Localization"
},
"message_text": "The Fermi GBM team reports the detection of a likely SHORT GRB\n\nAt 22:13:31 UT on 17 Jun 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230617A (trigger 708732816.996698 / 230617926).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 139.4, Dec = -70.5 (J2000 degrees, equivalent to J2000 09h 17m, -70d 30'), with a statistical uncertainty of 25.5 degrees.\n\nThe angle from the Fermi LAT boresight is 90.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230617926/quicklook/glg_skymap_all_bn230617926.png\n\nThe HEALPix FITS file, including the estimated localization systematic, can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230617926/quicklook/glg_healpix_all_bn230617926.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230617926/quicklook/glg_lc_medres34_bn230617926.gif\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3MDQwNjQ1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.1jrHQlBZj-DX44gmZf2fSI_TnmoVB6rSNpD3q2NHRW8\n\n",
"published": "2023-06-17T22:24:10.504139Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-17T22:24:10.504171Z",
"modified": "2023-06-17T22:24:10.509183Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 327,
"topic": "gcn.circular",
"uuid": "bba3141e-7743-4d57-856a-8db04df0e1a2",
"title": "GRB 230616A: Swift ToO observations",
"submitter": "Hop gcn.circular",
"authors": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"data": {
"date": "23/06/18 03:33:14 GMT",
"from": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"title": "GCN CIRCULAR",
"number": "33988",
"subject": "GRB 230616A: Swift ToO observations"
},
"message_text": "P. A. Evans (U. Leicester) reports on behalf of the Swift team:\n\nSwift has initiated a ToO observation of the IPN GRB 230616A.\nAutomated analysis of the XRT data will be presented online at\nhttps://www.swift.ac.uk/ToO_GRBs/00021576\n\nAny uncatalogued X-ray sources detected in this analysis will be\nreported on this website and via GCN COUNTERPART notices. These are\nnot necessarily related to the IPN event. Any X-ray source\nconsidered to be a probable afterglow candidate will be reported via a\nGCN Circular after manual consideration.\n\nDetails of the XRT automated analysis methods are detailed in Evans et\nal. (2007, A&A, 469, 379; 2009, MNRAS, 397, 1177 and 2014, ApJS, 210, 8).\n\nThis circular is an official product of the Swift-XRT team.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3MDU5MjAwLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.66YgTMr8cHm7_gDYuktW_6D5ptrI4AizF4anM6oNkeY\n\n",
"published": "2023-06-18T03:33:26.764947Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-18T03:33:26.764969Z",
"modified": "2023-06-18T03:33:26.770481Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 328,
"topic": "gcn.circular",
"uuid": "e7d678e1-6142-4a3a-b555-2ab2eca2057b",
"title": "GRB 230618A: Swift detection of a burst",
"submitter": "Hop gcn.circular",
"authors": "David Palmer at LANL <palmer@lanl.gov>",
"data": {
"date": "23/06/18 04:09:22 GMT",
"from": "David Palmer at LANL <palmer@lanl.gov>",
"title": "GCN CIRCULAR",
"number": "33989",
"subject": "GRB 230618A: Swift detection of a burst"
},
"message_text": "\nK. L. Page (U Leicester) and S. Laha (GSFC/UMBC) report on behalf of\nthe Neil Gehrels Swift Observatory Team:\n\nAt 03:51:12 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 230618A (trigger\u001175438). Swift slewed immediately to the burst.\nThe BAT on-board calculated location is\nRA, Dec 196.588, +3.306 which is\n RA(J2000) = 13h 06m 21s\n Dec(J2000) = +03d 18' 20\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including\nsystematic uncertainty). Due to a telemetry outage caused by\na recent storm in Guam, no further BAT data will be available\nuntil a ground station pass.\n\nUsing promptly downlinked data we find a bright, uncatalogued X-ray\nsource located at RA, Dec 196.60313, 3.30257 which is equivalent to:\n RA(J2000) = 13h 06m 24.75s\n Dec(J2000) = +03d 18' 09.3\"\nwith an uncertainty of 5.8 arcseconds (radius, 90% containment). This\nposition may be improved as more data are received; the latest position\nis available at https://www.swift.ac.uk/sper. No spectrum from the\npromptly downlinked event data is yet available to determine the column\ndensity.\n\nThe initial flux in the 2.5 s image was 6.46e-10 erg cm^-2 s^-1 (0.2-10\nkeV).\n\nUVOT took a finding chart exposure of nominal 150.000 seconds with the White\nfilter starting 137 seconds after the BAT trigger. No credible afterglow\ncandidate has been found in the initial data products. Data from the 2.7'x2.7'\nsub-image are not available at this time. The 8'x8' region for the list of\nsources generated on-board covers 100% of the XRT error circle. The list of\nsources is typically complete to about 18 mag. No correction has been made for\nthe expected extinction corresponding to E(B-V) of 0.025.\n\nBurst Advocate for this burst is K. L. Page (klp5 AT leicester.ac.uk).\nPlease contact the BA by email if you require additional information\nregarding Swift followup of this burst. In extremely urgent cases, after\ntrying the Burst Advocate, you can contact the Swift PI by phone (see\nSwift TOO web site for information: http://www.swift.psu.edu/)\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3MDYxMzY3LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.MQfImm3I9xu-PTD9KpzeQc0PLcalDBTT_5A7Rk4zJV8\n\n",
"published": "2023-06-18T04:09:32.526682Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-18T04:09:32.526702Z",
"modified": "2023-06-18T04:09:32.544515Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 329,
"topic": "gcn.circular",
"uuid": "edecc911-d29e-4575-8434-5261bc81f7a5",
"title": "GRB 230618A: Prompt enhanced Swift-XRT position",
"submitter": "Hop gcn.circular",
"authors": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"data": {
"date": "23/06/18 04:31:34 GMT",
"from": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"title": "GCN CIRCULAR",
"number": "33990",
"subject": "GRB 230618A: Prompt enhanced Swift-XRT position"
},
"message_text": "P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team:\n\nUsing promptly downlinked XRT event data for GRB 230618A, we find an\nenhanced XRT position of the afterglow: RA, Dec: 196.60310, 3.30343\nwhich is equivalent to:\n RA (J2000) = 13 06 24.74\n Dec (J2000) = +03 18 12.3\nwith an uncertainty of 1.9 arcseconds (radius, 90% confidence).\nAnalysis of the promptly available data is online at\nhttp://www.swift.ac.uk/sper/1175438.\n\nPosition enhancement is is described by Goad et al. (2007, A&A, 476,\n1401) and Evans et al. (2009, MNRAS, 397, 1177).\n\nThis circular is an official product of the Swift-XRT team.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3MDYyNjk5LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.Tcz5OXWyxvNwNmYRsbW694_1Y8s7BasvdKqxbBQtJQU\n\n",
"published": "2023-06-18T04:31:45.274824Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-18T04:31:45.274845Z",
"modified": "2023-06-18T04:31:45.281434Z",
"nonlocalizedevents": [],
"targets": []
}
]
}
