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"subject": "Fermi GRB 230812B: 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-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB 230812B ( Fermi GBM team, GCN 34386) errorbox 10680 sec after notice time and 10713 sec after trigger time at 2023-08-12 21:56:45 UT, with upper limit up to 19.3 mag. The observations began at zenith distance = 50 deg. The sun altitude is -31.0 deg.\n\nThe galactic latitude b = 41 deg., longitude l = 72 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"53499\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 10804 | 2023-08-12 21:56:45 | MASTER-Tavrida | (16h 41m 41.24s , +46d 23m 36.1s) | C | 180 | 19.3 |\n 10992 | 2023-08-12 21:59:54 | MASTER-Tavrida | (16h 41m 46.04s , +46d 22m 29.1s) | C | 180 | 19.1 |\n 11111 | 2023-08-12 22:03:07 | MASTER-Tavrida | (16h 41m 40.73s , +46d 21m 24.6s) | C | 30 | 17.8 |\n 11151 | 2023-08-12 22:03:47 | MASTER-Tavrida | (16h 41m 47.62s , +46d 21m 41.9s) | C | 30 | 17.8 |\n 11189 | 2023-08-12 22:04:25 | MASTER-Tavrida | (16h 41m 44.53s , +46d 23m 10.6s) | C | 30 | 17.9 |\n 11227 | 2023-08-12 22:05:04 | MASTER-Tavrida | (16h 41m 44.48s , +46d 21m 32.8s) | C | 30 | 17.8 |\n 11267 | 2023-08-12 22:05:43 | MASTER-Tavrida | (16h 41m 47.52s , +46d 22m 59.5s) | C | 30 | 17.8 |\n 11304 | 2023-08-12 22:06:21 | MASTER-Tavrida | (16h 41m 40.68s , +46d 22m 18.0s) | C | 30 | 17.8 |\n 11343 | 2023-08-12 22:06:59 | MASTER-Tavrida | (16h 41m 41.50s , +46d 23m 16.6s) | C | 30 | 18.0 |\n 11381 | 2023-08-12 22:07:38 | MASTER-Tavrida | (16h 41m 47.28s , +46d 22m 15.3s) | C | 30 | 17.8 |\n 11495 | 2023-08-12 22:08:17 | MASTER-Tavrida | (16h 39m 42.09s , +46d 39m 09.7s) | C | 180 | 19.0 |\n 11683 | 2023-08-12 22:11:25 | MASTER-Tavrida | (16h 39m 49.58s , +46d 39m 04.4s) | C | 180 | 19.0 |\n 11874 | 2023-08-12 22:14:36 | MASTER-Tavrida | (16h 41m 28.89s , +45d 40m 34.6s) | C | 180 | 19.0 |\n 12063 | 2023-08-12 22:17:44 | MASTER-Tavrida | (16h 41m 29.14s , +45d 39m 21.9s) | C | 180 | 19.0 |\n 12251 | 2023-08-12 22:20:53 | MASTER-Tavrida | (16h 41m 31.63s , +45d 40m 21.9s) | 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\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxODc5NDczLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.HVQql4E5GDoa-bmCaSo-oO6UAMC_qgCKBmuzs1wfPUs\n\n",
"published": "2023-08-12T22:31:19.452281Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-12T22:31:19.452299Z",
"modified": "2023-08-12T22:31:19.455856Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2022,
"topic": "gcn.circular",
"uuid": "465918a2-1ac1-46d8-b3e9-e3c9885bb322",
"title": "LAT GRB230812.79: 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": "23/08/13 01:00:33 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "34390",
"subject": "LAT GRB230812.79: 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-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the LAT GRB230812.79 (trigger No 230812790,16h 35m 45.60s , +47d 56m 42.0s, R=0.172833) errorbox 10713 sec after trigger time at 2023-08-12 21:56:45 UT, with upper limit up to 19.3 mag. The observations began at zenith distance = 50 deg. The sun altitude is -31.0 deg.\n\nMASTER-OAFA robotic telescope located in Argentina (OAFA observatory of San Juan National University) was pointed to the LAT GRB230812.79 errorbox 15682 sec after trigger time at 2023-08-12 23:19:34 UT, with upper limit up to 18.2 mag. Observations started at twilight. The observations began at zenith distance = 78 deg. The sun altitude is -16.0 deg.\n\nThe galactic latitude b = 42 deg., longitude l = 74 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"53603\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 10804 | 2023-08-12 21:56:45 | MASTER-Tavrida | (16h 41m 41.24s , +46d 23m 36.1s) | C | 180 | 19.3 |\n 10992 | 2023-08-12 21:59:54 | MASTER-Tavrida | (16h 41m 46.04s , +46d 22m 29.1s) | C | 180 | 19.1 |\n 11111 | 2023-08-12 22:03:07 | MASTER-Tavrida | (16h 41m 40.73s , +46d 21m 24.6s) | C | 30 | 17.8 |\n 11151 | 2023-08-12 22:03:47 | MASTER-Tavrida | (16h 41m 47.62s , +46d 21m 41.9s) | C | 30 | 17.8 |\n 11189 | 2023-08-12 22:04:25 | MASTER-Tavrida | (16h 41m 44.53s , +46d 23m 10.6s) | C | 30 | 17.9 |\n 11227 | 2023-08-12 22:05:04 | MASTER-Tavrida | (16h 41m 44.48s , +46d 21m 32.8s) | C | 30 | 17.8 |\n 11267 | 2023-08-12 22:05:43 | MASTER-Tavrida | (16h 41m 47.52s , +46d 22m 59.5s) | C | 30 | 17.8 |\n 11304 | 2023-08-12 22:06:21 | MASTER-Tavrida | (16h 41m 40.68s , +46d 22m 18.0s) | C | 30 | 17.8 |\n 11343 | 2023-08-12 22:06:59 | MASTER-Tavrida | (16h 41m 41.50s , +46d 23m 16.6s) | C | 30 | 18.0 |\n 11381 | 2023-08-12 22:07:38 | MASTER-Tavrida | (16h 41m 47.28s , +46d 22m 15.3s) | C | 30 | 17.8 |\n 11495 | 2023-08-12 22:08:17 | MASTER-Tavrida | (16h 39m 42.09s , +46d 39m 09.7s) | C | 180 | 19.0 |\n 11683 | 2023-08-12 22:11:25 | MASTER-Tavrida | (16h 39m 49.58s , +46d 39m 04.4s) | C | 180 | 19.0 |\n 12443 | 2023-08-12 22:24:04 | MASTER-Tavrida | (16h 42m 43.40s , +47d 09m 33.2s) | C | 180 | 19.2 |\n 12630 | 2023-08-12 22:27:11 | MASTER-Tavrida | (16h 42m 43.44s , +47d 10m 26.3s) | C | 180 | 19.0 |\n 12822 | 2023-08-12 22:30:24 | MASTER-Tavrida | (16h 37m 35.03s , +46d 09m 23.7s) | C | 180 | 18.7 |\n 13010 | 2023-08-12 22:33:32 | MASTER-Tavrida | (16h 37m 29.92s , +46d 08m 17.3s) | C | 180 | 18.6 |\n 13202 | 2023-08-12 22:36:44 | MASTER-Tavrida | (16h 29m 37.44s , +46d 08m 30.0s) | C | 180 | 18.7 |\n 13389 | 2023-08-12 22:39:51 | MASTER-Tavrida | (16h 29m 33.96s , +46d 09m 50.2s) | C | 180 | 18.7 |\n 13961 | 2023-08-12 22:49:23 | MASTER-Tavrida | (16h 29m 36.75s , +47d 38m 29.9s) | C | 180 | 18.7 |\n 14149 | 2023-08-12 22:52:30 | MASTER-Tavrida | (16h 29m 37.60s , +47d 39m 23.6s) | C | 180 | 18.6 |\n 15563 | 2023-08-12 23:16:04 | MASTER-Tavrida | (16h 41m 55.05s , +46d 19m 46.5s) | C | 180 | 18.3 |\n 15750 | 2023-08-12 23:19:12 | MASTER-Tavrida | (16h 41m 50.04s , +46d 18m 40.4s) | C | 180 | 18.3 |\n 15712 | 2023-08-12 23:19:34 | MASTER-OAFA | (16h 32m 37.39s , +46d 49m 30.8s) | C | 60 | 17.3 |\n 15823 | 2023-08-12 23:21:25 | MASTER-OAFA | (16h 44m 16.19s , +46d 50m 30.3s) | C | 60 | 17.4 |\n 16022 | 2023-08-12 23:24:44 | MASTER-Tavrida | (16h 45m 47.32s , +48d 24m 35.8s) | C | 60 | 18.3 |\n 16093 | 2023-08-12 23:25:54 | MASTER-Tavrida | (16h 45m 51.22s , +48d 25m 57.5s) | C | 60 | 18.3 |\n 16165 | 2023-08-12 23:27:06 | MASTER-Tavrida | (16h 37m 46.75s , +48d 25m 03.8s) | C | 60 | 18.1 |\n 16234 | 2023-08-12 23:28:15 | MASTER-Tavrida | (16h 37m 47.03s , +48d 26m 00.9s) | C | 60 | 18.1 |\n 16305 | 2023-08-12 23:29:26 | MASTER-Tavrida | (16h 37m 47.02s , +47d 07m 12.8s) | C | 60 | 17.7 |\n 16375 | 2023-08-12 23:30:36 | MASTER-Tavrida | (16h 37m 41.37s , +47d 06m 10.6s) | C | 60 | 17.7 |\n 16507 | 2023-08-12 23:31:48 | MASTER-Tavrida | (16h 41m 57.87s , +46d 18m 31.8s) | C | 180 | 18.3 |\n 16639 | 2023-08-12 23:35:00 | MASTER-Tavrida | (16h 33m 49.28s , +48d 07m 40.9s) | C | 60 | 17.9 |\n 16708 | 2023-08-12 23:36:10 | MASTER-Tavrida | (16h 33m 49.34s , +48d 05m 48.0s) | C | 60 | 17.9 |\n 16792 | 2023-08-12 23:37:34 | MASTER-OAFA | (16h 32m 29.87s , +46d 50m 00.3s) | C | 60 | 17.4 |\n 16903 | 2023-08-12 23:39:25 | MASTER-OAFA | (16h 44m 13.26s , +46d 50m 40.8s) | C | 60 | 17.5 |\n 17581 | 2023-08-12 23:50:43 | MASTER-Tavrida | (16h 41m 57.02s , +48d 54m 55.2s) | C | 60 | 17.9 |\n 17652 | 2023-08-12 23:51:54 | MASTER-Tavrida | (16h 41m 51.05s , +48d 54m 01.4s) | C | 60 | 17.8 |\n 18078 | 2023-08-12 23:58:59 | MASTER-OAFA | (16h 31m 15.33s , +49d 01m 01.6s) | C | 60 | 17.2 |\n 18292 | 2023-08-13 00:01:33 | MASTER-Tavrida | (16h 41m 50.91s , +48d 05m 48.1s) | C | 180 | 18.1 |\n 18411 | 2023-08-13 00:04:33 | MASTER-OAFA | (16h 32m 35.81s , +46d 50m 46.2s) | C | 60 | 17.5 |\n 18479 | 2023-08-13 00:04:41 | MASTER-Tavrida | (16h 41m 51.27s , +48d 06m 41.4s) | C | 180 | 18.2 |\n 18523 | 2023-08-13 00:06:24 | MASTER-OAFA | (16h 44m 10.88s , +46d 49m 31.0s) | C | 60 | 17.8 |\n 18671 | 2023-08-13 00:07:52 | MASTER-Tavrida | (16h 33m 50.96s , +46d 35m 56.8s) | C | 180 | 17.6 |\n 18694 | 2023-08-13 00:08:16 | MASTER-OAFA | (16h 39m 21.33s , +46d 14m 36.3s) | C | 180 | 18.2 |\n 18859 | 2023-08-13 00:11:00 | MASTER-Tavrida | (16h 33m 45.72s , +46d 34m 51.4s) | C | 180 | 17.7 |\n 19496 | 2023-08-13 00:22:38 | MASTER-Tavrida | (16h 25m 59.99s , +47d 36m 01.5s) | C | 60 | 17.6 |\n 19564 | 2023-08-13 00:23:45 | MASTER-Tavrida | (16h 25m 55.13s , +47d 35m 16.9s) | C | 60 | 17.6 |\n 20964 | 2023-08-13 00:46:06 | MASTER-OAFA | (16h 34m 57.91s , +47d 57m 55.1s) | C | 180 | 18.1 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxODg4NDM5LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.3OVC_HGJ6Er114tmJS-a5haMb33EecR-REyxLS_dFs8\n\n",
"published": "2023-08-13T01:00:46.820159Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-13T01:00:46.820177Z",
"modified": "2023-08-13T01:00:46.824177Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2551,
"topic": "igwn.gwalert",
"uuid": "5827d0a3-2fe6-470c-8e8d-292ac05566d8",
"title": "S230828o - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230828o/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230828o/view/"
},
"event": {
"far": 1.09883e-05,
"time": "2023-08-28T06:35:07.660Z",
"group": "Burst",
"search": "BBH",
"area_50": 812.4362485644098,
"area_90": 2509.487999181389,
"duration": 0.004753,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "a0005f32effea0d673363c8dae23fa42",
"classification": {},
"skymap_version": 0,
"central_frequency": 169.203461
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-28T06:40:54Z",
"superevent_id": "S230828o",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-28T06:40:55.764207Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-28T06:40:55.764227Z",
"modified": "2023-08-28T06:40:55.767964Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2065,
"topic": "igwn.gwalert",
"uuid": "e5f3fecc-afb4-445b-87c2-36bf9f726e73",
"title": "S230814r - INITIAL",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230814r/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230814r/view/"
},
"event": {
"far": 4.81025672627311e-08,
"time": "2023-08-14T06:19:20.458Z",
"group": "CBC",
"search": "AllSky",
"area_50": 973.5806284449537,
"area_90": 3752.481887739128,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.0,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "fe69603f8d8fe44a2effa8f0ce4d206b",
"classification": {
"BBH": 0.9316934799569384,
"BNS": 0.0,
"NSBH": 0.0,
"Terrestrial": 0.06830652004306159
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "INITIAL",
"sequence_num": 3,
"time_created": "2023-08-14T07:19:33Z",
"superevent_id": "S230814r",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-14T07:19:34.643840Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-14T07:19:34.643871Z",
"modified": "2023-08-14T07:19:34.652612Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2066,
"topic": "gcn.circular",
"uuid": "e0498431-40f9-440c-acc7-ec5c8a00ac7b",
"title": "LIGO/Virgo/KAGRA S230814r: Identification of a GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "U. Deka at International Centre for Theoretical Sciences <uddeepta.deka@ligo.org>",
"data": {
"date": "23/08/14 07:49:50 GMT",
"from": "U. Deka at International Centre for Theoretical Sciences <uddeepta.deka@ligo.org>",
"title": "GCN CIRCULAR",
"number": "34411",
"subject": "LIGO/Virgo/KAGRA S230814r: 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 S230814r during\nreal-time processing of data from LIGO Hanford Observatory (H1) and\nLIGO Livingston Observatory (L1) at 2023-08-14 06:19:20.458 UTC (GPS\ntime: 1376029178.458). The candidate was found by the CWB [1], GstLAL\n[2], oLIB [3], PyCBC Live [4], and SPIIR [5] analysis pipelines.\n\nS230814r is an event of interest because its false alarm rate, as\nestimated by the online analysis, is 4.8e-08 Hz, or about one in 7\nmonths. The event's properties can be found at this URL:\n\nhttps://gracedb.ligo.org/superevents/S230814r\n\nThe classification of the GW signal, in order of descending\nprobability, is BBH (93%), Terrestrial (7%), 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 either of the binary components lies between 3 and 5 solar masses\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 [7], distributed via GCN notice about 26 seconds after the\ncandidate event time.\n * bayestar.multiorder.fits,2, 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,2. For\nthe bayestar.multiorder.fits,2 sky map, the 90% credible region is\n3753 deg2. Marginalized over the whole sky, the a posteriori\nluminosity distance estimate is 5634 +/- 2023 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\nhttps://emfollow.docs.ligo.org/userguide/.\n\n [1] Klimenko et al. PRD 93, 042004 (2016)\n [2] Tsukada et al. arXiv:2305.06286 (2023) and Ewing et al.\narXiv:2305.05625 (2023)\n [3] Lynch et al. PRD 95, 104046 (2017)\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\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxOTk5Mzk1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.-E3E4rVcMY57Et9tJu5M3HMf_-miA07w6da6p8oiSCQ\n\n",
"published": "2023-08-14T07:50:04.211812Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-14T07:50:04.211832Z",
"modified": "2023-08-14T07:50:04.218279Z",
"nonlocalizedevents": [
{
"event_id": "S230814r"
}
],
"targets": []
},
{
"id": 2123,
"topic": "hermes.message",
"uuid": "d7864d97-c47e-480a-9fa1-432e1452a5e4",
"title": "INTEGRAL follow-up of S230816t",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230816t at 2023-08-16T08:54:40.000\n\n\nSPI-ACS excesses:\nat T0+43.94 FAP = 0.143\nat T0+-66.43 FAP = 0.35\nat T0+8.82 FAP = 0.513\nat T0+-21.08 FAP = 0.577\nat T0+153.54 FAP = 0.923\nat T0+141.62 FAP = 0.924\n\n\n\n\nnext break in data in 50 hr: 2023-08-18T11:16:02, for about 9 hr",
"published": "2023-08-16T09:12:48.661956Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-08-16T09:12:48.661973Z",
"modified": "2023-08-16T09:12:48.666131Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2029,
"topic": "gcn.circular",
"uuid": "92bb39e7-7953-46d7-b724-b50b1b0c7c08",
"title": "GRB 230812B: KAIT Optical Afterglow Candidate",
"submitter": "Hop gcn.circular",
"authors": "Weikang Zheng at UC Berkeley <weikang@berkeley.edu>",
"data": {
"date": "23/08/13 05:26:37 GMT",
"from": "Weikang Zheng at UC Berkeley <weikang@berkeley.edu>",
"title": "GCN CIRCULAR",
"number": "34395",
"subject": "GRB 230812B: KAIT Optical Afterglow Candidate"
},
"message_text": "WeiKang Zheng and Alexei V. Filippenko (UC Berkeley) report on\n\nbehalf of the KAIT GRB team:\n\n\n\nThe 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at\n\nLick Observatory, responded to GRB 230812B (The Fermi GBM team,\n\nGCN 34386) starting at Aug. 13, 04:42:53 UT. We detected an uncataloged\n\noptical afterglow candidate not shown in SDSS archive at position\n\nof (error ~0.5\"):\n\n\nRA: 16:36:31.52 (J2000)\n\nDec: +47:51:32.24 (J2000)\n\n\nThis position is about 7.4 arcsec to the improved Swift/XRT\n\nlocalization (Page et al., GCN 34393), which is slightly outside its\n\nestimate 3.7 arcseconds error radius. We measure the target is\n\n~18.7 in out clear band image at ~9.75 hours after burst. We can\n\nnot estimate the variability at this time, further observations\n\nare encouraged.\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxOTA0NDAzLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.JJDBsUkWZ7ohRPMn-2jZVO6Wo_JKmuiOmd6-SztnOwg\n\n",
"published": "2023-08-13T05:26:48.111805Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-13T05:26:48.111822Z",
"modified": "2023-08-13T05:26:48.115715Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2030,
"topic": "gcn.circular",
"uuid": "d395f2a8-0893-47a4-997f-e51ac4624984",
"title": "Fermi GRB 230812B: MASTER optical counterpart",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/08/13 05:28:50 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "34396",
"subject": "Fermi GRB 230812B: MASTER optical counterpart"
},
"message_text": "\nV.Lipunov (Lomonosov MSU),\nD.Svinkin (Ioffe Institute),\nA.Kuznetsov, A.Sosnovskiy, N.Tiurina, E.Gorbovskoy, Ya.Kechin, P.Balanutsa, K.Zhirkov,\nO.Gress, A.Chasovnikov, G.Antipov, D.Vlasenko, V.Senik, V.Topolev, Yu.Tselik, Siyu Wu, D.Cheryasov, V.Shumkov, T.Pogrosheva (Lomonosov Moscow State University,SAI,Physics Department),\nC.Francile, F. Podesta, C.Lopez, R. Podesta (Observatorio Astronomico Felix Aguilar OAFA),\nD.Buckley (SAAO),\nR. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias),\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino\nAlvarez,J.Martinez,A.Corella,L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory),\nN.M.Budnev, O.Gress (ISU,API),\nA.Gabovich, V.Yurkov (BSPU),\nA. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),\n\nMASTER started Fermi GRB 230812B (Fermi GBM team GCN 34386, Ttrigger\u0018:58:12,\nLesage et al. GCN 34387, Evans et al. GCN 34388, Scotton et al. GCN 34387, Roberts et al. GCN 34391)\nat MASTER-SAAO (Lipunov et al GCN 34389, see covermap, near horizont; GCN 34390) by MASTER-II and MASTER very wide field cameras (Lipunov et al. 2010)\n\nFermi GBM error-box was covered by MASTER-SAAO, MASTER-Tavrida (since 2023-08-12 21:56:45 UT), MASTER-OAFA.\n\nThere is optical counterpart at\nR.A.,Dec.2000= 16 36 31.48 +47 51 35.14\nwith m\u0018.2 at several set of images.\n\nthat is in ~18\" of Swift-XRT preliminary counterpart (Swift GCN 34393)\n\nWe observed it till sunrise in MASTER-Tavrida , reduction will be continued.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxOTA0NTMyLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.WLSK-x_p5dMhKrYV99yDPKh9AgVxHELv3nuPF0MBd98\n\n",
"published": "2023-08-13T05:28:58.361519Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-13T05:28:58.361538Z",
"modified": "2023-08-13T05:28:58.365855Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2031,
"topic": "gcn.circular",
"uuid": "903df198-ef77-4fd3-b8c7-a4950046706f",
"title": "GRB 230812B: Zwicky Transient Facility Identifies Optical Afterglow Candidate of a Fermi GRB (Trigger 713559497)",
"submitter": "Hop gcn.circular",
"authors": "Anirudh Salgundi <salgundi.anirudh@gmail.com>",
"data": {
"date": "23/08/13 08:02:28 GMT",
"from": "Anirudh Salgundi <salgundi.anirudh@gmail.com>",
"title": "GCN CIRCULAR",
"number": "34397",
"subject": "GRB 230812B: Zwicky Transient Facility Identifies Optical Afterglow Candidate of a Fermi GRB (Trigger 713559497)"
},
"message_text": "Anirudh Salgundi (IITB), Vishwajeet Swain (IITB), Harsh Kumar (IITB), Tomas Ahumada (CIT), Robert Stein (CIT), Igor Andreoni (UMD), Michael Coughlin (UMN), Shreya Anand (CIT), Viraj Karambelkar (CIT), Mansi Kasliwal (CIT), Avery Wold (IPAC), Theophile du Laz (CIT), Simeon Reusch (DESY), Igor Andreoni (UMD), Eric Bellm (UW), Varun Bhalerao (IITB), Brad Cenko (UMD), Brian Healy (UMN), David Kaplan (UWM), Jannis Necker (DESY), D. Perley (LJMU) report on behalf of the ZTF and GROWTH collaborations:\n\nWe observed the localization region of the GRB 230812B (trigger 713559497, GCN 34386) detected by the Gamma-Ray Burst Monitor (GBM) on the Fermi satellite with the 47 square-degree Zwicky Transient Facility (ZTF) camera (Graham et al., 2019; Bellm et al., 2019). We obtained images in the g-, and r- covering 420 square degrees beginning at 2023-08-13 03:34:57 (~8.5 hours after the burst trigger time). This corresponds to ~78% of the probability enclosed in the Earth-occultation corrected GRB localization map. Each exposure was 300 seconds with median depths of 21.9 mag in both g-band and r-band. The images were processed in real-time through the ZTF reduction and image subtraction pipelines at IPAC (Masci et al. 2019).\n\nWe queried the ZTF alert stream using Kowalski (Duev et al. 2019) through Fritz (Coughlin et al. 2023). 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 GBM trigger. Close to 40 sources were time and spatially coincident with the burst, most of them showing g-r ~ 0 mag and a slow evolution.\n\n\nWe recover the candidate afterglow reported in Zheng et al. (GCN 34395) and Lipunov et al. (GCN 34396), and we highlight its rapid evolution: r-band decay rate ~2 mag/day. We note that this source is ~6\" from the source circulated in Page et al. (GCN 34394) detected by the Neil Gehrels Swift Observatory.\n\nWe additionally crossmatched the optical candidates to the Swift sources circulated and in Evans et al (GCN 34388, http://www.swift.ac.uk/xrt_products/TILED_GRB00115) and we find no other coincidences.\n\nThe details of the afterglow candidate in the table below:\n\nZTF name , AT name , UT first alert , t-t0 (days) , filter , mag (AB) , mag error (AB)\n-----------------------------------------------------------------\nZTF23aaxeacr , AT 2023pel , 2023-08-13 03:34:56 , 0.35 , r , 18.85 , 0.04\nZTF23aaxeacr , AT 2023pel , 2023-08-13 04:24:05 , 0.39 , g , 19.19 , 0.02\n\n\nWe encourage further follow-up.\n\n\nZTF and GROWTH are worldwide collaborations comprising Caltech, USA; IPAC, USA, WIS, Israel; OKC, Sweden; JSI/UMd, USA; U Washington, USA; DESY,\nGermany; MOST, Taiwan; UW Milwaukee, USA; LANL USA; Tokyo Tech, Japan; IITB, India; IIA, India; LJMU, UK; TTU, USA; SDSU, USA and USyd, Australia.\nZTF acknowledges the generous support of the NSF under AST MSIP Grant No 1440341.\nGROWTH acknowledges generous support of the NSF under PIRE Grant No 1545949.\nAlert distribution service provided by DIRAC@UW (Patterson et al. 2019).\nAlert database searches are done by AMPEL (Nordin et al. 2019) and Kowalski (Duev et al. 2019). The 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\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxOTEzNzUzLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.cQCXVElUNfpiXP6mg79DhEqNJTSgR2nl_kpfjPjlIGw\n\n",
"published": "2023-08-13T08:02:39.842724Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-13T08:02:39.842743Z",
"modified": "2023-08-13T08:02:39.848891Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2032,
"topic": "gcn.circular",
"uuid": "3866f0b7-8a38-4d6e-897c-a6b985cc6223",
"title": "GOTO confirmation and possible host galaxy of GRB230812B optical afterglow",
"submitter": "Hop gcn.circular",
"authors": "ackleyastro@gmail.com",
"data": {
"date": "23/08/13 08:19:47 GMT",
"from": "ackleyastro@gmail.com",
"title": "GCN CIRCULAR",
"number": "34398",
"subject": "GOTO confirmation and possible host galaxy of GRB230812B optical afterglow"
},
"message_text": "K. Ackley; B. P. Gompertz; B. Godson; S. Belkin; D. O'Neill; A. Levan; T. Killestein; G. Ramsay; D. Malesani; R. Starling; M. J. Dyer; J. Lyman; K. Ulaczyk; F. Jiminez-Ibarra; A. Kumar; D. Steeghs; D. K. Galloway; V. Dhillon; P. O'Brien; K. Noysena; R. Kotak; R. P. Breton; L. K. Nuttall; E. Pall'e and D. Pollacco report on behalf of the GOTO collaboration:\n\nWe report on observations with the Gravitational-wave Optical Transient Observer (GOTO; Steeghs et al. 2022) in response to GRB 230812B (Page et al. GCN 34394, Scotton et al. GCN 34392, Lesage et al. GCN 34391). We covered the field of the X-ray (Swift, Page et al. GCN 34394) and optical (KAIT Zheng et al. GCN 34395, MASTER Lipunov et al. GCN 34396) candidate afterglow. The field was observed several times between 21:08:01 UT and 23:37:33 UT on 2023-08-12 (starting 2.16 hours after trigger). Each observation consisted of 4x90s exposures in the GOTO L-band (400-700 nm).\n\nImages were processed immediately after acquisition using the GOTO pipeline. We confirm the optical afterglow as reported by KAIT (Zheng et al. GCN 34395) with the first detection at 2.29 hours. Our observations show a clear decay as the source faded by approximately 0.76 magnitudes over 2.27 hours.\n\nObs Date | RA(J2000) | Dec(J2000) | Filter | Mag(AB)\n2023-08-12 21:15:40 | 249.13 | 47.86 | L | 17.45 +/- 0.02\n\nWe note the presence of an underlying extended source at the KAIT localisation in PS1 imaging and deep HyperSuprimeCam imaging, and suggest it to be the host galaxy of GRB 230812B.\n\nMagnitudes were calibrated using ATLAS-REFCAT2 (Tonry et al. 2018) and are not corrected for Galactic extinction.\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), the University of Turku, the University of Portsmouth, the University of Manchester and the Instituto de Astrofisica de Canarias (IAC).\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxOTE0NzkzLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.3ftB3Nj0sBhR5lY0VeAHQUbaO9BMJIPcJ7UFNA6dpWg\n\n",
"published": "2023-08-13T08:19:58.481138Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-13T08:19:58.481155Z",
"modified": "2023-08-13T08:19:58.485074Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2033,
"topic": "gcn.circular",
"uuid": "4a04d607-9133-4703-bdfd-9d57abc4fcb7",
"title": "GRB 230812: Swift/UVOT Detection",
"submitter": "Hop gcn.circular",
"authors": "Paul Kuin at MSSL <npkuin@gmail.com>",
"data": {
"date": "23/08/13 09:01:24 GMT",
"from": "Paul Kuin at MSSL <npkuin@gmail.com>",
"title": "GCN CIRCULAR",
"number": "34399",
"subject": "GRB 230812: Swift/UVOT Detection"
},
"message_text": "Paul Kuin (MSSL/UCL) report on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 230812\n25418 s after the GBM trigger (Roberts et al., GCN Circ. 34391).\nThe Fermi LAT also detected the trigger (Scotton et al, GCN Circ. 34392).\nAn candidate optical counterpart was reported (Zheng & Filippenko, GCN\nCirc.\n34395; Lipunov et al., GCN Circ 34396; Salgundi et al., GCN Circ. 34397)\nnear the reported XRT candidate (Kennea, GCN Circ. 34393, Page, GCN Circ.\n34394). A source consistent with the XRT position is detected in the UVOT\nexposures.\n\nPreliminary detections using the UVOT photometric system\n(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures\nare:\n\nFilter T_start(s) T_stop(s) Exp(s) Mag\n\nwhite 25418 31151 390 20.48 +/- 0.18\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.024 in the direction of the burst\n(Schlegel et al. 1998).\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxOTE3MjkwLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.WfvfMXguaDQa138lZPu8c5aEMwCfT7IibC01pGyLGs8\n\n",
"published": "2023-08-13T09:01:34.807408Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-13T09:01:34.807429Z",
"modified": "2023-08-13T09:01:34.811119Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2554,
"topic": "igwn.gwalert",
"uuid": "653a5b3b-db4a-443c-9833-5d38616f41c7",
"title": "S230828ah - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230828ah/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230828ah/view/"
},
"event": {
"far": 3.368460966157727e-06,
"time": "2023-08-28T11:35:27.287Z",
"group": "CBC",
"search": "AllSky",
"area_50": 1372.6647567428638,
"area_90": 5690.4109145317125,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 0.7433182562544636,
"HasMassGap": 0.024916747524506143,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "ab5422905121529d54928bbfc5c97722",
"classification": {
"BBH": 0.048273817416677973,
"BNS": 0.0,
"NSBH": 0.17727461131489347,
"Terrestrial": 0.7744515712684286
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-28T11:35:52Z",
"superevent_id": "S230828ah",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-28T11:35:53.066216Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-28T11:35:53.066238Z",
"modified": "2023-08-28T11:35:53.070908Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4058,
"topic": "gcn.circular",
"uuid": "0219781f-f5ea-42ac-81e3-ad24b21d9dce",
"title": "GRB 231020A: BALROG localization (Fermi Trigger / GRB 231020790)",
"submitter": "Hop gcn.circular",
"authors": "Jochen Greiner at MPE <jcgrog@mpe.mpg.de>",
"data": {
"date": "23/10/20 21:23:35 GMT",
"from": "Jochen Greiner at MPE <jcgrog@mpe.mpg.de>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34861"
},
"title": "GCN CIRCULAR",
"number": "34861",
"subject": "GRB 231020A: BALROG localization (Fermi Trigger / GRB 231020790)"
},
"message_text": "T. Preis, B. Biltzinger, J. Burgess & J. Greiner (all MPE Garching) report:\n\nThe public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger\n at 18:56:58 on 20 Oct. 2023 were automatically fitted for spectrum\nand sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427;\nBerlato et al. 2019, ApJ 873, 60).\n\nThe best-fit position (1 sigma statistical errors) is:\nRA(2000.0) = 316.0+/-0.4 deg\nDecl.(2000.0) = -31.3+/-0.3 deg\nWe estimate an additional systematic error of 2 deg.\n\nFurther details are available at:\nhttps://grb.mpe.mpg.de/grb/GRB231020790/\n\nThe Healpix map can be downloaded from:\nhttps://grb.mpe.mpg.de/grb/GRB231020790/healpix\n\nThe location parameters are available as JSON at:\nhttps://grb.mpe.mpg.de/grb/GRB231020790/json\n\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34861.",
"published": "2023-10-20T21:23:47.058652Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-10-20T21:23:47.058684Z",
"modified": "2023-10-20T21:23:47.066800Z",
"nonlocalizedevents": [],
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{
"id": 2951,
"topic": "gcn.circular",
"uuid": "44d77897-0fb3-4d2b-bea1-0eb9c076e4af",
"title": "GRB 230911A: GOTO optical counterpart candidate",
"submitter": "Hop gcn.circular",
"authors": "Sergey Belkin at Monash University <sergey.belkin@monash.edu>",
"data": {
"date": "23/09/13 10:07:56 GMT",
"from": "Sergey Belkin at Monash University <sergey.belkin@monash.edu>",
"title": "GCN CIRCULAR",
"number": "34681",
"subject": "GRB 230911A: GOTO optical counterpart candidate"
},
"message_text": "S. Belkin; B. P. Gompertz; A. Kumar; K. Ackley; K. Wiersema; D. OâNeill; T. Killestein; R. Starling; M. J. Dyer; J. Lyman; K. Ulaczyk; F. Jimenez-Ibarra; D. Steeghs; D. K. Galloway; V. Dhillon; P. O'Brien; G. Ramsay; K. Noysena; R. Kotak; R. P. Breton; L. K. Nuttall; E. Pall'e and D. Pollacco report on behalf of the GOTO collaboration:\n\nWe report on observations with the Gravitational-wave Optical Transient Observer (GOTO; Steeghs et al. 2022) in response to GRB 230911A (Fermi GBM team, GCN 34652). Observations were performed by GOTO North and South between 04:19:47 UT on 2023-09-11 and 17:08:39 UT on 2023-09-12 (1.17 to 37.98 hours after trigger). Each observation consisted of 4x90s exposures in the GOTO L-band (400-700 nm).\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\nWe identify one candidate optical counterpart consistent within the GBM 90% localisation region. We find no evidence of this source prior to the GRB trigger time in previous GOTO observations, the ZTF observations provided by the Lasair broker (Smith et al. 2019), or the ATLAS forced photometry server (Shingles et al. 2021). However, we caution that the last available observation of the field was taken by ATLAS nine days before the GRB trigger.\n\nName | RA(J2000) | Dec(J2000) | Filter | Mag(AB) | t - trig(hrs)\n\nGOTO23akf | 03:50:00.51 | -29:49:30.66 | L | 19.22 +/- 0.10 | 1.17 \n\nThis source is seen to decay as a power-law with an index of 0.61 +/- 0.07 across 7 epochs of observations. No object is present at this position in the Legacy Survey (Dey et al. 2019).\n\nMagnitudes were calibrated using ATLAS-REFCAT2 (Tonry et al. 2018) and are not corrected for Galactic extinction.\n\nGOTO (https://goto-observatory.org) is a network of telescopes that is principally funded by the STFC and 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), the University of Turku, the University of Portsmouth, the University of Manchester and the Instituto de Astrofisica de Canarias (IAC).\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34681.\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjk0NTk5NjgyLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.smFwR8EMOEOuAm3OTPEDHHr0ai7BRP-4M6G5AqVeoW4\n\n",
"published": "2023-09-13T10:08:15.526456Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-09-13T10:08:15.526478Z",
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{
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"topic": "lvk-users.beccatest",
"uuid": "98db297e-c033-40ce-960e-caa2f89cc05e",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
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"message_text": "",
"published": "2024-05-23T14:16:39.687138Z",
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"retracted": false,
"created": "2024-05-23T14:16:39.687158Z",
"modified": "2024-05-23T14:16:39.687166Z",
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"id": 2040,
"topic": "igwn.gwalert",
"uuid": "a8242dfc-915c-422f-8232-8a116db70a4a",
"title": "S230813ar - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"time": "2023-08-13T11:30:58.060Z",
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"sequence_num": 1,
"time_created": "2023-08-13T11:31:22Z",
"superevent_id": "S230813ar",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-13T11:31:23.698529Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-13T11:31:23.698550Z",
"modified": "2023-08-13T11:31:23.702352Z",
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{
"id": 2041,
"topic": "igwn.gwalert",
"uuid": "3d51b631-4732-4e02-beaa-1d27d367c2fe",
"title": "S230813ar - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"time": "2023-08-13T11:30:58.060Z",
"group": "CBC",
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"area_50": 1759.9987740078172,
"area_90": 6762.188899466373,
"duration": null,
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"sequence_num": 2,
"time_created": "2023-08-13T11:35:56Z",
"superevent_id": "S230813ar",
"external_coinc": null
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"message_text": "",
"published": "2023-08-13T11:35:58.428736Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-13T11:35:58.428756Z",
"modified": "2023-08-13T11:35:58.432494Z",
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{
"id": 2042,
"topic": "gcn.circular",
"uuid": "f3743047-d4b4-4ffa-853a-c6f6a5fb426f",
"title": "GRB230812B: AGILE/MCAL detection",
"submitter": "Hop gcn.circular",
"authors": "Claudio Casentini at INAF-IAPS <claudio.casentini@inaf.it>",
"data": {
"date": "23/08/13 11:45:31 GMT",
"from": "Claudio Casentini at INAF-IAPS <claudio.casentini@inaf.it>",
"title": "GCN CIRCULAR",
"number": "34402",
"subject": "GRB230812B: AGILE/MCAL detection"
},
"message_text": "C. Casentini (INAF/IAPS), F. Longo (Univ. Trieste and INFN Trieste), C. Pittori,\nF. Verrecchia (SSDC, and INAF/OAR), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata),\nA. Ursi (ASI and INAF/IAPS), A. Argan, M. Cardillo, Y. Evangelista, L. Foffano,\nG. Piano (INAF/IAPS), A. Addis, L. Baroncelli, A. Bulgarelli, A. Ciabattoni, A. Di Piano,\nV. Fioretti, G. Panebianco, N. Parmiggiani (INAF/OAS-Bologna), F. Lucarelli\n(SSDC, and INAF/OAR), M. Marisaldi (INAF/OAS-Bologna, and Bergen University), M. Pilia,\nA. Trois (INAF/OA-Cagliari), I. Donnarumma, E. Menegoni (ASI), A. Giuliani (INAF/IASF-Mi),\nP. W. Cattaneo (INFN Pavia), F. Cutrona (Univ. Milano Bicocca) and P. Tempesta\n(TeleSpazio) report on behalf of the AGILE Team:\n\nThe AGILE satellite detected the GRB 230812B at T0 = 2023-08-12 18:58:12 s (UTC),\nreported by Fermi (GCNs #34386, #34387, #34391, #34392), Swift (GCNs #34388, #34393,\n#34394, #34395, #34399, #34400) and MASTER (GCNs #34389, #34396).\n\nThe event lasted about 8 s and it released a total number of 17046 counts in the MCAL\ndetector (above a background rate of 590 Hz) and 97310 counts in the AC-Top detector\n(above a background rate of 3188 Hz). The AGILE ratemeters light curves can be found\nat http://www.agilescienceapp.it/notices/GRB230812B_AGILE_RM_ND.png .\n\nThe event also triggered a high time resolution MCAL data acquisition,\nfrom T0 s to T0+2 s (UTC), and released 12643 counts in the detector, above\na background rate of 561 Hz. The MCAL light curve can be found\nat http://www.agilescienceapp.it/notices/GRB230812B_084865_618951492.000000.png .\n\nAt the T0, the event was 55 deg off-axis.\n\nAdditional analysis of AGILE data is in progress. Automatic MCAL GRB alert Notices\ncan be found at: https://gcn.gsfc.nasa.gov/agile_mcal.html\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxOTI3MTM3LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.Qj3ebcRWA2flA6Eav0QWPrmp9C_OXo08NFnSIYTGrUQ\n\n",
"published": "2023-08-13T11:45:42.822371Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-13T11:45:42.822387Z",
"modified": "2023-08-13T11:45:42.826166Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2556,
"topic": "gcn.circular",
"uuid": "b663b39a-3471-4d67-8fad-766b13ef2ca3",
"title": "GRB 230827B / GRB 230827256: Fermi GBM Observation",
"submitter": "Hop gcn.circular",
"authors": "rachel.hamburg@ijclab.in2p3.fr",
"data": {
"date": "23/08/28 13:52:48 GMT",
"from": "rachel.hamburg@ijclab.in2p3.fr",
"title": "GCN CIRCULAR",
"number": "34584",
"subject": "GRB 230827B / GRB 230827256: Fermi GBM Observation"
},
"message_text": "R. Hamburg (CNRS/IJCLab) and C. Meegan (UAH) report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"At 06:08:30.73 UT on 27 August 2023, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 230827B (trigger 714809315/230827256).\nThe optical afterglow of GRB 230827B was also detected by ZTF (GCN 34574),\nGIT (GCN 34576), and AKO (GCN 34579). The location of the afterglow is\nconsistent with the GBM on-ground calculated location, which is\nRA = 299.32, Dec = +56.47 (J2000 degrees, equivalent to\nJ2000 19h 57m 17s, +56d 28' 12\"), with a statistical\nuncertainty of 2.17 degrees.\n\nThe angle from the Fermi LAT boresight is 140 degrees.\n\nThe GBM light curve shows a multi-peaked lightcurve with a duration (T90)\nof about 11 s (50-300 keV). The time-averaged spectrum\nfrom T0+0.002 to T0+10.240 s is best fit by\na power law function with an exponential high-energy cutoff.\nThe power law index is -1.37 +/- 0.05 and the cutoff energy,\nparameterized as Epeak, is 352 +/- 52 keV.\nA Band function fits the spectrum equally well\nwith Epeak= 256 +/- 51 keV, alpha = -1.28 +/- 0.08 and beta = -2.2 +/- 0.2.\n\nThe event fluence (10-1000 keV) in this time interval is\n(1.08 +/- 0.04)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+4.7 s in the 10-1000 keV band is 16.4 +/- 0.9 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\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkzMjMwNzczLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.4t8rxbipWlLU5S8kUeDpKi5Il8WzV88xMBHyBRxoLu0\n\n",
"published": "2023-08-28T13:52:58.835235Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-28T13:52:58.835253Z",
"modified": "2023-08-28T13:52:58.839043Z",
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{
"id": 2557,
"topic": "igwn.gwalert",
"uuid": "f6401eaf-2911-4e0a-bf8e-e196b7892e77",
"title": "S230828ap - PRELIMINARY",
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{
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"topic": "igwn.gwalert",
"uuid": "b9bf4c99-98d9-4e4b-b6ff-09063e2edba1",
"title": "S230828ap - PRELIMINARY",
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"topic": "igwn.gwalert",
"uuid": "ca7fcaa5-1c96-4466-b501-6762ba5a211c",
"title": "S231028r - PRELIMINARY",
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"published": "2023-10-31T23:27:54.883977Z",
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"retracted": false,
"created": "2023-10-31T23:27:54.884004Z",
"modified": "2023-10-31T23:27:54.889086Z",
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{
"id": 11729,
"topic": "lvk-users.beccatest",
"uuid": "8567f82f-2b07-4b24-be38-3dfcd22f5a38",
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"published": "2024-05-24T23:31:38.489236Z",
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"created": "2024-05-24T23:31:38.489248Z",
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{
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"topic": "igwn.gwalert",
"uuid": "39641890-3a3d-41f3-ae28-dd9ee48b418b",
"title": "S230813ax - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
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"data": {
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"time_created": "2023-08-13T14:54:15Z",
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{
"id": 2049,
"topic": "igwn.gwalert",
"uuid": "15824640-4723-433f-af8f-ce5d1acbb298",
"title": "S230813az - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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{
"id": 2050,
"topic": "igwn.gwalert",
"uuid": "17ccf1c4-d5c8-46f7-8619-1e40fd1abd2b",
"title": "S230813az - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"time_created": "2023-08-13T15:28:01Z",
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"published": "2023-08-13T15:28:02.548097Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-13T15:28:02.548120Z",
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{
"id": 2051,
"topic": "gcn.circular",
"uuid": "8f58edfd-f364-43a6-8871-d16021ba0be0",
"title": "GRB 230812B: Detected Optical Afterglow Candidate",
"submitter": "Hop gcn.circular",
"authors": "Mohammad Odeh at Al Khatim Observatory M44 <mshodeh@gmail.com>",
"data": {
"date": "23/08/13 17:32:55 GMT",
"from": "Mohammad Odeh at Al Khatim Observatory M44 <mshodeh@gmail.com>",
"title": "GCN CIRCULAR",
"number": "34405",
"subject": "GRB 230812B: Detected Optical Afterglow Candidate"
},
"message_text": "Mohammad Odeh, Osama Ghannam, Anas Mohammad, Khalfan Al-Noaimy, and Sameh\nAl-Ashi, report on behalf of Al-Khatim Observatory (AKO) operated by the\nInternational Astronomical Center in Abu Dhabi, UAE:\n\n\n\nWe observed the field of GRB 230812B (Lesage et al., GCN 34387; Scotton et\nal., GCN 34392; Page, GCN 34394; Zheng & Filippenko, GCN 34395; Lipunov et\nal., GCN 34396; Salgundi et al., GCN 34397; Ackley et al., GCN 34398; Xiong\net al., GCN 34401; Casentini et al., GCN 34002; Frederiks et al., GCN\n34403; Mao et al., GCN 34404), with our 0.36m f/7.7 robotic telescope. The\nobservation was done on 13 August 2023 from 16:15 to 16:47 (UT), about 21.6\nhours from the trigger.\n\n\n\nWe obtained multiple 180-sec exposures in Ic filter. We detected an optical\nafterglow candidate at:\n\nR.A. (J2000): 16:36:31.45\n\nDec. (J2000): +47:51:32.3\n\n\n\nThat is the same localization of (Zheng & Filippenko, GCN 34395), which is\nabout 5.5 arcsec from the improved Swift/XRT localization (Page, GCN 34394).\n\n\n\nThe following observation was calculated using Atlas catalogue as a\nreference:\n\n-----------------------------------------------------------------------------\n\nObsTime (mid), Exposure (sec), Filter, Mag\n\n-----------------------------------------------------------------------------\n\n2023-08-13T16:32:40Z, 10 x 180s (stacked), Ic, 18.8 +/- 0.21\n\n-----------------------------------------------------------------------------\n\n\n\nThe magnitude is not corrected for galactic extinction.\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxOTQ3OTgxLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.vqj1Va68y8BpDMV_-r-gELy2FUStRdBSdvmcKFnaQ9I\n\n",
"published": "2023-08-13T17:33:11.424912Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-13T17:33:11.424931Z",
"modified": "2023-08-13T17:33:11.429679Z",
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{
"id": 2124,
"topic": "igwn.gwalert",
"uuid": "c6ffd059-70de-489f-9c3a-0010bdf12aaf",
"title": "S230816v - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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{
"id": 2125,
"topic": "igwn.gwalert",
"uuid": "cee1fc1f-f191-4eb8-8bb0-110e92f26083",
"title": "S230816v - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"published": "2023-08-16T10:02:31.672803Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-16T10:02:31.672823Z",
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},
{
"id": 6293,
"topic": "gcn.circular",
"uuid": "996c170c-3738-4e48-bac4-231e9151d824",
"title": "GRB 240328C: Glowbug gamma-ray detection",
"submitter": "Hop gcn.circular",
"authors": "C.C. Cheung at Naval Research Lab <Teddy.Cheung@nrl.navy.mil>",
"data": {
"date": "24/03/28 20:59:17 GMT",
"from": "C.C. Cheung at Naval Research Lab <Teddy.Cheung@nrl.navy.mil>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/35988"
},
"title": "GCN CIRCULAR",
"number": "35988",
"subject": "GRB 240328C: Glowbug gamma-ray detection"
},
"message_text": "C.C. Cheung, R. Woolf, M. Kerr, J.E. Grove (NRL), A. Goldstein (USRA), C.A. Wilson-Hodge, D. Kocevski (MSFC), and M.S. Briggs (UAH) report:\n \nThe Glowbug gamma-ray telescope [1,2], operating on the International Space Station, reports the detection of GRB 240328C.\n\nUsing an adaptive window with a resolution of 32-ms, the burst onset is determined to be 2024-03-28 00:37:54.024 with a duration of 4.1 s and a total significance of about 16.9 sigma. The light curve comprises a single peak.\n\nUsing a standard power-law function with an exponential high-energy cutoff [3] to model the emission over this duration results in a poorly constrained power-law index and a cutoff energy (\"Epeak\") of 213 keV. The modeled 10-10000 keV fluence is 5.3e-07 erg/cm^2.\n\nThe best-fit localization is RA, Decl. (J2000, deg) = 165.0, 30.6 with a radius of 27.8 deg (95% confidence), with a highly uncertain systematic uncertainty.\n\nThe analysis results presented here are preliminary and use a response function that lacks a detailed characterization of the surrounding passive structure of the ISS.\n \nGlowbug is a NASA-funded technology demonstrator for sensitive, low-cost gamma-ray transient telescopes developed, built, and operated by the U.S. Naval Research Laboratory (NRL) with support from the University of Alabama in Huntsville, USRA, and NASA MSFC. It was launched on 2023 March 15 aboard the Department of Defense Space Test Programâs STP-H9 to the ISS. The detector comprises 12 large-area (15 cm x 15 cm) CsI:Tl panels covering the surface of a half cube, and two hexagonal (5-cm diameter, 10-cm length) CLLB scintillators, giving it a large field of view (instantaneous FoV ~2/3 sky) over a wide energy band of 50 keV to >2 MeV.\n \n[1] Grove, J.E. et al. 2020, Proc. Yamada Conf. LXXI, arXiv:2009.11959\n[2] Woolf, R.S. et al. 2022, Proc. SPIE, 12181, id. 121811O\n[3] Goldstein, A. et al. 2020, ApJ 895, 40, arXiv :1909.03006\n \nDistribution Statement A: Approved for public release. Distribution is unlimited.\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35988.",
"published": "2024-03-28T20:59:32.349950Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-03-28T20:59:32.349968Z",
"modified": "2024-03-28T20:59:32.357217Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 11732,
"topic": "lvk-users.beccatest",
"uuid": "255b0725-6d92-48f2-8916-c726160dfb0a",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"H1"
],
"time": [
1400628800
],
"range": 151.15789689746705
},
"message_text": "",
"published": "2024-05-24T23:33:17.848766Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-24T23:33:17.848782Z",
"modified": "2024-05-24T23:33:17.848789Z",
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"targets": []
},
{
"id": 2067,
"topic": "gcn.circular",
"uuid": "6d2fe56b-c2c6-4090-b3dd-f2757fdefcc8",
"title": "GRB 230812B: AbAO optical observations",
"submitter": "Hop gcn.circular",
"authors": "Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>",
"data": {
"date": "23/08/14 08:02:51 GMT",
"from": "Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>",
"title": "GCN CIRCULAR",
"number": "34412",
"subject": "GRB 230812B: AbAO optical observations"
},
"message_text": "S. Belkin (IKI), R. Ya. Inasaridze (AbAO), A. Pozanenko (IKI), N.\nPankov (HSE, IKI) report on behalf of GRB IKI FuN:\n\nWe observed the field of GRB 230812B (Fermi GBM Team, GCN 34386; Scotton et al., GCN 34392; Page et al. GCN 34394; Kuin et al., GCN 34399; Casentini et al., GCN 34402) with AS-32 telescope of Abastumani observatory (AbAO) in R-filter starting on Aug. 13 (UT) 17:32:00. We detected the afterglow (Lesage et al., GCN 34387; Scotton et al., GCN 34392; Page, GCN 34394; Zheng & Filippenko, GCN 34395; Lipunov et al., GCN 34396; Salgundi et al., GCN 34397; Ackley et al., GCN 34398; Xiong et al., GCN 34401; Casentini et al., GCN 34402; Frederiks et al., GCN 34403; Mao et al., GCN 34404; Odeh et al., GCN 34405; Moskvitin et al., GCN 34406; Leonini et al., GCN 34408; de Ugarte Postigo et al., GCNs 24409, 34410) in the stacked image. Preliminary photometry of the object is following\n\nDate UT start t-T0 Filter Exp. OT Err. UL(3sigma)\n (mid, days) (s)\n\n2023-08-13 17:32:00 0.97336 R 54*60 20.35 0.24 20.9\n\nThe photometry is based on nearby SDSS stars used in (Moskvitin et al, GCN 34406):\nRA DEC R (Lupton transformations)\n16:36:35.9365104 +47:52:54.574320 14.893 0.008\n16:36:32.6835360 +47:53:44.537784 16.531 0.009\n16:36:25.6055880 +47:53:20.456304 16.827 0.009\n16:36:25.1691816 +47:52:20.931816 16.068 0.008\n16:36:44.6580984 +47:50:56.806944 15.785 0.008\n16:36:40.1374488 +47:54:02.128752 15.698 0.008\n\nThe underlying extended source galaxy mentioned by GOTO (Ackley et al., GCN 34398) is visible in Legacy Survey DR10 Catalog with r~22.66 and classified as round exponential galaxy.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMDAwMTc2LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.ijDXpdXZ-8baoj3LX-XQJjZsPPx0wjobUgyAyiDVgYs\n\n",
"published": "2023-08-14T08:03:01.677164Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-14T08:03:01.677182Z",
"modified": "2023-08-14T08:03:01.683836Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2068,
"topic": "gcn.circular",
"uuid": "e11e509f-ed7d-46bd-8272-789ff21bb909",
"title": "GRB 230812B: OASDG optical observations",
"submitter": "Hop gcn.circular",
"authors": "luca.izzo@inaf.it",
"data": {
"date": "23/08/14 10:47:40 GMT",
"from": "luca.izzo@inaf.it",
"title": "GCN CIRCULAR",
"number": "34413",
"subject": "GRB 230812B: OASDG optical observations"
},
"message_text": "N. Ruocco, A. Catapano (OASDG) and L. Izzo (INAF-OACN & DARK/NBI) report:\n\nWe observed the field of GRB 230812B (Lesage et al. GCN 34387, Roberts et al. GCN 34391, Scotton et al. GCN 34392, Beardmore et al. GCN 34400, Xiong et al. GCN 34401, Casentini et al. GCN 34402, Frederiks et al. GCN 34403) with the 0.5m telescope of the Osservatorio Astronomico S. Di Giacomo located in Agerola, Italy ( https://osservatorio.astrocampania.it/ - MPC L07). We obtained multiple 300s images in the Rc filter under good weather conditions, with the first observation starting at MJD 60169.818 (1.027 days after the GRB detection).\n\nIn the final stacked image, we detect a faint source at the enhanced position reported by Swift-XRT (Beardmore et al. GCN 34400) and by optical telescopes (Zheng & Filippenko, GCN 34395, Lipunov et al., GCN 34396, Salgundi et al., GCN 34397, Ackley et al., GCN 34398, Kuin et al. GCN 34399, Mao et al., GCN 34404, Odeh et al., GCN 34405, Moskvitin et al., GCN 34406, Leonini et al., GCN 34408, de Ugarte Postigo et al. GCN 34409 & 34410, Belkin et al., GCN 34412). We measure a magnitude for the GRB afterglow of Rc(AB) = 20.51 +/- 0.16 mag. The calibration was performed using nearby stars in the Pan-STARRS PS1 catalog, and using transformation equations to Rc magnitudes. Further analyses are ongoing.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMDEwMDY1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.nX-x7368HYl2WAKyOX5RMlG9qvumut0Gx-WySeYz_0E\n\n",
"published": "2023-08-14T10:47:51.247417Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-14T10:47:51.247441Z",
"modified": "2023-08-14T10:47:51.251812Z",
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{
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"topic": "igwn.gwalert",
"uuid": "a7c8d1d8-0997-48b8-b16b-78b2babd8d4a",
"title": "S230829af - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"published": "2023-08-29T09:47:22.941260Z",
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"retracted": false,
"created": "2023-08-29T09:47:22.941282Z",
"modified": "2023-08-29T09:47:22.947329Z",
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{
"id": 2569,
"topic": "igwn.gwalert",
"uuid": "9f2565db-7a81-4f05-8357-5b2b97efbb06",
"title": "S230829af - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"published": "2023-08-29T09:51:55.799591Z",
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"modified": "2023-08-29T09:51:55.805139Z",
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{
"id": 2570,
"topic": "igwn.gwalert",
"uuid": "b5725cfa-e5c9-4efa-87ab-6517ade66a33",
"title": "S230829ah - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"time_created": "2023-08-29T10:19:23Z",
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"published": "2023-08-29T10:19:24.478547Z",
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{
"id": 4060,
"topic": "igwn.gwalert",
"uuid": "f5d1bd94-b05e-4bf0-8606-d4eec5546923",
"title": "S231021h - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"published": "2023-10-21T00:45:09.273613Z",
"message_parser": "IGWN Alert Avro Parser v1",
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{
"id": 11738,
"topic": "lvk-users.beccatest",
"uuid": "3442170b-5f20-492f-b327-e57216a7ee9d",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
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"message_text": "",
"published": "2024-05-24T23:36:38.343032Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-24T23:36:38.343046Z",
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{
"id": 2071,
"topic": "gcn.circular",
"uuid": "b93ac21e-fc94-4ba3-9215-32c9543c822c",
"title": "GRB 230812B: Faulkes Telescope North optical afterglow follow-up",
"submitter": "Hop gcn.circular",
"authors": "Manisha Shrestha at University of Arizona <mshrestha1@arizona.edu>",
"data": {
"date": "23/08/14 14:17:45 GMT",
"from": "Manisha Shrestha at University of Arizona <mshrestha1@arizona.edu>",
"title": "GCN CIRCULAR",
"number": "34416",
"subject": "GRB 230812B: Faulkes Telescope North optical afterglow follow-up"
},
"message_text": "M. Shrestha (Univ. of Arizona), D. Sand (Univ. of Arizona), K. D. Alexander (Univ. of Arizona), J. Andrews (Gemini), K. Bostroem (Univ. of Arizona), J. Pearson (Univ. of Arizona), G. Hosseinzadeh (Univ. of Arizona), N. Smith (Univ. of Arizona), D. A. Howell (LCO/UCSB), C. McCully (LCO/UCSB), M. Newsome (LCO/UCSB), E Padilla Gonzalez (LCO/UCSB), C. Pellegrino (LCO/UCSB), G. Terreran (LCO/UCSB), J. Farah (LCO/UCSB) report on behalf of a wider Global Supernova Project collaboration:\n\nWe observed the field of Swift GRB 230812B (Fermi GBM GCN 34386) with Faulkes Telescope North, on 2023-08-14 at 5:50:39 UT (60170.2435 MJD, ~1.45 days after the trigger) using the MuSCAT3 imager in the g,r, and i bands. Data were calibrated with respect to nearby SDSS sources.\n\nWe clearly detect the optical counterpart in the g,r, and i bands. The magnitudes are as follows:\ng = 21.38 +- 0.07\nr = 20.81 +- 0.04\ni = 20.71 +- 0.07\n\nThese values are not corrected for galactic extinction.\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMDIyNjcxLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.F1mXPgfGjZ-OcpWexCWTyKDs9A1SDwI1iJW19b3VzoE\n\n",
"published": "2023-08-14T14:17:56.575563Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-14T14:17:56.575582Z",
"modified": "2023-08-14T14:17:56.581270Z",
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{
"id": 2072,
"topic": "gcn.circular",
"uuid": "b20b89b6-80bb-43e0-a288-169c3c95a7a7",
"title": "GRB 230812B: Bassano Bresciano Observatory optical observations",
"submitter": "Hop gcn.circular",
"authors": "Ulisse Quadri at Bassano Bresciano Obs <oabb@ulisse.bs.it>",
"data": {
"date": "23/08/14 14:26:48 GMT",
"from": "Ulisse Quadri at Bassano Bresciano Obs <oabb@ulisse.bs.it>",
"title": "GCN CIRCULAR",
"number": "34417",
"subject": "GRB 230812B: Bassano Bresciano Observatory optical observations"
},
"message_text": "U.Quadri and L.Strabla (Bassano Bresciano Astronomical Observatory),\nin a large collaboration with:\nM.G. Dainotti (National Astronomical Observatory of Japan),\nY. Niino (Tokyo University, Institute of Astronomy),\nK. Kalinowski (Aarhus University, Department of Physics and Astronomy),\nB. De Simone (Universita' degli Studi Di Salerno)\nreport:\n\nWe imaged the field of GRB 230812B (Lesage et al., GCN 34387;\nScotton et al., GCN 34392; Page, GCN 34394; Zheng & Filippenko, GCN 34395;\nLipunov et al., GCN 34396; Salgundi et al., GCN 34397; Ackley et al., GCN 34398;\nXiong et al., GCN 34401; Casentini et al., GCN 34002; Frederiks et al., GCN 34403;\nMao et al., GCN 34404; Odeh et al., GCN 34405; Moskvitin et al., GCN 34406)\ndetected by FERMI(trigger 713559497.049606 / 230812790)\nwith the robotic telescope of (IAU station 565) Bassano Bresciano\nObservatory, Italy. Member of:\nAAVSO - American Association of Variable Star Observers.\nUAI/SSV - Unione Astrofili Italiani/sezione stelle variabili-GRB.\nGAC - Gruppo Astrofili Cremonesi.\n\nThe observations started 24.57 hour after the FERMI trigger, At the end of twilight\nwith our Newton telescope D%0 mm F/D=4.8\n\nWeather conditions were good.\n\nWe co-added 2 series of 70 exposures of 60 sec each.\n\nStart T0+ End T0+\n24.57 hour 27.09 hour\n\nWe detected a (fading) afterglow in the error box of the XRTcandidate.\nat the following position (+/- 2 arcsec):\n\nRA (J2000.0) = 16h 36m 31.51s\nDEC(J2000.0) = +47d 51p 32.2s\n\nThe results of our photometry are:\n\n-----------------------------------\n JD Mag Err Flt\n-----------------------------------\n2460170.36459 19.9 +/- 0.2 CR\n2460170.38708 20.1 +/- 0.2 CR\n\nCR is unfiltered with R zero point.\n\nMagnitudes were estimated with the PanSTARRS cat. and\nare not corrected for galactic dust extinction.\n\nReference:\nhttp://www.osservatoriobassano.org/GRB.asp\n\nThe message may be cited.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMDIzMjEzLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.Jv-sRDGlfBngATwfW2djG7RZLt8Qyryh3fZldxjhTtw\n\n",
"published": "2023-08-14T14:26:59.406428Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-14T14:26:59.406446Z",
"modified": "2023-08-14T14:26:59.412409Z",
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},
{
"id": 2073,
"topic": "gcn.circular",
"uuid": "ac2340d0-fffa-4cb0-a5f2-16190a6d5176",
"title": "GRB 230812B : optical observations from Observatoire de Haute-Provence",
"submitter": "Hop gcn.circular",
"authors": "Emeric Le Floc'h at CEA-Saclay <emeric.lefloch@cea.fr>",
"data": {
"date": "23/08/14 15:16:09 GMT",
"from": "Emeric Le Floc'h at CEA-Saclay <emeric.lefloch@cea.fr>",
"title": "GCN CIRCULAR",
"number": "34418",
"subject": "GRB 230812B : optical observations from Observatoire de Haute-Provence"
},
"message_text": "C. Adami (LAM), T. Adami (ENS Paris-Saclay), B. Schneider (MIT), A. Saccardi (GEPI, Obs. de Paris), A. de Ugarte Postigo (OCA, CNRS), E. Le Flocâh, F. Schüssler, D. Turpin (CEA-Saclay), S. D. Vergani, J. P. Palmerio (GEPI, Obs. de Paris), S. Basa (LAM), D. Götz (CEA-Saclay), S. Antier (OCA) report, on behalf of a larger collaboration:\n\nWe observed the field of GRB 230812B (Fermi GBM Team GCN, 34386; Roberts et al., GCN 34391; Scotton et al., GCN 34392; Page et al., GCN 34394; Zheng & Filippenko, GCN 34395; Kuin et al., GCN 34399; Beardmore et al., GCN 34400; Casentini et al., GCN 34402; de Ugarte Postigo et al., GCN 24409, 34410) using the T120 telescope of Observatoire de Haute Provence (OHP) in imaging mode. We obtained 10x360s exposures in the V-band with a mid-epoch of 2023-08-13 22:00 UT (~1 day after trigger), 2x300s exposures in the R-band with a mid-epoch of 2023-08-14 00:00 UT, and 10x360s exposures in the I band with a mid-epoch of 2023-08-13 20:40 UT.\nWe derive the following photometry, calibrated against the Pan-STARRS catalog and not corrected for Galactic dust reddening:\n\nV = 20.87 +/- 0.08 mag\nR = 20.64 +/- 0.09 mag\nI = 19.77 +/- 0.04 mag\n\nWe also observed the field of GRB 230812B using the T193cm equipped with the MISTRAL spectro-imager. We obtained 4x300s + 1x60s exposures in the râ band at a mid-epoch of 2023-08-13 20:15 UT, leading to the following preliminary photometry estimate:\n\nrâ = 20.32 +/- 0.06 mag\n\nWe finally obtained 1h of exposure (2x15min + 1x30min) in spectroscopic mode, using the blue setting of MISTRAL. We clearly detect the continuum associated with the transient emission, leading to a redshift upper limit (z<2.5) consistent with the redshift determination obtained by the GTC and the NOT (de Ugarte Postigo et al., GCN 24409, 34410). The signal to noise in the final combined spectrum is however not sufficient to securely identify any absorption line.\n\nWe acknowledge Claire Moutou as well as the excellent support from Jean Balcaen and Yoann Degot-Longhi (Observatoire de Haute Provence).\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMDI2MTc0LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.HOo3ULvzhrKoQ5BBrXBf0XJBIvv0yalWKKaJD_PO77c\n\n",
"published": "2023-08-14T15:16:23.971109Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-14T15:16:23.971126Z",
"modified": "2023-08-14T15:16:23.977156Z",
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{
"id": 2074,
"topic": "gcn.circular",
"uuid": "05f78bed-1ff3-4066-a6db-9ebedc28da59",
"title": "GRB 230812B: Leavitt Observatory optical observations",
"submitter": "Hop gcn.circular",
"authors": "leavittob@gmail.com",
"data": {
"date": "23/08/14 16:37:57 GMT",
"from": "leavittob@gmail.com",
"title": "GCN CIRCULAR",
"number": "34419",
"subject": "GRB 230812B: Leavitt Observatory optical observations"
},
"message_text": "L. Moretti and E. Pavoni (Leavitt Observatory), in a large collaboration with:\nM.G. Dainotti (National Astronomical Observatory of Japan), \nY. Niino (Tokyo University, Institute of Astronomy), \nK. Kalinowski (Aarhus University, Department of Physics and Astronomy),\nB. De Simone (Università degli Studi Di Salerno)\nreport: \n\nWe observed the field of GRB 230812B (Fermi GBM Team GCN, 34386; Roberts et al., GCN 34391; Scotton et al., GCN 34392; Page et al., GCN 34394; Zheng & Filippenko, GCN 34395; Kuin et al., GCN 34399; Beardmore et al., GCN 34400; Casentini et al., GCN 34402; de Ugarte Postigo et al., GCN 34409, 34410) with the telescope of Leavitt Observatory, Italy. Member of: \n\nUAI/SSV - Unione Astrofili Italiani/sezione stelle variabili, GRB section.\nATA - Associazione Tuscolana di Astronomia.\n\nThe observations began at 20:35 UT on 2023/08/13 (~1 day after the FERMI trigger), at the end of twilight, with our RC telescope D=250 mm F/D=8.\n\nWeather conditions were good.\n\nWe took 9 images of 240 sec each. All images are unfiltered, calibrated with master dark and master flat, stacked with ASTAP software.\n\nWe detected the afterglow at the following position:\nRA(J2000) = 16h 36m 31.48s\nDec(J2000) = +47° 51' 32.1\"\n\nWe measured its brightness of 20.78 +/- 0.2 mag in our coadd image in clear band, at a mid-time of 25.913 hours after the FERMI trigger, JD 2460170.36944. \n\nMagnitudes were estimated with the Gaia (BP) DR3 cat. and are not corrected for galactic dust extinction.\n\nThe message may be cited.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMDMxMDgzLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.HYAiRT1Z5CbKTeK_OKF3Eiyhh6GJDhBDUDL3ng3w-6g\n\n",
"published": "2023-08-14T16:38:08.801730Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-14T16:38:08.801748Z",
"modified": "2023-08-14T16:38:08.809138Z",
"nonlocalizedevents": [],
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},
{
"id": 2572,
"topic": "gcn.circular",
"uuid": "bd98de09-4bf0-4138-98ae-f8dc82385f70",
"title": "GRB 230828A: GRBAlpha detection",
"submitter": "Hop gcn.circular",
"authors": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"data": {
"date": "23/08/29 11:14:43 GMT",
"from": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"title": "GCN CIRCULAR",
"number": "34590",
"subject": "GRB 230828A: 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 long-duration GRB 230828A (AstroSat trigger at 2023-08-28 16:29:43 UT, INTEGRAL/SPI-ACS detection at 2023-08-28 ~16:28:55 UT) was observed by the GRBAlpha 1U CubeSat (Pal et al. 2023; arXiv:2302.10048).\n\nThe detection was confirmed at the peak time 2023-08-28 16:29:53 UTC. The T90 duration measured by GRBAlpha is 140 s and the overall significance during T90 reaches 27 sigma.\n\nThe light curve obtained by GRBAlpha is available here: \nhttps://grbalpha.konkoly.hu/static/share/GRB230828A_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\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkzMzA3Njg5LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.Wm8ifRFiaRseNROw5d8_WIG-kPYCHsQ9RIRCRxdbTfs\n\n",
"published": "2023-08-29T11:14:57.589201Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-29T11:14:57.589219Z",
"modified": "2023-08-29T11:14:57.594548Z",
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{
"id": 4061,
"topic": "igwn.gwalert",
"uuid": "6fef2ca8-ea24-4dc3-98a7-dcb5125eb47c",
"title": "S231021h - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"time": "2023-10-21T00:43:26.178Z",
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"sequence_num": 2,
"time_created": "2023-10-21T00:49:42Z",
"superevent_id": "S231021h",
"external_coinc": null
},
"message_text": "",
"published": "2023-10-21T00:49:43.911128Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-10-21T00:49:43.911153Z",
"modified": "2023-10-21T00:49:43.916698Z",
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{
"id": 3408,
"topic": "gcn.circular",
"uuid": "547825f6-f715-4ce8-9c04-d45fe83fb872",
"title": "Swift Triggers 1192745 and 1192747 are not astrophysical events",
"submitter": "Hop gcn.circular",
"authors": "K.L. Page at U Leicester <klp5@leicester.ac.uk>",
"data": {
"date": "23/09/27 07:46:34 GMT",
"from": "K.L. Page at U Leicester <klp5@leicester.ac.uk>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34774"
},
"title": "GCN CIRCULAR",
"number": "34774",
"subject": "Swift Triggers 1192745 and 1192747 are not astrophysical events"
},
"message_text": "K. L. Page (U Leicester) reports on behalf of the Neil Gehrels Swift\nObservatory Team:\n\nTo conclude the summary of false triggers caused by the Swift star tracker\nloss-of-lock event on 2023-09-26, triggers 1192745 and 1192747 (at 22:53\nand 23:00 UT respectively) were also not astrophysical events.\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34774.",
"published": "2023-09-28T20:53:59.352157Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-09-28T20:53:59.352176Z",
"modified": "2023-09-28T20:53:59.357551Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 11739,
"topic": "lvk-users.beccatest",
"uuid": "377df233-f045-425c-8780-0c8ac633b680",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"L1"
],
"time": [
1400629000
],
"range": 156.85383400328632
},
"message_text": "",
"published": "2024-05-24T23:36:41.363648Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-24T23:36:41.363662Z",
"modified": "2024-05-24T23:36:41.363666Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 11740,
"topic": "lvk-users.beccatest",
"uuid": "9aa6279b-af3b-4674-8fdb-978fcae28ddc",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"V1"
],
"time": [
1400629000
],
"range": 53.20624505106601
},
"message_text": "",
"published": "2024-05-24T23:36:46.379581Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-24T23:36:46.379597Z",
"modified": "2024-05-24T23:36:46.379601Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 11741,
"topic": "lvk-users.beccatest",
"uuid": "78880683-0dda-4ca2-8063-ab67a0509f63",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"H1"
],
"time": [
1400629100
],
"range": 153.4024421364951
},
"message_text": "",
"published": "2024-05-24T23:38:18.660680Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-24T23:38:18.660700Z",
"modified": "2024-05-24T23:38:18.660708Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 11742,
"topic": "lvk-users.beccatest",
"uuid": "39238f7d-db0f-46c2-9a70-1caf4453c865",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"L1"
],
"time": [
1400629100
],
"range": 157.38227430741574
},
"message_text": "",
"published": "2024-05-24T23:38:21.674909Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-24T23:38:21.674922Z",
"modified": "2024-05-24T23:38:21.674927Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2082,
"topic": "gcn.circular",
"uuid": "42538506-902f-41e9-aee5-602bbaba0ad4",
"title": "LIGO/Virgo/KAGRA S230814r: Updated Sky localization",
"submitter": "Hop gcn.circular",
"authors": "charlie.hoy@port.ac.uk",
"data": {
"date": "23/08/14 22:26:38 GMT",
"from": "charlie.hoy@port.ac.uk",
"title": "GCN CIRCULAR",
"number": "34426",
"subject": "LIGO/Virgo/KAGRA S230814r: Updated Sky localization"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:\n\nWe have conducted further offline analysis of the LIGO Hanford Observatory (H1) and LIGO Livingston Observatory (L1) data around the time of the compact binary merger (CBC) candidate S230814r (GCN Circular 34411). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.multiorder.fits, distributed via GCN Notice, is available for retrieval from the GraceDB event page:\n\nhttps://gracedb.ligo.org/superevents/S230814r\n\nFor the Bilby.multiorder.fits sky map, the 90% credible region is 3389 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 3788 +/- 1416 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\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMDUyMDAzLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.ok1lNHQuSTMHdQTZ8WWpgjFz_F1FlbaydYGBnfwqKZE\n\n",
"published": "2023-08-14T22:26:49.558227Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-14T22:26:49.558248Z",
"modified": "2023-08-14T22:26:49.562213Z",
"nonlocalizedevents": [
{
"event_id": "S230814r"
}
],
"targets": []
},
{
"id": 2083,
"topic": "gcn.circular",
"uuid": "076e3a4b-3f15-412c-a780-e88d12bc26a5",
"title": "GRB 230812B: Upper limits from a neutrino search with IceCube",
"submitter": "Hop gcn.circular",
"authors": "Jessie Thwaites at IceCube/U Wisc-Madison <thwaites@wisc.edu>",
"data": {
"date": "23/08/14 22:45:46 GMT",
"from": "Jessie Thwaites at IceCube/U Wisc-Madison <thwaites@wisc.edu>",
"title": "GCN CIRCULAR",
"number": "34427",
"subject": "GRB 230812B: Upper limits from a neutrino search with IceCube"
},
"message_text": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nIceCube has performed a search for track-like muon neutrino events arriving from the direction of GRB 230812B (GCN Circular 34391 (Fermi-GBM), 34392 (Fermi-LAT)) at the position determined by Swift-XRT (GCN Circular 34394) in a time range of -1 hour/+2 hours from the initial trigger reported by Fermi-GBM (T0 23-08-12 18:58:12.05 UTC) during which IceCube was collecting good quality data.\n\nZero track-like events are found to coincide with the position of the GRB. We accordingly derive a time-integrated muon-neutrino flux upper limit for this source of E^2 dN/ dE = 5.1 x 10^-2 GeV cm^-2 at 90% CL, under the assumption of an E^-2 power law. 90% of events IceCube would detect from a source at this declination with an E^-2 spectrum have energies in the approximate energy range between 600 GeV and 300 TeV.\n\nA subsequent search was performed including 2 days of data centered on the Fermi-GBM trigger (2023-08-11 18:58:12.05 UTC to 2023-08-13 18:58:12.05 UTC). In this case, we report a p-value of 1.0, consistent with background expectation. We accordingly derive a time-integrated muon-neutrino flux upper limit for this source of E^2 dN/ dE = 5.4 x 10^-2 GeV cm^-2 at 90% CL, under the assumption of an E^-2 power law.\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] IceCube Collaboration, R. Abbasi et al., ApJ 910 4 (2021)\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMDUzMTUxLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.m-6H7GFeq9TV8eA1Fh85Uw1ZyTb9HwIVuMrVIyrRj7w\n\n",
"published": "2023-08-14T22:45:56.518703Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-14T22:45:56.518723Z",
"modified": "2023-08-14T22:45:56.522508Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2093,
"topic": "igwn.gwalert",
"uuid": "f6d4bf69-7dcd-4562-a153-5eecd9c59b23",
"title": "S230815n - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230815n/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230815n/view/"
},
"event": {
"far": 1.93799e-05,
"time": "2023-08-15T08:37:03.359Z",
"group": "Burst",
"search": "AllSky",
"area_50": 488.4689015128991,
"area_90": 1494.15251188718,
"duration": 0.013647,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "802c035a4a6d763f4b0c6e6017c88238",
"classification": {},
"skymap_version": 0,
"central_frequency": 149.008377
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-15T08:40:50Z",
"superevent_id": "S230815n",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-15T08:40:51.568952Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-15T08:40:51.568973Z",
"modified": "2023-08-15T08:40:51.573988Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2094,
"topic": "igwn.gwalert",
"uuid": "8642dbfa-98e8-4ce5-aea7-0dc947506dd1",
"title": "S230815n - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230815n/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230815n/view/"
},
"event": {
"far": 1.93799e-05,
"time": "2023-08-15T08:37:03.359Z",
"group": "Burst",
"search": "AllSky",
"area_50": 488.4689015128991,
"area_90": 1494.15251188718,
"duration": 0.013647,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "802c035a4a6d763f4b0c6e6017c88238",
"classification": {},
"skymap_version": 0,
"central_frequency": 149.008377
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-15T08:45:25Z",
"superevent_id": "S230815n",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-15T08:45:26.486895Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-15T08:45:26.486924Z",
"modified": "2023-08-15T08:45:26.490913Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2095,
"topic": "igwn.gwalert",
"uuid": "33a1c43e-c4af-4e10-ae32-f6afe378bf4a",
"title": "S230815p - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230815p/files/olib.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230815p/view/"
},
"event": {
"far": 2.643944327540919e-06,
"time": "2023-08-15T08:56:18.693Z",
"group": "Burst",
"search": "AllSky",
"area_50": 4689.972889440001,
"area_90": 23362.577908098046,
"duration": 0.011010804799061392,
"pipeline": "oLIB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "ad3d6dc7700e75aa72039cda7ea73352",
"classification": {},
"skymap_version": 0,
"central_frequency": 467.52895531562467
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-15T09:12:55Z",
"superevent_id": "S230815p",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-15T09:12:56.683222Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-15T09:12:56.683258Z",
"modified": "2023-08-15T09:12:56.687797Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4062,
"topic": "igwn.gwalert",
"uuid": "4094f8cb-a750-42c1-800f-4d356e5d3816",
"title": "S231021k - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S231021k/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S231021k/view/"
},
"event": {
"far": 9.46004e-06,
"time": "2023-10-21T01:15:50.699Z",
"group": "Burst",
"search": "AllSky",
"area_50": 1540.9431326077026,
"area_90": 5572.070510556939,
"duration": 0.149683,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "85a3d1b5442ce868cc1734247da6df6f",
"classification": {},
"skymap_version": 0,
"central_frequency": 22.183464
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-10-21T01:18:09Z",
"superevent_id": "S231021k",
"external_coinc": null
},
"message_text": "",
"published": "2023-10-21T01:18:10.385245Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-10-21T01:18:10.385280Z",
"modified": "2023-10-21T01:18:10.393179Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 11744,
"topic": "lvk-users.beccatest",
"uuid": "e2f35d90-07f4-4285-999b-81c1e93eff5d",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"H1"
],
"time": [
1400629200
],
"range": 153.99538687322325
},
"message_text": "",
"published": "2024-05-24T23:39:59.994957Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-24T23:39:59.994973Z",
"modified": "2024-05-24T23:39:59.994978Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 11745,
"topic": "lvk-users.beccatest",
"uuid": "e548aa73-200d-4740-8703-18cf0efe639c",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"L1"
],
"time": [
1400629200
],
"range": 157.7041032129661
},
"message_text": "",
"published": "2024-05-24T23:40:01.025619Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-24T23:40:01.025635Z",
"modified": "2024-05-24T23:40:01.025641Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 11746,
"topic": "lvk-users.beccatest",
"uuid": "91a19be8-7394-4287-b8de-4a98d9b65f21",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"V1"
],
"time": [
1400629200
],
"range": 53.59963844841457
},
"message_text": "",
"published": "2024-05-24T23:40:06.042212Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-24T23:40:06.042226Z",
"modified": "2024-05-24T23:40:06.042231Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2103,
"topic": "gcn.circular",
"uuid": "9bd00172-1acb-4c79-8755-dcef984f8569",
"title": "GRB 230812B: AMI-LA radio detection of afterglow candidate",
"submitter": "Hop gcn.circular",
"authors": "Lauren Rhodes at Oxford <lauren.rhodes@physics.ox.ac.uk>",
"data": {
"date": "23/08/15 10:57:05 GMT",
"from": "Lauren Rhodes at Oxford <lauren.rhodes@physics.ox.ac.uk>",
"title": "GCN CIRCULAR",
"number": "34433",
"subject": "GRB 230812B: AMI-LA radio detection of afterglow candidate"
},
"message_text": "Lauren Rhodes, Joe Bright, Rob Fender (Oxford), Dave Green, Dave Titterington (Cambridge) report:\n\nWe observed the field of the gamma-ray burst GRB 230812B (GCN 34286) with the Arcminute Microkelvin Imager Large-Array (AMI-LA) at 15.5 GHz beginning at UT 18:13:51.9 on 14-Aug-2023 for a total of 4 hours. The flux standard 3c286 was used to calibrate the bandpass response and flux scale of the AMI-LA and J1658+4737 was used as an interleaved complex gain calibrator.\nWe detect a unresolved source at a position consistent with the one reported in GCN 34394 with a (preliminary) peak flux density of 280uJy/beam. The rms noise in the field is 40uJy/beam. Further observations are planned.\n\nWe thank the staff at the Mullard Radio Astronomy Observatory for carrying out these observations and operating the AMI-LA.\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMDk3MDMwLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.P15Jm4McvKFWDrztAz4SrbKOUuEvBoM8zaAO4Ws4y04\n\n",
"published": "2023-08-15T10:57:15.709226Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-15T10:57:15.709264Z",
"modified": "2023-08-15T10:57:15.718340Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2104,
"topic": "gcn.circular",
"uuid": "f1989f9f-e9c4-4d1b-a4dc-6a876375616e",
"title": "GRB 230815A: Swift detection of a burst",
"submitter": "Hop gcn.circular",
"authors": "K.L. Page at U Leicester <klp5@leicester.ac.uk>",
"data": {
"date": "23/08/15 11:25:59 GMT",
"from": "K.L. Page at U Leicester <klp5@leicester.ac.uk>",
"title": "GCN CIRCULAR",
"number": "34434",
"subject": "GRB 230815A: Swift detection of a burst"
},
"message_text": "\nN. J. Klingler (GSFC/UMBC/CRESSTII), C. Gronwall (PSU),\nK. L. Page (U Leicester), D. M. Palmer (LANL) and\nT. M. Parsotan (GSFC/UMBC/CRESSTII) report on behalf of the Neil\nGehrels Swift Observatory Team:\n\nAt 10:49:55 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 230815A (trigger\u001185505). Swift slewed immediately to the burst.\nThe BAT on-board calculated location is\nRA, Dec 184.772, -58.065 which is\n RA(J2000) = 12h 19m 05s\n Dec(J2000) = -58d 03' 53\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including\nsystematic uncertainty). The BAT light curve showed a single-peaked\nstructure with a duration of about 2 sec. The peak count rate\nwas ~6000 counts/sec (15-350 keV), at ~0 sec after the trigger.\n\nThe XRT began observing the field at 10:52:04.0 UT, 128.1 seconds after\nthe BAT trigger. Using promptly downlinked data we find a bright,\nuncatalogued X-ray source located at RA, Dec 184.72347, -58.05386 which\nis equivalent to:\n RA(J2000) = 12h 18m 53.63s\n Dec(J2000) = -58d 03' 13.9\"\nwith an uncertainty of 3.5 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 (4.94 x\n10^21 cm^-2, Willingale et al. 2013), with an excess column of 7.8\n(+3.75/-3.24) x 10^21 cm^-2 (90% confidence).\n\nThe initial flux in the 2.5 s image was 2.07e-09 erg cm^-2 s^-1 (0.2-10\nkeV).\n\nUVOT took a finding chart exposure of 150 seconds with the White filter\nstarting 155 seconds after the BAT trigger. No credible afterglow candidate has\nbeen found in the initial data products. The 2.7'x2.7' sub-image covers 100% of\nthe XRT error circle. Because of the density of catalogued stars, further\nanalysis is required to report an upper limit for any afterglow in the\nsub-image. Data from the list of sources generated on-board are not available\nat this time. No correction has been made for the large, but uncertain,\nextinction expected.\n\nBurst Advocate for this burst is N. J. Klingler (noelklin AT umbc.edu).\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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMDk4NzY1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.ANtaHSYMcV-ateNjJY04InqXz89A9227fqU1JRS-I3A\n\n",
"published": "2023-08-15T11:26:10.886652Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-15T11:26:10.886685Z",
"modified": "2023-08-15T11:26:10.898163Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2105,
"topic": "gcn.circular",
"uuid": "6e6d26fa-ebcb-4190-aab0-f799509a2b73",
"title": "GRB 230812B: Tautenburg observations",
"submitter": "Hop gcn.circular",
"authors": "Sylvio Klose at TLS Tautenburg <klose@tls-tautenburg.de>",
"data": {
"date": "23/08/15 13:55:41 GMT",
"from": "Sylvio Klose at TLS Tautenburg <klose@tls-tautenburg.de>",
"title": "GCN CIRCULAR",
"number": "34435",
"subject": "GRB 230812B: Tautenburg observations"
},
"message_text": "\nS. Klose, S. Melnikov, B. Stecklum, A. Nicuesa Guelbenzu, and F. Ludwig (all TLS Tautenburg) report:\n\nWe observed the field of GRB 230812B (Lesage et al., GCN 34387; Roberts et al., GCN 34391; Scotton et al., GCN 34392; Xiong et al., GCN 34401; Casentini et al., GCN 34402; Frederiks et al., GCN 34403) with the Tautenburg 1.34m Schmidt telescope equipped with the TAUKAM 6k x 6k CCD camera. Observations consisted of 3 x 90 sec exposures using the Sloan g, r, and i-band filter.\n\nFor the optical transient (first reported by Zheng et al., GCN 34395, and Lipunov et al, GCN 34396) we measure the following preliminary AB magnitudes (2.19 days post burst):\n\ng = 21.85 +/- 0.25 (midtime: August 14, 2023, 23:23:33 UT),\n\nr = 21.28 +/- 0.13 (midtime: August 14, 2023, 23:30:37 UT),\n\ni = 21.29 +/- 0.14 (midtime: August 14, 2023, 23:37:44 UT),\n\ncalibrated against SDSS stars in the field.\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMTA3NzQ2LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.Pu4B4nuDqMIoIsbuOQf8Ld575KrvHrPqiigzIIOlwts\n\n",
"published": "2023-08-15T13:55:51.488293Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-15T13:55:51.488311Z",
"modified": "2023-08-15T13:55:51.492327Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2106,
"topic": "gcn.circular",
"uuid": "cd609855-08ee-4165-952d-1d9bd8ccda37",
"title": "GRB 230812B: Iota Scorpii Observatory, La Spezia, Italy",
"submitter": "Hop gcn.circular",
"authors": "GIULIO SCARFI at IOTA SCORPII OBSERVATORY <terziaria@gmail.com>",
"data": {
"date": "23/08/15 14:09:22 GMT",
"from": "GIULIO SCARFI at IOTA SCORPII OBSERVATORY <terziaria@gmail.com>",
"title": "GCN CIRCULAR",
"number": "34436",
"subject": "GRB 230812B: Iota Scorpii Observatory, La Spezia, Italy"
},
"message_text": "Giulio Scarfì (Iota Scorpii Observatory, La Spezia,Italy)\nmail terziaria@gmail.com\n\nIn a large collaboration with:\nM.G. Dainotti (National Astronomical Observatory of Japan),\nY. Niino (Tokyo University, Institute of Astronomy),\nK. Kalinowski (Aarhus University, Department of Physics and Astronomy),\nB. De Simone (Universita' degli Studi Di Salerno)\n\nMembers of:\n\nGAD - Gruppo Astronomia Digitale.\nAAVSO - American Association of Variable Star Observers.\nUAI/SSV - Unione Astrofili Italiani/sezione stelle variabili-GRB.\n\nreport:\n\nI have observed the field of GRB 230812B (Lesage et al., GCN 34387;\nScotton et al., GCN 34392; Page, GCN 34394; Zheng & Filippenko, GCN\n34395; Lipunov et al., GCN 34396; Salgundi et al., GCN 34397; Ackley\net al., GCN 34398; Xiong et al., GCN 34401; Casentini et al., GCN\n34002; Frederiks et al., GCN 34403; Mao et al., GCN 34404; Odeh et\nal., GCN 34405; Moskvitin & Spiridonova GCN 34406; Leonini et al. GCN\n34408; de Ugarte Postigo et al. GCN 34409; de Ugarte Postigo et al.\nGCN 34410; Belkin et al. GCN 34412; Ruocco et al. GCN 34413; Frederiks\net al. GCN 34414; Ruocco et al. GCN 34415; Shrestha et al. GCN 34416;\nQuadri et al. GCN 34417; Adami et al. GCN 34418; Moretti et al. GCN\n34419; Kumar et al. GCN 34420; Belkin et al. GCN 34421 & GCN 34423;\nPyshna et al., GCN 34425) with my 0.40-m Ritchey-Cretien telescope.\n\nThe observations started 1660 min after the GRB trigger, at the end of\ntwilight,\nwith a Ritchey Cretien D=406 mm with reducer F/D=6,15.\nWeather conditions were good.\n\n\nAdd 12 x 300 sec. unfiltered images on August 13 2023,\nfrom 20:26:35 to 21:21:42 UT\n\n\nStart T0+     End T0+      R lim\n1660 min       1735 min        20\n\n\nI confirm a fading afterglow\n\n\nThe results of photometry are:\n\n\n     JD        mag     Err  Flt\n\n2460170.36555307  19.85 +/- 0.2  CLEAR\n\n\nMagnitudes were estimated with the Atlas catalog and\nare not corrected for galactic dust extinction.\n\n\n\nReference:\nhttp://www.iotascorpiiobservatory.it\n\n\n\nThe message may be cited.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMTA4NTY3LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.R3WXyANGEKOSoTO7XEoqZ1yCw8yIBEcWu_eFIG1ITHc\n\n",
"published": "2023-08-15T14:09:33.651718Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-15T14:09:33.651735Z",
"modified": "2023-08-15T14:09:33.655941Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2107,
"topic": "gcn.circular",
"uuid": "6e8768e9-af5a-4168-a40a-7ed11ce9740c",
"title": "GRB 230815A: Enhanced Swift-XRT position",
"submitter": "Hop gcn.circular",
"authors": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"data": {
"date": "23/08/15 16:44:53 GMT",
"from": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"title": "GCN CIRCULAR",
"number": "34437",
"subject": "GRB 230815A: Enhanced Swift-XRT position"
},
"message_text": "A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester)\nreport on behalf of the Swift-XRT team.\n\nUsing 927 s of XRT Photon Counting mode data and 1 UVOT\nimages for GRB 230815A, 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 = 184.72225, -58.05290 which is equivalent\nto:\n\nRA (J2000): 12h 18m 53.34s\nDec (J2000): -58d 03' 10.4\"\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\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMTE3ODk5LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.qkzmvftMtJGL1qvp0elIVJ7rOcJftfj3ZWCvakobMgs\n\n",
"published": "2023-08-15T16:45:08.485052Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-15T16:45:08.485072Z",
"modified": "2023-08-15T16:45:08.490345Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4063,
"topic": "igwn.gwalert",
"uuid": "5ee122ce-4c24-4190-83b8-222f6e8c9edd",
"title": "S231021k - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S231021k/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S231021k/view/"
},
"event": {
"far": 9.46004e-06,
"time": "2023-10-21T01:15:50.699Z",
"group": "Burst",
"search": "AllSky",
"area_50": 1540.9431326077026,
"area_90": 5572.070510556939,
"duration": 0.149683,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "85a3d1b5442ce868cc1734247da6df6f",
"classification": {},
"skymap_version": 0,
"central_frequency": 22.183464
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-10-21T01:22:43Z",
"superevent_id": "S231021k",
"external_coinc": null
},
"message_text": "",
"published": "2023-10-21T01:22:59.067656Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-10-21T01:22:59.067693Z",
"modified": "2023-10-21T01:22:59.075191Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6707,
"topic": "gcn.classic.text.ICECUBE_ASTROTRACK_BRONZE",
"uuid": "cab0b248-54a8-4114-be0a-8cd95ae3c0f2",
"title": "GCN/AMON NOTICE",
"submitter": "GCN Classic Over Kafka",
"authors": "",
"data": {
"far": "3.4261 [yr^-1]",
"urls": {
"gcn": "https://gcn.gsfc.nasa.gov/notices_amon_g_b/139303_27647445.amon"
},
"title": "GCN/AMON NOTICE",
"energy": "1.2084e+02 [TeV]",
"src_ra": "74.1535d {+04h 56m 37s} (J2000), 74.4674d {+04h 57m 52s} (current), 73.5081d {+04h 54m 02s} (1950)",
"stream": "25",
"run_num": "139303",
"src_dec": "+1.0796d {+01d 04' 47\"} (J2000), +1.1162d {+01d 06' 58\"} (current), +1.0021d {+01d 00' 07\"} (1950)",
"comments": "IceCube Bronze event.\nThe position error is statistical only, there is no systematic added.",
"revision": "0",
"sun_dist": "47.00 [deg] Sun_angle= -3.1 [hr] (East of Sun)",
"event_num": "27647445",
"moon_dist": "93.81 [deg]",
"src_error": "55.67 [arcmin radius, stat-only, 90% containment]",
"sun_postn": "28.28d {+01h 53m 08s} +11.61d {+11d 36' 23\"}",
"ecl_coords": "72.95,-21.43 [deg] ecliptic lon,lat of the event",
"gal_coords": "197.89,-24.76 [deg] galactic lon,lat of the event",
"moon_postn": "168.47d {+11h 13m 53s} +7.82d {+07d 49' 17\"}",
"signalness": "3.1477e-01 [dn]",
"notice_date": "Fri 19 Apr 24 23:26:26 UT",
"notice_type": "ICECUBE Astrotrack Bronze",
"src_error50": "21.68 [arcmin radius, stat-only, 50% containment]",
"discovery_date": "20419 TJD; 110 DOY; 24/04/19 (yy/mm/dd)",
"discovery_time": "84341 SOD {23:25:41.04} UT"
},
"message_text": "TITLE: GCN/AMON NOTICE\nNOTICE_DATE: Fri 19 Apr 24 23:26:26 UT\nNOTICE_TYPE: ICECUBE Astrotrack Bronze \nSTREAM: 25\nRUN_NUM: 139303\nEVENT_NUM: 27647445\nSRC_RA: 74.1535d {+04h 56m 37s} (J2000),\n 74.4674d {+04h 57m 52s} (current),\n 73.5081d {+04h 54m 02s} (1950)\nSRC_DEC: +1.0796d {+01d 04' 47\"} (J2000),\n +1.1162d {+01d 06' 58\"} (current),\n +1.0021d {+01d 00' 07\"} (1950)\nSRC_ERROR: 55.67 [arcmin radius, stat-only, 90% containment]\nSRC_ERROR50: 21.68 [arcmin radius, stat-only, 50% containment]\nDISCOVERY_DATE: 20419 TJD; 110 DOY; 24/04/19 (yy/mm/dd)\nDISCOVERY_TIME: 84341 SOD {23:25:41.04} UT\nREVISION: 0\nENERGY: 1.2084e+02 [TeV]\nSIGNALNESS: 3.1477e-01 [dn]\nFAR: 3.4261 [yr^-1]\nSUN_POSTN: 28.28d {+01h 53m 08s} +11.61d {+11d 36' 23\"}\nSUN_DIST: 47.00 [deg] Sun_angle= -3.1 [hr] (East of Sun)\nMOON_POSTN: 168.47d {+11h 13m 53s} +7.82d {+07d 49' 17\"}\nMOON_DIST: 93.81 [deg]\nGAL_COORDS: 197.89,-24.76 [deg] galactic lon,lat of the event\nECL_COORDS: 72.95,-21.43 [deg] ecliptic lon,lat of the event\nCOMMENTS: IceCube Bronze event. \nCOMMENTS: The position error is statistical only, there is no systematic added. \n",
"published": "2024-04-19T23:26:26Z",
"message_parser": "Icecube Notice Plaintext Parser v1",
"retracted": false,
"created": "2024-04-19T23:26:26.563074Z",
"modified": "2024-04-19T23:26:26.570505Z",
"nonlocalizedevents": [
{
"event_id": "139303_27647445"
}
],
"targets": [
{
"id": 33,
"name": "icecube_139303_27647445_src",
"right_ascension": 74.1535,
"right_ascension_sexagesimal": "4:56:36.84",
"declination": 1.0796,
"declination_sexagesimal": "1:04:46.56"
}
]
},
{
"id": 2126,
"topic": "gcn.circular",
"uuid": "3bd2308c-6493-47a1-bdf5-8560f1cc2cd3",
"title": "GRB 230812B: GAD Observatory optical observations (upper limit)",
"submitter": "Hop gcn.circular",
"authors": "Claudio Lopresti <cl3lop@gmail.com>",
"data": {
"date": "23/08/16 10:38:15 GMT",
"from": "Claudio Lopresti <cl3lop@gmail.com>",
"title": "GCN CIRCULAR",
"number": "34445",
"subject": "GRB 230812B: GAD Observatory optical observations (upper limit)"
},
"message_text": "Claudio Lopresti (Gruppo Astronomia Digitale - GAD Observatory, La Spezia, Italy),\nin a large collaboration with:\nM.G. Dainotti (National Astronomical Observatory of Japan),\nY. Niino (Tokyo University, Institute of Astronomy),\nK. Kalinowski (Aarhus University, Department of Physics and Astronomy),\nB. De Simone (Universita' degli Studi Di Salerno)\nreport:\n\nI imaged the field of GRB 230812B (Lesage et al., GCN 34387;\nScotton et al., GCN 34392; Page, GCN 34394; Zheng & Filippenko, GCN 34395;\nLipunov et al., GCN 34396; Salgundi et al., GCN 34397; Ackley et al., GCN 34398;\nXiong et al., GCN 34401; Casentini et al., GCN 34002; Frederiks et al., GCN 34403;\nMao et al., GCN 34404; Odeh et al., GCN 34405; Moskvitin et al., GCN 34406)\ndetected by FERMI(trigger 713559497.049606 / 230812790)\nwith the GAD Observatory, La Spezia, Italy Italy.\n\nMember of:\nUAI/SSV - Unione Astrofili Italiani/sezione stelle variabili, GRB section\nGAD - Gruppo Astronomia Digitale\n\nThe observations started 48.02 hour after the FERMI trigger, At the end of twilight\nwith a Maksutov-Newton telescope D\u00180 mm F/D=4\n\nWeather conditions were good.\n\nWe co-added series of 8 exposures of 60 sec each.\n\nStart T0+ End T0+ R lim\n3168 min 3178 min 19.6\n\nI did not detect any optical afterglow in the Swift/XRT (Page, GCN\nCirc. 34387) position. The magnitude limit is about 19.5 mag, compared\nto the magnitudes of nearby stars from the Gaia EDR3 Catalog\n\nMagnitudes were estimated with the Gaia EDR3 cat. and\nare not corrected for galactic dust extinction.\n\nReference:\nhttps://www.parcodellestelle.com/\n\nThe message may be cited.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMTgyMzAxLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.SCQshQeHnS3RHRPPp9LvlTQl_NWLMXBqNYxGQ6rm01Q\n\n",
"published": "2023-08-16T10:38:28.416652Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-16T10:38:28.416669Z",
"modified": "2023-08-16T10:38:28.421297Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2127,
"topic": "igwn.gwalert",
"uuid": "1a66f911-cdbc-4744-877c-74250e146ab4",
"title": "S230816ac - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230816ac/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230816ac/view/"
},
"event": {
"far": 2.22191e-05,
"time": "2023-08-16T12:09:34.137Z",
"group": "Burst",
"search": "BBH",
"area_50": 351.664037343479,
"area_90": 1122.1356036473303,
"duration": 0.006814,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "aa8d0a6387ca8b2fdbe9d0880887fb41",
"classification": {},
"skymap_version": 0,
"central_frequency": 111.547371
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-16T12:11:02Z",
"superevent_id": "S230816ac",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-16T12:11:02.643746Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-16T12:11:02.643766Z",
"modified": "2023-08-16T12:11:02.647588Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2128,
"topic": "igwn.gwalert",
"uuid": "55682fbc-b801-4393-8f1d-85aed8ddc934",
"title": "S230816ac - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230816ac/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230816ac/view/"
},
"event": {
"far": 2.22191e-05,
"time": "2023-08-16T12:09:34.137Z",
"group": "Burst",
"search": "BBH",
"area_50": 351.664037343479,
"area_90": 1122.1356036473303,
"duration": 0.006814,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "aa8d0a6387ca8b2fdbe9d0880887fb41",
"classification": {},
"skymap_version": 0,
"central_frequency": 111.547371
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-16T12:15:35Z",
"superevent_id": "S230816ac",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-16T12:15:36.398118Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-16T12:15:36.398193Z",
"modified": "2023-08-16T12:15:36.401812Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2129,
"topic": "gcn.circular",
"uuid": "71b68bc6-13d7-4f50-a040-6010e7ffeda0",
"title": "GRB230815A: Swift/UVOT upper limits",
"submitter": "Hop gcn.circular",
"authors": "Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>",
"data": {
"date": "23/08/16 12:42:08 GMT",
"from": "Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>",
"title": "GCN CIRCULAR",
"number": "34446",
"subject": "GRB230815A: Swift/UVOT upper limits"
},
"message_text": "A. A. Breeveld (UCL-MSSL) and N. J. Klingler (GSFC/UMBC/CRESSTII) report on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 230815A 155 s after the BAT trigger (Klingler et al., GCN Circ. 34434).\nNo optical afterglow consistent with the XRT position (Beardmore et al., GCN Circ. 34437) 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 summed exposures are:\n\nFilter T_start(s) T_stop(s) Exp(s) Mag\n\nwhite_FC 155 305 147 >20.1\nwhite 513 1531 242 >20.3\nv 390 1582 136 >18.5\nb 489 1506 114 >19.3\nu 464 6300 293 >19.4\nuvw1 439 1632 136 >18.6\nuvm2 761 1606 97 >18.3\nuvw2 365 1557 136 >18.8\n\nThe magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.73 in the direction of the burst (Schlegel et al. 1998).\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMTg5NzMzLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.wbAGqUBbgQg1iExM3e58M3bx0cY91Vsvz--4Awl8lMw\n\n",
"published": "2023-08-16T12:42:19.835160Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-16T12:42:19.835178Z",
"modified": "2023-08-16T12:42:19.838934Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2575,
"topic": "gcn.circular",
"uuid": "d8a6f0e8-8bb2-4854-9940-040a9b4d8b3f",
"title": "GRB 230827B: CALET Gamma-Ray Burst Monitor detection",
"submitter": "Hop gcn.circular",
"authors": "Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>",
"data": {
"date": "23/08/29 15:56:27 GMT",
"from": "Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>",
"title": "GCN CIRCULAR",
"number": "34593",
"subject": "GRB 230827B: CALET Gamma-Ray Burst Monitor detection"
},
"message_text": "T. Tamura (Kanagawa U), A. Yoshida, T. Sakamoto, S. Sugita (AGU),\nY. Kawakubo (LSU), K. Yamaoka (Nagoya U), S. Nakahira (JAXA),\nY. Asaoka (ICRR), S. Torii, Y. Akaike, K. Kobayashi (Waseda U),\nY. Shimizu (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 230827B (Fermi GBM Observation: Hamburg et al.,\nGCN Circ. 34584; VZLUSAT-2 detection: Dafcikova et al., GCN\nCirc. 34585) triggered the CALET Gamma-ray Burst Monitor (CGBM)\nat 06:08:28.36 UTC on 27 July 2023\n(http://cgbm.calet.jp/cgbm_trigger/flight/1377151581/).\nThe burst signal was seen by only the SGM detector.\n\nThe burst light curve shows a multi-peaked structure that starts\nat T+2.3 sec, peaks at T+2.7 sec, and ends at T+87.7 sec.\nThe T90 and T50 durations measured by the SGM data are 79.6 +/- 3.7 sec\nand 57.4 +/- 2.5 sec (40-1000 keV), respectively.\n\nThe ground-processed light curve is available at\n\n http://cgbm.calet.jp/cgbm_trigger/ground/1377151581/\n\nThe CALET data used in this analysis are provided by\nthe Waseda CALET Operation Center located at Waseda University.\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkzMzI0NTkzLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.zAmDBJiI0AFGCB6aiLDD2u0Hj1PLMVgD3HdcKvGlOTU\n\n",
"published": "2023-08-29T15:56:37.878357Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-29T15:56:37.878385Z",
"modified": "2023-08-29T15:56:37.882226Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9153,
"topic": "lvk-users.beccatest",
"uuid": "4734260a-227d-4a90-aa35-c34d84358904",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"L1"
],
"time": [
1400509100
],
"range": 166.7216259921448
},
"message_text": "",
"published": "2024-05-23T14:18:19.955179Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T14:18:19.955198Z",
"modified": "2024-05-23T14:18:19.955206Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9154,
"topic": "lvk-users.beccatest",
"uuid": "43626a9f-95a7-40af-92ca-ec9cd8744904",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"V1"
],
"time": [
1400509100
],
"range": 49.468162727879196
},
"message_text": "",
"published": "2024-05-23T14:18:26.986679Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T14:18:26.986981Z",
"modified": "2024-05-23T14:18:26.986999Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2130,
"topic": "gcn.circular",
"uuid": "c0ed5c67-0f0f-4045-bd09-b734ed9cd9ec",
"title": "GRB 230815B: AstroSat CZTI detection",
"submitter": "Hop gcn.circular",
"authors": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"data": {
"date": "23/08/16 14:06:03 GMT",
"from": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"title": "GCN CIRCULAR",
"number": "34447",
"subject": "GRB 230815B: AstroSat CZTI detection"
},
"message_text": "B. Pari (IITB), 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 230815B which was also detected by GECAM-B (TrigNum 211).\n\nThe source was clearly detected in the 20-200 keV energy range. The light curve peaks at 2023-08-15 16:08:28.5 UTC. The measured peak count rate associated with the burst is 271.4 (+40.4, -41.4) counts/s above the background in the combined data of all quadrants, with a total of 2148 (+375, -381) counts. The local mean background count rate was 335.7 (+2.4, -3.0) counts/s. Using cumulative rates, we measure a T90 of 33.2 (+8.9, -11.6) 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 2023-08-15 16:08:27.3 UTC. The measured peak count rate associated with the burst is 725.5 (+75.8, -66.6) counts/s above the background in the combined data of all quadrants, with a total of 9598 (+1234, -1292) counts. The local mean background count rate was 1481.2 (+5.7, -6.9) counts/s. We measure a T90 of 43.5 (+8.7, -12.6) 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\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMTk0NzY5LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.Nl8p1Udn4FKeYVY16Wl7jMj6jgYxEO94fmBtOxklaJ8\n\n",
"published": "2023-08-16T14:06:14.768717Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-16T14:06:14.768746Z",
"modified": "2023-08-16T14:06:14.775069Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2131,
"topic": "gcn.circular",
"uuid": "93918428-7d67-4257-b9bd-438ee81e2bff",
"title": "GRB 230815B: GECAM-B and GECAM-C detection of a burst",
"submitter": "Hop gcn.circular",
"authors": "Yunfei Du at IHEP <duyunfei@ihep.ac.cn>",
"data": {
"date": "23/08/16 14:16:52 GMT",
"from": "Yunfei Du at IHEP <duyunfei@ihep.ac.cn>",
"title": "GCN CIRCULAR",
"number": "34448",
"subject": "GRB 230815B: GECAM-B and GECAM-C detection of a burst"
},
"message_text": "Shaolin Xiong, Yanqiu Zhang, Yue Huang report on behalf of the GECAM team:\n\nGECAM-B and GECAM-C were triggered in-flight by a long burst, GRB 230815B,\nat 2023-08-15T16:07:29.150 UTC and 2023-08-15T16:07:29.350 UTC, respetively,\nwhich was also observed by INTEGRAL/SPI-ACS and Konus-Wind.\n\nAccording to the realtime alert data of GECAM-B and GECAM-C, this burst\nmainly consists of a bright short pulse followed by a broad pulse with\na total duration (T90) of about ~30 sec (15-1000 keV).\n\nUsing the automatic on-ground localization pipeline with the realtime alert data,\nGECAM-B localized this burst to the following position (J2000):\nRA: 325.9 deg\nDEC: 13.2 deg\nErr: 5.1 deg (1-sigma, statistical only)\nThe systematic error of this location is estimated to be several degrees.\n\nThe time-averaged spectrum of GECAM-B realtime data shows that it could be\nadequately fit by a Band function with a fluence about 1.6E-5 erg/cm^2 in 20-1000 keV.\n\nWe note that these results are based on realtime alert data and thus very preliminary.\nRefined analysis will be reported later.\n\nGravitational wave high-energy Electromagnetic Counterpart All-sky Monitor\n(GECAM) mission originally consists of two microsatellites (GECAM-A and GECAM-B)\nlaunched in Dec. 2020. As the third member of GECAM constellation,\nGECAM-C was launched onboard SATech-01 experimental satellite in July 2022.\nGECAM mission is funded by the Chinese Academy of Sciences (CAS).\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMTk1NDE4LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.uooeNNDYBWNHJ1JXyGAgk7_LKgeJ4FjOkpCDKnZAlhE\n\n",
"published": "2023-08-16T14:17:02.547273Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-16T14:17:02.547293Z",
"modified": "2023-08-16T14:17:02.551613Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2576,
"topic": "gcn.circular",
"uuid": "83a4ad3f-436d-4987-bf4b-f838d01c9ec3",
"title": "GRB 230827A: Fermi GBM Observation",
"submitter": "Hop gcn.circular",
"authors": "Lorenzo Scotton at UAH <lscottongcn@outlook.com>",
"data": {
"date": "23/08/29 18:29:51 GMT",
"from": "Lorenzo Scotton at UAH <lscottongcn@outlook.com>",
"title": "GCN CIRCULAR",
"number": "34594",
"subject": "GRB 230827A: Fermi GBM Observation"
},
"message_text": "L. Scotton (UAH), C. Fletcher (USRA) and C. Meegan (UAH) report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"At 18:17:52.93 UT on 27 August 2023, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 230827A (trigger 714853077/230827762).\nwhich was also detected by GRBAlpha (Dafcikova et al. 2023, GCN 34583)\nand Swift/BAT GUANO (DeLaunay et al. 2023, GCN 34587).\nThe Fermi GBM Final Real-time Localization was reported in GCN 34575.\n\nThe angle from the Fermi LAT boresight is 95 degrees.\n\nThe GBM light curve consists of multiple peaks with a duration (T90)\nof about 83 s (50-300 keV). The time-averaged spectrum\nfrom T0-1.2 to T0+85.9 s is best fit by\na power law function with an exponential high-energy cutoff.\nThe power law index is -0.96 +/- 0.03 and the cutoff energy,\nparameterized as Epeak, is 415 +/- 26 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(3.58 +/- 0.08)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+21 s in the 10-1000 keV band is 10.7 +/- 0.4 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\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkzMzMzNzk3LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.-7oD-M3iitq6GFkvbt3Gm79bljPTvRV6tpR8q1C4248\n\n",
"published": "2023-08-29T18:30:02.873582Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-29T18:30:02.873598Z",
"modified": "2023-08-29T18:30:02.879601Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2577,
"topic": "igwn.gwalert",
"uuid": "4ab1e4b5-f82c-4da4-be11-ec6c07be46e9",
"title": "S230814ah - UPDATE",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230814ah/files/bayestar.multiorder.fits,1",
"gracedb": "https://gracedb.ligo.org/superevents/S230814ah/view/"
},
"event": {
"far": 1.846774159306684e-21,
"time": "2023-08-14T23:09:01.810Z",
"group": "CBC",
"search": "AllSky",
"area_50": 8688.367815226,
"area_90": 25259.381546275283,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.0,
"HasRemnant": 0.0
},
"instruments": [
"L1"
],
"significant": true,
"skymap_hash": "ef712ce2c3854a122a70a4934961ff34",
"classification": {
"BBH": 0.9999999999999799,
"BNS": 0.0,
"NSBH": 0.0,
"Terrestrial": 2.0095036745715333e-14
},
"skymap_version": 1,
"central_frequency": null
},
"alert_type": "UPDATE",
"sequence_num": 4,
"time_created": "2023-08-29T21:42:36Z",
"superevent_id": "S230814ah",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-29T21:42:37.022721Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-29T21:42:37.022745Z",
"modified": "2023-08-29T21:42:37.029058Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4064,
"topic": "igwn.gwalert",
"uuid": "8e174840-fdbe-48b6-a9f1-8f2adce10239",
"title": "S231021n - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S231021n/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S231021n/view/"
},
"event": {
"far": 3.272708364206346e-06,
"time": "2023-10-21T01:25:54.376Z",
"group": "CBC",
"search": "AllSky",
"area_50": 579.1126151957052,
"area_90": 2363.4509049146463,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.5213539472443225,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "39a1cd2bfd6d2af3f66d09539226ed7c",
"classification": {
"BBH": 0.0,
"BNS": 0.011647987859929336,
"NSBH": 0.0,
"Terrestrial": 0.9883520121400706
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-10-21T01:26:25Z",
"superevent_id": "S231021n",
"external_coinc": null
},
"message_text": "",
"published": "2023-10-21T01:26:26.908669Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-10-21T01:26:26.908705Z",
"modified": "2023-10-21T01:26:26.915021Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2142,
"topic": "gcn.circular",
"uuid": "ba01bdf5-0027-4e68-a2a9-6ed38e53828a",
"title": "GRB 230816A: Nanshan/HMT optical afterglow detection",
"submitter": "Hop gcn.circular",
"authors": "Dong Xu at NAOC/CAS <dxu@nao.cas.cn>",
"data": {
"date": "23/08/16 18:15:50 GMT",
"from": "Dong Xu at NAOC/CAS <dxu@nao.cas.cn>",
"title": "GCN CIRCULAR",
"number": "34453",
"subject": "GRB 230816A: Nanshan/HMT optical afterglow detection"
},
"message_text": "S.Q. Jiang, S.Y. Fu, X. Liu, T.H. Lu, Z.P. Zhu, D. Xu (NAOC), X. Gao (Urumqi No.1 Senior High School), J.Z. Liu (XAO) report:\n\nWe observed the field of GRB 230816A detected by Swift (Siegel et al., GCN 34450) using the HMT-0.5m telescope located at Nanshan, Xinjiang, China. Observations started at 16:10:20 UT on 2023-08-16, i.e., 92 s after the Swift/BAT trigger, we obtained a serise of 3x20, 3x40, 4x60, 12x90 s frames without any filter.\n\nAn uncatalogued optical source is detected in our stacked image at coordinates\n\nR.A. (J2000) = 21:53:46.9\nDec. (J2000) = +37:51:15.9\n\n2.23 arcsec away from the center of the XRT error circle (radius: 1.9 arcsec, 90% containment; Siegel et al., GCN 34450) with m(r) = 19.6 +/- 0.18 mag(AB) at 24.6 min post-burst, calibrated with the nearby PanSTAR field in the Sloan r-filter and the magnitude is not corrected for Galactic extinction. We thus think this OT is the optical afterglow of the burst.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMjA5NzU2LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.zJ6HFO4HeuQcc63AQdLOZfkBh35hP0jPE_I2YQVWAwE\n\n",
"published": "2023-08-16T18:16:00.569594Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-16T18:16:00.569613Z",
"modified": "2023-08-16T18:16:00.574604Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2143,
"topic": "gcn.circular",
"uuid": "955c4969-b968-4409-a950-dc0a8a4fd3af",
"title": "IPN triangulation of GRB 230815B",
"submitter": "Hop gcn.circular",
"authors": "Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru>",
"data": {
"date": "23/08/16 18:47:08 GMT",
"from": "Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru>",
"title": "GCN CIRCULAR",
"number": "34454",
"subject": "IPN triangulation of GRB 230815B"
},
"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\nA. Ridnaia, D. Frederiks, D. Svinkin, A. Lysenko,\nand T. Cline on behalf of the Konus-Wind 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 long-duration GRB 230815B\n(AstroSat CZTI detection: Pari et al., GCN 34447;\nGECAM-B and GECAM-C detection: Xiong et al., GCN 34448)\nhas been detected by Konus-Wind, INTEGRAL (SPI-ACS),\nSwift (BAT), AstroSat (CZTI), GECAM-B, GECAM-C,\nand Mars-Odyssey (HEND), so far, at about 58049 s UT (16:07:29).\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 307.334 (20h 29m 20s) +4.190 ( +4d 11' 24\")\n Corners:\n 307.122 (20h 28m 29s) +2.976 ( +2d 58' 33\")\n 307.518 (20h 30m 04s) +5.411 ( +5d 24' 38\")\n 307.571 (20h 30m 17s) +5.398 ( +5d 23' 53\")\n 307.175 (20h 28m 42s) +2.963 ( +2d 57' 47\")\n ---------------------------------------------\nThe error box area is 487 sq. arcmin, and its maximum\ndimension is 2.5 deg (the minimum one is 3 arcmin).\nThe Sun distance was 154 deg.\n\nThis localization may be improved.\n\nA triangulation map and HEALPix FITS file are posted at\nhttp://www.ioffe.ru/LEA/GRBs/GRB230815_T58054/IPN\n\nThe Konus-Wind time history and spectrum will be given\nin a forthcoming GCN Circular.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMjExNjM0LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.fHwFOPmGbhKuoFS8MKtjq1w_NpBzYiaD-Ebq-Tn-Xgs\n\n",
"published": "2023-08-16T18:47:19.123421Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-16T18:47:19.123438Z",
"modified": "2023-08-16T18:47:19.127289Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2144,
"topic": "gcn.circular",
"uuid": "761b8429-ab41-43ab-814b-c192a1811dc8",
"title": "Swift GRB230816.80: 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": "23/08/16 19:18:38 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "34455",
"subject": "Swift GRB230816.80: 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-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the Swift GRB230816.80 (trigger No 1185685,19h 59m 06.41s , +35d 20m 26.9s, R=0.05) errorbox 14 sec after notice time and 100 sec after trigger time at 2023-08-16 19:12:28 UT, with upper limit up to 17.5 mag. The observations began at zenith distance = 13 deg. The sun altitude is -22.4 deg.\n\nThe galactic latitude b = 3 deg., longitude l = 72 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"55110\n\nWe obtain a following upper limits.\n\nTmid-T0 | Site |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____|_______|______|________\n\n 110 | MASTER-Tavrida | C | 20 | 17.0 |\n 142 | MASTER-Tavrida | C | 30 | 17.5 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMjEzNTI0LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.UBKe5GnsdRiTBblw099PaLKfBXJ9G1krqAq8IppZy7A\n\n",
"published": "2023-08-16T19:18:53.113223Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-16T19:18:53.113242Z",
"modified": "2023-08-16T19:18:53.118721Z",
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},
{
"id": 2151,
"topic": "igwn.gwalert",
"uuid": "6e596fd1-5aa5-4ed2-a104-e2d2209191d8",
"title": "S230817a - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230817a/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230817a/view/"
},
"event": {
"far": 1.81391e-05,
"time": "2023-08-17T01:51:55.410Z",
"group": "Burst",
"search": "AllSky",
"area_50": 1163.2609922626775,
"area_90": 4448.256319619184,
"duration": 0.015834,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "18e68d0aba8ad27d70fa1ea5c254f3f7",
"classification": {},
"skymap_version": 0,
"central_frequency": 1055.947144
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-17T01:53:48Z",
"superevent_id": "S230817a",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-17T01:53:49.530657Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-17T01:53:49.530679Z",
"modified": "2023-08-17T01:53:49.536144Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2152,
"topic": "igwn.gwalert",
"uuid": "704cc700-e251-4b16-ba70-c0fb6a3f85d0",
"title": "S230817a - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230817a/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230817a/view/"
},
"event": {
"far": 1.81391e-05,
"time": "2023-08-17T01:51:55.410Z",
"group": "Burst",
"search": "AllSky",
"area_50": 1163.2609922626775,
"area_90": 4448.256319619184,
"duration": 0.015834,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "18e68d0aba8ad27d70fa1ea5c254f3f7",
"classification": {},
"skymap_version": 0,
"central_frequency": 1055.947144
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-17T01:58:22Z",
"superevent_id": "S230817a",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-17T01:58:23.253287Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-17T01:58:23.253310Z",
"modified": "2023-08-17T01:58:23.256952Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2153,
"topic": "gcn.circular",
"uuid": "0169afb3-22ab-4fba-9b39-67fd809d3e0c",
"title": "GRB 230816A: Enhanced Swift-XRT position",
"submitter": "Hop gcn.circular",
"authors": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"data": {
"date": "23/08/17 03:20:23 GMT",
"from": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"title": "GCN CIRCULAR",
"number": "34462",
"subject": "GRB 230816A: Enhanced Swift-XRT position"
},
"message_text": "P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester)\nreport on behalf of the Swift-XRT team.\n\nUsing 1206 s of XRT Photon Counting mode data and 1 UVOT\nimages for GRB 230816A, 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 = 328.44568, +37.85495 which is equivalent\nto:\n\nRA (J2000): 21h 53m 46.96s\nDec (J2000): +37d 51' 17.8\"\n\nwith an uncertainty of 2.3 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\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMjQyNDI4LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.tXVQI1ycsoOhVI1jEjo39WYnaLbhvw2ERFIVdkSo_EU\n\n",
"published": "2023-08-17T03:20:38.885544Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-17T03:20:38.885566Z",
"modified": "2023-08-17T03:20:38.891785Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9159,
"topic": "lvk-users.beccatest",
"uuid": "5cb34922-b776-4952-aa14-775c882e992b",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"L1"
],
"time": [
1400509300
],
"range": 167.59186801731107
},
"message_text": "",
"published": "2024-05-23T14:21:40.725885Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T14:21:40.725905Z",
"modified": "2024-05-23T14:21:40.725913Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9160,
"topic": "lvk-users.beccatest",
"uuid": "79e3636e-ce6a-43f5-80aa-887d329d3404",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"V1"
],
"time": [
1400509300
],
"range": 49.47803741749585
},
"message_text": "",
"published": "2024-05-23T14:21:47.748155Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T14:21:47.748176Z",
"modified": "2024-05-23T14:21:47.748184Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9161,
"topic": "lvk-users.beccatest",
"uuid": "ca97ab05-c81d-4fe4-9436-1d9c4ae5bf69",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"H1"
],
"time": [
1400509400
],
"range": 148.63606738989796
},
"message_text": "",
"published": "2024-05-23T14:23:18.910499Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T14:23:18.910520Z",
"modified": "2024-05-23T14:23:18.910527Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1,
"topic": "gcn.circular",
"uuid": "025112ec-3f89-43bb-b257-72a036144315",
"title": "LIGO/Virgo S230518h: 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": "23/05/18 18:28:23 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33817",
"subject": "LIGO/Virgo S230518h: 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 S230518h errorbox 192 sec after notice time and 10188 sec after trigger time at 2023-05-18 15:48:56 UT, with upper limit up to 17.7 mag. The observations began at zenith distance = 83 deg. The sun altitude is -20.3 deg.\n\nMASTER-SAAO robotic telescope located in South Africa (South African Astronomical Observatory) started inspect of the LIGO/Virgo S230518h errorbox 3191 sec after notice time and 13187 sec after trigger time at 2023-05-18 16:38:55 UT, with upper limit up to 17.7 mag. Observations started at twilight. The observations began at zenith distance = 43 deg. The sun altitude is -11.0 deg.\n\nThe galactic latitude b = -11 deg., longitude l = 223 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011865\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 10278 | 2023-05-18 15:48:56 | MASTER-Amur | (23h 42m 34.05s , +27d 56m 23.2s) | C | 180 | 16.4 |\n 10486 | 2023-05-18 15:52:23 | MASTER-Amur | (23h 36m 00.68s , +26d 00m 33.9s) | C | 180 | 16.5 |\n 10686 | 2023-05-18 15:55:44 | MASTER-Amur | (23h 56m 30.29s , +27d 55m 52.4s) | C | 180 | 15.6 |\n 11213 | 2023-05-18 16:04:31 | MASTER-Amur | (00h 13m 40.72s , +29d 50m 21.9s) | C | 180 | 15.3 |\n 11413 | 2023-05-18 16:07:51 | MASTER-Amur | (23h 55m 58.92s , +31d 42m 40.7s) | C | 180 | 17.0 |\n 11647 | 2023-05-18 16:11:44 | MASTER-Amur | (00h 05m 25.45s , +31d 43m 52.8s) | C | 180 | 16.6 |\n 12170 | 2023-05-18 16:20:28 | MASTER-Amur | (23h 56m 00.17s , +31d 44m 12.4s) | C | 180 | 16.8 |\n 12370 | 2023-05-18 16:23:48 | MASTER-Amur | (00h 05m 18.97s , +31d 43m 14.6s) | C | 180 | 16.9 |\n 12571 | 2023-05-18 16:27:08 | MASTER-Amur | (23h 25m 22.89s , +27d 54m 58.8s) | C | 180 | 17.5 |\n 12770 | 2023-05-18 16:30:28 | MASTER-Amur | (23h 34m 20.58s , +27d 54m 00.4s) | C | 180 | 17.3 |\n 12970 | 2023-05-18 16:33:47 | MASTER-Amur | (23h 18m 57.17s , +26d 01m 19.5s) | C | 180 | 17.5 |\n 13170 | 2023-05-18 16:37:07 | MASTER-Amur | (23h 27m 50.84s , +25d 59m 52.3s) | C | 180 | 17.4 |\n 13278 | 2023-05-18 16:38:55 | MASTER-SAAO | (06h 32m 29.44s , -23d 26m 27.9s) | C | 180 | 17.3 |\n 13278 | 2023-05-18 16:38:55 | MASTER-SAAO | (06h 33m 19.54s , -23d 26m 52.9s) | C | 180 | 17.4 |\n 13370 | 2023-05-18 16:40:27 | MASTER-Amur | (23h 25m 21.09s , +27d 55m 38.3s) | C | 180 | 17.5 |\n 13489 | 2023-05-18 16:42:27 | MASTER-SAAO | (06h 41m 06.20s , -23d 27m 07.7s) | C | 180 | 15.8 |\n 13489 | 2023-05-18 16:42:27 | MASTER-SAAO | (06h 41m 56.73s , -23d 27m 32.5s) | C | 180 | 15.7 |\n 13569 | 2023-05-18 16:43:47 | MASTER-Amur | (23h 34m 18.00s , +27d 54m 49.9s) | C | 180 | 17.5 |\n 13689 | 2023-05-18 16:45:47 | MASTER-SAAO | (06h 26m 56.44s , -21d 32m 00.9s) | C | 180 | 15.9 |\n 13689 | 2023-05-18 16:45:47 | MASTER-SAAO | (06h 27m 46.21s , -21d 32m 26.0s) | C | 180 | 15.9 |\n 13769 | 2023-05-18 16:47:06 | MASTER-Amur | (23h 18m 51.54s , +26d 01m 33.5s) | C | 180 | 17.7 |\n 13901 | 2023-05-18 16:49:18 | MASTER-SAAO | (06h 35m 40.83s , -21d 32m 55.8s) | C | 180 | 17.7 |\n 13901 | 2023-05-18 16:49:18 | MASTER-SAAO | (06h 36m 30.85s , -21d 33m 20.5s) | C | 180 | 17.7 |\n 13968 | 2023-05-18 16:50:26 | MASTER-Amur | (23h 27m 53.06s , +26d 00m 39.5s) | C | 180 | 17.6 |\n 14112 | 2023-05-18 16:52:49 | MASTER-SAAO | (06h 22m 09.91s , -19d 39m 15.3s) | C | 180 | 15.3 |\n 14112 | 2023-05-18 16:52:49 | MASTER-SAAO | (06h 22m 59.36s , -19d 39m 40.9s) | C | 180 | 15.4 |\n 14168 | 2023-05-18 16:53:46 | MASTER-Amur | (23h 26m 09.80s , +20d 17m 47.3s) | C | 180 | 17.5 |\n 14569 | 2023-05-18 17:00:26 | MASTER-Amur | (23h 27m 45.99s , +22d 13m 09.2s) | C | 180 | 17.4 |\n 14769 | 2023-05-18 17:03:46 | MASTER-Amur | (23h 36m 17.86s , +22d 12m 37.0s) | C | 180 | 17.4 |\n 14969 | 2023-05-18 17:07:06 | MASTER-Amur | (23h 26m 03.47s , +20d 19m 20.5s) | C | 180 | 17.4 |\n 15391 | 2023-05-18 17:14:09 | MASTER-Amur | (23h 27m 38.02s , +22d 11m 11.9s) | C | 180 | 17.5 |\n 15591 | 2023-05-18 17:17:28 | MASTER-Amur | (23h 36m 21.64s , +22d 11m 45.9s) | C | 180 | 17.4 |\n 15791 | 2023-05-18 17:20:48 | MASTER-Amur | (23h 30m 53.60s , +24d 05m 24.2s) | C | 180 | 17.6 |\n 15991 | 2023-05-18 17:24:08 | MASTER-Amur | (23h 39m 42.89s , +24d 07m 13.7s) | C | 180 | 17.6 |\n 16190 | 2023-05-18 17:27:28 | MASTER-Amur | (00h 13m 23.27s , +27d 55m 46.2s) | C | 180 | 17.0 |\n 16390 | 2023-05-18 17:30:47 | MASTER-Amur | (00h 22m 34.20s , +27d 54m 50.2s) | C | 180 | 16.8 |\n 16789 | 2023-05-18 17:37:26 | MASTER-Amur | (00h 04m 00.08s , +27d 48m 45.4s) | C | 180 | 16.8 |\n 16989 | 2023-05-18 17:40:46 | MASTER-Amur | (00h 03m 57.56s , +27d 50m 06.1s) | C | 180 | 16.8 |\n 17189 | 2023-05-18 17:44:06 | MASTER-Amur | (00h 03m 57.25s , +27d 48m 30.8s) | C | 180 | 16.7 |\n 17875 | 2023-05-18 17:55:33 | MASTER-Amur | (23h 30m 51.84s , +24d 05m 05.7s) | C | 180 | 16.9 |\n 18075 | 2023-05-18 17:58:52 | MASTER-Amur | (23h 39m 33.41s , +24d 04m 17.8s) | C | 180 | 16.6 |\n 18280 | 2023-05-18 18:02:18 | MASTER-Amur | (00h 13m 26.48s , +27d 53m 29.6s) | C | 180 | 15.9 |\n 18480 | 2023-05-18 18:05:37 | MASTER-Amur | (00h 22m 26.18s , +27d 54m 42.7s) | C | 180 | 15.8 |\n 18679 | 2023-05-18 18:08:57 | MASTER-Amur | (23h 55m 59.05s , +29d 47m 58.1s) | C | 180 | 16.0 |\n 18879 | 2023-05-18 18:12:17 | MASTER-Amur | (00h 05m 53.80s , +29d 47m 33.9s) | C | 180 | 15.8 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-05-18T18:28:33.247908Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-18T18:28:33.247934Z",
"modified": "2023-05-18T18:28:33.252792Z",
"nonlocalizedevents": [
{
"event_id": "S230518h"
}
],
"targets": []
}
]
}
