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"uuid": "6bf3d00b-f643-408b-86cf-af1826fe0328",
"title": "S230708z - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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{
"id": 1002,
"topic": "igwn.gwalert",
"uuid": "4f02417b-d804-439c-918a-45a0a6dba3da",
"title": "S230708z - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"published": "2023-07-08T07:24:01.809664Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-08T07:24:01.809692Z",
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{
"id": 1003,
"topic": "gcn.circular",
"uuid": "eb4853e7-66ee-4323-9e9a-8892a1ccc0b0",
"title": "IceCube Alert 230708.35: 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": "23/07/08 08:39:49 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "34167",
"subject": "IceCube Alert 230708.35: 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-OAGH robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Mexico (OAGH National Institute for Astrophysics, Optics and Electronics) was pointed to the IceCube Alert 230708.35 (trigger No 35302784,18h 05m 13.44s , +08d 45m 14.4s, R=0.51) errorbox 156 sec after notice time and 202 sec after trigger time at 2023-07-08 08:20:27 UT, with upper limit up to 17.6 mag. The observations began at zenith distance = 36 deg. The sun altitude is -34.8 deg.\n\nThe galactic latitude b = 14 deg., longitude l = 36 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"35528\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 222 | 2023-07-08 08:20:27 | MASTER-OAGH | (18h 04m 21.46s , +08d 30m 44.1s) | P- | 40 | 17.2 |\n 442 | 2023-07-08 08:23:46 | MASTER-OAGH | (18h 04m 20.37s , +08d 31m 20.1s) | P- | 80 | 17.6 |\n 708 | 2023-07-08 08:27:47 | MASTER-OAGH | (18h 04m 27.68s , +08d 29m 58.1s) | P- | 130 | 17.6 |\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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4ODA1NTk0LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.lzp9MTDcdWJ3i9Tm80EpC8CEJYbI8u8LLdca2E8Hy1k\n\n",
"published": "2023-07-08T08:39:59.681126Z",
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{
"id": 1004,
"topic": "gcn.circular",
"uuid": "8c92c833-e171-42f2-b74c-371dbddc045a",
"title": "GRB 230707A: Swift-XRT observations",
"submitter": "Hop gcn.circular",
"authors": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"data": {
"date": "23/07/08 09:04:40 GMT",
"from": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"title": "GCN CIRCULAR",
"number": "34168",
"subject": "GRB 230707A: Swift-XRT observations"
},
"message_text": "A. Tohuvavohu (U. Toronto), A.P. Beardmore (U. Leicester), J.P. Osborne\n(U. Leicester), M. Perri (SSDC & INAF-OAR), V. D'Elia (SSDC &\nINAF-OAR), B. Sbarufatti (INAF-OAB), D.N. Burrows (PSU), J. D. Gropp\n(PSU) and P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT\nteam:\n\nSwift-XRT has performed follow-up observations of the\nSwift/BAT-GUANO-detected burst GRB 230707A, collecting 4.7 ks of Photon\nCounting (PC) mode data between T0+32.7 ks and T0+51.0 ks.\n\nNo X-ray sources have been detected consistent with being within 197\narcsec of the Swift/BAT-GUANO position. The 3-sigma upper limit in the\nfield ranges from ~0.002 to ~0.003 ct s^-1, corresponding to a 0.3-10\nkeV observed flux of 9.4e-14 to 1.3e-13 erg cm^-2 s^-1 (assuming a\ntypical GRB spectrum).\n\nThree uncatalogued sources were detected too far from the GRB position\nto be likely afterglow candidates.\n\nThe results of the XRT-team automatic analysis of the XRT observations,\nincluding a position-specific upper limit calculator, are available at\nhttps://www.swift.ac.uk/ToO_GRBs/00021587.\n\nThis circular is an official product of the Swift-XRT team.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4ODA3MDg2LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.rSiTzgTJeZ08mDTFXkEVI71lBSa-kGQPGQOgKbcU9vA\n\n",
"published": "2023-07-08T09:04:51.145580Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-08T09:04:51.145600Z",
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{
"id": 1005,
"topic": "igwn.gwalert",
"uuid": "0309d796-d728-4b33-bb32-774912897b93",
"title": "S230708ah - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"published": "2023-07-08T10:40:10.189704Z",
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"created": "2023-07-08T10:40:10.189732Z",
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{
"id": 1006,
"topic": "igwn.gwalert",
"uuid": "483fd5c4-e1b9-44c4-9b79-67888cfb1767",
"title": "S230708ah - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"sequence_num": 2,
"time_created": "2023-07-08T10:44:43Z",
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"published": "2023-07-08T10:44:44.325087Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-08T10:44:44.325114Z",
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{
"id": 1007,
"topic": "gcn.circular",
"uuid": "d652b414-bdf5-48e8-a31d-f86994c760ad",
"title": "GRB 230707B: Swift/BAT-GUANO detection of a burst outside the coded FOV",
"submitter": "Hop gcn.circular",
"authors": "Jimmy DeLaunay at University of Alabama <delauj2@gmail.com>",
"data": {
"date": "23/07/08 12:27:24 GMT",
"from": "Jimmy DeLaunay at University of Alabama <delauj2@gmail.com>",
"title": "GCN CIRCULAR",
"number": "34169",
"subject": "GRB 230707B: Swift/BAT-GUANO detection of a burst outside the coded FOV"
},
"message_text": "James DeLaunay (U Alabama), Aaron Tohuvavohu (U Toronto), Samuele Ronchini (PSU), Gayathri Raman (PSU), Jamie A. Kennea (PSU), Tyler Parsotan (NASA GSFC) report:\n\nSwift/BAT did not localize GRB 230707B onboard (T0: 2023-07-07T18:46:20.29 UTC, Fermi trig 710120768, CALET trig 1372790743, INTEGRAL trig 10313)\n\nThe Fermi notice, distributed in near real-time, triggered the Swift Mission Operations Center operated Gamma-ray Urgent Archiver for Novel Opportunities (GUANO; Tohuvavohu et al. 2020, ApJ, 900, 1).\n\nUpon trigger by this notice, GUANO sent a command to the Swift Burst Alert Telescope (BAT) to save 200 seconds of BAT event-mode data from [-50,+150] seconds around the time of the burst. All the requested event mode data was delivered to the ground.\n\nThe BAT likelihood search, NITRATES (DeLaunay + Tohuvavohu 2022, ApJ, 941, 169), performed on the temporal window [T0-20 s, T0+20 s], detects the burst with a sqrt(TS) of 12.0 in a 16.384 s analysis time bin, starting at T0.\n\nThe burst is ~100 s in duration as seen by BAT.\n\nNITRATES results are consistent with a burst coming from outside the FOV, with DeltaLLHOut of -7 and are consistent with Fermi GBM's localization (GCN 34165).\n\nSee Section 9.1 and Figures 10 and 17 in the NITRATES paper for brief descriptions and interpretation of sqrt(TS), DeltaLLHPeak, and DeltaLLHOut.\n\nGUANO is a fully autonomous, extremely low latency, spacecraft commanding pipeline designed for targeted recovery of BAT event mode data around the times of compelling astrophysical events to enable more sensitive GRB searches.\n\nA live reporting of Swift/BAT event data recovered by GUANO can be found at: https://www.swift.psu.edu/guano/\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4ODE5MjUwLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.XVPOjWvQwVP6S-ebyQN6TkZk7o2Ba_epxvpnLjq51x4\n\n",
"published": "2023-07-08T12:27:34.890684Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-08T12:27:34.890705Z",
"modified": "2023-07-08T12:27:34.899810Z",
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{
"id": 1008,
"topic": "gcn.circular",
"uuid": "5225d637-76e0-4900-a9eb-25422b4185d4",
"title": "IceCube-230708A - IceCube observation of a high-energy neutrino candidate track-like event",
"submitter": "Hop gcn.circular",
"authors": "Massimiliano Lincetto at Ruhr-Universitaet Bochum <lincetto@astro.ruhr-uni-bochum.de>",
"data": {
"date": "23/07/08 12:32:13 GMT",
"from": "Massimiliano Lincetto at Ruhr-Universitaet Bochum <lincetto@astro.ruhr-uni-bochum.de>",
"title": "GCN CIRCULAR",
"number": "34170",
"subject": "IceCube-230708A - IceCube observation of a high-energy neutrino candidate track-like event"
},
"message_text": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nOn 23-07-08 at 08:17:05.21 UT IceCube detected a track-like event with a high probability of being of astrophysical origin.\n\nThe event was selected by the ICECUBE_Astrotrack_GOLD alert stream.\nThe average astrophysical neutrino purity for Gold alerts is 50%.\nThis alert has an estimated false alarm rate of 0.9371 events per year due to atmospheric backgrounds.\nThe IceCube detector was in a normal operating state at the time of detection.\nAfter the initial automated alert (https://gcn.gsfc.nasa.gov/notices_amon_g_b/138131_35302784.amon) more sophisticated reconstruction algorithms have been applied offline, with the direction refined to:\n\nDate: 23-07-08\nTime: 08:17:05.21 UT\nRA: 270.70 (+3.72 / -4.72 deg 90% PSF containment) J2000\nDec: -8.46 (+2.54 / -2.41 deg 90% PSF containment) J2000\n\nWe encourage follow-up by ground and space-based instruments to help identify a possible astrophysical source for the candidate neutrino.\n\nThree Fermi 4FGL-DR3 or 3FHL catalog sources are located in the 90% uncertainty region. The sources are 4FGL J1755.9+0953, 4FGL J1805.6+0615 (PSR J1805+0615) and 3FGL J1751.5+0939 (OT 081) respectively located at 2.22, 2.32 and 3.03 deg away from the best-fit position.\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\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4ODE5NTM2LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.fg5lJ3TqcVdOQXLLoPFGTDVHzQg2reCUa-I1vmLRrSM\n\n",
"published": "2023-07-08T12:32:21.111093Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-08T12:32:21.111114Z",
"modified": "2023-07-08T12:32:21.118958Z",
"nonlocalizedevents": [],
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},
{
"id": 1009,
"topic": "igwn.gwalert",
"uuid": "fbb3f315-e87a-49d8-987a-bd6956e7437f",
"title": "S230708ar - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"far": 1.976118e-05,
"time": "2023-07-08T12:36:09.236Z",
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"sequence_num": 1,
"time_created": "2023-07-08T12:36:54Z",
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"external_coinc": null
},
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"published": "2023-07-08T12:36:55.013326Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-08T12:36:55.013351Z",
"modified": "2023-07-08T12:36:55.020495Z",
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{
"id": 1010,
"topic": "igwn.gwalert",
"uuid": "f25d87ae-6eff-411e-8095-99dba2a6896a",
"title": "S230708ar - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"data": {
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"superevent_id": "S230708cf",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-08T23:10:02.029085Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-08T23:10:02.029116Z",
"modified": "2023-07-08T23:10:02.039100Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1035,
"topic": "igwn.gwalert",
"uuid": "b47c5a23-02f8-468f-bfe0-761f450b2761",
"title": "S230708cf - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230708cf/files/bayestar.multiorder.fits,1",
"gracedb": "https://gracedb.ligo.org/superevents/S230708cf/view/"
},
"event": {
"far": 1.550343988094984e-08,
"time": "2023-07-08T23:09:35.477Z",
"group": "CBC",
"search": "AllSky",
"area_50": 653.1802793855908,
"area_90": 2525.4345784404013,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.0,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "828fba3fcd687fa60e370974c5d04927",
"classification": {
"BBH": 0.989454090576771,
"BNS": 2.40713824302125e-22,
"NSBH": 2.3113331209517412e-10,
"Terrestrial": 0.010545909192095637
},
"skymap_version": 1,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-07-08T23:14:39Z",
"superevent_id": "S230708cf",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-08T23:14:40.935054Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-08T23:14:40.935080Z",
"modified": "2023-07-08T23:14:40.941673Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1036,
"topic": "igwn.gwalert",
"uuid": "4ef8b0bb-9c70-4837-8dd9-06a5eaf82aaa",
"title": "S230708cf - INITIAL",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230708cf/files/bayestar.multiorder.fits,1",
"gracedb": "https://gracedb.ligo.org/superevents/S230708cf/view/"
},
"event": {
"far": 1.550343988094984e-08,
"time": "2023-07-08T23:09:35.477Z",
"group": "CBC",
"search": "AllSky",
"area_50": 653.1802793855908,
"area_90": 2525.4345784404013,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.0,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "828fba3fcd687fa60e370974c5d04927",
"classification": {
"BBH": 0.989454090576771,
"BNS": 2.40713824302125e-22,
"NSBH": 2.3113331209517412e-10,
"Terrestrial": 0.010545909192095637
},
"skymap_version": 1,
"central_frequency": null
},
"alert_type": "INITIAL",
"sequence_num": 3,
"time_created": "2023-07-08T23:38:09Z",
"superevent_id": "S230708cf",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-08T23:38:10.336907Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-08T23:38:10.336933Z",
"modified": "2023-07-08T23:38:10.346794Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1037,
"topic": "gcn.circular",
"uuid": "ee5cef6c-ae07-416e-aa53-54ef0fe9a536",
"title": "LIGO/Virgo/KAGRA S230708cf: Identification of a GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "Nobuyuki Kanda at Nambu Yoichiro Institute of Theoretical and Experimental Physics, Osaka Metropolitan University <kanda@omu.ac.jp>",
"data": {
"date": "23/07/09 00:47:47 GMT",
"from": "Nobuyuki Kanda at Nambu Yoichiro Institute of Theoretical and Experimental Physics, Osaka Metropolitan University <kanda@omu.ac.jp>",
"title": "GCN CIRCULAR",
"number": "34173",
"subject": "LIGO/Virgo/KAGRA S230708cf: 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 S230708cf during\nreal-time processing of data from LIGO Hanford Observatory (H1) and\nLIGO Livingston Observatory (L1) at 2023-07-08 23:09:35.477 UTC (GPS\ntime: 1372892993.477). The candidate was found by the CWB [1], MBTA\n[2], GstLAL [3], and SPIIR [4] analysis pipelines.\n\nS230708cf is an event of interest because its false alarm rate, as\nestimated by the online analysis, is 1.6e-08 Hz, or about one in 2\nyears. The event's properties can be found at this URL:\n\nhttps://gracedb.ligo.org/superevents/S230708cf\n\nThe classification of the GW signal, in order of descending\nprobability, is BBH (99%), Terrestrial (1%), NSBH (<1%), or BNS (<1%).\n\nAssuming the candidate is astrophysical in origin, the probability\nthat the lighter compact object is consistent with a neutron star mass\n(HasNS) is <1%. [5] Using the masses and spins inferred from the\nsignal, the probability of matter outside the final compact object\n(HasRemnant) is <1%. [5] Both HasNS and HasRemnant consider the\nsupport of several neutron star equations of state. The probability\nthat 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,0, an initial localization generated by\nBAYESTAR [6], distributed via GCN notice about 25 seconds after the\ncandidate event time.\n * bayestar.multiorder.fits,1, an initial localization generated by\nBAYESTAR [6], distributed via GCN notice about 5 minutes after the\ncandidate event time.\n\nThe preferred sky map at this time is bayestar.multiorder.fits,1. For\nthe bayestar.multiorder.fits,1 sky map, the 90% credible region is\n2525 deg2. Marginalized over the whole sky, the a posteriori\nluminosity distance estimate is 2056 +/- 608 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] Aubin et al. CQG 38, 095004 (2021)\n [3] Tsukada et al. arXiv:2305.06286 (2023) and Ewing et al.\narXiv:2305.05625 (2023)\n [4] Chu et al. PRD 105, 024023 (2022)\n [5] Chatterjee et al. ApJ 896, 54 (2020)\n [6] Singer & Price PRD 93, 024013 (2016)\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4ODYzNjcyLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.wBUFsV2icpiY15_i67BlA0eTO7tLjYh-cJLKsK9Gc4s\n\n",
"published": "2023-07-09T00:47:57.864312Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-09T00:47:57.864333Z",
"modified": "2023-07-09T00:47:57.875134Z",
"nonlocalizedevents": [
{
"event_id": "S230708c"
}
],
"targets": []
},
{
"id": 1038,
"topic": "igwn.gwalert",
"uuid": "d97efd96-63ec-4eb2-873d-cfd12d30d3ae",
"title": "S230709i - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230709i/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230709i/view/"
},
"event": {
"far": 5.21408e-07,
"time": "2023-07-09T02:25:02.588Z",
"group": "Burst",
"search": "AllSky",
"area_50": 364.4632654329493,
"area_90": 2407.7236446995353,
"duration": 0.004617,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "a5d15bb1f92013207e0fd491feaf025a",
"classification": {},
"skymap_version": 0,
"central_frequency": 246.894882
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-07-09T02:26:41Z",
"superevent_id": "S230709i",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-09T02:26:43.196547Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-09T02:26:43.196573Z",
"modified": "2023-07-09T02:26:43.207640Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1039,
"topic": "igwn.gwalert",
"uuid": "efc40dbf-aed2-4d21-8bcb-6fa509a3b490",
"title": "S230709i - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230709i/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230709i/view/"
},
"event": {
"far": 5.21408e-07,
"time": "2023-07-09T02:25:02.588Z",
"group": "Burst",
"search": "AllSky",
"area_50": 364.4632654329493,
"area_90": 2407.7236446995353,
"duration": 0.004617,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "a5d15bb1f92013207e0fd491feaf025a",
"classification": {},
"skymap_version": 0,
"central_frequency": 246.894882
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-07-09T02:31:17Z",
"superevent_id": "S230709i",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-09T02:31:19.293657Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-09T02:31:19.293682Z",
"modified": "2023-07-09T02:31:19.300306Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1040,
"topic": "igwn.gwalert",
"uuid": "30b134ae-9e2a-4c5e-b065-ffdb5832b93a",
"title": "S230709m - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230709m/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230709m/view/"
},
"event": {
"far": 2.230554106649697e-05,
"time": "2023-07-09T03:42:42.154Z",
"group": "CBC",
"search": "AllSky",
"area_50": 549.3176907907088,
"area_90": 1790.8428154693272,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.0,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "f2060d78ae06510fd236ba7b9d8a7619",
"classification": {
"BBH": 0.0,
"BNS": 0.0018718625236763657,
"NSBH": 0.0,
"Terrestrial": 0.9981281374763237
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-07-09T03:43:10Z",
"superevent_id": "S230709m",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-09T03:43:11.203000Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-09T03:43:11.203029Z",
"modified": "2023-07-09T03:43:11.211542Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1041,
"topic": "igwn.gwalert",
"uuid": "66c09814-3a58-40ef-a474-79fdc4f7296f",
"title": "S230709m - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230709m/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230709m/view/"
},
"event": {
"far": 2.230554106649697e-05,
"time": "2023-07-09T03:42:42.154Z",
"group": "CBC",
"search": "AllSky",
"area_50": 549.3176907907088,
"area_90": 1790.8428154693272,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.0,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "f2060d78ae06510fd236ba7b9d8a7619",
"classification": {
"BBH": 0.0,
"BNS": 0.0018718625236763657,
"NSBH": 0.0,
"Terrestrial": 0.9981281374763237
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-07-09T03:47:44Z",
"superevent_id": "S230709m",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-09T03:47:45.995922Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-09T03:47:45.995947Z",
"modified": "2023-07-09T03:47:46.005643Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1042,
"topic": "igwn.gwalert",
"uuid": "45018655-61f3-4f5d-a832-d3836c9ddfc5",
"title": "S230709n - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230709n/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230709n/view/"
},
"event": {
"far": 2.063185092993081e-05,
"time": "2023-07-09T03:48:24.701Z",
"group": "CBC",
"search": "AllSky",
"area_50": 3829.6969030985547,
"area_90": 26525.03636325372,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 0.5481812612964257,
"HasMassGap": 0.03393567251461989,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "cb6241b06b49e411895e2d0a91740118",
"classification": {
"BBH": 0.18216866437495496,
"BNS": 0.0,
"NSBH": 0.02459490303266911,
"Terrestrial": 0.793236432592376
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-07-09T03:48:48Z",
"superevent_id": "S230709n",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-09T03:48:49.177889Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-09T03:48:49.177915Z",
"modified": "2023-07-09T03:48:49.184155Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1043,
"topic": "igwn.gwalert",
"uuid": "beb3d3e8-7eb4-4b1b-8462-884cf3280248",
"title": "S230709n - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230709n/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230709n/view/"
},
"event": {
"far": 2.063185092993081e-05,
"time": "2023-07-09T03:48:24.701Z",
"group": "CBC",
"search": "AllSky",
"area_50": 3829.6969030985547,
"area_90": 26525.03636325372,
"duration": null,
"pipeline": "spiir",
"properties": {
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"HasMassGap": 0.03393567251461989,
"HasRemnant": 0.0
},
"instruments": [
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"L1"
],
"significant": false,
"skymap_hash": "cb6241b06b49e411895e2d0a91740118",
"classification": {
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"BNS": 0.0,
"NSBH": 0.02459490303266911,
"Terrestrial": 0.793236432592376
},
"skymap_version": 0,
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},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-07-09T03:53:24Z",
"superevent_id": "S230709n",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-09T03:53:26.048393Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-09T03:53:26.048420Z",
"modified": "2023-07-09T03:53:26.055239Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1044,
"topic": "igwn.gwalert",
"uuid": "ffa15ce8-1f04-45e9-9eee-19c110df7c54",
"title": "S230709u - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230709u/files/olib.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230709u/view/"
},
"event": {
"far": 1.1975910467721276e-06,
"time": "2023-07-09T05:00:38.132Z",
"group": "Burst",
"search": "AllSky",
"area_50": 258.5548985778651,
"area_90": 1323.7759019093132,
"duration": 0.0010851028128873984,
"pipeline": "oLIB",
"properties": {},
"instruments": [
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"L1"
],
"significant": false,
"skymap_hash": "194846c6dbfe4c34daa100b95248e711",
"classification": {},
"skymap_version": 0,
"central_frequency": 594.2057551488904
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-07-09T05:10:54Z",
"superevent_id": "S230709u",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-09T05:10:56.241592Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-09T05:10:56.241619Z",
"modified": "2023-07-09T05:10:56.250864Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1045,
"topic": "igwn.gwalert",
"uuid": "2446f2da-bd76-41c2-b3c9-f5e938398d14",
"title": "S230709u - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230709u/files/olib.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230709u/view/"
},
"event": {
"far": 1.1975910467721276e-06,
"time": "2023-07-09T05:00:38.132Z",
"group": "Burst",
"search": "AllSky",
"area_50": 258.5548985778651,
"area_90": 1323.7759019093132,
"duration": 0.0010851028128873984,
"pipeline": "oLIB",
"properties": {},
"instruments": [
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"L1"
],
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"skymap_hash": "194846c6dbfe4c34daa100b95248e711",
"classification": {},
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"central_frequency": 594.2057551488904
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-07-09T05:15:28Z",
"superevent_id": "S230709u",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-09T05:15:29.280099Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-09T05:15:29.280128Z",
"modified": "2023-07-09T05:15:29.287117Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1046,
"topic": "igwn.gwalert",
"uuid": "b0ebcd23-7aec-4073-ae08-f67e70191002",
"title": "S230709ac - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
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{
"id": 1054,
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"authors": "K.L. Page at U Leicester <klp5@leicester.ac.uk>",
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"message_text": "\nA. Y. Lien (U Tampa), C. Gronwall (PSU) and K. L. Page (U Leicester)\nreport on behalf of the Neil Gehrels Swift Observatory Team:\n\nThe Swift Burst Alert Telescope (BAT) has triggered on a new event \n(trigger=1178410) and Swift has slewed to the location of this trigger. The \ntrigger time is believed to be no earlier than 07:30 UT. Given a brief gap in the\nTDRSS coverage we are unable to confirm the nature, location, or exact time of this \ntrigger until the full data have been downloaded, in approximately by around 10:00 \nUT. \n\nLimited XRT and UVOT data have been received. No counterpart is detected; however,\ngiven the location of the image centre, we infer that the BAT position must have\nbeen around RA,Dec = 162.052, -22.624 degrees (J2000.0), with an uncertainty of 12âÂÂ. \n\nBurst Advocate for this burst is A. Y. Lien (yarleen AT gmail.com) \nPlease contact the BA by email if you require additional information\nregarding Swift followup of this burst. In extremely urgent cases, after\ntrying the Burst Advocate, you can contact the Swift PI by phone (see\nSwift TOO web site for information: http://www.swift.psu.edu/)\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4ODk1MDU5LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.262ag3olj2V7BFPDCCjRnJfqGfWulLgz1GJxFK25E7I\n\n",
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"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230709bj/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230709bj/view/"
},
"event": {
"far": 1.136130413215142e-05,
"time": "2023-07-09T12:38:11.656Z",
"group": "CBC",
"search": "AllSky",
"area_50": 5484.783971454977,
"area_90": 18316.74451308851,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 0.8244724978099947,
"HasMassGap": 0.05584942834942835,
"HasRemnant": 0.00024818731210525866
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "14f96308466d0ef2e51c2c4156199ba0",
"classification": {
"BBH": 0.13228352778482755,
"BNS": 0.0,
"NSBH": 0.22376581807431462,
"Terrestrial": 0.6439506541408578
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-07-09T12:48:10Z",
"superevent_id": "S230709bj",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-09T12:48:11.815141Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-09T12:48:11.815169Z",
"modified": "2023-07-09T12:48:11.822256Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1059,
"topic": "igwn.gwalert",
"uuid": "bfeb85af-7607-46db-ba63-69f14a1f45c2",
"title": "S230709bi - INITIAL",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230709bi/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230709bi/view/"
},
"event": {
"far": 3.060764756445618e-09,
"time": "2023-07-09T12:27:27.202Z",
"group": "CBC",
"search": "AllSky",
"area_50": 834.6775301625056,
"area_90": 2936.688464593873,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.0,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "7f2f23681af86a1f3f1b0215b7d72bd0",
"classification": {
"BBH": 0.9971993157118272,
"BNS": 2.979350189449235e-23,
"NSBH": 2.215103485973378e-21,
"Terrestrial": 0.0028006842881728167
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "INITIAL",
"sequence_num": 3,
"time_created": "2023-07-09T13:24:25Z",
"superevent_id": "S230709bi",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-09T13:24:27.507444Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-09T13:24:27.507473Z",
"modified": "2023-07-09T13:24:27.515748Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1060,
"topic": "gcn.circular",
"uuid": "5307409e-3564-4bf4-96d5-de0abd260cc3",
"title": "LIGO/Virgo/KAGRA S230709bi: Identification of a GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "Nicolas Sanchis-Gual at University of Valencia <nicolas.sanchis-gual@ligo.org>",
"data": {
"date": "23/07/09 13:34:01 GMT",
"from": "Nicolas Sanchis-Gual at University of Valencia <nicolas.sanchis-gual@ligo.org>",
"title": "GCN CIRCULAR",
"number": "34175",
"subject": "LIGO/Virgo/KAGRA S230709bi: 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 S230709bi during\nreal-time processing of data from LIGO Hanford Observatory (H1) and\nLIGO Livingston Observatory (L1) at 2023-07-09 12:27:27.202 UTC (GPS\ntime: 1372940865.202). The candidate was found by the CWB [1], MBTA\n[2], GstLAL [3], PyCBC Live [4], and SPIIR [5] analysis pipelines.\n\nS230709bi is an event of interest because its false alarm rate, as\nestimated by the online analysis, is 3.1e-09 Hz, or about one in 10\nyears. The event's properties can be found at this URL:\n\nhttps://gracedb.ligo.org/superevents/S230709bi\n\nThe classification of the GW signal, in order of descending\nprobability, is BBH (>99%), Terrestrial (<1%), NSBH (<1%), or BNS\n(<1%).\n\nAssuming the candidate is astrophysical in origin, the probability\nthat the lighter compact object is consistent with a neutron star mass\n(HasNS) is <1%. [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,0, an initial localization generated by\nBAYESTAR [7], distributed via GCN notice about 25 seconds after the\ncandidate event time.\n * bayestar.multiorder.fits,1, an initial localization generated by\nBAYESTAR [7], distributed via GCN notice about 14 minutes after the\ncandidate event time.\n\nThe preferred sky map at this time is bayestar.multiorder.fits,1. For\nthe bayestar.multiorder.fits,1 sky map, the 90% credible region is\n2937 deg2. Marginalized over the whole sky, the a posteriori\nluminosity distance estimate is 5009 +/- 1547 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] Aubin et al. CQG 38, 095004 (2021)\n [3] Tsukada et al. arXiv:2305.06286 (2023) and Ewing et al.\narXiv:2305.05625 (2023)\n [4] Dal Canton et al. ApJ 923, 254 (2021)\n [5] Chu et al. PRD 105, 024023 (2022)\n [6] Chatterjee et al. ApJ 896, 54 (2020)\n [7] Singer & Price PRD 93, 024013 (2016)\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4OTA5NjQ2LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.8t5Y6bdU_w7yWEhjPRiANPnJJFWRS9u8NtX5PLn2mKY\n\n",
"published": "2023-07-09T13:34:11.492919Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-09T13:34:11.492946Z",
"modified": "2023-07-09T13:34:11.500694Z",
"nonlocalizedevents": [
{
"event_id": "S230709b"
}
],
"targets": []
},
{
"id": 1061,
"topic": "gcn.circular",
"uuid": "4423557d-dfed-4206-af63-7af52eb5ad72",
"title": "IceCube-230707A: Upper limits from a search for additional neutrino events in IceCube",
"submitter": "Hop gcn.circular",
"authors": "Jessie Thwaites at IceCube/U Wisc-Madison <thwaites@wisc.edu>",
"data": {
"date": "23/07/09 16:29:57 GMT",
"from": "Jessie Thwaites at IceCube/U Wisc-Madison <thwaites@wisc.edu>",
"title": "GCN CIRCULAR",
"number": "34176",
"subject": "IceCube-230707A: Upper limits from a search for additional neutrino events in IceCube"
},
"message_text": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nIceCube has performed a search [1] for additional track-like muon neutrino events arriving from the direction of IceCube-230707A (https://gcn.nasa.gov/circulars/34163) in a time range of 1000 seconds centered on the alert event time (2023-07-07 16:50:30.030 UTC to 2023-07-07 17:07:10.030 UTC) during which IceCube was collecting good quality data. Excluding the event that prompted the alert, zero track-like events are found within the 90% containment region of IceCube-230707A. The IceCube sensitivity to neutrino point sources with an E^-2.5 spectrum (E^2 dN/dE at 1 TeV) within the locations spanned by the 90% spatial containment region of IceCube-230707A is 1.5e-01 GeV cm^-2 in a 1000 second time window. 90% of events IceCube would detect from a source at this declination with an E^-2.5 spectrum have energies in the approximate energy range between 3e+02 GeV and 2e+05 GeV.\n\nA subsequent search was performed including 2 days of data centered on the alert event time (2023-07-06 16:58:50.030 UTC to 2023-07-08 16:58:50.030 UTC). In this case, we report a p-value of 1.00, consistent with no significant excess of track events. The IceCube sensitivity to neutrino point sources with an E^-2.5 spectrum (E^2 dN/dE at 1 TeV) within the locations spanned by the 90% spatial containment region of IceCube-230707A is 1.6e-01 GeV cm^-2 in a 2 day time window.\n\nThe IceCube Neutrino Observatory is a cubic-kilometer neutrino detector operating at the geographic South Pole, Antarctica. The IceCube realtime alert point of contact can be reached at roc@icecube.wisc.edu.\n\n[1] IceCube Collaboration, R. Abbasi et al., ApJ 910 4 (2021)\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4OTIwMjAyLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.HPSzTojTeh_NZqFBUrs06G0arIFBMjuMW5xMqDKkYBk\n\n",
"published": "2023-07-09T16:30:11.465661Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-09T16:30:11.465685Z",
"modified": "2023-07-09T16:30:11.476210Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1062,
"topic": "gcn.circular",
"uuid": "360a6ea3-817f-472d-a445-ff03298e0423",
"title": "IceCube-230707B: Upper limits from a search for additional neutrino events in IceCube",
"submitter": "Hop gcn.circular",
"authors": "Jessie Thwaites at IceCube/U Wisc-Madison <thwaites@wisc.edu>",
"data": {
"date": "23/07/09 16:30:57 GMT",
"from": "Jessie Thwaites at IceCube/U Wisc-Madison <thwaites@wisc.edu>",
"title": "GCN CIRCULAR",
"number": "34177",
"subject": "IceCube-230707B: Upper limits from a search for additional neutrino events in IceCube"
},
"message_text": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nIceCube has performed a search [1] for additional track-like muon neutrino events arriving from the direction of IceCube-230707B (https://gcn.nasa.gov/circulars/34166) in a time range of 1000 seconds centered on the alert event time (2023-07-07 18:48:31.430 UTC to 2023-07-07 19:05:11.430 UTC) during which IceCube was collecting good quality data. Excluding the event that prompted the alert, zero track-like events are found within the 90% containment region of IceCube-230707B. The IceCube sensitivity to neutrino point sources with an E^-2.5 spectrum (E^2 dN/dE at 1 TeV) within the locations spanned by the 90% spatial containment region of IceCube-230707B ranges from 1.3e-01 to 1.4e-01 GeV cm^-2 in a 1000 second time window. 90% of events IceCube would detect from a source at this declination with an E^-2.5 spectrum have energies in the approximate energy range between 2e+02 GeV and 1e+05 GeV.\n\nA subsequent search was performed including 2 days of data centered on the alert event time (2023-07-06 18:56:51.430 UTC to 2023-07-08 18:56:51.430 UTC). In this case, we report a p-value of 0.73, consistent with no significant excess of track events. The IceCube sensitivity to neutrino point sources with an E^-2.5 spectrum (E^2 dN/dE at 1 TeV) within the locations spanned by the 90% spatial containment region of IceCube-230707B ranges from 1.5e-01 to 1.7e-01 GeV cm^-2 in a 2 day time window.\n\nThe IceCube Neutrino Observatory is a cubic-kilometer neutrino detector operating at the geographic South Pole, Antarctica. The IceCube realtime alert point of contact can be reached at roc@icecube.wisc.edu.\n\n[1] 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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4OTIwMjYwLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.znfZiQ9Apgc67qOlMxI_pVDHM4_lK7jFfEoG1w9hfyo\n\n",
"published": "2023-07-09T16:31:05.583661Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-09T16:31:05.583681Z",
"modified": "2023-07-09T16:31:05.590580Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1063,
"topic": "gcn.circular",
"uuid": "a18cfc9b-1e7f-467f-9a0f-58255945c330",
"title": "IceCube-230708A: Upper limits from a search for additional neutrino events in IceCube",
"submitter": "Hop gcn.circular",
"authors": "Jessie Thwaites at IceCube/U Wisc-Madison <thwaites@wisc.edu>",
"data": {
"date": "23/07/09 16:33:12 GMT",
"from": "Jessie Thwaites at IceCube/U Wisc-Madison <thwaites@wisc.edu>",
"title": "GCN CIRCULAR",
"number": "34178",
"subject": "IceCube-230708A: Upper limits from a search for additional neutrino events in IceCube"
},
"message_text": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nIceCube has performed a search [1] for additional track-like muon neutrino events arriving from the direction of IceCube-230708A (https://gcn.nasa.gov/circulars/34170) in a time range of 1000 seconds centered on the alert event time (2023-07-08 08:08:45.210 UTC to 2023-07-08 08:25:25.210 UTC) during which IceCube was collecting good quality data. Excluding the event that prompted the alert, zero track-like events are found within the 90% containment region of IceCube-230708A.The IceCube sensitivity to neutrino point sources with an E^-2.5 spectrum (E^2 dN/dE at 1 TeV) within the locations spanned by the 90% spatial containment region of IceCube-230708A ranges from 1.3e-01 to 1.4e-01 GeV cm^-2 in a 1000 second time window. 90% of events IceCube would detect from a source at this declination with an E^-2.5 spectrum have energies in the approximate energy range between 2e+02 GeV and 1e+05 GeV.\n\nA subsequent search was performed including 2 days of data centered on the alert event time (2023-07-07 08:17:05.210 UTC to 2023-07-09 08:17:05.210 UTC). In this case, we report a p-value of 1.00, consistent with no significant excess of track events. The IceCube sensitivity to neutrino point sources with an E^-2.5 spectrum (E^2 dN/dE at 1 TeV) within the locations spanned by the 90% spatial containment region of IceCube-230708A is 1.5e-01 GeV cm^-2 in a 2 day time window.\n\nThe IceCube Neutrino Observatory is a cubic-kilometer neutrino detector operating at the geographic South Pole, Antarctica. The IceCube realtime alert point of contact can be reached at roc@icecube.wisc.edu.\n\n[1] 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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4OTIwMzk0LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.CnlE8207cJHKObhWqL9nS5HcwPRKItRQsHl3p2Su2YM\n\n",
"published": "2023-07-09T16:33:20.059164Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-09T16:33:20.059183Z",
"modified": "2023-07-09T16:33:20.070803Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1064,
"topic": "gcn.circular",
"uuid": "410a1f1c-8373-4f2f-98bc-34f1832c71c4",
"title": "GRB 230709B: BALROG localization (Fermi Trigger 710614579 / GRB 230709706)",
"submitter": "Hop gcn.circular",
"authors": "Jochen Greiner at MPE <jcgrog@mpe.mpg.de>",
"data": {
"date": "23/07/09 17:19:33 GMT",
"from": "Jochen Greiner at MPE <jcgrog@mpe.mpg.de>",
"title": "GCN CIRCULAR",
"number": "34179",
"subject": "GRB 230709B: BALROG localization (Fermi Trigger 710614579 / GRB 230709706)"
},
"message_text": "B. Biltzinger, T. Preis, J. Burgess & J. Greiner (all MPE Garching) report:\n\nThe public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger\n710614579 at 16:56:14 on 09 July 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) = 87.0+/-1.2 deg\nDecl.(2000.0) = -3.0+/-0.8 deg\nWe estimate an additional systematic error of 1 deg.\n\nFurther details are available at:\nhttps://grb.mpe.mpg.de/grb/GRB230709706/\n\nThe Healpix map can be downloaded from:\nhttps://grb.mpe.mpg.de/grb/GRB230709706/healpix\n\nThe location parameters are available as JSON at:\nhttps://grb.mpe.mpg.de/grb/GRB230709706/json\n\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4OTIzMTc4LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.wVCeeb0xq8ozhlmG6uvA0LuSqXDj7c536EMHilOa0nQ\n\n",
"published": "2023-07-09T17:19:43.676363Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-09T17:19:43.676383Z",
"modified": "2023-07-09T17:19:43.683002Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1065,
"topic": "igwn.gwalert",
"uuid": "39ef77ec-447d-46d4-9a3c-828522c5d1c0",
"title": "S230630am - UPDATE",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230630am/files/bayestar.multiorder.fits,1",
"gracedb": "https://gracedb.ligo.org/superevents/S230630am/view/"
},
"event": {
"far": 2.412787446688886e-08,
"time": "2023-06-30T12:58:06.902Z",
"group": "CBC",
"search": "AllSky",
"area_50": 1166.618166843522,
"area_90": 3964.823179977553,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.0,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "dddf1d39b5040758b271f7ccd1758911",
"classification": {
"BBH": 0.9825057756089519,
"BNS": 9.896791560423668e-16,
"NSBH": 7.656199763323968e-14,
"Terrestrial": 0.01749422439097048
},
"skymap_version": 1,
"central_frequency": null
},
"alert_type": "UPDATE",
"sequence_num": 4,
"time_created": "2023-07-09T20:39:51Z",
"superevent_id": "S230630am",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-09T20:39:51.972270Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-09T20:39:51.972296Z",
"modified": "2023-07-09T20:39:51.981058Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1066,
"topic": "gcn.circular",
"uuid": "4aba5629-9449-4dfd-9420-3172c4a9dfce",
"title": "LIGO/Virgo/KAGRA S230630am: Updated Sky localization",
"submitter": "Hop gcn.circular",
"authors": "jgolomb@caltech.edu",
"data": {
"date": "23/07/09 20:42:23 GMT",
"from": "jgolomb@caltech.edu",
"title": "GCN CIRCULAR",
"number": "34180",
"subject": "LIGO/Virgo/KAGRA S230630am: Updated Sky localization"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:\n\nWe have conducted further analysis of the LIGO Hanford Observatory (H1) and LIGO Livingston Observatory (L1) data around the time of the compact binary merger (CBC) candidate S230630am (GCN Circular 34124). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.multiorder.fits,0, distributed via GCN Notice, is available for retrieval from the GraceDB event page:\n\nhttps://gracedb.ligo.org/superevents/S230630am\n\nFor the Bilby.multiorder.fits,0 sky map, the 90% credible region is 3965 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 5336 +/- 2001 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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4OTM1MzQ4LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.2Ob3VO784OOaleMUSgedSd18nE_XJicoTyQcops1pfU\n\n",
"published": "2023-07-09T20:42:33.279061Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-09T20:42:33.279084Z",
"modified": "2023-07-09T20:42:33.285688Z",
"nonlocalizedevents": [
{
"event_id": "S230630a"
}
],
"targets": []
},
{
"id": 1067,
"topic": "gcn.circular",
"uuid": "51bb9f2a-484a-4a17-bd86-31d2781d95e9",
"title": "LIGO/Virgo/KAGRA S230630am: Updated Sky localization",
"submitter": "Hop gcn.circular",
"authors": "jgolomb@caltech.edu",
"data": {
"date": "23/07/09 20:42:50 GMT",
"from": "jgolomb@caltech.edu",
"title": "GCN CIRCULAR",
"number": "34181",
"subject": "LIGO/Virgo/KAGRA S230630am: Updated Sky localization"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:\n\nWe have conducted further analysis of the LIGO Hanford Observatory (H1) and LIGO Livingston Observatory (L1) data around the time of the compact binary merger (CBC) candidate S230630am (GCN Circular 34124). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.multiorder.fits,0, distributed via GCN Notice, is available for retrieval from the GraceDB event page:\n\nhttps://gracedb.ligo.org/superevents/S230630am\n\nFor the Bilby.multiorder.fits,0 sky map, the 90% credible region is 3965 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 5336 +/- 2001 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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4OTM1MzczLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.Pvk2bupGjea2tOP4-hefRYSwQABf11It7bJdP3lT_uw\n\n",
"published": "2023-07-09T20:42:55.548498Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-09T20:42:55.548517Z",
"modified": "2023-07-09T20:42:55.554853Z",
"nonlocalizedevents": [
{
"event_id": "S230630a"
}
],
"targets": []
},
{
"id": 1068,
"topic": "gcn.circular",
"uuid": "ad1c325c-8854-4ce3-9a22-56c719ed6b3b",
"title": "Fermi-LAT gamma-ray observations of IceCube-230707A",
"submitter": "Hop gcn.circular",
"authors": "Sara Buson at GSFC/Fermi <sara.buson@gmail.com>",
"data": {
"date": "23/07/09 21:12:40 GMT",
"from": "Sara Buson at GSFC/Fermi <sara.buson@gmail.com>",
"title": "GCN CIRCULAR",
"number": "34182",
"subject": "Fermi-LAT gamma-ray observations of IceCube-230707A"
},
"message_text": "S. Garrappa (Weizmann Institute of Science), S. Buson (Univ. Wuerzburg), J. Sinapius (DESY) and C. Bartolini (INFN Bari) on behalf of the Fermi-LAT collaboration:\nWe report an analysis of observations of the vicinity of the IC230707A high-energy neutrino event (GCN 34163) with all-sky survey data from the Large Area Telescope (LAT), on board the Fermi Gamma-ray Space Telescope. The IceCube event was detected on 2023-07-07 at 16:58:50.03 UT (T0) with J2000 position RA = 269.03 (+0.88, -0.76) deg, Decl. = -1.94 (+0.53, -0.54) deg (90% PSF containment). No cataloged gamma-ray (>100 MeV; The Fermi-LAT collaboration 2022, ApJS, 260, 53) sources are located within the 90% IC230707A localization region.\nWe searched for intermediate (days to years) timescale emission from a new gamma-ray source. Preliminary analysis indicates no significant (> 5 sigma) new excess emission (> 100 MeV) at the IC230707A best-fit position. Assuming a power-law spectrum (photon index = 2.0 fixed) for a point source at the IC230707A best-fit position, the >100 MeV flux upper limit (95% confidence) is < 6.8e-10 ph cm^-2 s^-1 for ~15-years (2008-08-04 to 2023-07-07 UTC), and < 5.2e-8 (< 3.2e-7) ph cm^-2 s^-1 for a 1-month (1-day) integration time before T0.\n\nSince Fermi normally operates in an all-sky scanning mode, regular monitoring of this region will continue. For these observations the Fermi-LAT contact persons are S. Garrappa (simone.garrappa at weizmann.ac.il), J. Sinapius (jonas.sinapius at desy.de <http://desy.de/>) and S. Buson (sara.buson at uni-wuerzburg.de <http://uni-wuerzburg.de/>).\nThe Fermi-LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4OTM3MTY1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.9DqETWI7fj0aqucyHEpQRU1V2Y5FxcpGC6upiu1Ua68\n\n",
"published": "2023-07-09T21:12:50.878114Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-09T21:12:50.878134Z",
"modified": "2023-07-09T21:12:50.886701Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1069,
"topic": "gcn.circular",
"uuid": "512c49f1-600d-4d06-ba26-d052236d4bfb",
"title": "Fermi-LAT gamma-ray observations of IceCube-230707B",
"submitter": "Hop gcn.circular",
"authors": "Sara Buson at GSFC/Fermi <sara.buson@gmail.com>",
"data": {
"date": "23/07/09 21:13:08 GMT",
"from": "Sara Buson at GSFC/Fermi <sara.buson@gmail.com>",
"title": "GCN CIRCULAR",
"number": "34183",
"subject": "Fermi-LAT gamma-ray observations of IceCube-230707B"
},
"message_text": "S. Garrappa (Weizmann Institute of Science), S. Buson (Univ. Wuerzburg), J. Sinapius (DESY) and C. Bartolini (INFN Bari) on behalf of the Fermi-LAT collaboration:\nWe report an analysis of observations of the vicinity of the IC230707B high-energy neutrino event (GCN 34166) with all-sky survey data from the Large Area Telescope (LAT), on board the Fermi Gamma-ray Space Telescope. The IceCube event was detected on 2023-07-07 at 18:56:51.44 UT (T0) with J2000 position RA = 127.18 (+11.41, -8.66) deg, Decl. = 20.74 (+11.41, -9.16) deg (90% PSF containment). Several cataloged gamma-ray (>100 MeV; The Fermi-LAT collaboration 2022, ApJS, 260, 53) sources are located within the 90% IC230707B localization region. Based on a preliminary analysis of the LAT data over a month and day timescale prior T0, these objects are not significantly detected at gamma rays.\nWe searched for intermediate (days to years) timescale emission from a new gamma-ray source. Preliminary analysis indicates no significant (> 5 sigma) new excess emission (> 100 MeV) at the IC230707B best-fit position. Assuming a power-law spectrum (photon index = 2.0 fixed) for a point source at the IC230707B best-fit position, the >100 MeV flux upper limit (95% confidence) is < 1.1e-10 ph cm^-2 s^-1 for ~15-years (2008-08-04 to 2023-07-07 UTC), and < 5.5e-9 (< 1.3e-7) ph cm^-2 s^-1 for a 1-month (1-day) integration time before T0.\n\nSince Fermi normally operates in an all-sky scanning mode, regular monitoring of this region will continue. For these observations the Fermi-LAT contact persons are S. Garrappa (simone.garrappa at weizmann.ac.il <http://eizmann.ac.il/>), J. Sinapius (jonas.sinapius at desy.de <http://desy.de/>) and S. Buson (sara.buson at uni-wuerzburg.de <http://uni-wuerzburg.de/>).\nThe Fermi-LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4OTM3MTkwLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.spoJLYZDDFiNZkWvX_Xq_diAqMcUm2Gyxczhq6KBoGg\n\n",
"published": "2023-07-09T21:13:13.090073Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-09T21:13:13.090093Z",
"modified": "2023-07-09T21:13:13.096493Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1070,
"topic": "gcn.circular",
"uuid": "b9bb2ae0-a755-45d3-a59b-4d1521ae2e8e",
"title": "Fermi-LAT gamma-ray observations of IceCube-230708A",
"submitter": "Hop gcn.circular",
"authors": "Sara Buson at GSFC/Fermi <sara.buson@gmail.com>",
"data": {
"date": "23/07/09 21:14:28 GMT",
"from": "Sara Buson at GSFC/Fermi <sara.buson@gmail.com>",
"title": "GCN CIRCULAR",
"number": "34184",
"subject": "Fermi-LAT gamma-ray observations of IceCube-230708A"
},
"message_text": "S. Garrappa (Weizmann Institute of Science), S. Buson (Univ. Wuerzburg), J. Sinapius (DESY) and C. Bartolini (INFN Bari) on behalf of the Fermi-LAT collaboration:\n\nWe report an analysis of observations of the vicinity of the IC230708A high-energy neutrino event (GCN 34170) with all-sky survey data from the Large Area Telescope (LAT), on board the Fermi Gamma-ray Space Telescope. The IceCube event was detected on 2023-07-08 at 08:17:05.21 UT (T0) with J2000 position RA = 270.70 (+3.72, -4.72 ) deg, Decl. = -8.46 (+2.54, -2.41) deg (90% PSF containment). Three cataloged gamma-ray (>100 MeV; The Fermi-LAT collaboration 2022, ApJS, 260, 53) sources are located within the 90% IC230708A localization region. Based on a preliminary analysis of the LAT data over a month and day timescale prior T0, these objects are not significantly detected at gamma rays.\n\nWe searched for intermediate (days to years) timescale emission from a new gamma-ray source. Preliminary analysis indicates no significant (> 5 sigma) new excess emission (> 100 MeV) at the IC230708A best-fit position. Assuming a power-law spectrum (photon index = 2.0 fixed) for a point source at the IC230708A best-fit position, the >100 MeV flux upper limit (95% confidence) is < 1.2e-9 ph cm^-2 s^-1 for ~15-years (2008-08-04 to 2023-07-08 UTC), and < 3.5e-8 (< 1.1e-7) ph cm^-2 s^-1 for a 1-month (1-day) integration time before T0.\n\nSince Fermi normally operates in an all-sky scanning mode, regular monitoring of this region will continue. For these observations the Fermi-LAT contact persons are S. Garrappa (simone.garrappa at weizmann.ac.il <http://eizmann.ac.il/>), J. Sinapius (jonas.sinapius at desy.de <http://desy.de/>) and S. Buson (sara.buson at uni-wuerzburg.de <http://uni-wuerzburg.de/>).\n\nThe Fermi-LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4OTM3MjcwLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.S4DgtIRWtbOwYt52i_gCznxOl2AKdr0YtaJQl6pHXFU\n\n",
"published": "2023-07-09T21:14:34.279088Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-09T21:14:34.279108Z",
"modified": "2023-07-09T21:14:34.285842Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1071,
"topic": "gcn.circular",
"uuid": "bf3b7557-7d5a-4090-b48d-0eae7672da91",
"title": "IceCube-230707A: No candidates from the Zwicky Transient Facility",
"submitter": "Hop gcn.circular",
"authors": "Robert Stein at Caltech <rdstein@astro.caltech.edu>",
"data": {
"date": "23/07/09 21:14:40 GMT",
"from": "Robert Stein at Caltech <rdstein@astro.caltech.edu>",
"title": "GCN CIRCULAR",
"number": "34185",
"subject": "IceCube-230707A: No candidates from the Zwicky Transient Facility"
},
"message_text": "Robert Stein (Caltech), Sven Weimann (Ruhr University Bochum), Simeon Reusch (DESY), Jannis Necker (DESY), Anna Franckowiak (DESY/Ruhr University Bochum) and Vishwajeet Swain (IITB) report:\n\nOn behalf of the Zwicky Transient Facility (ZTF) and Global Relay of Observatories Watching Transients Happen (GROWTH) collaborations:\n\nAs part of the ZTF neutrino follow up program (Stein et al. 2023), we observed the localization region of the neutrino event IceCube-230707A (Lincetto et. al, GCN 34163) with the Palomar 48-inch telescope, equipped with the 47 square degree ZTF camera (Bellm et al. 2019, Graham et al. 2019). We started observations in the g- and r-band beginning at 2023-07-08 04:57 UTC, approximately 12.0 hours after event time. We covered 87.6% (1.4 sq deg) of the reported localization region. This estimate accounts for chip gaps. Each exposure was 300s with a typical depth of 21.0 mag.\n\nThe images were processed in real-time through the ZTF reduction and image subtraction pipelines at IPAC to search for potential counterparts (Masci et al. 2019). AMPEL (Nordin et al. 2019, Stein et al. 2021) was used to search the alerts database for candidates. We reject stellar sources (Tachibana and Miller 2018) and moving objects, and apply machine learning algorithms (Mahabal et al. 2019).\n\nNo candidate counterparts were detected.\n\nAdditional observations are planned as part of our standard neutrino follow-up procedure, and any candidates will be reported.\n\nZTF and GROWTH are worldwide collaborations comprising Caltech, USA; IPAC, USA; WIS, Israel; OKC, Sweden; JSI/UMd, USA; DESY, Germany; TANGO, Taiwan; UW Milwaukee, USA; LANL, USA; TCD, Ireland; IN2P3, France.\n\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).\nAlert filtering is performed with the nuztf package (Stein et al. 2021, https://github.com/desy-multimessenger/nuztf).\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4OTM3MjgyLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.lASCnc0zUv_1duoTroYpLH1rP5bPvrbMUQs3SVwVSWE\n\n",
"published": "2023-07-09T21:14:45.320753Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-09T21:14:45.320773Z",
"modified": "2023-07-09T21:14:45.327433Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1072,
"topic": "igwn.gwalert",
"uuid": "5a3f23c4-94e2-472d-a3b4-c997508ead1c",
"title": "S230707ai - UPDATE",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230707ai/files/bayestar.multiorder.fits,2",
"gracedb": "https://gracedb.ligo.org/superevents/S230707ai/view/"
},
"event": {
"far": 1.376458e-08,
"time": "2023-07-07T12:40:47.349Z",
"group": "CBC",
"search": "AllSky",
"area_50": 917.5577776271083,
"area_90": 3180.922915350323,
"duration": null,
"pipeline": "MBTA",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.0,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "f6d83edb011f99211bb2164d6221a0b3",
"classification": {
"BBH": 0.9510657,
"BNS": 0.0,
"NSBH": 0.0,
"Terrestrial": 0.0489343
},
"skymap_version": 2,
"central_frequency": null
},
"alert_type": "UPDATE",
"sequence_num": 4,
"time_created": "2023-07-09T21:17:19Z",
"superevent_id": "S230707ai",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-09T21:17:20.669797Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-09T21:17:20.669826Z",
"modified": "2023-07-09T21:17:20.678027Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1073,
"topic": "gcn.circular",
"uuid": "70441bed-f812-41b9-9728-6c8e0c2d452d",
"title": "LIGO/Virgo/KAGRA S230707ai: Updated Sky localization",
"submitter": "Hop gcn.circular",
"authors": "jgolomb@caltech.edu",
"data": {
"date": "23/07/09 21:20:22 GMT",
"from": "jgolomb@caltech.edu",
"title": "GCN CIRCULAR",
"number": "34186",
"subject": "LIGO/Virgo/KAGRA S230707ai: Updated Sky localization"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:\n\nWe have conducted further analysis of the LIGO Hanford Observatory (H1) and LIGO Livingston Observatory (L1) data around the time of the compact binary merger (CBC) candidate S230707ai (GCN Circular 34161). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.multiorder.fits,0, distributed via GCN Notice, is available for retrieval from the GraceDB event page:\n\nhttps://gracedb.ligo.org/superevents/S230707ai\n\nFor the Bilby.multiorder.fits,0 sky map, the 90% credible region is 3181 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 4074 +/- 1485 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 [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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4OTM3NjI1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.UHUQBq2ybcMdwMddkKJMjpOTCzlhFUEigoYcK-05KZM\n\n",
"published": "2023-07-09T21:20:30.335137Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-09T21:20:30.335160Z",
"modified": "2023-07-09T21:20:30.346804Z",
"nonlocalizedevents": [
{
"event_id": "S230707a"
}
],
"targets": []
},
{
"id": 1074,
"topic": "gcn.circular",
"uuid": "56605321-4630-4c26-a2c1-e8db795e998e",
"title": "GRB 230709C: BALROG localization (Fermi Trigger 710617111 / GRB 230709735)",
"submitter": "Hop gcn.circular",
"authors": "Jochen Greiner at MPE <jcgrog@mpe.mpg.de>",
"data": {
"date": "23/07/09 22:19:05 GMT",
"from": "Jochen Greiner at MPE <jcgrog@mpe.mpg.de>",
"title": "GCN CIRCULAR",
"number": "34187",
"subject": "GRB 230709C: BALROG localization (Fermi Trigger 710617111 / GRB 230709735)"
},
"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\n710617111 at 17:38:26 on 09 July 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) = 267.1+/-6.5 deg\nDecl.(2000.0) = -71.4+/-1.1 deg\nWe estimate an additional systematic error of 1 deg.\n\nFurther details are available at:\nhttps://grb.mpe.mpg.de/grb/GRB230709735/\n\nThe Healpix map can be downloaded from:\nhttps://grb.mpe.mpg.de/grb/GRB230709735/healpix\n\nThe location parameters are available as JSON at:\nhttps://grb.mpe.mpg.de/grb/GRB230709735/json\n\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4OTQxMTUwLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.Mg7VZMyTS7wd9Oy8VBI-GOV-9OkRsm_SL_FAUE8omAU\n\n",
"published": "2023-07-09T22:19:16.354413Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-09T22:19:16.354437Z",
"modified": "2023-07-09T22:19:16.363228Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1075,
"topic": "gcn.circular",
"uuid": "62130b49-77df-4d07-9a6c-9c61906d030c",
"title": "GRB 230703A detected with multiple GRID detectors",
"submitter": "Hop gcn.circular",
"authors": "GRID Student Team at Tsinghua University <grid@tsinghua.edu.cn>",
"data": {
"date": "23/07/10 06:21:09 GMT",
"from": "GRID Student Team at Tsinghua University <grid@tsinghua.edu.cn>",
"title": "GCN CIRCULAR",
"number": "34188",
"subject": "GRB 230703A detected with multiple GRID detectors"
},
"message_text": "Chenyu Wang and Zirui Yang report on behalf of the GRID Collaboration:\n\nThe long-duration GRB 230703A (Fermi GBM Trigger Number bn230703954) was also detected with three GRID detectors, GRID-03B, GRID-04, and GRID-07, onboard two different CubeSats.\n\nThe event was triggered by GRID on 2023-07-03 at 22:53:07.4 UTC. The GRID light curves show a two-pulse temporal structure, each with a fast rise exponential decay like shape. The measured burst duration (T90) in the 30-2000 keV range is approximately 18.6 +/- 1.2 seconds. The GRB position derived from the GRID data is consistent with the burst location reported by Fermi/GBM (GCN Notice #710117592). An origin from Cygnus X-1 can be ruled out as the source is occulted by Earth in the view of GRID-03B. Further analysis of the data is currently in progress.\n\nGRID is a student-led project to monitor the transient gamma-ray sky with multiple detectors onboard different nanosatellites in the era of multi-messenger astronomy. For more information about GRID, please refer to the following references: https://doi.org/10.1007/s10686-019-09636-w and https://doi.org/10.1007/s10686-021-09819-4.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4OTcwMDc1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.iE5sfNSkhwzKML07GTgnOTjz-1vvaPkBRri-eueJX08\n\n",
"published": "2023-07-10T06:21:24.166431Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-10T06:21:24.166450Z",
"modified": "2023-07-10T06:21:24.174239Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1076,
"topic": "igwn.gwalert",
"uuid": "c0a8fb22-9762-4e52-bb1d-83f51210c369",
"title": "S230708cf - UPDATE",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230708cf/files/bayestar.multiorder.fits,2",
"gracedb": "https://gracedb.ligo.org/superevents/S230708cf/view/"
},
"event": {
"far": 1.550343988094984e-08,
"time": "2023-07-08T23:09:35.477Z",
"group": "CBC",
"search": "AllSky",
"area_50": 440.8389871471655,
"area_90": 2031.0906214110241,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.0,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "644db9dc9a94f13bf941d358ff50add9",
"classification": {
"BBH": 0.989454090576771,
"BNS": 2.40713824302125e-22,
"NSBH": 2.3113331209517412e-10,
"Terrestrial": 0.010545909192095637
},
"skymap_version": 2,
"central_frequency": null
},
"alert_type": "UPDATE",
"sequence_num": 4,
"time_created": "2023-07-10T07:07:53Z",
"superevent_id": "S230708cf",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-10T07:07:55.765013Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-10T07:07:55.765042Z",
"modified": "2023-07-10T07:07:55.776770Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1077,
"topic": "gcn.circular",
"uuid": "e4351cd2-62ee-4be8-a9f7-40354ab95629",
"title": "GRB 230707B: CALET Gamma-Ray Burst Monitor detection",
"submitter": "Hop gcn.circular",
"authors": "Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>",
"data": {
"date": "23/07/10 07:10:03 GMT",
"from": "Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>",
"title": "GCN CIRCULAR",
"number": "34189",
"subject": "GRB 230707B: CALET Gamma-Ray Burst Monitor detection"
},
"message_text": "S. Torii (Waseda U), A. Yoshida, T. Sakamoto, S. Sugita (AGU),\nY. Kawakubo (LSU), K. Yamaoka (Nagoya U), S. Nakahira (JAXA),\nY. Asaoka (ICRR), Y. Akaike, K. Kobayashi (Waseda U),\nY. Shimizu, T. Tamura (Kanagawa U), N. Cannady (GSFC/UMBC),\nM. L. Cherry (LSU), S. Ricciarini (U of Florence),\nP. S. Marrocchesi (U of Siena),\nand the CALET collaboration:\n\nThe long GRB 230707B (Fermi GBM Final Real-time Localization:\nFermi GBM team, GCN Circ. 34165; Swift/BAT-GUANO detection:\nDeLaunay et al., GCN Circ. 34169) triggered the CALET Gamma-ray\nBurst Monitor (CGBM) at 18:46:18.95 UTC on 7 July 2023\n(http://cgbm.calet.jp/cgbm_trigger/flight/1372790743/index.html).\nThe burst signal was seen by all CGBM detectors.\n\nThe burst light curve shows a multi-peaked structure that starts\nat T+1.0 sec, peaks at T+82.1 sec, and ends at T+108.1 sec.\nThe T90 and T50 durations measured by the SGM data are 94.6 +/- 1.6 sec\nand 52.1 +/- 1.2 sec (40-1000 keV), respectively.\n\nThe ground-processed light curve is available at\n\nhttp://cgbm.calet.jp/cgbm_trigger/ground/1372790743/\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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4OTczMDA4LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.sglsXMZMrwK2QQgEAXQCvaLa2J7Tvsz-9egAVNO4TE8\n\n",
"published": "2023-07-10T07:10:13.534751Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-10T07:10:13.534773Z",
"modified": "2023-07-10T07:10:13.541387Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1078,
"topic": "gcn.circular",
"uuid": "3481a8b1-30f6-4a63-a7fb-6b3754f8244a",
"title": "LIGO/Virgo/KAGRA S230708cf: Updated Sky localization",
"submitter": "Hop gcn.circular",
"authors": "jgolomb@caltech.edu",
"data": {
"date": "23/07/10 07:10:11 GMT",
"from": "jgolomb@caltech.edu",
"title": "GCN CIRCULAR",
"number": "34190",
"subject": "LIGO/Virgo/KAGRA S230708cf: Updated Sky localization"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:\n\nWe have conducted further analysis of the LIGO Hanford Observatory (H1) and LIGO Livingston Observatory (L1) data around the time of the compact binary merger (CBC) candidate S230708cf (GCN Circular 34173). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.multiorder.fits,0, distributed via GCN Notice, is available for retrieval from the GraceDB event page:\n\nhttps://gracedb.ligo.org/superevents/S230708cf\n\nFor the Bilby.multiorder.fits,0 sky map, the 90% credible region is 2032 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 3336 +/- 1076 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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4OTczMDE2LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.jyGY_LynbbB7bdcVPUdzB-M2uk9jCXSlCVmIZGrZbvE\n\n",
"published": "2023-07-10T07:10:21.573332Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-10T07:10:21.573352Z",
"modified": "2023-07-10T07:10:21.597103Z",
"nonlocalizedevents": [
{
"event_id": "S230708c"
}
],
"targets": []
},
{
"id": 1079,
"topic": "gcn.circular",
"uuid": "553538d9-0339-4d76-8483-3167e4e3d337",
"title": "GRB 230709C: AstroSat CZTI detection",
"submitter": "Hop gcn.circular",
"authors": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"data": {
"date": "23/07/10 09:12:13 GMT",
"from": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"title": "GCN CIRCULAR",
"number": "34191",
"subject": "GRB 230709C: AstroSat CZTI detection"
},
"message_text": "P K. Navaneeth (IUCAA), G. Waratkar (IITB), A. Vibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (Ashoka University/IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:\n\nAnalysis of AstroSat CZTI data with the CIFT framework (Sharma et al., 2021, JApA, 42, 73) showed the detection of a short GRB 230709C which was also detected by Fermi-GBM (Trig. 710617111; Preis et al., GCN Circ. 34187).\n\nThe source was clearly detected in the 20-200 keV energy range. The light curve peaks at 2023-07-09 17:38:26.94 UTC. The measured peak count rate associated with the burst is 3742 (+1196, -481) counts/s above the background in the combined data of all quadrants, with a total of 280 (+65, -56) counts. The local mean background count rate was 337 (+34, -54) counts/s. Using cumulative rates, we measure a T90 of 0.33 (+0.30, -0.03) s. We caution that there was a 0.3 s readout dead time in CZTI before the detection of the burst. Hence, the T90 can be as large as 0.63 s for this GRB, with a lower limit of 0.30 s as estimated above by cumulative rates.\n\nThe source was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range.\n\nCZTI is built by a TIFR-led consortium of institutes across India, including VSSC, URSC, IUCAA, SAC, and PRL. The Indian Space Research Organisation funded, managed, and facilitated the project.\n\nCZTI GRB detections are reported regularly on the payload site at:\nhttp://astrosat.iucaa.in/czti/?q=grb\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4OTgwMzM5LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.Ctoc4o2HxSEpYMYWAxzuct1Tv6j-keirpnZ3tGawnM4\n\n",
"published": "2023-07-10T09:12:24.628592Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-10T09:12:24.628615Z",
"modified": "2023-07-10T09:12:24.636698Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1080,
"topic": "igwn.gwalert",
"uuid": "f54c49d0-7565-4767-8db7-8ffe15b9c19b",
"title": "S230710h - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230710h/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230710h/view/"
},
"event": {
"far": 1.895703098853119e-05,
"time": "2023-07-10T11:32:27.246Z",
"group": "CBC",
"search": "AllSky",
"area_50": 2237.556858132971,
"area_90": 11431.179447776094,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.45594227994228,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "fbf881f8d99dd131b05dbdd747223ba6",
"classification": {
"BBH": 0.0,
"BNS": 0.09038012893713988,
"NSBH": 0.0,
"Terrestrial": 0.9096198710628601
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-07-10T11:32:53Z",
"superevent_id": "S230710h",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-10T11:32:54.481266Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-10T11:32:54.481293Z",
"modified": "2023-07-10T11:32:54.492201Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1081,
"topic": "igwn.gwalert",
"uuid": "4f7d2940-1396-45bf-b682-339f74c82460",
"title": "S230710h - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230710h/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230710h/view/"
},
"event": {
"far": 1.895703098853119e-05,
"time": "2023-07-10T11:32:27.246Z",
"group": "CBC",
"search": "AllSky",
"area_50": 2237.556858132971,
"area_90": 11431.179447776094,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.45594227994228,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "fbf881f8d99dd131b05dbdd747223ba6",
"classification": {
"BBH": 0.0,
"BNS": 0.09038012893713988,
"NSBH": 0.0,
"Terrestrial": 0.9096198710628601
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-07-10T11:37:28Z",
"superevent_id": "S230710h",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-10T11:37:29.287518Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-10T11:37:29.287547Z",
"modified": "2023-07-10T11:37:29.294330Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1082,
"topic": "gcn.circular",
"uuid": "d668352a-8f92-43be-9650-e9257cfbf699",
"title": "Swift Trigger 1178410 is not an astrophysical event",
"submitter": "Hop gcn.circular",
"authors": "Amy <yarleen@gmail.com>",
"data": {
"date": "23/07/10 12:38:15 GMT",
"from": "Amy <yarleen@gmail.com>",
"title": "GCN CIRCULAR",
"number": "34192",
"subject": "Swift Trigger 1178410 is not an astrophysical event"
},
"message_text": "A. Y. Lien (U Tampa), C. Gronwall (PSU),\nK. L. Page (U Leicester), and Aaron Tohuvavohu (U Toronto)\nreport on behalf of the Neil Gehrels Swift Observatory team:\n\nUsing the full data set from recent downlinks, we report further\nground data analysis for Swift trigger 1178410\n(Lien, et al., GCN Circ. 34174).\n\nThe BAT analysis uses data from T-60 to T+240 sec. The BAT image\nsignificance is 2.7 sigma (15-350 keV). Also, the mask-weighted\nlight curve does not show anything significant. In addition,\nno source was detected in XRT or UVOT.\n\nWe therefore conclude that this event is due to noise and is not\nan astrophysical event.\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4OTkyNzAxLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.1RphqOWNsWqgiVNXYMQ7YxCdWbIJXe4GlNX9oKVCCAg\n\n",
"published": "2023-07-10T12:38:26.276836Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-10T12:38:26.276857Z",
"modified": "2023-07-10T12:38:26.285399Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1083,
"topic": "igwn.gwalert",
"uuid": "2b0b7863-183e-4d8e-be60-4295a0ec781b",
"title": "S230710p - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230710p/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230710p/view/"
},
"event": {
"far": 1.41434e-05,
"time": "2023-07-10T13:54:09.512Z",
"group": "Burst",
"search": "BBH",
"area_50": 3832.2147840341877,
"area_90": 12207.526069596424,
"duration": 0.079333,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "260316f906d1eef6c5b988e3c276b210",
"classification": {},
"skymap_version": 0,
"central_frequency": 24.448917
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-07-10T13:55:23Z",
"superevent_id": "S230710p",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-10T13:55:24.675833Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-10T13:55:24.675863Z",
"modified": "2023-07-10T13:55:24.687237Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1084,
"topic": "igwn.gwalert",
"uuid": "e0942ee0-ab79-45c4-9daf-36b18e4302c1",
"title": "S230710p - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230710p/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230710p/view/"
},
"event": {
"far": 1.41434e-05,
"time": "2023-07-10T13:54:09.512Z",
"group": "Burst",
"search": "BBH",
"area_50": 3832.2147840341877,
"area_90": 12207.526069596424,
"duration": 0.079333,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "260316f906d1eef6c5b988e3c276b210",
"classification": {},
"skymap_version": 0,
"central_frequency": 24.448917
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-07-10T13:59:56Z",
"superevent_id": "S230710p",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-10T13:59:58.210191Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-10T13:59:58.210217Z",
"modified": "2023-07-10T13:59:58.217032Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1085,
"topic": "gcn.circular",
"uuid": "d52599f5-064f-4d36-b98a-c495cc5d1706",
"title": "IceCube-230707A: No candidates detected by Swift-XRT",
"submitter": "Hop gcn.circular",
"authors": "P.A. Evans at U. Leicester <pae9@leicester.ac.uk>",
"data": {
"date": "23/07/10 14:17:35 GMT",
"from": "P.A. Evans at U. Leicester <pae9@leicester.ac.uk>",
"title": "GCN CIRCULAR",
"number": "34193",
"subject": "IceCube-230707A: No candidates detected by Swift-XRT"
},
"message_text": "P.A. Evans (U. Leicester) and J.A. Kennea (PSU) report,\n\nSwift-XRT carried out 13 observations of the region of IceCube-230707A (Lincetto et al., GCN Circ 34163), from 59 ks to 78 ks after the neutrino trigger; the typical exposure time was 300 s per field.\n\nWe detected three uncatalogued X-ray objects, however all of these are classified as âpoorâ by the source detection algorithm (Evans et al., 2020) and are thus likely spurious. The typical 3-sigma upper limit is 0.05 ct/sec (0.3-10 keV) corresponding to ~2.1 x 10^-12 erg/cm^2/s.\n\nThe full results of the automated XRT analysis can be viewed online at: https://www.swift.ac.uk/neutrino/NEUTRINO_FIELD00040/\n\n\n(Reference: Evans et al., 2020, ApJS, 247, 54)\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4OTk4NjYxLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.R350ptzBqxsX20K_T4bdTujm-nFaNg5HGE9a0FCtUsw\n\n",
"published": "2023-07-10T14:17:47.063168Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-10T14:17:47.063193Z",
"modified": "2023-07-10T14:17:47.078874Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1086,
"topic": "igwn.gwalert",
"uuid": "5c9b7827-7fce-4223-9c29-ebfb4400b4ae",
"title": "S230710v - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230710v/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230710v/view/"
},
"event": {
"far": 1.291174703510478e-05,
"time": "2023-07-10T15:04:04.218Z",
"group": "CBC",
"search": "AllSky",
"area_50": 4194.789638765413,
"area_90": 15510.146563502365,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.027043668502428234,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "671aed790f3fad05e9dc5f8a56527a65",
"classification": {
"BBH": 0.0,
"BNS": 0.09366603724559686,
"NSBH": 0.006788931712403156,
"Terrestrial": 0.899545031042
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-07-10T15:09:30Z",
"superevent_id": "S230710v",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-10T15:09:31.862638Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-10T15:09:31.862665Z",
"modified": "2023-07-10T15:09:31.871721Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1087,
"topic": "igwn.gwalert",
"uuid": "3e83794d-8b65-417f-b8e3-9104eb8666bc",
"title": "S230710v - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230710v/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230710v/view/"
},
"event": {
"far": 1.291174703510478e-05,
"time": "2023-07-10T15:04:04.218Z",
"group": "CBC",
"search": "AllSky",
"area_50": 4194.789638765413,
"area_90": 15510.146563502365,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.027043668502428234,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "671aed790f3fad05e9dc5f8a56527a65",
"classification": {
"BBH": 0.0,
"BNS": 0.09366603724559686,
"NSBH": 0.006788931712403156,
"Terrestrial": 0.899545031042
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-07-10T15:14:04Z",
"superevent_id": "S230710v",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-10T15:14:06.561336Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-10T15:14:06.561365Z",
"modified": "2023-07-10T15:14:06.568401Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1088,
"topic": "igwn.gwalert",
"uuid": "b5330c18-d5ca-44f4-9030-84aba8d7bd65",
"title": "S230708t - INITIAL",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230708t/files/bayestar.multiorder.fits,1",
"gracedb": "https://gracedb.ligo.org/superevents/S230708t/view/"
},
"event": {
"far": 4.330931776818548e-08,
"time": "2023-07-08T05:37:05.120Z",
"group": "CBC",
"search": "AllSky",
"area_50": 456.5757429948749,
"area_90": 2291.271651426486,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.004106583072100313,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "dfa09f0817ac0ad0cbae9c4b4281cbdf",
"classification": {
"BBH": 0.9727404962904896,
"BNS": 1.1673107552317844e-17,
"NSBH": 8.439042046204218e-16,
"Terrestrial": 0.02725950370950947
},
"skymap_version": 1,
"central_frequency": null
},
"alert_type": "INITIAL",
"sequence_num": 4,
"time_created": "2023-07-10T15:20:46Z",
"superevent_id": "S230708t",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-10T15:20:47.749784Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-10T15:20:47.749811Z",
"modified": "2023-07-10T15:20:47.756589Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1089,
"topic": "gcn.circular",
"uuid": "a218fbfd-720f-465d-8056-8811ef8d0330",
"title": "LIGO/Virgo/KAGRA S230708t: Identification of a GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "adrian.helmling-cornell@ligo.org",
"data": {
"date": "23/07/10 15:31:18 GMT",
"from": "adrian.helmling-cornell@ligo.org",
"title": "GCN CIRCULAR",
"number": "34194",
"subject": "LIGO/Virgo/KAGRA S230708t: 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 S230708t during\nreal-time processing of data from LIGO Hanford Observatory (H1) and\nLIGO Livingston Observatory (L1) at 2023-07-08 05:37:05.120 UTC (GPS\ntime: 1372829843.120). The candidate was found by the MBTA [1] and\nGstLAL [2] analysis pipelines.\n\nS230708t is an event of interest because its false alarm rate, as\nestimated by the online analysis, is 4.3e-08 Hz, or about one in 8\nmonths. The event's properties can be found at this URL:\n\nhttps://gracedb.ligo.org/superevents/S230708t\n\nThe classification of the GW signal, in order of descending\nprobability, is BBH (97%), Terrestrial (3%), NSBH (<1%), or BNS (<1%).\n\nThere was a high rate of noise transients (glitches) in the LIGO Hanford\ndetector which may affect the parameters or the significance of\nthe candidate.\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%. [3] Using the masses and spins inferred from the\nsignal, the probability of matter outside the final compact object\n(HasRemnant) is <1%. [3] 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\nThree sky maps are available at this time and can be retrieved from\nthe GraceDB event page:\n * bayestar.multiorder.fits,0, an initial localization generated by\nBAYESTAR [4], distributed via GCN notice about 27 seconds after the\ncandidate event time.\n * bayestar.multiorder.fits,1, an initial localization generated by\nBAYESTAR [4], distributed via GCN notice about 36 seconds after the\ncandidate event time.\n * bayestar.multiorder.fits,2, an initial localization generated by\nBAYESTAR [4], 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\n2292 deg2. Marginalized over the whole sky, the a posteriori\nluminosity distance estimate is 3372 +/- 1101 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] Aubin et al. CQG 38, 095004 (2021)\n [2] Tsukada et al. arXiv:2305.06286 (2023) and Ewing et al.\narXiv:2305.05625 (2023)\n [3] Chatterjee et al. ApJ 896, 54 (2020)\n [4] Singer & Price PRD 93, 024013 (2016)\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg5MDAzMDgzLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.emq6L_m1rEXKKHloIcQHNnlbFCBE0BFap_Row-Z6TYQ\n\n",
"published": "2023-07-10T15:31:32.237757Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-10T15:31:32.237778Z",
"modified": "2023-07-10T15:31:32.246770Z",
"nonlocalizedevents": [
{
"event_id": "S230708t"
}
],
"targets": []
},
{
"id": 1090,
"topic": "igwn.gwalert",
"uuid": "ff7f98cb-0c46-412d-a310-7d5d317ccd56",
"title": "S230708z - INITIAL",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230708z/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230708z/view/"
},
"event": {
"far": 7.026288032270329e-08,
"time": "2023-07-08T07:18:59.444Z",
"group": "CBC",
"search": "AllSky",
"area_50": 852.7223435345458,
"area_90": 3111.2615427977958,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.004106583072100313,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "7567ca3f277bfab8f5a5c8a54b72f96b",
"classification": {
"BBH": 0.953955431911343,
"BNS": 4.464246794331243e-16,
"NSBH": 3.254796044004244e-14,
"Terrestrial": 0.046044568088624005
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "INITIAL",
"sequence_num": 3,
"time_created": "2023-07-10T15:50:56Z",
"superevent_id": "S230708z",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-10T15:50:57.260410Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-10T15:50:57.260445Z",
"modified": "2023-07-10T15:50:57.267908Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1091,
"topic": "gcn.circular",
"uuid": "2451c561-4d9a-4bb9-a22e-ce8920f2a436",
"title": "LIGO/Virgo/KAGRA S230708z: Identification of a GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "adrian.helmling-cornell@ligo.org",
"data": {
"date": "23/07/10 15:58:45 GMT",
"from": "adrian.helmling-cornell@ligo.org",
"title": "GCN CIRCULAR",
"number": "34195",
"subject": "LIGO/Virgo/KAGRA S230708z: 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 S230708z during\nreal-time processing of data from LIGO Hanford Observatory (H1) and\nLIGO Livingston Observatory (L1) at 2023-07-08 07:18:59.444 UTC (GPS\ntime: 1372835957.444). The candidate was found by the CWB [1], MBTA\n[2], and GstLAL [3] analysis pipelines.\n\nS230708z is an event of interest because its false alarm rate, as\nestimated by the online analysis, is 7e-08 Hz, or about one in 5\nmonths. The event's properties can be found at this URL:\n\nhttps://gracedb.ligo.org/superevents/S230708z\n\nThe classification of the GW signal, in order of descending\nprobability, is BBH (95%), Terrestrial (5%), NSBH (<1%), or BNS (<1%).\n\nThere was a high rate of noise transients (glitches) in the LIGO\nLivingston detector which may affect the parameters or the significance\nof the candidate.\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%. [4] Using the masses and spins inferred from the\nsignal, the probability of matter outside the final compact object\n(HasRemnant) is <1%. [4] 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,0, an initial localization generated by\nBAYESTAR [5], distributed via GCN notice about 24 seconds after the\ncandidate event time.\n * bayestar.multiorder.fits,1, an initial localization generated by\nBAYESTAR [5], distributed via GCN notice about 5 minutes after the\ncandidate event time.\n\nThe preferred sky map at this time is bayestar.multiorder.fits,1. For\nthe bayestar.multiorder.fits,1 sky map, the 90% credible region is\n3111 deg2. Marginalized over the whole sky, the a posteriori\nluminosity distance estimate is 5796 +/- 1854 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] Aubin et al. CQG 38, 095004 (2021)\n [3] Tsukada et al. arXiv:2305.06286 (2023) and Ewing et al.\narXiv:2305.05625 (2023)\n [4] Chatterjee et al. ApJ 896, 54 (2020)\n [5] Singer & Price PRD 93, 024013 (2016)\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg5MDA0NzMxLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.Cc9dio8XBQrdmSu0MapY-JSEWz4D5M_iHKq-QimEMsA\n\n",
"published": "2023-07-10T15:58:56.332248Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-10T15:58:56.332268Z",
"modified": "2023-07-10T15:58:56.340427Z",
"nonlocalizedevents": [
{
"event_id": "S230708z"
}
],
"targets": []
},
{
"id": 1092,
"topic": "igwn.gwalert",
"uuid": "ea2e52c6-6069-4c1b-9bfe-211b8b9b6d39",
"title": "S230710ab - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230710ab/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230710ab/view/"
},
"event": {
"far": 6.80679e-06,
"time": "2023-07-10T18:17:57.140Z",
"group": "Burst",
"search": "BBH",
"area_50": 4326.558741063566,
"area_90": 13661.182663102165,
"duration": 0.030382,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "9887aab9e3c2287465482f4bbbbde05c",
"classification": {},
"skymap_version": 0,
"central_frequency": 23.357212
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-07-10T18:19:11Z",
"superevent_id": "S230710ab",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-10T18:19:12.606662Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-10T18:19:12.606691Z",
"modified": "2023-07-10T18:19:12.614252Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1093,
"topic": "igwn.gwalert",
"uuid": "86469106-fc0d-4cdd-9908-be29cb24ca28",
"title": "S230710ac - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230710ac/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230710ac/view/"
},
"event": {
"far": 1.37313e-05,
"time": "2023-07-10T18:17:56.251Z",
"group": "Burst",
"search": "AllSky",
"area_50": 855.0304010588762,
"area_90": 4837.268924174561,
"duration": 0.0201,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "2eeac19ac6142f638fb54b8083dbce06",
"classification": {},
"skymap_version": 0,
"central_frequency": 607.877991
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-07-10T18:20:37Z",
"superevent_id": "S230710ac",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-10T18:20:38.834333Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-10T18:20:38.834359Z",
"modified": "2023-07-10T18:20:38.841183Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1094,
"topic": "igwn.gwalert",
"uuid": "daa19b1d-9795-48be-8938-9174177446a9",
"title": "S230710ab - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230710ab/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230710ab/view/"
},
"event": {
"far": 6.80679e-06,
"time": "2023-07-10T18:17:57.140Z",
"group": "Burst",
"search": "BBH",
"area_50": 4326.558741063566,
"area_90": 13661.182663102165,
"duration": 0.030382,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "9887aab9e3c2287465482f4bbbbde05c",
"classification": {},
"skymap_version": 0,
"central_frequency": 23.357212
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-07-10T18:23:45Z",
"superevent_id": "S230710ab",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-10T18:23:47.401344Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-10T18:23:47.401371Z",
"modified": "2023-07-10T18:23:47.407945Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1095,
"topic": "igwn.gwalert",
"uuid": "46716df9-a99b-4a6d-881d-92d256e6deec",
"title": "S230710ac - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230710ac/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230710ac/view/"
},
"event": {
"far": 1.37313e-05,
"time": "2023-07-10T18:17:56.251Z",
"group": "Burst",
"search": "AllSky",
"area_50": 855.0304010588762,
"area_90": 4837.268924174561,
"duration": 0.0201,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "2eeac19ac6142f638fb54b8083dbce06",
"classification": {},
"skymap_version": 0,
"central_frequency": 607.877991
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-07-10T18:25:12Z",
"superevent_id": "S230710ac",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-10T18:25:13.639781Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-10T18:25:13.639808Z",
"modified": "2023-07-10T18:25:13.647034Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1096,
"topic": "igwn.gwalert",
"uuid": "99f87ca2-697a-4485-b44e-d3386275a100",
"title": "S230710ad - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230710ad/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230710ad/view/"
},
"event": {
"far": 4.2682e-06,
"time": "2023-07-10T18:32:51.194Z",
"group": "Burst",
"search": "BBH",
"area_50": 1087.7245641936722,
"area_90": 3270.7273353879177,
"duration": 0.024002,
"pipeline": "CWB",
"properties": {},
"instruments": [
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"L1"
],
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"skymap_hash": "2a23cad7818ee8431dacc50d107920a0",
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},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-07-10T18:34:41Z",
"superevent_id": "S230710ad",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-10T18:34:42.012358Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-10T18:34:42.012385Z",
"modified": "2023-07-10T18:34:42.021746Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1097,
"topic": "igwn.gwalert",
"uuid": "dd6d1383-efc8-4aa8-bf74-722e1420a230",
"title": "S230710ad - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230710ad/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230710ad/view/"
},
"event": {
"far": 4.2682e-06,
"time": "2023-07-10T18:32:51.194Z",
"group": "Burst",
"search": "BBH",
"area_50": 1087.7245641936722,
"area_90": 3270.7273353879177,
"duration": 0.024002,
"pipeline": "CWB",
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},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-07-10T18:39:42Z",
"superevent_id": "S230710ad",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-10T18:39:42.918347Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-10T18:39:42.918374Z",
"modified": "2023-07-10T18:39:42.925582Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1098,
"topic": "igwn.gwalert",
"uuid": "529bf0b6-2024-4a1b-88be-033ffa226928",
"title": "S230710ah - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230710ah/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230710ah/view/"
},
"event": {
"far": 1.76159e-06,
"time": "2023-07-10T18:53:43.686Z",
"group": "Burst",
"search": "BBH",
"area_50": 4189.753876894145,
"area_90": 12378.741973219501,
"duration": 0.016131,
"pipeline": "CWB",
"properties": {},
"instruments": [
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],
"significant": false,
"skymap_hash": "fce2ed4f2a7fe8ed8d5f135442b2ea72",
"classification": {},
"skymap_version": 0,
"central_frequency": 39.550259
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-07-10T18:55:40Z",
"superevent_id": "S230710ah",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-10T18:55:41.213443Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-10T18:55:41.213470Z",
"modified": "2023-07-10T18:55:41.220474Z",
"nonlocalizedevents": [],
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},
{
"id": 1099,
"topic": "igwn.gwalert",
"uuid": "0d04212f-2b68-4075-a2ac-5eb66a3adf5f",
"title": "S230710ah - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230710ah/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230710ah/view/"
},
"event": {
"far": 1.76159e-06,
"time": "2023-07-10T18:53:43.686Z",
"group": "Burst",
"search": "BBH",
"area_50": 4189.753876894145,
"area_90": 12378.741973219501,
"duration": 0.016131,
"pipeline": "CWB",
"properties": {},
"instruments": [
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"significant": false,
"skymap_hash": "fce2ed4f2a7fe8ed8d5f135442b2ea72",
"classification": {},
"skymap_version": 0,
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},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-07-10T19:00:15Z",
"superevent_id": "S230710ah",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-10T19:00:16.994059Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-10T19:00:16.994093Z",
"modified": "2023-07-10T19:00:17.001974Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1100,
"topic": "gcn.circular",
"uuid": "a33b2fb2-96a8-4feb-a404-9d3ea915aacf",
"title": "GRB 230710A: Fermi GBM Final Real-time Localization",
"submitter": "Hop gcn.circular",
"authors": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"data": {
"date": "23/07/10 20:00:34 GMT",
"from": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"title": "GCN CIRCULAR",
"number": "34196",
"subject": "GRB 230710A: Fermi GBM Final Real-time Localization"
},
"message_text": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 19:50:00 UT on 10 Jul 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230710A (trigger 710711405.793774 / 230710826).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 26.3, Dec = -17.4 (J2000 degrees, equivalent to J2000 01h 45m, -17d 23'), with a statistical uncertainty of 4.8 degrees.\n\nThe angle from the Fermi LAT boresight is 15.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230710826/quicklook/glg_skymap_all_bn230710826.png\n\nThe HEALPix FITS file, including the estimated localization systematic, can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230710826/quicklook/glg_healpix_all_bn230710826.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230710826/quicklook/glg_lc_medres34_bn230710826.gif\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg5MDE5MjQwLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.w9ZoHBDiGYzKYqIFe5y4a5rf3k9zgEMzBoMAaaBGAhM\n\n",
"published": "2023-07-10T20:00:45.717498Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-10T20:00:45.717518Z",
"modified": "2023-07-10T20:00:45.726536Z",
"nonlocalizedevents": [],
"targets": []
}
]
}
