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"results": [
{
"id": 2705,
"topic": "gcn.circular",
"uuid": "be289c11-a388-495e-af21-87fc21ef512d",
"title": "LIGO/Virgo/KAGRA S230904n: 1 counterpart neutrino candidate from IceCube neutrino searches",
"submitter": "Hop gcn.circular",
"authors": "Jessie Thwaites at IceCube/U Wisc-Madison <thwaites@wisc.edu>",
"data": {
"date": "23/09/04 14:46:43 GMT",
"from": "Jessie Thwaites at IceCube/U Wisc-Madison <thwaites@wisc.edu>",
"title": "GCN CIRCULAR",
"number": "34616",
"subject": "LIGO/Virgo/KAGRA S230904n: 1 counterpart neutrino candidate from IceCube neutrino searches"
},
"message_text": "IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nSearches for track-like muon neutrino events detected by IceCube consistent with the sky localization of gravitational-wave candidate S230904n in a time range of 1000 seconds centered on the alert event time (2023-09-04 05:01:53.000 UTC to 2023-09-04 05:18:33.000 UTC) have been performed [1,2]. During this time period IceCube was collecting good quality data. Two hypothesis tests were conducted. The first search is a maximum likelihood analysis which searches for a generic point-like neutrino source coincident with the given GW skymap. The second uses a Bayesian approach to quantify the joint GW + neutrino event significance, which assumes a binary merger scenario and accounts for known astrophysical priors, such as GW source distance, in the significance estimate [3].\n\nOne track-like event is found in spatial and temporal coincidence with the gravitational-wave candidate S230904n calculated from the map circulated in the 3-Initial notice. This represents an overall p-value of 12% from the generic transient search and an overall p-value of 0.4% for the Bayesian search. These p-values measure the consistency of the observed track-like events with the known atmospheric backgrounds for this single map (not trials corrected for multiple GW events). The most probable multi-messenger source direction based on the neutrinos and GW skymap is RA 348.40, Dec 37.26 degrees.\n\nThe reported p-values can differ due to the estimated distance of the GW candidate. The distance is used as a prior in the Bayesian binary merger search, while it is not taken into account in the generic transient point-like source search. The false alarm rate of these coincidences can be obtained by multiplying the p-values with their corresponding GW trigger rates. Further details are available at https://gcn.nasa.gov/missions/icecube.\n\nProperties of the coincident events are shown below.\n\ndt(s) \tRA(deg) \tDec(deg) \tAngular uncertainty(deg) \tp-value (generic transient) \tp-value (Bayesian)\n----------------------------------------------------------------------------------------------------------------------------------------------------\n263 \t348.89 \t \t36.55 \t \t3.16 \t \t \t \t \t \t0.1625 \t \t \t \t \t \t \t0.0037\n\nwhere:\ndt = Time of track event minus time of GW trigger (sec)\nAngular uncertainty = Angular uncertainty of track event: the radius of a circle representing 90% CL containment by area.\np-value = the p-value for this specific track event from each search.\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] M. G. Aartsen et al 2020 ApJL 898 L10\n[2] Abbasi et al. Astrophys.J. 944 (2023) 1, 80\n[3] I. Bartos et al. 2019 Phys. Rev. D 100, 083017\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkzODM4ODA4LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.AvtjWifN5G7PMPcOPa8zooMXTgcn2LPpp5Kse5xfpCE\n\n",
"published": "2023-09-04T14:46:57.906864Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-09-04T14:46:57.906883Z",
"modified": "2023-09-04T14:46:57.911452Z",
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{
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{
"id": 2706,
"topic": "igwn.gwalert",
"uuid": "c2a31d10-6463-40a2-8aff-86afc6c38b2f",
"title": "S230904ao - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
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"time": "2023-09-04T15:25:45.240Z",
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"area_50": 437.06216574371524,
"area_90": 1651.7298937755766,
"duration": null,
"pipeline": "pycbc",
"properties": {
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"HasMassGap": 0.16774916813302032,
"HasRemnant": 0.02245944071821854
},
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"significant": false,
"skymap_hash": "7a3a71c56ba97dba26f8fb7899e4ae1d",
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"BNS": 0.0018667151885578108,
"NSBH": 0.08124389026873804,
"Terrestrial": 0.9168893945427041
},
"skymap_version": 0,
"central_frequency": null
},
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"sequence_num": 1,
"time_created": "2023-09-04T15:26:11Z",
"superevent_id": "S230904ao",
"external_coinc": null
},
"message_text": "",
"published": "2023-09-04T15:26:12.129337Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-09-04T15:26:12.129356Z",
"modified": "2023-09-04T15:26:12.133034Z",
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{
"id": 2707,
"topic": "igwn.gwalert",
"uuid": "1454f10b-b22f-4e7e-bce9-6ba051646dbb",
"title": "S230904ao - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"gracedb": "https://gracedb.ligo.org/superevents/S230904ao/view/"
},
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"time": "2023-09-04T15:25:45.220Z",
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"area_50": 459.8280058700681,
"area_90": 1733.14137736106,
"duration": null,
"pipeline": "MBTA",
"properties": {
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"sequence_num": 2,
"time_created": "2023-09-04T15:30:46Z",
"superevent_id": "S230904ao",
"external_coinc": null
},
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"published": "2023-09-04T15:30:46.753781Z",
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"retracted": false,
"created": "2023-09-04T15:30:46.753799Z",
"modified": "2023-09-04T15:30:46.757391Z",
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{
"id": 4250,
"topic": "igwn.gwalert",
"uuid": "5b2f1c70-ce50-4655-9b2c-c127293de386",
"title": "S231028ay - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"time": "2023-10-28T14:18:01.262Z",
"group": "Burst",
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"time_created": "2023-10-28T14:24:05Z",
"superevent_id": "S231028ay",
"external_coinc": null
},
"message_text": "",
"published": "2023-10-31T23:28:01.256537Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-10-31T23:28:01.256560Z",
"modified": "2023-10-31T23:28:01.262613Z",
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},
{
"id": 11766,
"topic": "lvk-users.beccatest",
"uuid": "0881b16d-0e33-4d5e-9b96-7263eea54364",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"L1"
],
"time": [
1400629900
],
"range": 158.81243694215587
},
"message_text": "",
"published": "2024-05-24T23:51:40.730628Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-24T23:51:40.730661Z",
"modified": "2024-05-24T23:51:40.730668Z",
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},
{
"id": 11767,
"topic": "lvk-users.beccatest",
"uuid": "dd915820-38a4-4c7f-886f-087753f32dce",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"V1"
],
"time": [
1400629900
],
"range": 53.1882950347489
},
"message_text": "",
"published": "2024-05-24T23:51:46.753569Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-24T23:51:46.753590Z",
"modified": "2024-05-24T23:51:46.753600Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 11768,
"topic": "lvk-users.beccatest",
"uuid": "5c438f2a-818f-4218-a74c-016ff85d9dd5",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"H1"
],
"time": [
1400630000
],
"range": 149.07159076020912
},
"message_text": "",
"published": "2024-05-24T23:53:17.908891Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-24T23:53:17.908905Z",
"modified": "2024-05-24T23:53:17.908910Z",
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},
{
"id": 2709,
"topic": "gcn.circular",
"uuid": "e4ec884d-965b-4a9d-9bd3-a8c286162555",
"title": "GRB 230903A: Fermi GBM detection",
"submitter": "Hop gcn.circular",
"authors": "Oliver J Roberts at USRA/NASA <oliver.roberts@nasa.gov>",
"data": {
"date": "23/09/04 16:40:58 GMT",
"from": "Oliver J Roberts at USRA/NASA <oliver.roberts@nasa.gov>",
"title": "GCN CIRCULAR",
"number": "34618",
"subject": "GRB 230903A: Fermi GBM detection"
},
"message_text": "O.J. Roberts (USRA), B. Mailyan (Florida Tech) and C. Meegan (UAH)\nreport on behalf of the Fermi GBM Team:\n\n\"At 17:22:58.81 UT on the 3rd September 2023 , the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 230903A (trigger 715454583 / 230903724) which was also detected\nby the Swift/BAT (A. D'ai et al. 2023, GCN 34610). The Fermi GBM Final Real-time Localization\n(GCN 34608) is consistent with the Swift position.\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 98 degrees.\n\nThe GBM light curve consists of one pulse\nwith a duration (T90) of about 3 s (50-300 keV).\nThe time-averaged spectrum from T0-4.0 s to T0+1.0 s is\nbest fit by a simple power law function with index -1.78 +/- 0.09.\n\nA power law function with an exponential high-energy cutoff fits\nthe spectrum equally well. The power law index is -1.27 +/- 0.33\nand the cutoff energy, parameterized as Epeak, is 95 +/- 31 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(5.87 +/- 0.85)E-07 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0-1s in the 10-1000 keV band\nis 2.0 +/- 0.2 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog:\nhttps://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html\n\nFor Fermi GBM data and info, please visit the official Fermi GBM Support Page:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkzODQ1NjYxLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.yxeGDx7YT77V-fjeZt2LxHtbhUYD_1t5l5vHxoBX3K4\n\n",
"published": "2023-09-04T16:41:06.156596Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-09-04T16:41:06.156612Z",
"modified": "2023-09-04T16:41:06.162229Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2710,
"topic": "igwn.gwalert",
"uuid": "7a37e6c0-3e1c-4077-9256-0e14a5a51574",
"title": "S230904at - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
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"gracedb": "https://gracedb.ligo.org/superevents/S230904at/view/"
},
"event": {
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"time": "2023-09-04T17:43:26.852Z",
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"area_50": 249.27021262771657,
"area_90": 861.1152799866574,
"duration": 0.054096,
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"sequence_num": 1,
"time_created": "2023-09-04T17:44:48Z",
"superevent_id": "S230904at",
"external_coinc": null
},
"message_text": "",
"published": "2023-09-04T17:44:48.902788Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-09-04T17:44:48.902806Z",
"modified": "2023-09-04T17:44:48.908618Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2711,
"topic": "igwn.gwalert",
"uuid": "7f0b2ed5-e499-4c78-a2e1-c5e8226ac6cc",
"title": "S230904at - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230904at/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230904at/view/"
},
"event": {
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"time": "2023-09-04T17:43:26.852Z",
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"area_90": 861.1152799866574,
"duration": 0.054096,
"pipeline": "CWB",
"properties": {},
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},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-09-04T17:49:22Z",
"superevent_id": "S230904at",
"external_coinc": null
},
"message_text": "",
"published": "2023-09-04T17:49:23.491669Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-09-04T17:49:23.491724Z",
"modified": "2023-09-04T17:49:23.495330Z",
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},
{
"id": 2712,
"topic": "igwn.gwalert",
"uuid": "f65e79d8-649c-44b9-85df-f34bc0ac6d44",
"title": "S230904av - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230904av/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230904av/view/"
},
"event": {
"far": 1.65075e-05,
"time": "2023-09-04T18:01:56.142Z",
"group": "Burst",
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"area_90": 240.03798253039375,
"duration": 0.010632,
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},
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"sequence_num": 1,
"time_created": "2023-09-04T18:03:20Z",
"superevent_id": "S230904av",
"external_coinc": null
},
"message_text": "",
"published": "2023-09-04T18:03:21.136044Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-09-04T18:03:21.136063Z",
"modified": "2023-09-04T18:03:21.140433Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2713,
"topic": "igwn.gwalert",
"uuid": "30bf588a-de44-4d8d-84d1-ecbe80181a43",
"title": "S230904av - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230904av/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230904av/view/"
},
"event": {
"far": 1.65075e-05,
"time": "2023-09-04T18:01:56.142Z",
"group": "Burst",
"search": "AllSky",
"area_50": 62.94702339083753,
"area_90": 240.03798253039375,
"duration": 0.010632,
"pipeline": "CWB",
"properties": {},
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"classification": {},
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},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-09-04T18:07:54Z",
"superevent_id": "S230904av",
"external_coinc": null
},
"message_text": "",
"published": "2023-09-04T18:07:54.739548Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-09-04T18:07:54.739566Z",
"modified": "2023-09-04T18:07:54.742861Z",
"nonlocalizedevents": [],
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},
{
"id": 2714,
"topic": "gcn.circular",
"uuid": "4c72ffcb-39cd-43f2-aad4-999c8b98290b",
"title": "Fermi GRB 230903A: 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": "23/09/04 19:31:00 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "34619",
"subject": "Fermi GRB 230903A: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko,\nG.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gress, N.M. Budnev, O.Ershova\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,\nA.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nV. Yurkov, A. Gabovich\n(Blagoveschensk Educational State University)\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB 230903A ( Fermi GBM team, GCN 34608) errorbox 49439 sec after notice time and 49475 sec after trigger time at 2023-09-04 07:07:34 UT, with upper limit up to 18.3 mag. The observations began at zenith distance = 24 deg. The sun altitude is -47.1 deg.\n\nMASTER-Amur robotic telescope located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the Fermi GRB 230903A errorbox 83217 sec after notice time and 83253 sec after trigger time at 2023-09-04 16:30:32 UT, with upper limit up to 16.5 mag. The observations began at zenith distance = 50 deg. The sun altitude is -31.3 deg.\n\nThe galactic latitude b = -76 deg., longitude l = 128 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"64968\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 49505 | 2023-09-04 07:07:34 | MASTER-OAFA | (23h 45m 07.73s , -21d 40m 56.2s) | C | 60 | 18.3 |\n 50337 | 2023-09-04 07:21:25 | MASTER-OAFA | (23h 45m 12.23s , -21d 40m 04.4s) | C | 60 | 18.3 |\n 83283 | 2023-09-04 16:30:32 | MASTER-Amur | (00h 45m 02.38s , +01d 03m 22.9s) | C | 60 | 16.4 |\n 83363 | 2023-09-04 16:31:51 | MASTER-Amur | (00h 52m 59.10s , +01d 05m 05.8s) | C | 60 | 16.5 |\n 83442 | 2023-09-04 16:33:11 | MASTER-Amur | (00h 44m 55.77s , +02d 58m 32.3s) | C | 60 | 16.5 |\n 83522 | 2023-09-04 16:34:30 | MASTER-Amur | (00h 52m 50.71s , +02d 58m 14.6s) | C | 60 | 16.2 |\n 83941 | 2023-09-04 16:41:29 | MASTER-Amur | (00h 44m 58.62s , +01d 04m 26.3s) | C | 60 | 16.2 |\n 84021 | 2023-09-04 16:42:49 | MASTER-Amur | (00h 52m 58.54s , +01d 03m 22.6s) | C | 60 | 16.2 |\n 84100 | 2023-09-04 16:44:08 | MASTER-Amur | (00h 44m 54.16s , +02d 58m 06.4s) | C | 60 | 16.2 |\n 84180 | 2023-09-04 16:45:28 | MASTER-Amur | (00h 52m 50.10s , +02d 57m 42.0s) | C | 60 | 15.9 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkzODU1ODY2LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.cvkM9dVa5BCjNf19VIODylamnSiia3tCZ9xLp_JIslI\n\n",
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"id": 9257,
"topic": "lvk-users.beccatest",
"uuid": "7a5290e3-ad0f-49d0-9f48-4f97c20e520b",
"title": "Generic Message",
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{
"id": 9258,
"topic": "lvk-users.beccatest",
"uuid": "bae8c122-2f31-4596-a091-8c7cb1161800",
"title": "Generic Message",
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1400512500
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{
"id": 9259,
"topic": "lvk-users.beccatest",
"uuid": "1edaef7b-db78-4670-add6-5a9186834dc5",
"title": "Generic Message",
"submitter": "",
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{
"id": 2721,
"topic": "gcn.circular",
"uuid": "84661667-b3fc-46e7-be2c-05f5af4de9fd",
"title": "GRB 230904C: Fermi GBM Final Localization",
"submitter": "Hop gcn.circular",
"authors": "Sarah Dalessi at UAH <sd0104@uah.edu>",
"data": {
"date": "23/09/04 23:32:23 GMT",
"from": "Sarah Dalessi at UAH <sd0104@uah.edu>",
"title": "GCN CIRCULAR",
"number": "34622",
"subject": "GRB 230904C: Fermi GBM Final Localization"
},
"message_text": "The Fermi GBM team reports the detection of a likely SHORT GRB\n\n\"At 20:28:02.19 UT on 04 September 2023, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 230904C (trigger 715552087/230904853).\n\nThe on-ground calculated location, using the Fermi GBM trigger data,\nis RA = 127.66, Dec = 55.24 (J2000 degrees, equivalent to J2000 12h 28m, +55d 24'),\nwith a statistical uncertainty of 3.92 degrees.\n\nThe angle from the Fermi LAT boresight is 29 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230904853/quicklook/glg_skymap_all_bn230904853.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/bn230904853/quicklook/glg_healpix_all_bn230904853.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230904853/quicklook/glg_lc_medres34_bn230904853.gif\"\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkzODcwMzQ1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.BTidTowsXAOtOjHWmBuPjPMITdgEWPLlF05fzIrrGKo\n\n",
"published": "2023-09-04T23:32:30.537197Z",
"message_parser": "GCN Circular Parser v1",
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"created": "2023-09-04T23:32:30.537213Z",
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"topic": "igwn.gwalert",
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"title": "S230904bt - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
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"id": 2723,
"topic": "igwn.gwalert",
"uuid": "357be1d0-eb15-452f-bac3-af8c6c7da773",
"title": "S230904bt - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"published": "2023-09-05T00:02:22.274213Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-09-05T00:02:22.274231Z",
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{
"id": 2724,
"topic": "gcn.circular",
"uuid": "dae74730-97be-433d-a75b-824aaaa39017",
"title": "GRB 230903A: Swift-BAT refined analysis",
"submitter": "Hop gcn.circular",
"authors": "Mike Moss at George Washington U <mikejmoss3@gmail.com>",
"data": {
"date": "23/09/05 04:07:26 GMT",
"from": "Mike Moss at George Washington U <mikejmoss3@gmail.com>",
"title": "GCN CIRCULAR",
"number": "34623",
"subject": "GRB 230903A: Swift-BAT refined analysis"
},
"message_text": "M. J. Moss (GSFC),\nS. D. Barthelmy (GSFC),\nA. D'Ai (INAF-IASFPA),\nH. A. Krimm (NSF),\nS. Laha (GSFC/UMBC),\nA. Y. Lien (U Tampa),\nC. B. Markwardt (GSFC),\nD. M. Palmer (LANL),\nT. Parsotan (GSFC/UMBC),\nT. Sakamoto (AGU),\nM. Stamatikos (OSU)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-239 to T+963 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 230903A (trigger #1189514)\n(D'Ai, et al., GCN Circ. 34610). The BAT ground-calculated position is\nRA, Dec = 9.898, -40.910 deg which is\n RA(J2000) = 00h 39m 35.5s\n Dec(J2000) = -40d 54' 34.5\"\nwith an uncertainty of 1.9 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 40%.\n\nThe mask weighted light curve shows a single short pulse. T90 (15-350 keV) is 2.54 +- 0.27 sec (estimated error including systematics).\nThe T90 and the spectral hardness of this burst places it on the border of the long-soft and hard-short burst classifications.\n\nThe time-averaged spectrum from T+0.20 to T+2.93 sec is best fit by a power law\nwith an exponential cutoff. This fit gives a photon index -0.66 +- 1.49,\nand Epeak of 63.4 +- 17.8 keV (chi squared 44.41 for 56 d.o.f.). For this\nmodel the total fluence in the 15-150 keV band is 2.2 +- 0.4 x 10^-07 erg/cm2\nand the 1-sec peak flux measured from T+0.50 sec in the 15-150 keV band is\n1.3 +- 0.3 ph/cm2/sec. A fit to a simple power law gives a photon index\nof 1.40 +- 0.21 (chi squared 54.66 for 57 d.o.f.). All the quoted errors\nare at the 90% confidence level.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/1189514/BA/\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkzODg2ODUyLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.IQ9mw4TXcO9b8urEVjir6-evRCs6wLTpKdoyfwxrEd4\n\n",
"published": "2023-09-05T04:07:41.811530Z",
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"created": "2023-09-05T04:07:41.811547Z",
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"topic": "igwn.gwalert",
"uuid": "7c023412-43b5-42f6-a5fc-5c9f8d84c0f7",
"title": "S230905r - PRELIMINARY",
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"event": {
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"time": "2023-10-30T15:42:23.137Z",
"group": "Burst",
"search": "BBH",
"area_50": 1678.587290422334,
"area_90": 6153.701006688277,
"duration": 0.051615,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "06975699117896dfbeaf4953d9048bf1",
"classification": {},
"skymap_version": 0,
"central_frequency": 32.197872
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-10-30T15:43:27Z",
"superevent_id": "S231030bi",
"external_coinc": null
},
"message_text": "",
"published": "2023-10-31T23:28:01.296460Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-10-31T23:28:01.296508Z",
"modified": "2023-10-31T23:28:01.301577Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2729,
"topic": "gcn.circular",
"uuid": "8a191437-75d8-4418-b9c6-899ab7e820ea",
"title": "GRB 230903A: VLT/X-shooter optical observations",
"submitter": "Hop gcn.circular",
"authors": "Emeric Le Floc'h at CEA-Saclay <emeric.lefloch@cea.fr>",
"data": {
"date": "23/09/05 10:07:06 GMT",
"from": "Emeric Le Floc'h at CEA-Saclay <emeric.lefloch@cea.fr>",
"title": "GCN CIRCULAR",
"number": "34624",
"subject": "GRB 230903A: VLT/X-shooter optical observations"
},
"message_text": "D. Pieterse (Radboud University), D. B. Malesani (Radboud and DAWN/NBI), E. Le Flocâh (CEA-Saclay), A. Saccardi (GEPI, Obs. de Paris) and N. R. Tanvir (Univ. of Leicester) report on behalf of the Stargate collaboration :\n\nWe observed the field of GRB230903A (Fermi GBM team, GCN 34608 ; DâAi et al., GCN 34610) using the ESO VLT UT3 (Melipal) equipped with the X-shooter instrument. Three 60s exposures were obtained in the r-band on 2023 September 4.097 UT (T-To ~8.95h). The observations were performed under poor weather conditions, with a seeing of 3.2 arcsec measured in the data. We do not detect any source coinciding with the location of the X-ray afterglow detected by Swift/XRT (DâAi et al., GCN 34610). We obtain the following upper limit, calibrated using a faint, nearby object from the Legacy Survey (Dey et al. 2019, ApJ, 257, 29).\n\nr > 22.7 mag (AB)\n\nThis estimate is not corrected for Galactic extinction and is consistent with the non-detection reported earlier by LCOGT (Strausbaugh et al., GCN 34611).\n\nWe acknowledge excellent support from the ESO observing staff in Paranal, in particular Claudia Paladini and Jonathan Smoker.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkzOTA4NDMxLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.51n4HuapJPDMXFf0xR_f1umqxZh06NHRQoU6fJSwAB4\n\n",
"published": "2023-09-05T10:07:20.418336Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-09-05T10:07:20.418353Z",
"modified": "2023-09-05T10:07:20.423802Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2730,
"topic": "gcn.circular",
"uuid": "5a668272-64e0-43e2-990d-bba144def253",
"title": "GRB 230903A: Enhanced Swift-XRT position",
"submitter": "Hop gcn.circular",
"authors": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"data": {
"date": "23/09/05 12:44:15 GMT",
"from": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"title": "GCN CIRCULAR",
"number": "34625",
"subject": "GRB 230903A: Enhanced Swift-XRT position"
},
"message_text": "A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester)\nreport on behalf of the Swift-XRT team.\n\nUsing 832 s of XRT Photon Counting mode data and 2 UVOT\nimages for GRB 230903A, we find an astrometrically corrected X-ray\nposition (using the XRT-UVOT alignment and matching UVOT field sources\nto the USNO-B1 catalogue): RA, Dec = 9.91061, -40.95001 which is equivalent\nto:\n\nRA (J2000): 00h 39m 38.55s\nDec (J2000): -40d 57' 00.0\"\n\nwith an uncertainty of 2.2 arcsec (radius, 90% confidence).\n\nThis position may be improved as more data are received. The latest\nposition can be viewed at http://www.swift.ac.uk/xrt_positions. Position\nenhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans\net al. (2009, MNRAS, 397, 1177).\n\nThis circular was automatically generated, and is an official product of the\nSwift-XRT team.\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkzOTE3ODYxLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.gNTTUyDfCh0t--YMVoktGaOzEzKDX23N_-yL3S5KDUU\n\n",
"published": "2023-09-05T12:44:26.179346Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-09-05T12:44:26.179391Z",
"modified": "2023-09-05T12:44:26.192449Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2733,
"topic": "gcn.circular",
"uuid": "99130560-ff48-48af-a0d1-d4a9f5c90a56",
"title": "LIGO/Virgo/KAGRA S230819ax: Correction to PROB_BBH and PROB_TERRES probabilities",
"submitter": "Hop gcn.circular",
"authors": "Anjali Yelikar at Rochester Institute of Technology <ay2016@g.rit.edu>",
"data": {
"date": "23/09/05 14:35:24 GMT",
"from": "Anjali Yelikar at Rochester Institute of Technology <ay2016@g.rit.edu>",
"title": "GCN CIRCULAR",
"number": "34627",
"subject": "LIGO/Virgo/KAGRA S230819ax: Correction to PROB_BBH and PROB_TERRES probabilities"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:\nThe trigger S230819ax had incorrect PROB_BBH and PROB_TERRES probabilities reported in the Update Circular number 34499. The correct values are 99% and 1% as reported in the Update Notice.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkzOTI0NTI5LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.BZEEb55FfIzXmyICIJc3GY0oAI56Gi58HDhN80_ohhk\n\n",
"published": "2023-09-05T14:35:34.956457Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-09-05T14:35:34.956493Z",
"modified": "2023-09-05T14:35:34.971961Z",
"nonlocalizedevents": [
{
"event_id": "S230819a"
}
],
"targets": []
},
{
"id": 6711,
"topic": "igwn.gwalert",
"uuid": "0d510e63-89e0-41f5-a49c-53bda9ae628b",
"title": "S240420o - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S240420o/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S240420o/view/"
},
"event": {
"far": 2.84391e-06,
"time": "2024-04-20T02:18:57.004Z",
"group": "CBC",
"search": "BBH",
"area_50": 1469.6031727647535,
"area_90": 4566.59672359396,
"duration": null,
"pipeline": "CWB",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.04264138160689884,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "10beac5cfbd4798376a7eab46192db4c",
"classification": {
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"BNS": 0.0,
"NSBH": 0.0,
"Terrestrial": 0.9918764122251285
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2024-04-20T02:25:33Z",
"superevent_id": "S240420o",
"external_coinc": null
},
"message_text": "",
"published": "2024-04-20T02:25:33.868461Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2024-04-20T02:25:33.868476Z",
"modified": "2024-04-20T02:25:33.874277Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2738,
"topic": "igwn.gwalert",
"uuid": "4e290180-dc57-4746-b8f8-5425efef5904",
"title": "S230906b - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230906b/files/bayestar.multiorder.fits,1",
"gracedb": "https://gracedb.ligo.org/superevents/S230906b/view/"
},
"event": {
"far": 1.331327729392539e-06,
"time": "2023-09-06T00:38:59.491Z",
"group": "CBC",
"search": "AllSky",
"area_50": 1038.835709360122,
"area_90": 3748.2854195130712,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.018157865123382366,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "f4e8e46ac59dce6e50ef333b3470e854",
"classification": {
"BBH": 0.5815363640030706,
"BNS": 1.0970742304320954e-13,
"NSBH": 1.3629276514077045e-11,
"Terrestrial": 0.41846363598319036
},
"skymap_version": 1,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-09-06T00:46:01Z",
"superevent_id": "S230906b",
"external_coinc": null
},
"message_text": "",
"published": "2023-09-06T00:46:02.660269Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-09-06T00:46:02.660289Z",
"modified": "2023-09-06T00:46:02.664095Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2739,
"topic": "igwn.gwalert",
"uuid": "80a8d565-6a3b-482f-94e3-25292fc5072f",
"title": "S230906m - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230906m/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230906m/view/"
},
"event": {
"far": 2.01284e-05,
"time": "2023-09-06T03:01:14.529Z",
"group": "Burst",
"search": "AllSky",
"area_50": 273.3999049275376,
"area_90": 1595.2873961351256,
"duration": 0.010604,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "3557e0993755ecc780facc2ea35b1de4",
"classification": {},
"skymap_version": 0,
"central_frequency": 1028.80249
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-09-06T03:03:41Z",
"superevent_id": "S230906m",
"external_coinc": null
},
"message_text": "",
"published": "2023-09-06T03:03:42.227400Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-09-06T03:03:42.227418Z",
"modified": "2023-09-06T03:03:42.232102Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9260,
"topic": "lvk-users.beccatest",
"uuid": "9d714c6c-cc20-441b-915e-e022ae9ae26a",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"H1"
],
"time": [
1400512600
],
"range": 151.50123734700162
},
"message_text": "",
"published": "2024-05-23T15:16:38.671549Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T15:16:38.671568Z",
"modified": "2024-05-23T15:16:38.671577Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2734,
"topic": "gcn.circular",
"uuid": "c7ba0529-6f9b-4275-990c-588e97a5e9d4",
"title": "GRB 230905A: 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": "23/09/05 15:55:23 GMT",
"from": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"title": "GCN CIRCULAR",
"number": "34628",
"subject": "GRB 230905A: Fermi GBM Final Real-time Localization"
},
"message_text": "The Fermi GBM team reports the detection of a likely SHORT GRB\n\nAt 15:44:59 UT on 5 Sep 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230905A (trigger 715621504.769918 / 230905656).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 154.8, Dec = -0.8 (J2000 degrees, equivalent to J2000 10h 19m, 0d 48'), with a statistical uncertainty of 14.4 degrees.\n\nThe angle from the Fermi LAT boresight is 64.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230905656/quicklook/glg_skymap_all_bn230905656.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/bn230905656/quicklook/glg_healpix_all_bn230905656.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230905656/quicklook/glg_lc_medres34_bn230905656.gif\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkzOTI5MzI5LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.tYQx5zMD-rUfyGFFK7p5cSXtvKJlBwpMk1Ok6cPCzEQ\n\n",
"published": "2023-09-05T15:55:40.667847Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-09-05T15:55:40.667876Z",
"modified": "2023-09-05T15:55:40.673376Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2735,
"topic": "igwn.gwalert",
"uuid": "b735f14e-394a-45f6-8047-89c55babeff6",
"title": "S230904n - UPDATE",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230904n/files/bayestar.multiorder.fits,2",
"gracedb": "https://gracedb.ligo.org/superevents/S230904n/view/"
},
"event": {
"far": 2.249226e-09,
"time": "2023-09-04T05:10:13.128Z",
"group": "CBC",
"search": "AllSky",
"area_50": 549.3176907907088,
"area_90": 2014.934218740709,
"duration": null,
"pipeline": "MBTA",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.05019140791152701,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "f4ef5d15c03ad479184bf4209dd39b4f",
"classification": {
"BBH": 0.9112745856421383,
"BNS": 3.4536281733174067e-18,
"NSBH": 0.0009143175337625946,
"Terrestrial": 0.08781109682409916
},
"skymap_version": 2,
"central_frequency": null
},
"alert_type": "UPDATE",
"sequence_num": 4,
"time_created": "2023-09-05T21:44:04Z",
"superevent_id": "S230904n",
"external_coinc": null
},
"message_text": "",
"published": "2023-09-05T21:44:06.297089Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-09-05T21:44:06.297109Z",
"modified": "2023-09-05T21:44:06.301536Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2736,
"topic": "gcn.circular",
"uuid": "8745fa80-b97d-4634-bb59-03b39978cf19",
"title": "SUBJECT: LIGO/Virgo/KAGRA S230904n: Updated Sky localization and EM Bright Classification",
"submitter": "Hop gcn.circular",
"authors": "jgolomb@caltech.edu",
"data": {
"date": "23/09/05 21:49:27 GMT",
"from": "jgolomb@caltech.edu",
"title": "GCN CIRCULAR",
"number": "34629",
"subject": "SUBJECT: LIGO/Virgo/KAGRA S230904n: Updated Sky localization and EM Bright Classification"
},
"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 S230904n (GCN Circular 34612). 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/S230904n\n\nBased on posterior support from parameter estimation [1], under the assumption that the candidate S230904n is astrophysical in origin, the probability that the lighter compact object is consistent with a neutron star mass (HasNS) is <1%. [2] Using the masses and spins inferred from the signal, the probability of matter outside the final compact object (HasRemnant) is <1%. [2] Both HasNS and HasRemnant consider the support of several neutron star equations of state. The probability that either of the binary components lies between 3 and 5 solar masses (HasMassgap) is 5%.\n\nFor the Bilby.multiorder.fits,0 sky map, the 90% credible region is 2015 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 1095 +/- 327 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 [2] Chatterjee et al. ApJ 896, 54 (2020)\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkzOTUwNTcyLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.x9N54Yl9K03nFi76WkASBvpWDTiDOXi-pFFt4NuiQuA\n\n",
"published": "2023-09-05T21:49:43.018614Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-09-05T21:49:43.018640Z",
"modified": "2023-09-05T21:49:43.022805Z",
"nonlocalizedevents": [
{
"event_id": "S230904n"
}
],
"targets": []
},
{
"id": 2737,
"topic": "igwn.gwalert",
"uuid": "beee897e-c174-49d1-a1f5-167b51962d91",
"title": "S230906b - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230906b/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230906b/view/"
},
"event": {
"far": 4.788024626946577e-06,
"time": "2023-09-06T00:38:59.485Z",
"group": "CBC",
"search": "AllSky",
"area_50": 1051.8447608608951,
"area_90": 3808.714561968276,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.028157865123382364,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "b11110d886564e81747dcf2b51a7b82b",
"classification": {
"BBH": 0.3065653703540373,
"BNS": 8.692539329624201e-14,
"NSBH": 2.0107436783016143e-11,
"Terrestrial": 0.6934346296257683
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-09-06T00:41:22Z",
"superevent_id": "S230906b",
"external_coinc": null
},
"message_text": "",
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{
"id": 2756,
"topic": "gcn.circular",
"uuid": "1998ab70-4215-4e83-b53f-76f5f4987888",
"title": "GRB 230905B: AstroSat CZTI detection",
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"authors": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"data": {
"date": "23/09/07 08:06:48 GMT",
"from": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"title": "GCN CIRCULAR",
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},
"message_text": "P. K. Navaneeth (IUCAA), G. Waratkar (IITB), A. Vibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (Ashoka University/IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:\n\nAnalysis of AstroSat CZTI data with the CIFT framework (Sharma et al., 2021, JApA, 42, 73) showed the detection of a long GRB 230905B which was also detected by GECAM-C (Xiong et al., GCN Circ. 34630), and INTEGRAL/SPI-ACS.\n\nThe source was clearly detected in the 20-200 keV energy range. The light curve peaks at 2023-09-05 15:49:37.50 UTC. The measured peak count rate associated with the burst is 186 (+46, -24) counts/s above the background in the combined data of all quadrants, with a total of 1858 (+502, -520) counts. The local mean background count rate was 447 (+2, -3) counts/s. Using cumulative rates, we measure a T90 of 45 (+14, -22) s.\n\nThe source was also detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range.\n\nCZTI is built by a TIFR-led consortium of institutes across India, including VSSC, URSC, IUCAA, SAC, and PRL. The Indian Space Research Organisation funded, managed, and facilitated the project.\n\nCZTI GRB detections are reported regularly on the payload site at:\nhttp://astrosat.iucaa.in/czti/?q=grb\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjk0MDc0MDE0LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.n-4hfPKkkZzwXca907nzEPMvneLVlAva5n6hkK7uEUQ\n\n",
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{
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"title": "S230907ah - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"time_created": "2023-09-07T12:41:13Z",
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{
"id": 9271,
"topic": "lvk-users.beccatest",
"uuid": "2546d979-8992-45fa-a222-fff08eed967e",
"title": "Generic Message",
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"authors": "",
"data": {
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],
"range": 49.47678095124284
},
"message_text": "",
"published": "2024-05-23T15:21:47.672436Z",
"message_parser": "",
"retracted": false,
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{
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"topic": "igwn.gwalert",
"uuid": "ebaeed1f-544c-41a1-98ce-6de947d82809",
"title": "S231029e - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"time_created": "2023-10-29T00:55:12Z",
"superevent_id": "S231029e",
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"published": "2023-10-31T23:28:07.715941Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-10-31T23:28:07.715965Z",
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{
"id": 9272,
"topic": "lvk-users.beccatest",
"uuid": "8820401a-38da-4b0e-a952-7f71477bb2ce",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
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"range": 152.54847587560965
},
"message_text": "",
"published": "2024-05-23T15:23:18.831361Z",
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{
"id": 4315,
"topic": "igwn.gwalert",
"uuid": "5a26d06f-d014-42e3-9c92-dc8c360b1311",
"title": "S231102aq - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
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"event": {
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"time": "2023-11-02T12:58:34.485Z",
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"message_text": "",
"published": "2023-11-02T13:05:46.819624Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-11-02T13:05:46.819664Z",
"modified": "2023-11-02T13:05:46.825421Z",
"nonlocalizedevents": [],
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{
"id": 4316,
"topic": "gcn.circular",
"uuid": "6a72a8c2-2da4-4b29-8053-f0e9f27c7b96",
"title": "GRB 231024A: GRANDMA observations of AT2023vuc/GOTO23baj candidate",
"submitter": "Hop gcn.circular",
"authors": "Dalya Akl at American Uni. SHJ <dalyaakl.d@gmail.com>",
"data": {
"date": "23/11/02 13:35:29 GMT",
"from": "Dalya Akl at American Uni. SHJ <dalyaakl.d@gmail.com>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34928"
},
"title": "GCN CIRCULAR",
"number": "34928",
"subject": "GRB 231024A: GRANDMA observations of AT2023vuc/GOTO23baj candidate"
},
"message_text": "D. Akl (AUS), D. Turpin (CEA-Saclay/Irfu), P. Gokuldass (ERAU), R. Strausbaugh (EUI), Z. Vidadi (ShAO), S. Antier, A. de Ugarte Postigo (OCA/Artemis), M. Coughlin (UMN), Q. Andre (OCA), J. Peloton, P. Hello (IJCLAB), I. Tosta e Melo (UniCT-DFA), T. Pradier(Unistra/IPHC), S. Karpov, M. Prouza, M. Mašek, M. Blazek (FZU), A. Klotz (IRAP), A. Takey, M. Ismail, M. Abdelkareem, M. Molham (NRIAG), L. Almeida, L. Fraga, W. Corradi, N. Sasaki (LNA), F. Navarete (NOIRLab/SOAR), M. Freeberg (KNC) on behaf of the GRANDMA and Kilonova-Catcher collaborations:\n\nThe GRANDMA and Kilonova-Catcher telescope networks observed the source GOTO23baj/SN2023vuc (Gompertz et al., GCN 34878, Iglesias-López et al, GCN 34881), finally classified as a young supernova (Saccardi et al, GCN 34882). We used Skyportal (Coughlin et al., 2023) for the coordination of our observations.\n\nObservations were conducted from 2023-10-25 17:15:51 to 2023-11-01 03:00:12, ~0.91-7.15 days after the GOTO detection time (midtime ref = 2023-10-24T23:23:27.50 from Gompertz et al., GCN 34878).\n\nIn the following table, we report a subset of the preliminary photometry of our observations. Magnitudes are reported in the AB and Vega system depending on the filter set.\n\nT-T0 day|MJD |Obser. |Exposure|Filter | Mag +/- err\n--------------------------------------------------------------------------\n0.91 |60242.886 | Les Makes |50X120s | r | 18.56+/-0.19 (AB)\n1.04 |60243.019 | FRAM-CTA-N |76x120s | V | 18.51 U.L (Vega)\n5.32 |60247.290 | KNC-T11 |17x180s | Rc | 18.03+/-0.09 (Vega)\n5.92 |60247.889 | KAO |11x180s | r | 18.27+/-0.01 (AB)\n5.96 |60247.932 | KAO |11x180s | i | 18.51+/-0.02 (AB)\n6.23 |60248.206 | KNC-T11 |17x180s | Rc | 18.17+/-0.08 (Vega)\n6.81 |60248.793 | KAO |15x180s | i | 18.46+/-0.01 (AB)\n6.85 |60248.829 | KAO |14x180s | r | 18.42+/-0.01 (AB)\n7.13 |60249.105 | SOAR |5x75s | r | 18.33+/-0.01 (AB)\n7.14 |60249.111 | SOAR |3x150s | i | 18.37+/-0.01 (AB)\n7.14 |60249.117 | SOAR |3x200s | g | 18.03+/-0.01 (AB)\n7.15 |60249.125 | SOAR |2x120s | z | 18.64+/-0.05 (AB)\n\nOur images were taken under poor conditions and a bright moon. All the data in Sloan filters have been calibrated with respect to the PS1 catalog. Johnson filters have been measured using the Gaia catalog. All the data have been reduced by a single data processing pipeline STDPIPE (Karpov et al., 2022). Please contact us for more information and collaboration on this source.\n\nGRANDMA is a worldwide coordinated telescope network (grandma.ijclab.in2p3.fr) devoted to the observation of transients in the context of multi-messenger astrophysics (Antier et al. 2020 MNRAS497, 5518). Kilonova-Catcher (KNC) is the citizen science program of GRANDMA (http://kilonovacatcher.in2p3.fr/).\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34928.",
"published": "2023-11-02T13:35:40.220547Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-02T13:35:40.220572Z",
"modified": "2023-11-02T13:35:40.227441Z",
"nonlocalizedevents": [],
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},
{
"id": 2763,
"topic": "gcn.circular",
"uuid": "58b97e73-bf44-409c-808d-8a8921f5bc73",
"title": "GRB 230906A: Swift ToO observations",
"submitter": "Hop gcn.circular",
"authors": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"data": {
"date": "23/09/07 14:44:50 GMT",
"from": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"title": "GCN CIRCULAR",
"number": "34636",
"subject": "GRB 230906A: Swift ToO observations"
},
"message_text": "P. A. Evans (U. Leicester) reports on behalf of the Swift team:\n\nSwift has initiated a ToO observation of the IPN GRB 230906A.\nAutomated analysis of the XRT data will be presented online at\nhttps://www.swift.ac.uk/ToO_GRBs/00021621\n\nAny uncatalogued X-ray sources detected in this analysis will be\nreported on this website and via GCN COUNTERPART notices. These are\nnot necessarily related to the IPN event. Any X-ray source\nconsidered to be a probable afterglow candidate will be reported via a\nGCN Circular after manual consideration.\n\nDetails of the XRT automated analysis methods are detailed in Evans et\nal. (2007, A&A, 469, 379; 2009, MNRAS, 397, 1177 and 2014, ApJS, 210, 8).\n\nThis circular is an official product of the Swift-XRT team.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjk0MDk3ODk2LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.YsQPAfr-33aa2HRY-tmB4vu-s9OssYdX4Ux-DSiNrXk\n\n",
"published": "2023-09-07T14:45:06.275148Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-09-07T14:45:06.275166Z",
"modified": "2023-09-07T14:45:06.280734Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2764,
"topic": "gcn.circular",
"uuid": "c6821b1e-6361-4f3a-a02e-4ebdd5c6a33f",
"title": "IPN triangulation of GRB 230906A (short)",
"submitter": "Hop gcn.circular",
"authors": "Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>",
"data": {
"date": "23/09/07 14:58:27 GMT",
"from": "Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>",
"title": "GCN CIRCULAR",
"number": "34637",
"subject": "IPN triangulation of GRB 230906A (short)"
},
"message_text": "A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin\non behalf of the HEND/Mars Odyssey team,\n\nD. Svinkin, D. Frederiks, A. Lysenko, A. Ridnaia,\nand T. Cline on behalf of the Konus-Wind team,\n\nA. Goldstein, M. S. Briggs, C. Wilson-Hodge,\nand E. Burns on behalf of the Fermi GBM team,\n\nE. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,\n\nand\n\nW. Boynton, C. Fellows, K. Harshman, H. Enos, R. Starr,\nand A.S. Gardner on on behalf of the GRS-Odyssey GRB team,\nreport:\n\nThe bright, short-duration GRB 230906A\n(Fermi-GBM detection: The Fermi GBM team, GCN Circ. 34631)\nwas detected by Fermi (GBM trigger 715697712), INTEGRAL (SPI-ACS),\nKonus-Wind, and Mars-Odyssey (HEND) at about 46507 s UT (12:55:07).\n\nWe have triangulated it to a preliminary, 3 sigma error box\nwhose coordinates are:\n---------------------------------------------\n RA(2000), deg Dec(2000), deg\n ---------------------------------------------\n Center:\n 79.757 (05h 19m 02s) -47.887 (-47d 53' 13\")\n Corners:\n 79.710 (05h 18m 50s) -47.945 (-47d 56' 41\")\n 79.748 (05h 19m 00s) -47.986 (-47d 59' 08\")\n 79.803 (05h 19m 13s) -47.829 (-47d 49' 45\")\n 79.765 (05h 19m 04s) -47.788 (-47d 47' 17\")\n ---------------------------------------------\nThe error box area is 20 sq. arcmin, and its maximum\ndimension is 12 arcmin (the minimum one is 2 arcmin).\nThe Sun distance was 91 deg.\n\nThe IPN localization is consistent with, but reduces the area of,\nthe Fermi-GBM final localization (glg_healpix_all_bn230715190_v00).\n\nSwift ToO has been submitted (GCN 34636).\n\nThis localization may be improved.\n\nA triangulation map and HEALPix FITS file are posted at\nhttp://www.ioffe.ru/LEA/GRBs/GRB230906_T46507/IPN/\n\nThe Konus-Wind time history and spectrum will be given\nin a forthcoming GCN Circular.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjk0MDk4NzEzLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.ih3qNKTbDmsb5A_UL35l4TMtEyglAS0MMZxjtzktTag\n\n",
"published": "2023-09-07T14:58:44.093404Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-09-07T14:58:44.093421Z",
"modified": "2023-09-07T14:58:44.097662Z",
"nonlocalizedevents": [],
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},
{
"id": 2765,
"topic": "gcn.circular",
"uuid": "538f8c91-3dd6-4497-8b2a-95a1dbc1de2f",
"title": "Konus-Wind detection of GRB 230906A (short)",
"submitter": "Hop gcn.circular",
"authors": "Dmitry Frederiks at Ioffe Institute <fred@mail.ioffe.ru>",
"data": {
"date": "23/09/07 16:26:29 GMT",
"from": "Dmitry Frederiks at Ioffe Institute <fred@mail.ioffe.ru>",
"title": "GCN CIRCULAR",
"number": "34638",
"subject": "Konus-Wind detection of GRB 230906A (short)"
},
"message_text": "D. Frederiks, A.Lysenko, A. Ridnaia, D. Svinkin,\nA. Tsvetkova, M. Ulanov, and T. Cline,\non behalf of the Konus-Wind team, report:\n\nThe short GRB 230906A (Fermi GBM detection: the Fermi GBM team, GCN Circ 34631;\nIPN triangulation: Kozyrev et al., GCN Circ 34637)\ntriggered Konus-Wind (KW) at T0=46507.186 s UT (12:55:07.186).\n\nThe burst light curve shows a multi-peaked structure\nwhich starts at ~T0-0.256 s and has a duration of ~0.29 s.\nThe emission is seen up to ~2 MeV.\n\nThe Konus-Wind light curve of this GRB is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB230906_T46507/\n\nAs observed by Konus-Wind, the burst had\na total fluence of (2.55 ± 0.23)x10^-6 erg/cm^2 and\na 16-ms peak energy flux, measured from T0,\nof (3.48 ± 0.34)x10^-5 erg/cm^2/s (both in the 20 keV - 10 MeV energy range).\n\nThe spectrum of the burst (measured from T0 to T0+0.128 s)\nis best fit in the 20 keV - 15 MeV range by a power law with exponential\ncutoff (CPL) model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)\nwith alpha = -0.56(-0.13,+0.14) and Ep = 522(-56,+65) keV (chi2 = 27/35 dof).\nFitting this spectrum by a Band function yields the same values of alpha and Ep,\nand an upper limit on the high energy photon index beta of -2.1 (chi2 = 27/34 dof).\n\nAll the quoted errors are estimated at the 68% confidence level.\nAll the presented results are preliminary.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjk0MTAzOTk0LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.0AUL9Z0oUpoyRGa_-61iWsSDct1nvFkK3NXUoqbGeKw\n\n",
"published": "2023-09-07T16:26:45.802837Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-09-07T16:26:45.802857Z",
"modified": "2023-09-07T16:26:45.808439Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4079,
"topic": "gcn.circular",
"uuid": "514a30cc-f1b4-4aea-921f-a32fbf9e2745",
"title": "GRB 231017A: Mondy optical observations. A possible candidate for an afterglow or host galaxy.",
"submitter": "Hop gcn.circular",
"authors": "XXXX at IKI <alex@cgrsmx.iki.rssi.ru>",
"data": {
"date": "23/10/21 11:22:19 GMT",
"from": "XXXX at IKI <alex@cgrsmx.iki.rssi.ru>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34867"
},
"title": "GCN CIRCULAR",
"number": "34867",
"subject": "GRB 231017A: Mondy optical observations. A possible candidate for an afterglow or host galaxy."
},
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"time_created": "2023-09-08T03:55:08Z",
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"message_parser": "IGWN Alert Avro Parser v1",
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{
"id": 2783,
"topic": "gcn.circular",
"uuid": "71a309bd-e0e6-4a9c-b1e9-1b64426a212c",
"title": "GRB 230205A: LBT spectroscopy of two host galaxy candidates",
"submitter": "Hop gcn.circular",
"authors": "Elisabetta Maiorano at INAF <elisabetta.maiorano@inaf.it>",
"data": {
"date": "23/09/08 08:40:01 GMT",
"from": "Elisabetta Maiorano at INAF <elisabetta.maiorano@inaf.it>",
"title": "GCN CIRCULAR",
"number": "34640",
"subject": "GRB 230205A: LBT spectroscopy of two host galaxy candidates"
},
"message_text": "E. Maiorano (INAF-OAS), V. D'Elia (SSDC & INAF-OAR), D. B. Malesani (Radboud Univ. and DAWN/NBI), A. Rossi, E. Palazzi (INAF-OAS), P. DâAvanzo (INAF-OAB), A. Melandri ( INAF-OAR), M. De Pasquale (Messina Univ.) on behalf of CIBO collaboration.\n\nWe report the results of the spectroscopic observations of two host galaxy candidates for the short GRB 230205A (Ambrosi et al., GCN 33271), first identified by Tomasella et al. (GCN 33302) and Urata et al. (GCN 33307) in deep Subaru archival imaging.\n\nThe optical spectra of the two candidate host galaxies were obtained with the Multi-Object Double Spectrographs (MODS) instrument mounted on the 2x8.4-m LBT telescope (Mt. Graham, AZ, USA) on 2023-03-04, 27 days after the burst trigger. The spectra cover the wavelength range 3200-10000 AA, with a total of exposure time of 1.5 hours.\n\nWe detect a faint and red continuum with few emission lines for the brightest galaxy that we tentatively identify as H-alpha, and H-beta at a common redshift of z=0.429 (consistent with the photometric redshift of z = 0.484 ± 0.090 provided by SDSS, see Tomasella et al., GCN 33302). The spectral trace of the fainter galaxy is too weak to allow a reliable identification of any emission line, thus not permitting its redshift estimate.\n\nMultiband photometry was also collected between June and July (4-5 months after the GRB trigger) in the r, z and H bands, with both galaxies detected in all filters. These images also show an additional fainter host galaxy candidate at coordinates 13:28:16.56 +46:43:34.7, underlining the complexity of the field.\n\nWe acknowledge the excellent support from the LBTO and LBT-INAF staff, particularly D. Thompson, E. Marini, and D. Paris, in obtaining these observations.\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjk0MTYyNDA3LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.icGooo_0ymrYpu95JJvPJZa5wElEgJb4VBc0ev3Q-cA\n\n",
"published": "2023-09-08T08:40:17.920536Z",
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"retracted": false,
"created": "2023-09-08T08:40:17.920568Z",
"modified": "2023-09-08T08:40:17.932031Z",
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"authors": "LVK",
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"topic": "igwn.gwalert",
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"title": "S230908aa - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"topic": "igwn.gwalert",
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"title": "S230908ad - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"time_created": "2023-09-08T12:51:36Z",
"superevent_id": "S230908ad",
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},
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"published": "2023-09-08T12:51:37.805490Z",
"message_parser": "IGWN Alert Avro Parser v1",
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"modified": "2023-09-08T12:51:37.811515Z",
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{
"id": 2787,
"topic": "igwn.gwalert",
"uuid": "8f6132b5-bdb3-483e-a16d-1687cfda9f31",
"title": "S230908ad - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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},
"event": {
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"time": "2023-09-08T12:50:24.072Z",
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"area_90": 1509.8892677348897,
"duration": 0.016291,
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"classification": {},
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"sequence_num": 2,
"time_created": "2023-09-08T12:56:11Z",
"superevent_id": "S230908ad",
"external_coinc": null
},
"message_text": "",
"published": "2023-09-08T12:56:12.324751Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-09-08T12:56:12.324769Z",
"modified": "2023-09-08T12:56:12.328376Z",
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},
{
"id": 2790,
"topic": "igwn.gwalert",
"uuid": "5b214aec-ae81-4298-bc8b-f1b07d41af2a",
"title": "S230908al - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"gracedb": "https://gracedb.ligo.org/superevents/S230908al/view/"
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"event": {
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"time": "2023-09-08T13:22:14.120Z",
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"time_created": "2023-09-08T13:22:48Z",
"superevent_id": "S230908al",
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},
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"published": "2023-09-08T13:22:50.326921Z",
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{
"id": 9283,
"topic": "lvk-users.beccatest",
"uuid": "23bbeb71-6591-4f94-945d-a0f90cc0fe05",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
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],
"time": [
1400513300
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"range": 49.651590228080245
},
"message_text": "",
"published": "2024-05-23T15:28:26.908756Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T15:28:26.908800Z",
"modified": "2024-05-23T15:28:26.908815Z",
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{
"id": 9284,
"topic": "lvk-users.beccatest",
"uuid": "45232936-a2f6-4aca-86ae-ac374e1eab9b",
"title": "Generic Message",
"submitter": "",
"authors": "",
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1400513400
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"range": 153.13004723689042
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"message_text": "",
"published": "2024-05-23T15:30:00.273174Z",
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{
"id": 9285,
"topic": "lvk-users.beccatest",
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1400513400
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},
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{
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},
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{
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"topic": "lvk-users.beccatest",
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{
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{
"id": 2791,
"topic": "igwn.gwalert",
"uuid": "1a0a09bc-e4fe-4834-8614-0bb5c3fa9a0c",
"title": "S230908al - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"gracedb": "https://gracedb.ligo.org/superevents/S230908al/view/"
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},
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"published": "2023-09-08T13:27:31.056161Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-09-08T13:27:31.056197Z",
"modified": "2023-09-08T13:27:31.066697Z",
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},
{
"id": 2792,
"topic": "hermes.message",
"uuid": "91960bc3-7563-4bca-9394-a0cbbf60983f",
"title": "INTEGRAL follow-up of S230907ap",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230907ap at 2023-09-07T14:22:05.000\n\n\nSPI-ACS excesses:\nat T0+-94.4 FAP = 0.177\nat T0+176.78 FAP = 0.303\nat T0+243.83 FAP = 0.684\n\n\n\n\nnext break in data in 28 hr: 2023-09-08T18:02:33, for 9.3 hr",
"published": "2023-09-08T13:48:54.248178Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-09-08T13:48:54.248212Z",
"modified": "2023-09-08T13:48:54.263976Z",
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},
{
"id": 2793,
"topic": "hermes.message",
"uuid": "4d64a39a-1a82-4387-b856-b6757d76500e",
"title": "INTEGRAL follow-up of S230901u",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230901u at 2023-09-01T06:15:29.000\n\n\nSPI-ACS excesses:\n\n\n\n\nnext break in data in 52 hr: 2023-09-03T10:22:38, for 9.3 hr",
"published": "2023-09-08T13:57:36.928201Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-09-08T13:57:36.928234Z",
"modified": "2023-09-08T13:57:36.939925Z",
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},
{
"id": 2794,
"topic": "hermes.message",
"uuid": "73cf433f-31dc-4e8a-8252-e80d3ae2e412",
"title": "INTEGRAL follow-up of S230907bi",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230907bi at 2023-09-07T19:48:01.000\n\n\nSPI-ACS excesses:\nat T0+-5.26 FAP = 0.213\nat T0+41.42 FAP = 0.356\nat T0+-8.23 FAP = 0.678\nat T0+-51.48 FAP = 0.99\nat T0+-76.41 FAP = 0.994\n\n\n\n\nnext break in data in 22 hr: 2023-09-08T18:02:33, for 9.3 hr",
"published": "2023-09-08T14:38:56.468308Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-09-08T14:38:56.468342Z",
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},
{
"id": 2795,
"topic": "hermes.message",
"uuid": "ca3176f5-1952-43d2-b143-5bd057ffcb6b",
"title": "INTEGRAL follow-up of S230906b",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230906b at 2023-09-06T00:38:59.000\n\n\nSPI-ACS excesses:\nat T0+21.16 FAP = 0.134\nat T0+-8.67 FAP = 0.246\nat T0+-12.44 FAP = 0.291\nat T0+8.33 FAP = 0.342\n\n\n\n\nnext break in data in 0.43 hr: 2023-09-06T01:04:57, for 10 hr",
"published": "2023-09-08T14:57:27.216300Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-09-08T14:57:27.216335Z",
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},
{
"id": 2796,
"topic": "hermes.message",
"uuid": "a11802e9-c0cd-4046-81a8-00ebdcd9e5f3",
"title": "INTEGRAL follow-up of S230830g",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230830g at 2023-08-30T04:49:16.000\n\n\nSPI-ACS excesses:\nat T0+12.41 FAP = 0.194\nat T0+286.11 FAP = 0.305\nat T0+-66.57 FAP = 0.766\nat T0+-4.97 FAP = 0.775\nat T0+29.06 FAP = 0.802\n\n\n\n\nnext break in data in 38 hr: 2023-08-31T18:31:55, for 9.3 hr",
"published": "2023-09-08T17:08:42.254364Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-09-08T17:08:42.254403Z",
"modified": "2023-09-08T17:08:42.259244Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2797,
"topic": "hermes.message",
"uuid": "61d96f97-7307-4c5f-afb6-6d435c0b63e2",
"title": "INTEGRAL follow-up of S230907bf",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230907bf at 2023-09-07T19:26:11.000\n\n\nSPI-ACS excesses:\nat T0+-153.73 FAP = 0.261\nat T0+135.02 FAP = 0.302\nat T0+-19.78 FAP = 0.445\nat T0+290.44 FAP = 0.495\nat T0+-110.58 FAP = 0.536\nat T0+-47.06 FAP = 0.748\n\n\n\n\nnext break in data in 23 hr: 2023-09-08T18:02:33, for 9.3 hr",
"published": "2023-09-08T18:48:23.397945Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-09-08T18:48:23.397961Z",
"modified": "2023-09-08T18:48:23.401862Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2798,
"topic": "hermes.message",
"uuid": "bebc02dd-cefe-4c96-8768-4661cc8181e7",
"title": "INTEGRAL follow-up of S230831e",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230831e at 2023-08-31T01:54:14.000\n\n\nSPI-ACS excesses:\nat T0+14.91 FAP = 0.011\nat T0+-0.04 FAP = 0.013\nat T0+22.01 FAP = 0.316\nat T0+-23.14 FAP = 0.473\nat T0+-286.59 FAP = 0.541\nat T0+126.96 FAP = 0.591\nat T0+65.93 FAP = 0.964\n\n\n\n\nnext break in data in 17 hr: 2023-08-31T18:31:55, for 9.3 hr",
"published": "2023-09-08T19:08:20.074945Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-09-08T19:08:20.074961Z",
"modified": "2023-09-08T19:08:20.078671Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1,
"topic": "gcn.circular",
"uuid": "025112ec-3f89-43bb-b257-72a036144315",
"title": "LIGO/Virgo S230518h: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/05/18 18:28:23 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33817",
"subject": "LIGO/Virgo S230518h: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-Amur robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the LIGO/Virgo S230518h errorbox 192 sec after notice time and 10188 sec after trigger time at 2023-05-18 15:48:56 UT, with upper limit up to 17.7 mag. The observations began at zenith distance = 83 deg. The sun altitude is -20.3 deg.\n\nMASTER-SAAO robotic telescope located in South Africa (South African Astronomical Observatory) started inspect of the LIGO/Virgo S230518h errorbox 3191 sec after notice time and 13187 sec after trigger time at 2023-05-18 16:38:55 UT, with upper limit up to 17.7 mag. Observations started at twilight. The observations began at zenith distance = 43 deg. The sun altitude is -11.0 deg.\n\nThe galactic latitude b = -11 deg., longitude l = 223 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011865\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 10278 | 2023-05-18 15:48:56 | MASTER-Amur | (23h 42m 34.05s , +27d 56m 23.2s) | C | 180 | 16.4 |\n 10486 | 2023-05-18 15:52:23 | MASTER-Amur | (23h 36m 00.68s , +26d 00m 33.9s) | C | 180 | 16.5 |\n 10686 | 2023-05-18 15:55:44 | MASTER-Amur | (23h 56m 30.29s , +27d 55m 52.4s) | C | 180 | 15.6 |\n 11213 | 2023-05-18 16:04:31 | MASTER-Amur | (00h 13m 40.72s , +29d 50m 21.9s) | C | 180 | 15.3 |\n 11413 | 2023-05-18 16:07:51 | MASTER-Amur | (23h 55m 58.92s , +31d 42m 40.7s) | C | 180 | 17.0 |\n 11647 | 2023-05-18 16:11:44 | MASTER-Amur | (00h 05m 25.45s , +31d 43m 52.8s) | C | 180 | 16.6 |\n 12170 | 2023-05-18 16:20:28 | MASTER-Amur | (23h 56m 00.17s , +31d 44m 12.4s) | C | 180 | 16.8 |\n 12370 | 2023-05-18 16:23:48 | MASTER-Amur | (00h 05m 18.97s , +31d 43m 14.6s) | C | 180 | 16.9 |\n 12571 | 2023-05-18 16:27:08 | MASTER-Amur | (23h 25m 22.89s , +27d 54m 58.8s) | C | 180 | 17.5 |\n 12770 | 2023-05-18 16:30:28 | MASTER-Amur | (23h 34m 20.58s , +27d 54m 00.4s) | C | 180 | 17.3 |\n 12970 | 2023-05-18 16:33:47 | MASTER-Amur | (23h 18m 57.17s , +26d 01m 19.5s) | C | 180 | 17.5 |\n 13170 | 2023-05-18 16:37:07 | MASTER-Amur | (23h 27m 50.84s , +25d 59m 52.3s) | C | 180 | 17.4 |\n 13278 | 2023-05-18 16:38:55 | MASTER-SAAO | (06h 32m 29.44s , -23d 26m 27.9s) | C | 180 | 17.3 |\n 13278 | 2023-05-18 16:38:55 | MASTER-SAAO | (06h 33m 19.54s , -23d 26m 52.9s) | C | 180 | 17.4 |\n 13370 | 2023-05-18 16:40:27 | MASTER-Amur | (23h 25m 21.09s , +27d 55m 38.3s) | C | 180 | 17.5 |\n 13489 | 2023-05-18 16:42:27 | MASTER-SAAO | (06h 41m 06.20s , -23d 27m 07.7s) | C | 180 | 15.8 |\n 13489 | 2023-05-18 16:42:27 | MASTER-SAAO | (06h 41m 56.73s , -23d 27m 32.5s) | C | 180 | 15.7 |\n 13569 | 2023-05-18 16:43:47 | MASTER-Amur | (23h 34m 18.00s , +27d 54m 49.9s) | C | 180 | 17.5 |\n 13689 | 2023-05-18 16:45:47 | MASTER-SAAO | (06h 26m 56.44s , -21d 32m 00.9s) | C | 180 | 15.9 |\n 13689 | 2023-05-18 16:45:47 | MASTER-SAAO | (06h 27m 46.21s , -21d 32m 26.0s) | C | 180 | 15.9 |\n 13769 | 2023-05-18 16:47:06 | MASTER-Amur | (23h 18m 51.54s , +26d 01m 33.5s) | C | 180 | 17.7 |\n 13901 | 2023-05-18 16:49:18 | MASTER-SAAO | (06h 35m 40.83s , -21d 32m 55.8s) | C | 180 | 17.7 |\n 13901 | 2023-05-18 16:49:18 | MASTER-SAAO | (06h 36m 30.85s , -21d 33m 20.5s) | C | 180 | 17.7 |\n 13968 | 2023-05-18 16:50:26 | MASTER-Amur | (23h 27m 53.06s , +26d 00m 39.5s) | C | 180 | 17.6 |\n 14112 | 2023-05-18 16:52:49 | MASTER-SAAO | (06h 22m 09.91s , -19d 39m 15.3s) | C | 180 | 15.3 |\n 14112 | 2023-05-18 16:52:49 | MASTER-SAAO | (06h 22m 59.36s , -19d 39m 40.9s) | C | 180 | 15.4 |\n 14168 | 2023-05-18 16:53:46 | MASTER-Amur | (23h 26m 09.80s , +20d 17m 47.3s) | C | 180 | 17.5 |\n 14569 | 2023-05-18 17:00:26 | MASTER-Amur | (23h 27m 45.99s , +22d 13m 09.2s) | C | 180 | 17.4 |\n 14769 | 2023-05-18 17:03:46 | MASTER-Amur | (23h 36m 17.86s , +22d 12m 37.0s) | C | 180 | 17.4 |\n 14969 | 2023-05-18 17:07:06 | MASTER-Amur | (23h 26m 03.47s , +20d 19m 20.5s) | C | 180 | 17.4 |\n 15391 | 2023-05-18 17:14:09 | MASTER-Amur | (23h 27m 38.02s , +22d 11m 11.9s) | C | 180 | 17.5 |\n 15591 | 2023-05-18 17:17:28 | MASTER-Amur | (23h 36m 21.64s , +22d 11m 45.9s) | C | 180 | 17.4 |\n 15791 | 2023-05-18 17:20:48 | MASTER-Amur | (23h 30m 53.60s , +24d 05m 24.2s) | C | 180 | 17.6 |\n 15991 | 2023-05-18 17:24:08 | MASTER-Amur | (23h 39m 42.89s , +24d 07m 13.7s) | C | 180 | 17.6 |\n 16190 | 2023-05-18 17:27:28 | MASTER-Amur | (00h 13m 23.27s , +27d 55m 46.2s) | C | 180 | 17.0 |\n 16390 | 2023-05-18 17:30:47 | MASTER-Amur | (00h 22m 34.20s , +27d 54m 50.2s) | C | 180 | 16.8 |\n 16789 | 2023-05-18 17:37:26 | MASTER-Amur | (00h 04m 00.08s , +27d 48m 45.4s) | C | 180 | 16.8 |\n 16989 | 2023-05-18 17:40:46 | MASTER-Amur | (00h 03m 57.56s , +27d 50m 06.1s) | C | 180 | 16.8 |\n 17189 | 2023-05-18 17:44:06 | MASTER-Amur | (00h 03m 57.25s , +27d 48m 30.8s) | C | 180 | 16.7 |\n 17875 | 2023-05-18 17:55:33 | MASTER-Amur | (23h 30m 51.84s , +24d 05m 05.7s) | C | 180 | 16.9 |\n 18075 | 2023-05-18 17:58:52 | MASTER-Amur | (23h 39m 33.41s , +24d 04m 17.8s) | C | 180 | 16.6 |\n 18280 | 2023-05-18 18:02:18 | MASTER-Amur | (00h 13m 26.48s , +27d 53m 29.6s) | C | 180 | 15.9 |\n 18480 | 2023-05-18 18:05:37 | MASTER-Amur | (00h 22m 26.18s , +27d 54m 42.7s) | C | 180 | 15.8 |\n 18679 | 2023-05-18 18:08:57 | MASTER-Amur | (23h 55m 59.05s , +29d 47m 58.1s) | C | 180 | 16.0 |\n 18879 | 2023-05-18 18:12:17 | MASTER-Amur | (00h 05m 53.80s , +29d 47m 33.9s) | C | 180 | 15.8 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-05-18T18:28:33.247908Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-18T18:28:33.247934Z",
"modified": "2023-05-18T18:28:33.252792Z",
"nonlocalizedevents": [
{
"event_id": "S230518h"
}
],
"targets": []
}
]
}
