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"count": 257459,
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"previous": "https://hermes.lco.global/api/v0/messages/?format=api&limit=100&offset=700&ordering=retracted",
"results": [
{
"id": 649,
"topic": "gcn.circular",
"uuid": "5bc18a7c-72b7-4ba4-a7af-80602727b0aa",
"title": "LIGO/Virgo/KAGRA S230624av: Updated Sky localization",
"submitter": "Hop gcn.circular",
"authors": "Geraint Pratten at University of Birmingham/LIGO <geraint.pratten@ligo.org>",
"data": {
"date": "23/06/26 17:43:17 GMT",
"from": "Geraint Pratten at University of Birmingham/LIGO <geraint.pratten@ligo.org>",
"title": "GCN CIRCULAR",
"number": "34083",
"subject": "LIGO/Virgo/KAGRA S230624av: 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 S230624av (GCN Circular 34075). 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/S230624av\n\nFor the Bilby.multiorder.fits,0 sky map, the 90% credible region is 1024 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 2124 +/- 682 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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3ODAxNDAyLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.Qto7bw6Qxb7lSZTA3ArwcIuBwDeUnSSdnQicmy9IaxU\n\n",
"published": "2023-06-26T17:43:28.384602Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-26T17:43:28.384623Z",
"modified": "2023-06-26T17:43:28.391802Z",
"nonlocalizedevents": [
{
"event_id": "S230624a"
}
],
"targets": []
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{
"id": 650,
"topic": "igwn.gwalert",
"uuid": "03706748-31a3-42ae-993b-2302d5424dc6",
"title": "S230626bq - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
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"gracedb": "https://gracedb.ligo.org/superevents/S230626bq/view/"
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"event": {
"far": 2.004140151257161e-05,
"time": "2023-06-26T18:46:52.146Z",
"group": "CBC",
"search": "AllSky",
"area_50": 788.0967328532859,
"area_90": 2716.793529548547,
"duration": null,
"pipeline": "spiir",
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"sequence_num": 1,
"time_created": "2023-06-26T18:48:17Z",
"superevent_id": "S230626bq",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-26T18:48:19.053736Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-26T18:48:19.053760Z",
"modified": "2023-06-26T18:48:19.059578Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 652,
"topic": "hermes.message",
"uuid": "c132b1e5-3132-4a4f-b071-1468330e5463",
"title": "INTEGRAL follow-up of S230626bq",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230626bq at 2023-06-26T18:46:52.000\n\n\nSPI-ACS excesses:\nat T0+-76.27 FAP = 0.251\nat T0+232.78 FAP = 0.326\nat T0+187.58 FAP = 0.439\nat T0+81.5 FAP = 0.502\nat T0+-201.17 FAP = 0.724\nat T0+-187.27 FAP = 0.813\nat T0+85.35 FAP = 0.875\n\n\n\n\nnext break in data in 51 hr: 2023-06-28T22:05:52, for 9.3 hr",
"published": "2023-06-26T18:59:03.424681Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-26T18:59:03.424702Z",
"modified": "2023-06-26T18:59:03.430012Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 653,
"topic": "gcn.circular",
"uuid": "36e6e830-460f-41e5-87dd-70258ae811e9",
"title": "GRB 230625B: Swift/BAT-GUANO detection of a long burst",
"submitter": "Hop gcn.circular",
"authors": "Samuele Ronchini at PSU <sjs8171@psu.edu>",
"data": {
"date": "23/06/26 23:54:39 GMT",
"from": "Samuele Ronchini at PSU <sjs8171@psu.edu>",
"title": "GCN CIRCULAR",
"number": "34084",
"subject": "GRB 230625B: Swift/BAT-GUANO detection of a long burst"
},
"message_text": "Samuele Ronchini (PSU), James DeLaunay (U Alabama), Aaron Tohuvavohu (U Toronto), Gayathri Raman (PSU), Jamie A. Kennea (PSU), Tyler Parsotan (NASA GSFC) report: \n\nSwift/BAT did not localize GRB 230625B onboard (T0: 2023-06-25T07:28:45.61 UTC, CALET trig. 1371713313). \n\nThe CALET 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 10.93 in a 16.384 s analysis time bin, starting at T0+4.096 s.\n\nNITRATES results, independently, are ambiguous with respect to whether this burst originates from inside or outside the BAT coded FOV, with a DeltaLLHOut of 12.81 and DeltaLLHPeak of 2.84.\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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3ODIzNjg1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.U0R_b2JeCtwfrWdYcrFH4P4i9UqRmjLcEoUzk2fH5JY\n\n",
"published": "2023-06-26T23:54:52.149979Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-26T23:54:52.150000Z",
"modified": "2023-06-26T23:54:52.157335Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 668,
"topic": "igwn.gwalert",
"uuid": "83b70c52-c260-42b0-92b5-1a0f958ef43f",
"title": "S230627v - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230627v/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230627v/view/"
},
"event": {
"far": 1.078086461347993e-05,
"time": "2023-06-27T05:42:27.362Z",
"group": "CBC",
"search": "AllSky",
"area_50": 3849.839950583623,
"area_90": 12810.978200503254,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.0,
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"instruments": [
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"significant": false,
"skymap_hash": "358a86251a10fdf65dd02830313f24d0",
"classification": {
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"BNS": 0.16977270211612225,
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},
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"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-06-27T05:42:53Z",
"superevent_id": "S230627v",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-27T05:42:54.245706Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-27T05:42:54.245729Z",
"modified": "2023-06-27T05:42:54.250604Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 654,
"topic": "gcn.circular",
"uuid": "c631f622-06eb-4196-a717-f12e07964823",
"title": "GRB 230618A: Swift-BAT refined analysis",
"submitter": "Hop gcn.circular",
"authors": "Sibasish Laha at GSFC <sibasish.laha@nasa.gov>",
"data": {
"date": "23/06/27 00:39:58 GMT",
"from": "Sibasish Laha at GSFC <sibasish.laha@nasa.gov>",
"title": "GCN CIRCULAR",
"number": "34085",
"subject": "GRB 230618A: Swift-BAT refined analysis"
},
"message_text": "C. B. Markwardt (GSFC), S. D. Barthelmy (GSFC),\nH. A. Krimm (NSF), S. Laha (GSFC/UMBC),\nA. Y. Lien (U Tampa), D. M. Palmer (LANL),\nT. Parsotan (GSFC/UMBC), T. Sakamoto (AGU),\nM. Stamatikos (OSU) (i.e. the Swift-BAT team):\n\nUsing the data set from T-275 to T+963 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 230618A (trigger #1175438)\n(Page et al., GCN Circ. 33989). The BAT ground-calculated position is\nRA, Dec = 196.642, 3.278 deg which is\n RA(J2000) = 13h 06m 34.1s\n Dec(J2000) = +03d 16' 39.6\"\nwith an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 100%.\n\nThe BAT light curve showed a complex structure with a duration of about 200 sec.\nT90 (15-350 keV) is 104.05 +- 22.86 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-27.78 to T+107.00 sec is best fit by a simple\npower-law model. The power law index of the time-averaged spectrum is\n1.35 +- 0.15. The fluence in the 15-150 keV band is 1.5 +- 0.2 x 10^-06 erg/cm2.\nThe 1-sec peak photon flux measured from T+9.04 sec in the 15-150 keV band\nis 0.5 +- 0.1 ph/cm2/sec. All the quoted errors are at the 90% confidence\nlevel.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/1175438/BA/\n\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3ODI2NDAzLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.yzrIPEUR8RgyfU28CIS2givI2KA-ECCm9zs9HH7NhoY\n\n",
"published": "2023-06-27T00:40:08.668816Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-27T00:40:08.668835Z",
"modified": "2023-06-27T00:40:08.673950Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 655,
"topic": "igwn.gwalert",
"uuid": "1bb6ab4b-3bd1-41c0-99c3-1601a6af4a7b",
"title": "S230627c - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230627c/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230627c/view/"
},
"event": {
"far": 1.978269478787686e-16,
"time": "2023-06-27T01:53:37.821Z",
"group": "CBC",
"search": "AllSky",
"area_50": 171.42572703438086,
"area_90": 744.4534633023052,
"duration": null,
"pipeline": "gstlal",
"properties": {
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"HasMassGap": 0.19444764942451656,
"HasRemnant": 0.0
},
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"Terrestrial": 1.3047261049337067e-09
},
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},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-06-27T01:54:09Z",
"superevent_id": "S230627c",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-27T01:54:10.367253Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-27T01:54:10.367294Z",
"modified": "2023-06-27T01:54:10.372471Z",
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},
{
"id": 1350,
"topic": "igwn.gwalert",
"uuid": "d6c4c1f0-7785-4eee-9f6e-f22e44dd3e07",
"title": "S230719j - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
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"gracedb": "https://gracedb.ligo.org/superevents/S230719j/view/"
},
"event": {
"far": 2.04026e-05,
"time": "2023-07-19T06:37:10.477Z",
"group": "Burst",
"search": "AllSky",
"area_50": 1036.527651835791,
"area_90": 4793.835478034884,
"duration": 0.047798,
"pipeline": "CWB",
"properties": {},
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"skymap_hash": "96418013157ec1eb6beab5d2d03423ad",
"classification": {},
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"central_frequency": 916.520996
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-07-19T06:44:38Z",
"superevent_id": "S230719j",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-19T06:44:39.526067Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-19T06:44:39.526099Z",
"modified": "2023-07-19T06:44:39.531529Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 670,
"topic": "hermes.message",
"uuid": "3a2c4b90-cf82-41dd-bb95-f0050d5411c2",
"title": "INTEGRAL follow-up of S230627v",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230627v at 2023-06-27T05:42:27.000\n\n\nSPI-ACS excesses:\nat T0+266.41 FAP = 0.619\nat T0+-93.99 FAP = 0.815\nat T0+-10.82 FAP = 0.828\nat T0+22.71 FAP = 0.867\n\n\n\n\nnext break in data in 40 hr: 2023-06-28T22:05:52, for 9.3 hr",
"published": "2023-06-27T05:54:52.425453Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-27T05:54:52.425486Z",
"modified": "2023-06-27T05:54:52.431592Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 671,
"topic": "igwn.gwalert",
"uuid": "4c390a9a-85da-47f2-a3b9-81ceb86c5547",
"title": "S230627aa - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230627aa/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230627aa/view/"
},
"event": {
"far": 4.71114e-06,
"time": "2023-06-27T06:47:04.588Z",
"group": "Burst",
"search": "BBH",
"area_50": 161.98367352575522,
"area_90": 1581.2292275778389,
"duration": 0.014496,
"pipeline": "CWB",
"properties": {},
"instruments": [
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],
"significant": false,
"skymap_hash": "6d2767d201b0373df463981c1da63443",
"classification": {},
"skymap_version": 0,
"central_frequency": 39.814644
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-06-27T06:48:10Z",
"superevent_id": "S230627aa",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-27T06:48:11.116633Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-27T06:48:11.116658Z",
"modified": "2023-06-27T06:48:11.121741Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 672,
"topic": "igwn.gwalert",
"uuid": "c8ad01c6-ddd1-4ec6-b785-0938d6a137c4",
"title": "S230627aa - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230627aa/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230627aa/view/"
},
"event": {
"far": 4.71114e-06,
"time": "2023-06-27T06:47:04.588Z",
"group": "Burst",
"search": "BBH",
"area_50": 161.98367352575522,
"area_90": 1581.2292275778389,
"duration": 0.014496,
"pipeline": "CWB",
"properties": {},
"instruments": [
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],
"significant": false,
"skymap_hash": "6d2767d201b0373df463981c1da63443",
"classification": {},
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"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-06-27T06:52:43Z",
"superevent_id": "S230627aa",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-27T06:52:44.666250Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-27T06:52:44.666274Z",
"modified": "2023-06-27T06:52:44.671307Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 673,
"topic": "hermes.message",
"uuid": "c70283e4-4f42-4364-bb45-30335d626f9b",
"title": "INTEGRAL follow-up of S230627aa",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230627aa at 2023-06-27T06:47:04.000\n\n\nSPI-ACS excesses:\nat T0+-55.31 FAP = 0.089\nat T0+1.34 FAP = 0.183\nat T0+-91.39 FAP = 0.31\nat T0+86.19 FAP = 0.682\nat T0+6.19 FAP = 0.91\nat T0+-142.61 FAP = 0.993\n\n\n\n\nnext break in data in 39 hr: 2023-06-28T22:05:52, for 9.3 hr",
"published": "2023-06-27T06:59:25.635019Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-27T06:59:25.635038Z",
"modified": "2023-06-27T06:59:25.640235Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1351,
"topic": "hermes.message",
"uuid": "aee328c7-effb-4a49-ac44-69bbb8268d39",
"title": "INTEGRAL follow-up of S230719j",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230719j at 2023-07-19T06:37:10.000\n\n\nSPI-ACS excesses:\nat T0+-254.83 FAP = 0.196\nat T0+-30.08 FAP = 0.51\nat T0+-189.53 FAP = 0.525\nat T0+64.39 FAP = 0.56\nat T0+-58.01 FAP = 0.998\n\n\n\n\nnext break in data in 21 hr: 2023-07-20T03:48:12, for 10 hr",
"published": "2023-07-19T06:49:44.252034Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-07-19T06:49:44.252050Z",
"modified": "2023-07-19T06:49:44.257056Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2720,
"topic": "gcn.circular",
"uuid": "10b3fdef-a4b6-44e0-b359-c1d526520e56",
"title": "Fermi trigger No 715552087: 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 23:30:45 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "34621",
"subject": "Fermi trigger No 715552087: 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-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB230904.85 (trigger No 715552087,07h 14m 21.60s , +65d 57m 36.0s, R\u0013.97) errorbox 9738 sec after notice time and 9773 sec after trigger time at 2023-09-04 23:10:55 UT, with upper limit up to 16.3 mag. The observations began at zenith distance = 67 deg. The sun altitude is -32.8 deg.\n\nThe galactic latitude b = 27 deg., longitude l = 150 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"65751\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 9863 | 2023-09-04 23:10:55 | MASTER-Kislovodsk | (08h 30m 28.45s , +55d 14m 59.3s) | C | 180 | 15.3 |\n 9863 | 2023-09-04 23:10:55 | MASTER-Kislovodsk | (08h 37m 13.04s , +54d 51m 04.2s) | C | 180 | 16.0 |\n 10043 | 2023-09-04 23:10:55 | MASTER-Kislovodsk | (08h 37m 13.70s , +54d 50m 25.9s) | C | 540 | 15.1 | Coadd\n 10064 | 2023-09-04 23:14:16 | MASTER-Kislovodsk | (08h 30m 21.79s , +55d 14m 04.7s) | C | 180 | 14.6 |\n 10064 | 2023-09-04 23:14:16 | MASTER-Kislovodsk | (08h 37m 06.30s , +54d 50m 09.7s) | C | 180 | 15.6 |\n 10265 | 2023-09-04 23:17:36 | MASTER-Kislovodsk | (08h 37m 13.69s , +54d 50m 25.8s) | C | 180 | 16.2 |\n 10265 | 2023-09-04 23:17:36 | MASTER-Kislovodsk | (08h 30m 29.11s , +55d 14m 20.3s) | C | 180 | 15.3 |\n 10465 | 2023-09-04 23:20:57 | MASTER-Kislovodsk | (08h 30m 26.28s , +55d 15m 53.0s) | C | 180 | 15.0 |\n 10465 | 2023-09-04 23:20:57 | MASTER-Kislovodsk | (08h 37m 11.30s , +54d 51m 59.1s) | C | 180 | 16.3 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkzODcwMjUwLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.Xw4-0lPtun_Ocq3HhozlZTXGz4Jq2_LJxevyLyIvJt4\n\n",
"published": "2023-09-04T23:30:58.377610Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-09-04T23:30:58.377628Z",
"modified": "2023-09-04T23:30:58.381519Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9048,
"topic": "lvk-users.beccatest",
"uuid": "4416b0d1-13e3-4fc7-8072-3c3e19b094ae",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"V1"
],
"time": [
1400505700
],
"range": 50.533049147383636
},
"message_text": "",
"published": "2024-05-23T13:21:46.742005Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T13:21:46.742027Z",
"modified": "2024-05-23T13:21:46.742035Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 661,
"topic": "gcn.circular",
"uuid": "2d3a7b19-c630-44d8-b701-353442b1c341",
"title": "LIGO/Virgo/KAGRA S230627c: Updated Sky localization and EM Bright Classification",
"submitter": "Hop gcn.circular",
"authors": "jgolomb@caltech.edu",
"data": {
"date": "23/06/27 04:37:12 GMT",
"from": "jgolomb@caltech.edu",
"title": "GCN CIRCULAR",
"number": "34087",
"subject": "LIGO/Virgo/KAGRA S230627c: 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 S230627c (GCN Circular 34086). 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/S230627c\n\nBased on posterior support from parameter estimation [1], under the assumption that the candidate S230627c 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 any one of the binary components lie between 3 to 5 solar mass (HasMassgap) is 26%.\n\nFor the Bilby.multiorder.fits,0 sky map, the 90% credible region is 82 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 291 +/- 64 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, 1 (2020)\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3ODQwNjM4LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.N8oEU4EHKSYMTLz-DGCXjxWYTKLfRxB1aD3W-F70j3I\n\n",
"published": "2023-06-27T04:37:23.533380Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-27T04:37:23.533399Z",
"modified": "2023-06-27T04:37:23.539145Z",
"nonlocalizedevents": [
{
"event_id": "S230627c"
}
],
"targets": []
},
{
"id": 662,
"topic": "igwn.gwalert",
"uuid": "0f33f13d-f8d8-4b24-a463-1f1609db8605",
"title": "S230627m - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230627m/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230627m/view/"
},
"event": {
"far": 3.55524e-06,
"time": "2023-06-27T04:54:07.939Z",
"group": "Burst",
"search": "BBH",
"area_50": 2239.2354454233932,
"area_90": 6451.650250738241,
"duration": 0.016618,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "eb4bbeee7b2c2cfab638ad0012272e64",
"classification": {},
"skymap_version": 0,
"central_frequency": 39.56488
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-06-27T04:56:46Z",
"superevent_id": "S230627m",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-27T04:56:48.030307Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-27T04:56:48.030331Z",
"modified": "2023-06-27T04:56:48.035235Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 663,
"topic": "igwn.gwalert",
"uuid": "50d442f7-d65a-49b2-884e-1b2dc5603c4b",
"title": "S230627m - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230627m/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230627m/view/"
},
"event": {
"far": 3.55524e-06,
"time": "2023-06-27T04:54:07.939Z",
"group": "Burst",
"search": "BBH",
"area_50": 2239.2354454233932,
"area_90": 6451.650250738241,
"duration": 0.016618,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "eb4bbeee7b2c2cfab638ad0012272e64",
"classification": {},
"skymap_version": 0,
"central_frequency": 39.56488
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-06-27T05:01:20Z",
"superevent_id": "S230627m",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-27T05:01:21.627006Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-27T05:01:21.627031Z",
"modified": "2023-06-27T05:01:21.631999Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 664,
"topic": "hermes.message",
"uuid": "cc5c4510-ede5-4186-aa44-5db0cbd35488",
"title": "INTEGRAL follow-up of S230627m",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230627m at 2023-06-27T04:54:07.000\n\n\nSPI-ACS excesses:\nat T0+116.46 FAP = 0.128\nat T0+-43.77 FAP = 0.268\nat T0+-3.17 FAP = 0.355\nat T0+62.91 FAP = 0.543\nat T0+103.66 FAP = 0.65\n\n\n\n\nnext break in data in 41 hr: 2023-06-28T22:05:52, for 9.3 hr",
"published": "2023-06-27T05:06:28.239652Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-27T05:06:28.239671Z",
"modified": "2023-06-27T05:06:28.245093Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 665,
"topic": "igwn.gwalert",
"uuid": "54228a8f-7e6a-4b3f-a518-7aa4d33d9339",
"title": "S230627o - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230627o/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230627o/view/"
},
"event": {
"far": 1.4899e-05,
"time": "2023-06-27T05:20:26.524Z",
"group": "Burst",
"search": "BBH",
"area_50": 1883.3749398538582,
"area_90": 5590.534970751583,
"duration": 0.007729,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "840525b76fbe4ad7500fde0589cb437b",
"classification": {},
"skymap_version": 0,
"central_frequency": 131.807678
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-06-27T05:21:52Z",
"superevent_id": "S230627o",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-27T05:21:54.117927Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-27T05:21:54.117952Z",
"modified": "2023-06-27T05:21:54.123219Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 666,
"topic": "igwn.gwalert",
"uuid": "628f01d4-5ec0-4311-8d4d-b68f019d9065",
"title": "S230627o - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230627o/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230627o/view/"
},
"event": {
"far": 1.4899e-05,
"time": "2023-06-27T05:20:26.524Z",
"group": "Burst",
"search": "BBH",
"area_50": 1883.3749398538582,
"area_90": 5590.534970751583,
"duration": 0.007729,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "840525b76fbe4ad7500fde0589cb437b",
"classification": {},
"skymap_version": 0,
"central_frequency": 131.807678
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-06-27T05:26:26Z",
"superevent_id": "S230627o",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-27T05:26:27.805953Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-27T05:26:27.806003Z",
"modified": "2023-06-27T05:26:27.812249Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 667,
"topic": "hermes.message",
"uuid": "7f183232-3e06-4dd7-8115-15c0e96f027e",
"title": "INTEGRAL follow-up of S230627o",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230627o at 2023-06-27T05:20:26.000\n\n\nSPI-ACS excesses:\nat T0+1.53 FAP = 0.005\nat T0+-5.42 FAP = 0.048\nat T0+-1.44 FAP = 0.202\nat T0+36.43 FAP = 0.285\nat T0+-82.44 FAP = 0.297\nat T0+-174.57 FAP = 0.494\nat T0+67.51 FAP = 0.501\nat T0+5.48 FAP = 0.865\nat T0+159.68 FAP = 0.929\n\n\n\n\nnext break in data in 41 hr: 2023-06-28T22:05:52, for 9.3 hr",
"published": "2023-06-27T05:32:49.628682Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-27T05:32:49.628712Z",
"modified": "2023-06-27T05:32:49.634235Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2641,
"topic": "igwn.gwalert",
"uuid": "1b08258d-6754-4d50-aadf-0c3cc1d2db9f",
"title": "S230901ae - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230901ae/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230901ae/view/"
},
"event": {
"far": 2.447562672301823e-06,
"time": "2023-09-01T09:53:37.790Z",
"group": "CBC",
"search": "AllSky",
"area_50": 638.4926405943953,
"area_90": 2878.7772030743026,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 0.8299215549800518,
"HasMassGap": 0.004218181818181818,
"HasRemnant": 0.006992702742372869
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "d4cae4a7db7b1a2ee6b55609650db8f5",
"classification": {
"BBH": 0.004627455798317085,
"BNS": 0.0,
"NSBH": 0.010099151963986315,
"Terrestrial": 0.9852733922376966
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-09-01T09:54:03Z",
"superevent_id": "S230901ae",
"external_coinc": null
},
"message_text": "",
"published": "2023-09-01T09:54:04.440053Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-09-01T09:54:04.440083Z",
"modified": "2023-09-01T09:54:04.444954Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 677,
"topic": "gcn.circular",
"uuid": "21090d6a-52f2-4f75-a1a4-9f4dc9c627bb",
"title": "LIGO/Virgo/KAGRA S230627c: Coverage and upper limits from MAXI/GSC observations",
"submitter": "Hop gcn.circular",
"authors": "Motoko Serino at Aoyama Gakuin U. <serino@phys.aoyama.ac.jp>",
"data": {
"date": "23/06/27 08:50:43 GMT",
"from": "Motoko Serino at Aoyama Gakuin U. <serino@phys.aoyama.ac.jp>",
"title": "GCN CIRCULAR",
"number": "34088",
"subject": "LIGO/Virgo/KAGRA S230627c: Coverage and upper limits from MAXI/GSC observations"
},
"message_text": "N. Kawai (RIKEN), H. Negoro, M. Nakajima (Nihon U.),\nT. Mihara (RIKEN),\nS. Sugita, M. Serino, H. Hiramatsu, H. Nishikawa (AGU),\nY. Kawakubo (LSU)\nreport on behalf of the MAXI team:\n\nWe examined MAXI/GSC all-sky X-ray images (2-20 keV)\nafter compact binary merger candidate S230627c at 2023-06-27 01:53:37.819 UTC (GCN 34086).\n\nAt the trigger time of S230627c, the high-voltage of MAXI/GSC was on.\nThe instantaneous field of view of GSC at the GW trigger time covered 5% of the 90% credible region\nof the bayestar sky map, in which we found no significant new X-ray source.\nThe first one-orbit (92 min) scan observation with GSC after the event covered 64%\nof the 90% credible region of the bayestar skymap from 01:53:37 to 03:25:36 UTC (T0+0 to T0+5519 sec).\n\nNo significant new source was found in the region in the one-orbit scan observation.\nBecause the 90% credible region of this event was observed by degraded camera,\na typical 1-sigma averaged upper limit obtained in one scan observation\nis 140 mCrab at 2-20 keV.\n\nIf you require information about X-ray flux by MAXI/GSC at specific coordinates,\nplease contact the submitter of this circular by email.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3ODU1ODQ5LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.JWTowu-ZXreOOr2U3W7T823TQeWEhv-7c2bD8tKOXoo\n\n",
"published": "2023-06-27T08:50:54.795533Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-27T08:50:54.795553Z",
"modified": "2023-06-27T08:50:54.804132Z",
"nonlocalizedevents": [
{
"event_id": "S230627c"
}
],
"targets": []
},
{
"id": 678,
"topic": "igwn.gwalert",
"uuid": "b28d03a4-d156-461d-9afb-ac8dd34cceeb",
"title": "S230627am - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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{
"id": 679,
"topic": "igwn.gwalert",
"uuid": "f5432a25-7d0f-4537-bf70-fad70cfaf3f3",
"title": "S230627am - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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{
"id": 680,
"topic": "hermes.message",
"uuid": "e39fe940-28a9-4b0d-be17-0835b4a4e9c6",
"title": "INTEGRAL follow-up of S230627am",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230627am at 2023-06-27T08:53:42.000\n\n\nSPI-ACS excesses:\nat T0+-2.21 FAP = 0.041\nat T0+-126.88 FAP = 0.099\nat T0+-5.11 FAP = 0.122\nat T0+194.12 FAP = 0.224\nat T0+-21.98 FAP = 0.344\nat T0+63.87 FAP = 0.359\nat T0+16.72 FAP = 0.594\n\n\n\n\nnext break in data in 37 hr: 2023-06-28T22:05:52, for 9.3 hr",
"published": "2023-06-27T09:06:22.771048Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-27T09:06:22.771068Z",
"modified": "2023-06-27T09:06:22.776153Z",
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{
"id": 681,
"topic": "gcn.circular",
"uuid": "1dd39f88-6bed-412c-bf4e-64b5c23eef5c",
"title": "LIGO/Virgo/KAGRA S230627c: Zwicky Transient Facility observations and candidates",
"submitter": "Hop gcn.circular",
"authors": "akashjanaki98@gmail.com",
"data": {
"date": "23/06/27 09:08:46 GMT",
"from": "akashjanaki98@gmail.com",
"title": "GCN CIRCULAR",
"number": "34089",
"subject": "LIGO/Virgo/KAGRA S230627c: Zwicky Transient Facility observations and candidates"
},
"message_text": "Akash Anumarlapudi (UWM), Tomas Ahumada (CIT), Mansi Kasliwal (CIT), Viraj Karambelkar (CIT), Harsh Kumar (IITB), Theophile du Laz (CIT), Simeon Reusch (DESY), Anirudh Salgundi (IITB), Robert Stein (CIT), Vishwajeet Swain (IITB), Gaurav Waratkar (IITB), Avery Wold (IPAC), Shreya Anand (CIT), Igor Andreoni (UMD), Eric Bellm (UW), Varun Bhalerao (IITB), Brad Cenko (UMD), Michael Coughlin (UMN), Brian Healy (UMN), David Kaplan (UWM), Jannis Necker (DESY), D. Perley (LJMU) report on behalf of the ZTF and GROWTH collaborations:\n\nWe observed the localization region of the LVK trigger S230627c (GCN 34086) with the Palomar 48-inch telescope equipped with the 47 square-degree Zwicky Transient Facility (ZTF) camera (Graham et al., 2019; Bellm et al., 2019). We obtained images in the g- and r-bands of the Bilby map (GCN 34087) beginning at ~2.2 hours after the LVK trigger time, covering 78.3% (105.3 sq deg) of the probability enclosed in the localization region.\n\nWe queried the ZTF alert stream using Kowalski (Duev et al. 2019) through Fritz (Coughlin et al. 2023), emgwcave (Karambelkar et al. in prep), AMPEL (Nordin et al. 2019), and ZTFReST (Andreoni & Coughlin et al., 2021). We required at least 2 detections separated by at least 15 minutes to select against moving objects. Furthermore, we cross-match our candidates with the Minor Planet Center to flag known asteroids, reject stellar sources (Tachibana and Miller 2018), and apply machine learning algorithms (Mahabal et al. 2019). We require that no spatially coincident ZTF alerts were issued before the detection time of the LVK trigger. We also run forced photometry on ZTF images (Masci et al. 2019) and ATLAS images (Tonry et al. 2018, Smith et al. 2020) and require no detections before the LVK trigger.\n\nFour sources passed our criteria and are inside the 95% error region:\n\n+--------------------------------------------------------------------------------+\n| ZTF Name | IAU Name | RA (deg) | DEC (deg) | Filter | Mag | MagErr |\n+--------------------------------------------------------------------------------+\n| ZTF23aaptsuy | AT2023lxu | 160.2019569 | +41.9681656 | r | 20.20 | 0.08 |\n| ZTF23aapttaw | AT2023lxt | 164.6898146 | +60.9545924 | r | 21.11 | 0.20 |\n| ZTF23aaptudb | AT2023lxs | 166.5566080 | +78.5596361 | r | 20.86 | 0.16 |\n| ZTF23aaptusa | AT2023lxx | 162.0445716 | +71.8414115 | g | 20.89 | 0.19 |\n+--------------------------------------------------------------------------------+\n\nZTF23aaptsuy (AT2023lxu) is 2.7'' away from a WISE galaxy WISEA J104048.69+415805.3 with a spectroscopic redshift of z=0.092961 (luminosity distance of 440 Mpc assuming Planck+18 cosmology) which is at the edge of the 3-sigma boundary of the LVK line of sight distance estimate.\n\nZTF23aaptudb (AT2023lxs) is 0.07'' away from a galaxy that has a Legacy Survey DR8 (LS; Duncan, 2022) photometric redshift of photo-z = 0.118±0.07, which suggests that it might not be associated with the LVK trigger.\n\nZTF23aaptusa (AT2023lxx) is 0.75'' away from a galaxy that has an LS photometric redshift of photo-z = 0.175±0.044, suggesting that it might not be associated with the LVK trigger. We also caution that the centroid position shows a slight dispersion in the three detections. \n\nZTF23aapttaw (AT2023lxt) is 0.236'' away from an LS source with a photo-z = 0.254±0.12, outside of the LVK volume.\n\n\nFurther follow-up of these candidates will continue.\n\nZTF and GROWTH are worldwide collaborations comprising Caltech, USA; IPAC, USA, WIS, Israel; OKC, Sweden; JSI/UMd, USA; U Washington, USA; DESY, Germany; MOST, Taiwan; UW Milwaukee, USA; LANL USA; Tokyo Tech, Japan; IITB, India; IIA, India; LJMU, UK; TTU, USA; SDSU, USA and USyd, Australia. ZTF acknowledges the generous support of the NSF under AST MSIP Grant No 1440341. GROWTH acknowledges the generous support of the NSF under PIRE Grant No 1545949. Alert distribution service provided by DIRAC@UW (Patterson et al. 2019). Alert database searches are done by AMPEL (Nordin et al. 2019) and Kowalski (Duev et al. 2019). GROWTH India telescope is located at the Indian Astronomical Observatory (Hanle), operated by the Indian Institute of Astrophysics (IIA). GROWTH-India project is supported by SERB and administered by IUSSTF, under grant number IUSSTF/PIRE Program/GROWTH/2015-16 and IUCAA.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3ODU2OTMyLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.hJCQ3WoLdT4TfYxL1Uj48F3SS4JO_KG5RSMmzczHFIE\n\n",
"published": "2023-06-27T09:08:58.130352Z",
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"retracted": false,
"created": "2023-06-27T09:08:58.130372Z",
"modified": "2023-06-27T09:08:58.135201Z",
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}
],
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{
"id": 682,
"topic": "igwn.gwalert",
"uuid": "d8296422-667f-46f6-8901-be76a76eeb7b",
"title": "S230627ax - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"published": "2023-06-27T11:42:10.527598Z",
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"retracted": false,
"created": "2023-06-27T11:42:10.527623Z",
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{
"id": 1621,
"topic": "igwn.gwalert",
"uuid": "f5124a55-48a8-40eb-889a-a498b9f7e1ee",
"title": "S230729t - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"published": "2023-07-29T06:56:27.734926Z",
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{
"id": 1182,
"topic": "igwn.gwalert",
"uuid": "e91dc38e-93f4-4294-af2e-c35579051b5a",
"title": "S230713b - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"time": "2023-07-13T01:10:50.355Z",
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"time_created": "2023-07-13T01:14:37Z",
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"published": "2023-07-13T01:14:38.079320Z",
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"retracted": false,
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{
"id": 683,
"topic": "igwn.gwalert",
"uuid": "ddae90b0-6129-4d30-8202-828aa186325e",
"title": "S230627ax - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"duration": null,
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"BNS": 1.0258339866810433e-15,
"NSBH": 6.781270445198372e-14,
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"sequence_num": 2,
"time_created": "2023-06-27T11:46:43Z",
"superevent_id": "S230627ax",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-27T11:46:45.123437Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-27T11:46:45.123461Z",
"modified": "2023-06-27T11:46:45.129801Z",
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{
"id": 684,
"topic": "hermes.message",
"uuid": "6105c2c3-7975-40dd-a57a-9d70a16e2de0",
"title": "INTEGRAL follow-up of S230627ax",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230627ax at 2023-06-27T11:41:38.000\n\n\nSPI-ACS excesses:\nat T0+-4.1 FAP = 0.19\nat T0+25.53 FAP = 0.213\n\n\n\n\nnext break in data in 34 hr: 2023-06-28T22:05:52, for 9.3 hr",
"published": "2023-06-27T11:54:02.071929Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-27T11:54:02.071948Z",
"modified": "2023-06-27T11:54:02.077009Z",
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},
{
"id": 685,
"topic": "igwn.gwalert",
"uuid": "27d8e902-5a57-4754-b5be-0d75b30f9a59",
"title": "S230627ay - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"sequence_num": 1,
"time_created": "2023-06-27T12:09:25Z",
"superevent_id": "S230627ay",
"external_coinc": null
},
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"published": "2023-06-27T12:09:26.924306Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-27T12:09:26.924332Z",
"modified": "2023-06-27T12:09:26.929360Z",
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"targets": []
},
{
"id": 686,
"topic": "igwn.gwalert",
"uuid": "9e7196b4-fa71-4508-81b2-777a37258334",
"title": "S230627ay - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"group": "CBC",
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"duration": null,
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"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-06-27T12:14:03Z",
"superevent_id": "S230627ay",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-27T12:14:04.673014Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-27T12:14:04.673052Z",
"modified": "2023-06-27T12:14:04.678415Z",
"nonlocalizedevents": [],
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},
{
"id": 687,
"topic": "hermes.message",
"uuid": "eec03c1a-c4af-4407-b54c-9c5468e6d110",
"title": "INTEGRAL follow-up of S230627ay",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230627ay at 2023-06-27T12:09:01.000\n\n\nSPI-ACS excesses:\nat T0+-17.67 FAP = 0.055\nat T0+68.15 FAP = 0.064\nat T0+-3.35 FAP = 0.069\nat T0+1.43 FAP = 0.342\nat T0+-150.97 FAP = 0.426\nat T0+3.9 FAP = 0.806\n\n\n\n\nnext break in data in 34 hr: 2023-06-28T22:05:52, for 9.3 hr",
"published": "2023-06-27T12:21:21.581651Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-27T12:21:21.581670Z",
"modified": "2023-06-27T12:21:21.586926Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 688,
"topic": "igwn.gwalert",
"uuid": "66c684dc-ac02-4dd3-a499-a06eee15dcbc",
"title": "S230627bc - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230627bc/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230627bc/view/"
},
"event": {
"far": 2.290674126735486e-05,
"time": "2023-06-27T13:01:38.870Z",
"group": "CBC",
"search": "AllSky",
"area_50": 892.3789682707734,
"area_90": 3047.475225761747,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.8338812616196148,
"HasRemnant": 0.00022812470108821446
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "38c06893d3815af17ce09177cfc32274",
"classification": {
"BBH": 0.0,
"BNS": 0.000386982166236296,
"NSBH": 0.0006711210771295325,
"Terrestrial": 0.9989418967566341
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-06-27T13:02:11Z",
"superevent_id": "S230627bc",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-27T13:02:12.444084Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-27T13:02:12.444110Z",
"modified": "2023-06-27T13:02:12.450282Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 689,
"topic": "igwn.gwalert",
"uuid": "d8929924-d21e-4109-98f0-df02f7cbc5ea",
"title": "S230627bc - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230627bc/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230627bc/view/"
},
"event": {
"far": 2.290674126735486e-05,
"time": "2023-06-27T13:01:38.870Z",
"group": "CBC",
"search": "AllSky",
"area_50": 892.3789682707734,
"area_90": 3047.475225761747,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.8338812616196148,
"HasRemnant": 0.00022812470108821446
},
"instruments": [
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"L1"
],
"significant": false,
"skymap_hash": "38c06893d3815af17ce09177cfc32274",
"classification": {
"BBH": 0.0,
"BNS": 0.000386982166236296,
"NSBH": 0.0006711210771295325,
"Terrestrial": 0.9989418967566341
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-06-27T13:06:46Z",
"superevent_id": "S230627bc",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-27T13:06:47.044879Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-27T13:06:47.044906Z",
"modified": "2023-06-27T13:06:47.049942Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 690,
"topic": "hermes.message",
"uuid": "110c66f6-3651-45f0-a3cf-e27b8c2fddd9",
"title": "INTEGRAL follow-up of S230627bc",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230627bc at 2023-06-27T13:01:38.000\n\n\nSPI-ACS excesses:\nat T0+228.23 FAP = 0.115\nat T0+148.2 FAP = 0.156\nat T0+-7.15 FAP = 0.156\nat T0+276.98 FAP = 0.559\nat T0+161.8 FAP = 0.571\nat T0+-29.65 FAP = 0.597\nat T0+-115.97 FAP = 0.654\n\n\n\n\nnext break in data in 33 hr: 2023-06-28T22:05:52, for 9.3 hr",
"published": "2023-06-27T13:14:25.293508Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-27T13:14:25.293527Z",
"modified": "2023-06-27T13:14:25.298561Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2728,
"topic": "igwn.gwalert",
"uuid": "be272ef6-798c-4300-8ac4-6eb486f97aea",
"title": "S230905r - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230905r/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230905r/view/"
},
"event": {
"far": 1.67699e-05,
"time": "2023-09-05T07:41:45.960Z",
"group": "Burst",
"search": "AllSky",
"area_50": 1497.0900396454194,
"area_90": 6851.573672681361,
"duration": 0.009815,
"pipeline": "CWB",
"properties": {},
"instruments": [
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"L1"
],
"significant": false,
"skymap_hash": "175addd947a345db89022ed1109e3dd6",
"classification": {},
"skymap_version": 0,
"central_frequency": 151.333618
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-09-05T08:44:43Z",
"superevent_id": "S230905r",
"external_coinc": null
},
"message_text": "",
"published": "2023-09-05T08:44:44.780147Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-09-05T08:44:44.780167Z",
"modified": "2023-09-05T08:44:44.783647Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 692,
"topic": "gcn.circular",
"uuid": "402b048c-f704-426e-a4ba-17b0eaf089c4",
"title": "Konus-Wind detection of GRB 230616A",
"submitter": "Hop gcn.circular",
"authors": "Y. Temiraev at Ioffe Institute <yuri.temiraev@mail.ioffe.ru>",
"data": {
"date": "23/06/27 14:50:53 GMT",
"from": "Y. Temiraev at Ioffe Institute <yuri.temiraev@mail.ioffe.ru>",
"title": "GCN CIRCULAR",
"number": "34091",
"subject": "Konus-Wind detection of GRB 230616A"
},
"message_text": "Y. Temiraev, D. Svinkin, D. Frederiks, M. Ulanov,\nA. Tsvetkova, A. Lysenko, A. Ridnaia, and T. Cline\non behalf of the Konus-Wind team, report:\n\nThe short-duration, bright GRB 230616A\n(Swift-BAT/GUANO detection: Tohuvavohu et al., GCN Circ. 33982;\nAstroSat-CZTI detection: Waratkar et al., GCN Circ. 33983;\nIPN triangulation: Kozyrev et al., GCN Circ. 34046)\ntriggered Konus-Wind at T0t278.259 s UT (20:37:58.259).\n\nThe burst light curve shows a multipeaked structure\nwhich starts at ~T0-30 ms and has a total duration of ~98 ms.\nThe emission is seen up to ~7 MeV.\n\nThe Konus-Wind light curve of this GRB is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB230616_T74278/\n\nAs observed by Konus-Wind, the burst\nhad a fluence of 9.11(-1.11,+1.13)x10^-6 erg/cm2,\nand a 16-ms peak flux, measured from T0+0.028 s,\nof 1.77(-0.32,+0.33)x10^-4 erg/cm2/s\n(both in the 20 keV - 10 MeV energy range).\n\nThe time-averaged spectrum of the burst\n(measured from T0 to T0+0.064 s)\nis best fit in the 20 keV - 7 MeV range\nby a power law with exponential cutoff model:\ndN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)\nwith alpha = -0.38(-0.15,+0.17)\nand Ep = 1725(-257,+286) keV (chi2 = 63/55 dof).\nFitting by a GRB (Band) model yields the same alpha and Ep,\nand an upper limit on the high energy photon index: beta < -2.7\n(chi2 = 63/54 dof).\n\nAll the quoted errors are at the 90% confidence level.\nAll the quoted values are preliminary.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3ODc3NDU5LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.F2mtDKkIZf6gtZmqSm62n4Vnro5MVm_DLJ64tMTi0lw\n\n",
"published": "2023-06-27T14:51:09.071130Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-27T14:51:09.071150Z",
"modified": "2023-06-27T14:51:09.076573Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 693,
"topic": "gcn.circular",
"uuid": "dc108d28-cdec-4c6c-8895-005c1c7d7be6",
"title": "LIGO/Virgo/Kagra S230627c: NED Galaxies in the Localization Volume",
"submitter": "Hop gcn.circular",
"authors": "David Cook at Caltech/IPAC-NED <dcook@ipac.caltech.edu>",
"data": {
"date": "23/06/27 16:14:41 GMT",
"from": "David Cook at Caltech/IPAC-NED <dcook@ipac.caltech.edu>",
"title": "GCN CIRCULAR",
"number": "34092",
"subject": "LIGO/Virgo/Kagra S230627c: NED Galaxies in the Localization Volume"
},
"message_text": "David O. Cook (Caltech/IPAC), Rick Ebert (Caltech/IPAC), George Helou (Caltech/IPAC), Joseph M. Mazzarella (Caltech/IPAC), Marion Schmitz (Caltech/IPAC), and Leo Singer (NASA/GSFC)\nOn behalf of the NASA/IPAC Extragalactic Database (NED) Team.\n\nWe spatially cross-matched the LVK S230627c-4-Update sky localization with the NED Local Volume Sample (NED-LVS; Cook et al. 2023), which is a subset of NED with a redshift or redshift-independent distance less than 1000 Mpc. We find 2531 galaxies within the 90% containment volume, and we list here the top 20 galaxies located in the 90% volume sorted by the joint probability of the 3D localization and the WISE W1 luminosity (an observable proxy for stellar mass). For the full list of galaxies in the 90% volume go to the NED Gravitational Wave Followup service (https://ned.ipac.caltech.edu/uri/NED::GWF/).\n\nThe NED-GWF service provides downloadable galaxy lists and visualizations for candidate host galaxies. For each GW alert, these products are automatically generated and made available within minutes to expedite efficient electromagnetic followup observations. The NED top 20 list is sorted by the joint probability of the 3D localization and the WISE W1 luminosity, but users can sort on additional pre-computed prioritization metrics (star formation rate, P_3D*P_SFR; and specific star formation rate, P_3D*P_sSFR; etc.) which are available via downloading the entire galaxy list inside the event's probability volume.\n\nGalaxy RA Dec Dist m_NUV mErr m_Ks mErr m_W1 mErr P_3D P_3D_LumW1\n (Deg) (Deg) (Mpc) (AB) (mag) (Vega) (mag) (Vega) (mag) (Prob) (Prob)\n--------------------------------------------- ---------------- -------------- ---------- --------- --------- --------- -------- -------- -------- ------------ -------------\n WISEA J102356.11+283710.630 | 155.98380 | 28.61961 | 249.69 | 19.76 | 0.09 | 11.75 | 0.06 | 10.19 | 0.01 | 8.89e-01 | 3.83e-03\n WISEA J102356.11+283710.630 | 155.98380 | 28.61961 | 249.69 | 19.76 | 0.09 | 11.75 | 0.06 | 10.19 | 0.01 | 8.89e-01 | 3.83e-03\n WISEA J103543.86+373517.630 | 158.93274 | 37.58823 | 247.97 | nan | nan | 12.46 | 0.08 | 10.53 | 0.01 | 7.89e-01 | 2.44e-03\n WISEA J110213.02+645925.030 | 165.55424 | 64.99022 | 353.66 | 20.05 | 0.14 | 12.55 | 0.08 | 11.59 | 0.01 | 8.75e-01 | 2.09e-03\n WISEA J105943.56+650406.730 | 164.93154 | 65.06841 | 382.69 | nan | nan | 13.16 | 0.13 | 11.84 | 0.01 | 8.96e-01 | 1.98e-03\n WISEA J103213.97+401616.630 | 158.05814 | 40.27125 | 353.93 | nan | nan | 11.25 | 0.09 | 11.41 | 0.01 | 6.77e-01 | 1.91e-03\n WISEA J105410.27+544851.830 | 163.54295 | 54.81439 | 321.95 | 19.72 | 0.14 | 13.25 | 0.05 | 11.46 | 0.01 | 7.72e-01 | 1.71e-03\n MCG +09-18-04530 | 163.34551 | 56.31446 | 348.07 | nan | nan | 12.61 | 0.02 | 11.43 | 0.01 | 6.13e-01 | 1.63e-03\n WISEA J103906.07+444224.430 | 159.77528 | 44.70674 | 424.01 | 21.04 | 0.12 | 12.33 | 0.09 | 12.29 | 0.01 | 8.99e-01 | 1.62e-03\n WISEA J103626.50+444349.830 | 159.11038 | 44.73046 | 423.33 | nan | nan | 13.20 | 0.11 | 12.34 | 0.01 | 8.94e-01 | 1.53e-03\n WISEA J103228.87+400854.330 | 158.12024 | 40.14840 | 302.94 | nan | nan | 12.42 | 0.09 | 10.73 | 0.01 | 3.95e-01 | 1.52e-03\n MCG +10-15-12330 | 160.89709 | 58.10631 | 324.40 | nan | nan | 11.54 | 0.10 | 11.69 | 0.01 | 8.32e-01 | 1.52e-03\n WISEA J110213.05+661002.630 | 165.55419 | 66.16735 | 353.71 | nan | nan | 12.15 | 0.09 | 11.98 | 0.01 | 8.70e-01 | 1.45e-03\n WISEA J103141.11+360123.930 | 157.92133 | 36.02338 | 390.76 | nan | nan | 12.80 | 0.05 | 12.22 | 0.01 | 8.70e-01 | 1.42e-03\n WISEA J103151.38+355744.630 | 157.96421 | 35.96247 | 398.10 | nan | nan | 12.79 | 0.13 | 12.31 | 0.01 | 8.88e-01 | 1.38e-03\n WISEA J105404.26+544941.130 | 163.51771 | 54.82815 | 335.96 | nan | nan | 12.30 | 0.08 | 11.82 | 0.01 | 7.94e-01 | 1.38e-03\n WISEA J103626.60+444407.830 | 159.11067 | 44.73547 | 414.76 | 20.71 | 0.08 | 13.01 | 0.09 | 12.37 | 0.01 | 8.62e-01 | 1.38e-03\n WISEA J105336.54+545204.630 | 163.40236 | 54.86795 | 325.02 | nan | nan | 11.84 | 0.08 | 11.75 | 0.01 | 7.76e-01 | 1.35e-03\n WISEA J103407.92+424833.130 | 158.53304 | 42.80921 | 402.87 | nan | nan | 12.61 | 0.09 | 12.33 | 0.01 | 8.60e-01 | 1.34e-03\n MCG +09-18-04130 | 162.94749 | 55.38566 | 336.20 | nan | nan | 11.39 | 0.07 | 11.42 | 0.01 | 5.14e-01 | 1.29e-03\n WISEA J103747.36+394846.030 | 159.44730 | 39.81275 | 311.18 | 20.64 | 0.09 | 11.55 | 0.08 | 11.63 | 0.01 | 6.81e-01 | 1.21e-03\n\nTable: Top 20 galaxies in NED-LVS that fall in the 90% probability volume for S230627c sorted by the joint probability of 3D position and WISE W1 luminosity (P_3D*P_LumW1). Galaxy is the NED preferred name. RA and Dec are the Equatorial coordinates in degrees (J2000). Distance is the distance to the galaxy in Mpc. m_NUV and mErr_NUV are the apparent magnitude and error from GALEX. m_Ks and mErr_Ks are the apparent magnitude and error from 2MASS. m_W1 and mErr_W1 are the apparent magnitude and error from AllWISE. P_3D is the probability that the galaxy is in the volume given the distance of GW event. P_3D_LumW1 is the joint probability within the volume weighted by the WISE1 luminosity of the galaxy (P_3D * P_LumW1).\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3ODgyNDg3LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.xhEOfBtxNwxKi-3JQcfbaEkihDUx_3UCC7yjo3iiR-s\n\n",
"published": "2023-06-27T16:14:53.061104Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-27T16:14:53.061124Z",
"modified": "2023-06-27T16:14:53.067339Z",
"nonlocalizedevents": [
{
"event_id": "S230627c"
}
],
"targets": []
},
{
"id": 1352,
"topic": "igwn.gwalert",
"uuid": "db992cbc-032f-44fe-8d74-f30e68e1c2a3",
"title": "S230719k - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230719k/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230719k/view/"
},
"event": {
"far": 4.876288228969012e-06,
"time": "2023-07-19T07:09:08.599Z",
"group": "CBC",
"search": "AllSky",
"area_50": 1331.7491915388193,
"area_90": 4092.3958140496497,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.004106583072100313,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "4a0cf4a336f91483f71074293bc6a1bd",
"classification": {
"BBH": 0.31844641628447135,
"BNS": 4.9391581534589286e-15,
"NSBH": 3.546803675821887e-13,
"Terrestrial": 0.681553583715169
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-07-19T07:09:31Z",
"superevent_id": "S230719k",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-19T07:09:33.606646Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-19T07:09:33.606667Z",
"modified": "2023-07-19T07:09:33.614408Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1353,
"topic": "igwn.gwalert",
"uuid": "c458e159-c683-4b8c-8f19-d700293a1816",
"title": "S230719k - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230719k/files/bayestar.multiorder.fits,1",
"gracedb": "https://gracedb.ligo.org/superevents/S230719k/view/"
},
"event": {
"far": 5.349299368379265e-06,
"time": "2023-07-19T07:09:08.597Z",
"group": "CBC",
"search": "AllSky",
"area_50": 1381.2675166062781,
"area_90": 4121.771091632041,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.012106583072100312,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "4e7b513da81d4fa3fa646c51c510a401",
"classification": {
"BBH": 0.28979731430498434,
"BNS": 3.007701110272134e-15,
"NSBH": 2.1647528606890356e-13,
"Terrestrial": 0.7102026856947962
},
"skymap_version": 1,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-07-19T07:14:06Z",
"superevent_id": "S230719k",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-19T07:14:08.133208Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-19T07:14:08.133229Z",
"modified": "2023-07-19T07:14:08.138027Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1354,
"topic": "hermes.message",
"uuid": "9dc2ca9f-7145-485f-b6ea-d81a3e83855d",
"title": "INTEGRAL follow-up of S230719k",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230719k at 2023-07-19T07:09:08.000\n\n\nSPI-ACS excesses:\nat T0+-279.98 FAP = 0.031\nat T0+5.99 FAP = 0.185\nat T0+-9.61 FAP = 0.662\nat T0+-114.68 FAP = 0.973\n\n\n\n\nnext break in data in 21 hr: 2023-07-20T03:48:12, for 10 hr",
"published": "2023-07-19T07:23:51.557926Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-07-19T07:23:51.557945Z",
"modified": "2023-07-19T07:23:51.565654Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1355,
"topic": "igwn.gwalert",
"uuid": "992afdca-ce00-49c8-b51d-a91276939cdd",
"title": "S230719q - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230719q/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230719q/view/"
},
"event": {
"far": 1.507039e-05,
"time": "2023-07-19T10:46:27.597Z",
"group": "CBC",
"search": "AllSky",
"area_50": 540.0330048405602,
"area_90": 1721.1814429168007,
"duration": null,
"pipeline": "MBTA",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.0,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "e192aca79fe858861cde0460d0c6b777",
"classification": {
"BBH": 0.0,
"BNS": 0.00084082,
"NSBH": 3.5821e-05,
"Terrestrial": 0.999123359
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-07-19T10:46:59Z",
"superevent_id": "S230719q",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-19T10:46:59.970906Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-19T10:46:59.970926Z",
"modified": "2023-07-19T10:46:59.978893Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9049,
"topic": "lvk-users.beccatest",
"uuid": "d8561d02-3c83-4f2b-ab37-04c22c385084",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"H1"
],
"time": [
1400505800
],
"range": 151.51798027506072
},
"message_text": "",
"published": "2024-05-23T13:23:17.906521Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T13:23:17.906543Z",
"modified": "2024-05-23T13:23:17.906552Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 3212,
"topic": "hermes.message",
"uuid": "5ae812bd-e8f2-4656-9f74-92d4fb260b36",
"title": "INTEGRAL follow-up of S230916aq",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230916aq at 2023-09-16T10:47:51.000\n\n\nSPI-ACS excesses:\nat T0+8.68 FAP = 0.023\nat T0+-16.55 FAP = 0.322\nat T0+-185.57 FAP = 0.49\nat T0+18.13 FAP = 0.503\nat T0+-170.05 FAP = 0.808\nat T0+78.15 FAP = 0.85\nat T0+-37.55 FAP = 0.994\n\n\n\n\nnext break in data in 6.8 hr: 2023-09-16T17:33:35, for 9.3 hr",
"published": "2023-09-21T16:09:03.717150Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-09-21T16:09:03.717173Z",
"modified": "2023-09-21T16:09:03.723727Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 3213,
"topic": "hermes.message",
"uuid": "ef482491-d705-4bcf-83a6-dd1e0b262ba1",
"title": "INTEGRAL follow-up of S230823ay",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230823ay at 2023-08-23T11:26:15.000\n\n\nSPI-ACS excesses:\nat T0+-61.43 FAP = 0.143\nat T0+34.97 FAP = 0.663\nat T0+42.82 FAP = 0.74\n\n\n\n\nnext break in data in 7.5 hr: 2023-08-23T18:56:26, for 9.3 hr",
"published": "2023-09-21T16:14:23.242940Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-09-21T16:14:23.242959Z",
"modified": "2023-09-21T16:14:23.249493Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 3214,
"topic": "hermes.message",
"uuid": "d4b7c41c-43b8-4004-b514-dff35cedcf4a",
"title": "INTEGRAL follow-up of S230903bk",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230903bk at 2023-09-03T21:05:45.000\n\n\nSPI-ACS excesses:\nat T0+1.98 FAP = 0.056\nat T0+0.41 FAP = 0.057\nat T0+-9.32 FAP = 0.376\nat T0+33.13 FAP = 0.677\nat T0+63.46 FAP = 0.753\n\n\n\n\nnext break in data in 52 hr: 2023-09-06T01:04:57, for 10 hr",
"published": "2023-09-21T16:19:44.960297Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-09-21T16:19:44.960316Z",
"modified": "2023-09-21T16:19:44.967013Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9050,
"topic": "lvk-users.beccatest",
"uuid": "54366aff-8d95-4a1e-ba29-56b250887a5e",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"L1"
],
"time": [
1400505800
],
"range": 165.9790495461847
},
"message_text": "",
"published": "2024-05-23T13:23:19.921438Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T13:23:19.921459Z",
"modified": "2024-05-23T13:23:19.921467Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 695,
"topic": "gcn.circular",
"uuid": "3651cbe3-374e-4cf4-bffe-7c288c2c8b23",
"title": "GRB230626A: Fermi GBM Detection",
"submitter": "Hop gcn.circular",
"authors": "sumanbala2210@gmail.com",
"data": {
"date": "23/06/27 16:55:13 GMT",
"from": "sumanbala2210@gmail.com",
"title": "GCN CIRCULAR",
"number": "34094",
"subject": "GRB230626A: Fermi GBM Detection"
},
"message_text": "S. Bala (USRA) and C. Meegan (UAH) report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"At 14:30:22.25 UT on 26 June 2023, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB230626A (trigger 709482627/230626604).\n\nThe on-ground calculated location, using the Fermi GBM trigger data,\nis RA = 146.38, Dec = 0.09 (J2000 degrees, equivalent to\nJ2000 09h 45m, +00d 05'), with a statistical uncertainty of 1.0 degrees.\n(radius, 1-sigma containment, statistical only; there is additionally a\nsystematic error which we have characterized as a core-plus-tail model,\nwith 90% of GRBs having a 3.7 deg error and a small tail suffering a larger\nthan 10 deg systematic error [Connaughton et al. 2015, ApJS, 216, 32]).\n\nThe angle from the Fermi LAT boresight is 49 degrees.\n\nThe GBM light curve consists of two peaks (the second peak is found\nto be much brighter) with a duration (T90) of about 15 s (50-300 keV).\nThe time-averaged spectrum from T0-1.024 to T0+25.60 s is best fit by\na Band function with Epeak= 169 +/- 12 keV, alpha = -1.29 +/- 0.02\n and beta = -2.16 +/- 0.08.\n\nThe event fluence (10-1000 keV) in this time interval is\n(2.55 +/- 0.04)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+11 s in the 10-1000 keV band is 35 +/- 0.5 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog:\nhttps://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html\n\nFor Fermi GBM data and info, please visit the official Fermi GBM Support Page:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3ODg0OTE4LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.CwG52Xie8ahoms5zmjgFXxEyjgvh42avk8y0NRgETjA\n\n",
"published": "2023-06-27T16:55:23.830125Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-27T16:55:23.830145Z",
"modified": "2023-06-27T16:55:23.835725Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 696,
"topic": "gcn.circular",
"uuid": "254a0ddc-1951-4286-9dd0-63227d7ac9b5",
"title": "LIGO/Virgo/KAGRA S230627c: Upper limits from Fermi-GBM Observations",
"submitter": "Hop gcn.circular",
"authors": "Sarah Dalessi at UAH <sd0104@uah.edu>",
"data": {
"date": "23/06/27 19:14:07 GMT",
"from": "Sarah Dalessi at UAH <sd0104@uah.edu>",
"title": "GCN CIRCULAR",
"number": "34095",
"subject": "LIGO/Virgo/KAGRA S230627c: Upper limits from Fermi-GBM Observations"
},
"message_text": "S. Dalessi (UAH) reports on behalf of the Fermi-GBM Team:\n\n\nFor S230627c (GCN 34086 and GCN 34087) and using the updated Bilby skymap, Fermi-GBM was observing 99.8% of the localization probability at event time.\n\nThere was no Fermi-GBM onboard trigger around the event time of the LIGO/Virgo/KAGRA (LVK) detection of GW trigger S230627c . An automated, blind search for short gamma-ray bursts below the onboard triggering threshold in Fermi-GBM also identified no counterpart candidates. The GBM Targeted Search [1,2,3], the most sensitive, coherent search for GRB-like signals, was run from +/-30 s around merger time, and also identified no counterpart candidates.\n\nFor Fermi, part of the LVK localization region is behind the Earth, located at an RA.8, Dec=-18.5 with a radius of 67.6 degrees. We therefore set upper limits on impulsive gamma-ray emission for the GW localization region visible to Fermi at merger time. Using the representative soft, normal, and hard GRB-like templates described in arXiv:1612.02395, we set the following 3 sigma flux upper limits over 10-1000 keV, weighted by GW localization probability (in units of 10^-7 erg/s/cm^2):\n\nTimescale Soft Normal Hard\n------------------------------------\n0.128 s: 1.9 3.3 5.4\n1.024 s: 0.7 0.9 1.5\n8.192 s: 0.2 0.3 0.5\n\nAssuming the median luminosity distance of 291.0 Mpc from the GW detection, we estimate the following intrinsic luminosity upper limits over the 1 keV-10 MeV energy range (in units of 10^50 erg/s):\n\nTimescale Soft Normal Hard\n------------------------------------\n0.128s: 0.047 0.066 0.215\n1.024s: 0.015 0.019 0.060\n8.192s: 0.004 0.006 0.018\n\n[1] Blackburn et al. 2015, ApJS 217, 8\n[2] Goldstein et al. arXiv:1612.02395\n[3] Goldstein et al. arXiv:1903.12597\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3ODkzMjUzLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.fu6eZPXP16huWN3WwvktNqEDIH2hJC3uw64L0dEHBOY\n\n",
"published": "2023-06-27T19:14:18.765110Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-27T19:14:18.765130Z",
"modified": "2023-06-27T19:14:18.777594Z",
"nonlocalizedevents": [
{
"event_id": "S230627c"
}
],
"targets": []
},
{
"id": 697,
"topic": "gcn.circular",
"uuid": "2d63a238-407b-4720-94e0-29c8cb01b2f2",
"title": "LIGO/Virgo/KAGRA S230627c: ATLAS information on the ZTF candidates",
"submitter": "Hop gcn.circular",
"authors": "Michael Fulton at Queen's U, Belfast <mfulton07@qub.ac.uk>",
"data": {
"date": "23/06/27 20:11:36 GMT",
"from": "Michael Fulton at Queen's U, Belfast <mfulton07@qub.ac.uk>",
"title": "GCN CIRCULAR",
"number": "34096",
"subject": "LIGO/Virgo/KAGRA S230627c: ATLAS information on the ZTF candidates"
},
"message_text": "M. D. Fulton (QUB), S. J. Smartt (Oxford/QUB), K. W. Smith, S. Srivastav, D. R. Young, M. Nicholl, M. McCollum, T. Moore, J. Weston, X. Sheng (QUB), L. Shingles (GSI/QUB), J. Sommer (LMU/QUB), H. Stevance, L. Rhodes, A. Andersson (Oxford), L. Denneau, J. Tonry, H. Weiland, A. Lawrence, R. Siverd (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), A. Jordan, V. Suc (UAI, Obstech), A. Rest (STScI), T.-W. Chen (TUM), C. Stubbs (Harvard)\n\nHere we report the ATLAS forced photometry (Shingles et al. AstroNote #2021-7; Smith et al., 2020, PASP, 132:085002) at the coordinates of the ZTF candidates highlighted in Anumarlapudi et al. (GCN Circ. 34089). We rule out AT2023lxu and disfavour AT2023lxt as optical counterparts to the compact binary merger event S230627c (LIGO-Virgo-KAGRA Scientific Collaboration GCN Circ. 34086). \n\nWe measure multiple 3Ï detections at the location of AT2023lxu >6 days before the LVK trigger time, implying AT2023lxu is most likely a faint SN. Two 3Ï detections of AT2023lxt were made prior to the LVK trigger, suggesting this is also not a viable candidate. We note that the AT2023lxt detections are marginal, being at the observing limit of ATLAS, and we are uncertain whether or not these detections represent subtraction residuals due to the close proximity to the underlying galaxy core. We present these 3Ï measurements below, which represent nightly flux stacks and have not been corrected for foreground extinction. Phase is with respect to the LVK trigger time of MJD 60122.079 (2023-06-27 01:53:37 UTC).\n\n+----------------------+--------------+------------------+--------+---------------------+\n| Candidate Name | MJD | Phase (Days) | Filter | Mag +/- MagErr |\n+----------------------+--------------+------------------+--------+---------------------+\n| | 60106.266 | -15.812 | c | >20.84 |\n+ +--------------+------------------+--------+---------------------+\n| | 60108.262 | -13.817 | c | 20.37 +/- 0.32 |\n+ +--------------+------------------+--------+---------------------+\n| AT2023lxu | 60110.265 | -11.814 | c | 19.97 +/- 0.16 |\n+ +--------------+------------------+--------+---------------------+\n| | 60112.263 | -9.816 | c | 19.97 +/- 0.18 |\n+ +--------------+------------------+--------+---------------------+\n| | 60114.264 | -7.815 | c | >19.98 |\n+ +--------------+------------------+--------+---------------------+\n| | 60116.280 | -5.799 | c | 20.27 +/- 0.20 |\n+----------------------+--------------+------------------+--------+---------------------+\n| | 60112.262 | -9.817 | c | >20.41 |\n+ +--------------+------------------+--------+---------------------+\n| AT2023lxt | 60114.277 | -7.802 | c | 20.50 +/- 0.25 |\n+ +--------------+------------------+--------+---------------------+\n| | 60116.283 | -5.796 | c | 20.60 +/ 0.25 |\n+ +--------------+------------------+--------+---------------------+\n| | 60118.262 | -3.817 | o | >20.30 |\n+----------------------+--------------+------------------+--------+---------------------+\n\nThe Asteroid Terrestrial-impact Last Alert System (ATLAS) project is primarily funded to search for Near-Earth asteroids through NASA grants NN12AR55G, 80NSSC18K0284, and 80NSSC18K1575; byproducts of the NEO search include images and catalogs from the survey area. This work was partially funded by Kepler/K2 grant J1944/80NSSC19K0112 and HST GO-15889, and STFC grants ST/T000198/1 and ST/S006109/1. The ATLAS science products have been made possible through the contributions of the University of Hawaii Institute for Astronomy, the Queen's University Belfast, the Space Telescope Science Institute, the South African Astronomical Observatory, and The Millennium Institute of Astrophysics (MAS), Chile.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3ODk2NzAyLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.7DEp1QiHyDVTRbWJLUmDzTON2RPrR-2rgDwFevLdvJk\n\n",
"published": "2023-06-27T20:11:47.583011Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-27T20:11:47.583030Z",
"modified": "2023-06-27T20:11:47.589342Z",
"nonlocalizedevents": [
{
"event_id": "S230627c"
}
],
"targets": []
},
{
"id": 698,
"topic": "gcn.circular",
"uuid": "b5ffb71d-0969-4127-85fd-59452b490cab",
"title": "LIGO/Virgo/KAGRA S230527c: No counterpart candidates in INTEGRAL SPI-ACS prompt observation",
"submitter": "Hop gcn.circular",
"authors": "Volodymyr Savchenko at ISDC, University of Geneva; LASTRO, EPFL <volodymyr.savchenko@unige.ch>",
"data": {
"date": "23/06/27 21:17:53 GMT",
"from": "Volodymyr Savchenko at ISDC, University of Geneva; LASTRO, EPFL <volodymyr.savchenko@unige.ch>",
"title": "GCN CIRCULAR",
"number": "34097",
"subject": "LIGO/Virgo/KAGRA S230527c: No counterpart candidates in INTEGRAL SPI-ACS prompt observation"
},
"message_text": "V. Savchenko, C. Ferrigno (ISDC/UniGE, Switzerland)\nJ. Rodi (IAPS-Roma, Italy)\nA. Coleiro (APC, France)\nS. Mereghetti (INAF IASF-Milano, Italy)\n\non behalf of the INTEGRAL multi-messenger collaboration:\nhttps://www.astro.unige.ch/cdci/integral-multimessenger-collaboration\n\nUsing INTEGRAL/SPI-ACS realtime data (following [1]) we have performed a search for a prompt gamma-ray counterpart of S230527c (GCN 34086).\n\nAt the time of the event (2023-06-27 01:53:37 UTC, hereafter T0), INTEGRAL was operating in nominal mode. The peak of the event\nlocalization probability was at an angle of 94 deg with respect to the spacecraft pointing axis. This orientation implies strongly suppressed (8.9% of optimal) response of ISGRI, strongly suppressed (28% of optimal) response of IBIS/Veto, and near-optimal (81% of optimal) response of SPI-ACS.\n\nThe background within +/-300 seconds around the event was very stable (excess variance 1.2).\n\nWe have performed a search for any impulsive events in INTEGRAL SPI-ACS (as described in [2]) data.\n\nWe do not detect any significant counterparts and estimate a 3-sigma upper limit on the 75-2000 keV fluence of 1.8e-07 erg/cm^2 (within the 50% probability containment region of the source localization) for a burst lasting less than 1 s with a characteristic short GRB spectrum (an exponentially cut off power law with alpha=-0.5 and Ep`0 keV) occurring at any time in the interval within 300 s around T0. For a typical long GRB spectrum (Band function with alpha=-1, beta=-2.5, and Ep00 keV), the derived peak flux upper limit is ~1.6e-07 (5.5e-08) erg/cm^2/s at 1 s (8 s) time scale in 75-2000 keV energy range.\n\nWe report for completeness and in order of FAP, all excesses identified in the search region. We find: 1 tentatively associated\nexcess:\n\nT-T0 | scale | S/N | flux ( x 1e-06 erg/cm2/s) | FAP\n-0.221 | 2.4 | 3.4 | 1.38 +/- 0.347 +/- 0.328 | 0.00943\n\n3 likely background excesses:\n\nT-T0 | scale | S/N | flux ( x 1e-06 erg/cm2/s) | FAP\n-24.6 | 0.4 | 3.6 | 3.49 +/- 0.855 +/- 0.829 | 0.349\n-56.4 | 1 | 3.3 | 2.04 +/- 0.538 +/- 0.485 | 0.643\n277 | 0.7 | 4.7 | 3.42 +/- 0.646 +/- 0.814 | 0.728\n\nNote that FAP estimates (especially at timescales above 2s) may be possibly further affected by enhanced non-stationary local background noise. This list excludes any excesses for which FAP is close to unity.\n\nWe note that no independent IBAS alerts happened in the vicinity.\n\nSPI-ACS data can be retrieved in MMODA with this link:\nhttps://www.astro.unige.ch/mmoda/?DEC=-29.74516667&RA&5.97845833&T1 23-06-27T01%3A48%3A37.000&T2 23-06-27T01%3A58%3A37.000&T_format=isot&data_level=ordinary&instrument=spi_acs&product_type=spi_acs_lc&query_status=new&query_type=Real&time_bin=2&time_bin_format=sec\n\nINTEGRAL follow-up alert was distributed to SCIMMA through HERMES few minutes after the trigger GCN:\nhttps://hermes.lco.global/message/cc05ca0b-1c31-444d-a809-900ec95c4690\n\nAll results quoted are preliminary.\n\nThis circular is an official product of the INTEGRAL Multi-Messenger team.\n\nNote that we send GCNs Circulars only when one of the following conditions is met: merger contains at least one neutron star, a\nsingificant counterpart is reported.\n\n[1] Savchenko et al. 2017, A&A 603, A46\n[2] Savchenko et al. 2012, A&A 541A, 122S\n\nGCN pipeline version: local\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3OTAwNjc5LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.UurtsoqDpiIkVb5N1V5NCE9cpezxIhXKnMjJgTfF_L0\n\n",
"published": "2023-06-27T21:18:05.207381Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-27T21:18:05.207401Z",
"modified": "2023-06-27T21:18:05.215056Z",
"nonlocalizedevents": [
{
"event_id": "S230527c"
}
],
"targets": []
},
{
"id": 699,
"topic": "gcn.circular",
"uuid": "e99bb96d-7dc5-458f-8475-b22386dc18c5",
"title": "AT2023lcr: JCMT SCUBA-2 sub-mm observations",
"submitter": "Hop gcn.circular",
"authors": "Ian Smith at Rice U <ian.smith.astronomy@gmail.com>",
"data": {
"date": "23/06/27 21:34:27 GMT",
"from": "Ian Smith at Rice U <ian.smith.astronomy@gmail.com>",
"title": "GCN CIRCULAR",
"number": "34098",
"subject": "AT2023lcr: JCMT SCUBA-2 sub-mm observations"
},
"message_text": "I.A. Smith (U. Hawaii), D.A. Perley (LJMU), and N.R. Tanvir\n(U. of Leicester) report:\n\nWe have been observing the location of the transient AT2023lcr\n(Swain et al. GCN Circ. 34022; Fulton et al. GCN Circ. 34042)\nusing the SCUBA-2 sub-millimeter continuum camera on the James\nClerk Maxwell Telescope. No counterpart has been detected in\nthe individual night or combined maps. Combining all the data,\nthe RMS background noise was 1.7 mJy/beam at 850 microns and\n30.1 mJy/beam at 450 microns; the mid-point of the run was at\n2023-06-23.738 UT.\n\nWe thank Andrea Waiters, Harold Pena, and the JCMT staff for\nthe prompt support of these observations that were taken under\nproject M23AP018.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3OTAxNjczLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.X_5MOMryFWAg-aP0e9DlEVTfWEvimeHLL3J-T9Xb1gc\n\n",
"published": "2023-06-27T21:34:39.090088Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-27T21:34:39.090109Z",
"modified": "2023-06-27T21:34:39.266966Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 700,
"topic": "gcn.circular",
"uuid": "3475bd0a-bc8f-47df-b096-9ad95b9e6b05",
"title": "GRB 230626A: GRBAlpha detection",
"submitter": "Hop gcn.circular",
"authors": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"data": {
"date": "23/06/27 21:47:24 GMT",
"from": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"title": "GCN CIRCULAR",
"number": "34099",
"subject": "GRB 230626A: GRBAlpha detection"
},
"message_text": "M. Dafcikova, J. Ripa (Masaryk U.), A. Pal (Konkoly Observatory), N. Werner (Masaryk U.), M. Ohno, H. Takahashi (Hiroshima U.), L. Meszaros, B. Csak (Konkoly Observatory), N. Husarikova, F. Munz , M. Topinka, M. Kolar, J.-P. Breuer, F. Hroch (Masaryk U.), T. Urbanec, M. Kasal, A. Povalac (Brno U. of Technology), J. Hudec, J. Kapus, M. Frajt (Spacemanic s.r.o), R. Laszlo, M. Koleda (Needronix s.r.o), M. Smelko, P. Hanak, P. Lipovsky (Technical U. of Kosice), G. Galgoczi (Wigner Research Center/Eotvos U.), Y. Uchida, H. Poon, H. Matake (Hiroshima U.), N. Uchida (ISAS/JAXA), T. Bozoki (Eotvos U.), G. Dalya (Eotvos U.), yyT. Enoto (Kyoto U.), Zs. Frei (Eotvos U.), G. Friss (Eotvos U.), Y. Fukazawa, K. Hirose (Hiroshima U.), S. Hisadomi (Nagoya U.), Y. Ichinohe (Rikkyo U.), K. Kapas (Eotvos U.), L. L. Kiss (Konkoly Observatory), T. Mizuno (Hiroshima U.), K. Nakazawa (Nagoya U.), H. Odaka (Univ of Tokyo), J. Takatsy (Eotvos U.), K. Torigoe (Hiroshima U.), N. Kogiso, M. Yoneyama (Osaka Metropolitan U.), M. Moritaki (U. Tokyo), T. Kano (U. Michigan) -- the GRBAlpha collaboration.\n\nThe long-duration GRB 230626A (Fermi/GBM detection: GCN 34094; GECAM-B detection: trigger no. 198; Konus/Wind detection at 2023-06-26 14:30:27.440 UT) was observed by the GRBAlpha 1U CubeSat (Pal et al. 2023; arXiv:2302.10048).\n\nThe detection was confirmed at the peak time 2023-06-26 14:30:29 UTC. The T90 duration measured by GRBAlpha is 14 s and the overall significance during T90 reaches 19 sigma.\n\nThe light curve obtained by GRBAlpha is available here: https://grbalpha.konkoly.hu/static/share/GRB230626A_GCN.pdf\n\nAll GRBAlpha detections are listed at: https://monoceros.physics.muni.cz/hea/GRBAlpha/ \nGRBAlpha, launched on 2021 March 22, is a demonstration mission for a future CubeSat constellation (Werner et al. Proc. SPIE 2018). The detector of GRBAlpha consists of a 75 x 75 x 5 mm3 CsI scintillator read out by a SiPM array, covering the energy range from ~50 keV to ~1000 keV. To increase the duty cycle and the downlink rate, the upgrade of the on-board data acquisition software stack is in progress. The ground segment is also supported by the radio amateur community and it takes advantage of the SatNOGS network for increased data downlink volume. \n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3OTAyNDUwLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.KNPV0-3VIMBXPHHNv-a1kr7rxEixNOpo_PyGgC3sm4I\n\n",
"published": "2023-06-27T21:47:35.728797Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-27T21:47:35.728818Z",
"modified": "2023-06-27T21:47:35.734142Z",
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"targets": []
},
{
"id": 1356,
"topic": "igwn.gwalert",
"uuid": "865167a6-d0ca-4833-b387-48eaffdee980",
"title": "S230719q - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"area_90": 1721.1814429168007,
"duration": null,
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"time_created": "2023-07-19T10:51:35Z",
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"published": "2023-07-19T10:51:36.626903Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-19T10:51:36.626923Z",
"modified": "2023-07-19T10:51:36.632575Z",
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},
{
"id": 836,
"topic": "igwn.gwalert",
"uuid": "273d4004-a504-437f-9d6d-25c6d9712fd1",
"title": "S230702bb - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"time": "2023-07-02T22:43:14.759Z",
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"time_created": "2023-07-02T22:49:17Z",
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"published": "2023-07-02T22:49:19.256862Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
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"modified": "2023-07-02T22:49:19.263090Z",
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{
"id": 837,
"topic": "hermes.message",
"uuid": "2604cedd-49d8-4731-8733-a34649a69b2c",
"title": "INTEGRAL follow-up of S230702bb",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230702bb at 2023-07-02T22:43:14.000\n\n\nSPI-ACS excesses:\nat T0+-255.67 FAP = 0.091\nat T0+64.66 FAP = 0.204\nat T0+-12.64 FAP = 0.323\nat T0+-49.22 FAP = 0.405\nat T0+223.73 FAP = 0.419\n\n\n\n\nnext break in data in 30 hr: 2023-07-04T04:41:14, for about 9 hr",
"published": "2023-07-02T22:56:28.047611Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-07-02T22:56:28.047658Z",
"modified": "2023-07-02T22:56:28.054267Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 701,
"topic": "igwn.gwalert",
"uuid": "d739b190-658f-4b97-a456-4003a5d7c733",
"title": "S230627bj - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"time": "2023-06-27T23:45:20.782Z",
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"sequence_num": 1,
"time_created": "2023-06-27T23:45:43Z",
"superevent_id": "S230627bj",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-27T23:45:45.295502Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-27T23:45:45.295526Z",
"modified": "2023-06-27T23:45:45.302513Z",
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},
{
"id": 702,
"topic": "igwn.gwalert",
"uuid": "48882b59-c57f-444f-be17-e16dc486356d",
"title": "S230627bj - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
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"event": {
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"time": "2023-06-27T23:45:20.782Z",
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},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-06-27T23:50:18Z",
"superevent_id": "S230627bj",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-27T23:50:19.850458Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-27T23:50:19.850484Z",
"modified": "2023-06-27T23:50:19.855489Z",
"nonlocalizedevents": [],
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},
{
"id": 703,
"topic": "hermes.message",
"uuid": "f1565e25-fd6c-4b97-8071-6f13db4ccd94",
"title": "INTEGRAL follow-up of S230627bj",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230627bj at 2023-06-27T23:45:20.000\n\n\nSPI-ACS excesses:\nat T0+-12.16 FAP = 0.019\nat T0+0.09 FAP = 0.034\nat T0+27.64 FAP = 0.105\nat T0+-157.76 FAP = 0.339\nat T0+187.42 FAP = 0.43\nat T0+-8.13 FAP = 0.487\nat T0+-8.61 FAP = 0.607\nat T0+16.74 FAP = 0.759\n\n\n\n\nnext break in data in 22 hr: 2023-06-28T22:05:52, for 9.3 hr",
"published": "2023-06-27T23:57:53.744069Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-27T23:57:53.744098Z",
"modified": "2023-06-27T23:57:53.749379Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 704,
"topic": "igwn.gwalert",
"uuid": "5219178d-7167-4d4f-83d2-bd59d1633410",
"title": "S230628e - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230628e/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230628e/view/"
},
"event": {
"far": 1.817147858673707e-05,
"time": "2023-06-28T04:58:35.428Z",
"group": "CBC",
"search": "AllSky",
"area_50": 1938.5584970264931,
"area_90": 7324.5156417578555,
"duration": null,
"pipeline": "spiir",
"properties": {
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"HasMassGap": 0.5756207157664076,
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"significant": false,
"skymap_hash": "f02a44f4912e0e9726146ccdc4e062e3",
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"BNS": 0.028267616095339215,
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"Terrestrial": 0.8951220654102214
},
"skymap_version": 0,
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},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-06-28T04:59:02Z",
"superevent_id": "S230628e",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-28T04:59:03.463037Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-28T04:59:03.463077Z",
"modified": "2023-06-28T04:59:03.470651Z",
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},
{
"id": 705,
"topic": "igwn.gwalert",
"uuid": "055c5223-c80f-4d94-bbd3-5cfeb4937b5d",
"title": "S230628e - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
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"far": 1.817147858673707e-05,
"time": "2023-06-28T04:58:35.428Z",
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"area_90": 7324.5156417578555,
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"sequence_num": 2,
"time_created": "2023-06-28T05:03:37Z",
"superevent_id": "S230628e",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-28T05:03:39.145267Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-28T05:03:39.145293Z",
"modified": "2023-06-28T05:03:39.150491Z",
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},
{
"id": 706,
"topic": "hermes.message",
"uuid": "1b9858ad-eb89-49ed-a583-7b0b3a009d0f",
"title": "INTEGRAL follow-up of S230628e",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230628e at 2023-06-28T04:58:35.000\n\n\nSPI-ACS excesses:\nat T0+218.21 FAP = 0.262\nat T0+20.06 FAP = 0.263\nat T0+-214.71 FAP = 0.29\nat T0+269.24 FAP = 0.479\nat T0+7.49 FAP = 0.582\nat T0+-82.34 FAP = 0.872\nat T0+-115.61 FAP = 0.896\n\n\n\n\nnext break in data in 17 hr: 2023-06-28T22:05:52, for 9.3 hr",
"published": "2023-06-28T05:11:08.172550Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-28T05:11:08.172570Z",
"modified": "2023-06-28T05:11:08.177698Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 707,
"topic": "gcn.circular",
"uuid": "7606ce8a-9c7a-446f-ae90-33f21bcc1d59",
"title": "LIGO/Virgo/KAGRA S230627c: Additional observations from the Zwicky Transient Facility",
"submitter": "Hop gcn.circular",
"authors": "Tomas Fernando Ahumada Mena at Caltech <tahumada@umd.edu>",
"data": {
"date": "23/06/28 07:26:26 GMT",
"from": "Tomas Fernando Ahumada Mena at Caltech <tahumada@umd.edu>",
"title": "GCN CIRCULAR",
"number": "34100",
"subject": "LIGO/Virgo/KAGRA S230627c: Additional observations from the Zwicky Transient Facility"
},
"message_text": "Tomas Ahumada (CIT), Igor Andreoni (UMD), Akash Anumarlapudi (UWM), Viraj Karambelkar (CIT), Harsh Kumar (IITB), Theophile du Laz (CIT), Simeon Reusch (DESY), Anirudh Salgundi (IITB), Robert Stein (CIT), Vishwajeet Swain (IITB), Gaurav Waratkar (IITB), Shreya Anand (CIT), Eric Bellm (UW), Varun Bhalerao (IITB), Brad Cenko (UMD), Michael Coughlin (UMN), Brian Healy (UMN), David Kaplan (UWM), Mansi Kasliwal (CIT), Jannis Necker (DESY), D. Perley (LJMU), Avery Wold (IPAC) report on behalf of the ZTF and GROWTH collaborations:\n\nWe reobserved the localization region of the LVK trigger S230627c (GCN 34086) with the Palomar 48-inch telescope equipped with the 47 square-degree Zwicky Transient Facility (ZTF) camera (Graham et al., 2019; Bellm et al., 2019). We obtained images in the g- and r-bands of the Bilby map (GCN 34087) beginning at ~26.2 hours after the LVK trigger time, covering 78.6% (106.2 sq deg) of the probability enclosed in the localization region.\n\nWe queried the ZTF alert stream using AMPEL (Nordin et al. 2019) and Kowalski (Duev et al. 2019) through Fritz (Coughlin et al. 2023), and emgwcave (Karambelkar et al. in prep). We required at least 2 detections separated by at least 15 minutes to select against moving objects. Furthermore, we cross-match our candidates with the Minor Planet Center to flag known asteroids, reject stellar sources (Tachibana and Miller 2018), and apply machine learning algorithms (Mahabal et al. 2019). We require that no spatially coincident ZTF alerts were issued before the detection time of the LVK trigger. We also run forced photometry on ZTF images (Masci et al. 2019) and ATLAS images (Tonry et al. 2018, Smith et al. 2020) and require no 3- and 5-sigma detections before the LVK trigger respectively.\n\nOur observations yielded no new candidates. Furthermore, the candidates circulated on our initial GCN 34089 (Anumarlapudi et al.) show a flat evolution.\n\nZTF and GROWTH are worldwide collaborations comprising Caltech, USA; IPAC, USA, WIS, Israel; OKC, Sweden; JSI/UMd, USA; U Washington, USA; DESY, Germany; MOST, Taiwan; UW Milwaukee, USA; LANL USA; Tokyo Tech, Japan; IITB, India; IIA, India; LJMU, UK; TTU, USA; SDSU, USA and USyd, Australia. ZTF acknowledges the generous support of the NSF under AST MSIP Grant No 1440341. GROWTH acknowledges the generous support of the NSF under PIRE Grant No 1545949. Alert distribution service provided by DIRAC@UW (Patterson et al. 2019). Alert database searches are done by AMPEL (Nordin et al. 2019) and Kowalski (Duev et al. 2019). Fritz and SkyPortal acknowledge the generous support of The Gordon and Betty Moore Foundation, through the Data-Driven Investigator Program.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3OTM3MTkyLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.Rlca03vNrQy8tg6gOVznqS7ltzTGnPD1k7IFH3n7r48\n\n",
"published": "2023-06-28T07:26:38.015589Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-28T07:26:38.015610Z",
"modified": "2023-06-28T07:26:38.022701Z",
"nonlocalizedevents": [
{
"event_id": "S230627c"
}
],
"targets": []
},
{
"id": 1357,
"topic": "hermes.message",
"uuid": "add8d189-ea5d-4836-98ae-e09fe26d3370",
"title": "INTEGRAL follow-up of S230719q",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230719q at 2023-07-19T10:46:27.000\n\n\nSPI-ACS excesses:\nat T0+8.45 FAP = 0.206\nat T0+1.1 FAP = 0.243\nat T0+-257.63 FAP = 0.298\nat T0+78.5 FAP = 0.339\nat T0+80.15 FAP = 0.469\nat T0+108.77 FAP = 0.634\nat T0+-39.2 FAP = 0.782\nat T0+76.05 FAP = 0.845\n\n\n\n\nnext break in data in 17 hr: 2023-07-20T03:48:12, for 10 hr",
"published": "2023-07-19T10:59:18.387167Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-07-19T10:59:18.387184Z",
"modified": "2023-07-19T10:59:18.392316Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2642,
"topic": "igwn.gwalert",
"uuid": "d0e38b24-500b-451c-87ad-a1051b9fee79",
"title": "S230901ae - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230901ae/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230901ae/view/"
},
"event": {
"far": 2.447562672301823e-06,
"time": "2023-09-01T09:53:37.790Z",
"group": "CBC",
"search": "AllSky",
"area_50": 638.4926405943953,
"area_90": 2878.7772030743026,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 0.8299215549800518,
"HasMassGap": 0.004218181818181818,
"HasRemnant": 0.006992702742372869
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "d4cae4a7db7b1a2ee6b55609650db8f5",
"classification": {
"BBH": 0.004627455798317085,
"BNS": 0.0,
"NSBH": 0.010099151963986315,
"Terrestrial": 0.9852733922376966
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-09-01T09:58:36Z",
"superevent_id": "S230901ae",
"external_coinc": null
},
"message_text": "",
"published": "2023-09-01T09:58:37.306191Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-09-01T09:58:37.306229Z",
"modified": "2023-09-01T09:58:37.311521Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9051,
"topic": "lvk-users.beccatest",
"uuid": "e66ae4ba-8987-424b-ae58-42f10307df82",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"V1"
],
"time": [
1400505800
],
"range": 50.81225753386049
},
"message_text": "",
"published": "2024-05-23T13:23:27.950673Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T13:23:27.950692Z",
"modified": "2024-05-23T13:23:27.950700Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 708,
"topic": "gcn.circular",
"uuid": "521adc89-324d-413f-a2bd-e583e971bad2",
"title": "GRB 230628A: Fermi GBM Final Localization",
"submitter": "Hop gcn.circular",
"authors": "Andreas von Kienlin at MPE <azk@mpe.mpg.de>",
"data": {
"date": "23/06/28 11:26:43 GMT",
"from": "Andreas von Kienlin at MPE <azk@mpe.mpg.de>",
"title": "GCN CIRCULAR",
"number": "34101",
"subject": "GRB 230628A: Fermi GBM Final Localization"
},
"message_text": "The Fermi GBM team reports the detection of a likely SHORT GRB\n\n\"At 05:35:36.16 UT on 28 June 2023, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 230628A (trigger 709623341/230628233).\n\nThe on-ground calculated location, using the Fermi GBM trigger data,\nis RA = 139.19, Dec = -11.54 (J2000 degrees, equivalent to J2000 9h 16m, -11d 32'),\nwith a statistical uncertainty of 16.84 degrees.\n\nThe angle from the Fermi LAT boresight is 51 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230628233/quicklook/glg_skymap_all_bn230628233.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/bn230628233/quicklook/glg_healpix_all_bn230628233.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230628233/quicklook/glg_lc_medres34_bn230628233.gif\"\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3OTUxNjA4LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.owLoAgQ0Rqp8bUkHwSZG52IApN5lFfjF5E6lr6MisDI\n\n",
"published": "2023-06-28T11:26:53.342152Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-28T11:26:53.342171Z",
"modified": "2023-06-28T11:26:53.348703Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 709,
"topic": "igwn.gwalert",
"uuid": "c51435be-93b5-46c4-84c7-584af48f331d",
"title": "S230628ac - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230628ac/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230628ac/view/"
},
"event": {
"far": 1.601080475666095e-05,
"time": "2023-06-28T14:02:52.317Z",
"group": "CBC",
"search": "AllSky",
"area_50": 1122.3454270586333,
"area_90": 4231.718559154704,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 0.3138910226874161,
"HasMassGap": 0.2099509415645703,
"HasRemnant": 0.12434469984941438
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "e59ef6768eb11f5e8d7d1546e2fc6335",
"classification": {
"BBH": 0.008625975158811217,
"BNS": 0.0,
"NSBH": 0.038983634175416525,
"Terrestrial": 0.9523903906657722
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-06-28T14:03:17Z",
"superevent_id": "S230628ac",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-28T14:03:18.338153Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-28T14:03:18.338180Z",
"modified": "2023-06-28T14:03:18.344272Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 710,
"topic": "igwn.gwalert",
"uuid": "1c126d8d-970e-4634-baa0-9bb6c02322c7",
"title": "S230628ac - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230628ac/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230628ac/view/"
},
"event": {
"far": 1.601080475666095e-05,
"time": "2023-06-28T14:02:52.317Z",
"group": "CBC",
"search": "AllSky",
"area_50": 1122.3454270586333,
"area_90": 4231.718559154704,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 0.3138910226874161,
"HasMassGap": 0.2099509415645703,
"HasRemnant": 0.12434469984941438
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "e59ef6768eb11f5e8d7d1546e2fc6335",
"classification": {
"BBH": 0.008625975158811217,
"BNS": 0.0,
"NSBH": 0.038983634175416525,
"Terrestrial": 0.9523903906657722
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-06-28T14:14:53Z",
"superevent_id": "S230628ac",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-28T14:14:54.816174Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-28T14:14:54.816198Z",
"modified": "2023-06-28T14:14:54.821541Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 711,
"topic": "gcn.circular",
"uuid": "b0a7501a-3c03-417c-a95b-e36017a28efd",
"title": "ZTF23aaoohpy /AT2023lcr: TNG NIR detection",
"submitter": "Hop gcn.circular",
"authors": "Paolo D'Avanzo at INAF-OAB <pda.davanzo@gmail.com>",
"data": {
"date": "23/06/28 14:15:11 GMT",
"from": "Paolo D'Avanzo at INAF-OAB <pda.davanzo@gmail.com>",
"title": "GCN CIRCULAR",
"number": "34102",
"subject": "ZTF23aaoohpy /AT2023lcr: TNG NIR detection"
},
"message_text": "R. Brivio, M. Ferro, P. DâAvanzo (INAF-OAB), D. B. Malesani (U. Radboud and DAWN/NBI), A. Melandri (INAF-OAB, INAF-OAR), \nC. Padilla-Torres, A. Harutyunyan (INAF-TNG) on behalf of the CIBO collaboration report:\n\nWe observed the field of ZTF23aaoohpy/AT2023lcr (Swain et al., GCN 34022) with the Italian 3.6m TNG telescope equipped with \nthe near-infrared camera NICS. A series of images were obtained with the J and K filters on 2023-06-22 from 03:10:54 UT to 04:32:57 UT \n(i.e. at a mid time of about 60117.16 MJD).\n\nAt the position of the previously reported optical transient (e.g., Swain et al., GCN 34022, Gompertz et al., GCN 34023, Kumar et al., \nGCN 34025, Adami et al., GCN 34030, Perley et al., GCN 34031, Jian et al., GCN 34040) we clearly detect a source in both J and K filters.\n\nFrom preliminary photometry we derive K ~ 18.8 mag (Vega; calibrated against the 2MASS catalogue), not corrected for Galactic extinction.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3OTYxNzE3LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.BFcfoIE2sav-GzOoVX9LN46GDMyG9XktCrxNepZwto0\n\n",
"published": "2023-06-28T14:15:23.875368Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-28T14:15:23.875389Z",
"modified": "2023-06-28T14:15:23.879797Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 712,
"topic": "hermes.message",
"uuid": "1a181b58-c09f-4cfb-a67d-888a4ac3a2d0",
"title": "INTEGRAL follow-up of S230628ac",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230628ac at 2023-06-28T14:02:52.000\n\n\nSPI-ACS excesses:\nat T0+-31.52 FAP = 0.142\nat T0+56.88 FAP = 0.419\nat T0+-16.32 FAP = 0.478\nat T0+-23.49 FAP = 0.698\nat T0+246.56 FAP = 0.715\nat T0+268.66 FAP = 0.808\n\n\n\n\nnext break in data in 8.1 hr: 2023-06-28T22:05:52, for 9.3 hr",
"published": "2023-06-28T14:15:31.897870Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-28T14:15:31.897890Z",
"modified": "2023-06-28T14:15:31.902614Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 713,
"topic": "gcn.circular",
"uuid": "89106aae-4f70-4126-9fd8-337768e1ea82",
"title": "LIGO/Virgo/KAGRA S230516az: GOTO candidate counterpart GOTO23hu ruled out by Zwicky Transient Facility observations",
"submitter": "Hop gcn.circular",
"authors": "Simeon Reusch at DESY <simeon.reusch@desy.de>",
"data": {
"date": "23/06/28 16:28:39 GMT",
"from": "Simeon Reusch at DESY <simeon.reusch@desy.de>",
"title": "GCN CIRCULAR",
"number": "34103",
"subject": "LIGO/Virgo/KAGRA S230516az: GOTO candidate counterpart GOTO23hu ruled out by Zwicky Transient Facility observations"
},
"message_text": "Simeon Reusch (DESY), Tomas Ahumada (CIT), Anirudh Salgundi (IITB), Gokul Srinivasaragavan (UMD), Michael Coughlin (UMN), Vishwajeet Swain (IITB), Theophile du Laz (CIT), Jacob Wise (LJMU), Shreya Anand (CIT), Igor Andreoni (UMD), Eric Bellm (UW), Varun Bhalerao (IITB), S. Bradley Cenko (NASA/GSFC), Brian Healy (UMN), Mansi Kasliwal (CIT), Viraj Karambelkar (CIT), D. Kaplan (UWM), Harsh Kumar (IITB), Jannis Necker (DESY), Daniel Perley (LJMU), Robert Stein (CIT), Avery Wold (CIT/IPAC) report on behalf of the ZTF and GROWTH collaborations:\n\nWe observed parts of the localization region of LVK trigger S230516az as part of routine Zwicky Transient Facility (ZTF; Graham et al., 2019; Bellm et al., 2019) survey operations prior to and after merger time.\n\nFollowing the GOTO GCN notice (Gompertz et al., 33979), we obtained forced photometry of GOTO23hu and detected the transient in the i-band with 20.14 mag (AB) at 2023-06-15 04:37:55 UT, roughly 13 hours prior to merger time. Furthermore, the transient has since then continued to brighten in the i- and g-band, rising 1.4 mag in the g-band within 4 days.\n\nWe thereby rule out GOTO23hu as potential counterpart to S230516az.\n\nZTF and GROWTH are worldwide collaborations comprising Caltech, USA; IPAC, USA, WIS, Israel; OKC, Sweden; JSI/UMd, USA; U Washington, USA; DESY, Germany; MOST, Taiwan; UW Milwaukee, USA; LANL USA; Tokyo Tech, Japan; IITB, India; IIA, India; LJMU, UK; TTU, USA; SDSU, USA and USyd, Australia. ZTF acknowledges the generous support of the NSF under AST MSIP Grant No 1440341. GROWTH acknowledges generous support of the NSF under PIRE Grant No 1545949. Alert distribution service provided by DIRAC@UW (Patterson et al. 2019). Alert database searches are done by AMPEL (Nordin et al. 2019) and Kowalski (Duev et al. 2019).\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3OTY5NzI1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.zvcjMOp5KNeMR-Dt9V4uo1h_BL5xnkvy2dAk2QdYP0w\n\n",
"published": "2023-06-28T16:28:54.702530Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-28T16:28:54.702550Z",
"modified": "2023-06-28T16:28:54.709828Z",
"nonlocalizedevents": [
{
"event_id": "S230516a"
}
],
"targets": []
},
{
"id": 717,
"topic": "igwn.gwalert",
"uuid": "d85ef430-4132-4832-b7fd-e441da7f2615",
"title": "S230628aj - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230628aj/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230628aj/view/"
},
"event": {
"far": 2.101472e-07,
"time": "2023-06-28T16:42:24.785Z",
"group": "CBC",
"search": "AllSky",
"area_50": 581.0010258974303,
"area_90": 1859.8747177879459,
"duration": null,
"pipeline": "MBTA",
"properties": {
"HasNS": 0.5405289520088914,
"HasMassGap": 0.01980838893847309,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "0027df0a333bd4acff14f175dc9be5ac",
"classification": {
"BBH": 0.6929456,
"BNS": 0.0,
"NSBH": 0.000869632,
"Terrestrial": 0.306184772
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-06-28T16:47:30Z",
"superevent_id": "S230628aj",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-28T16:47:31.224927Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-28T16:47:31.224962Z",
"modified": "2023-06-28T16:47:31.230766Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 714,
"topic": "gcn.circular",
"uuid": "d877db7b-8da8-4581-91e9-754369542951",
"title": "GRB 230623B: CALET Gamma-Ray Burst Monitor detection",
"submitter": "Hop gcn.circular",
"authors": "Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>",
"data": {
"date": "23/06/28 16:39:07 GMT",
"from": "Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>",
"title": "GCN CIRCULAR",
"number": "34104",
"subject": "GRB 230623B: CALET Gamma-Ray Burst Monitor detection"
},
"message_text": "S. Nakahira (JAXA), A. Yoshida, T. Sakamoto, S. Sugita (AGU),\nY. Kawakubo (LSU), K. Yamaoka (Nagoya U), Y. Asaoka (ICRR),\nS. Torii, Y. Akaike, K. Kobayashi (Waseda U),\nY. Shimizu, T. Tamura (Kanagawa U), N. Cannady (GSFC/UMBC),\nM. L. Cherry (LSU), S. Ricciarini (U of Florence),\nP. S. Marrocchesi (U of Siena),\nand the CALET collaboration:\n\nThe long GRB 230623B (GECAM trigger 195; Swift/BAT-GUANO\ndetection: Ronchini et al.,GCN Circ. 34076) triggered the CALET\nGamma-ray Burst Monitor (CGBM) at 21:22:37.02 UTC on 23\nJune 2023\n(http://cgbm.calet.jp/cgbm_trigger/flight/1371590547/index.html).\nThe burst signal was seen by all CGBM detectors. No real-time\nCGBM GCN notice was distributed about this trigger because\nthe real-time communication from the ISS was off (loss of signal).\n\nThe burst light curve shows a multi-peaked structure that starts\nat T-3.2 sec, peaks at T+13.9 sec, and ends at T+20.4 sec.\nThe T90 and T50 durations measured by the SGM data are 21.4 +/- 1.5 sec\nand 13.4 +/- 0.6 sec (40-1000 keV), respectively.\n\nThe ground-processed light curve is available at\n\nhttp://cgbm.calet.jp/cgbm_trigger/ground/1371590547/\n\nThe CALET data used in this analysis are provided by\nthe Waseda CALET Operation Center located at Waseda University.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3OTcwMzUyLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.pfYqRlCEh3TAOKli1hnvPPYo1j6ZgCdn63O3de50iFk\n\n",
"published": "2023-06-28T16:39:18.083051Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-28T16:39:18.083070Z",
"modified": "2023-06-28T16:39:18.088895Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 715,
"topic": "gcn.circular",
"uuid": "be932acf-e3e0-400c-888d-da6edbe7d401",
"title": "GRB 230628B: 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": "23/06/28 16:42:07 GMT",
"from": "Jimmy DeLaunay at University of Alabama <delauj2@gmail.com>",
"title": "GCN CIRCULAR",
"number": "34105",
"subject": "GRB 230628B: Swift/BAT-GUANO detection of a burst outside the coded FOV"
},
"message_text": "James DeLaunay (U Alabama), Aaron Tohuvavohu (U Toronto), Gayathri Raman (PSU), Samuele Ronchini (PSU), Jamie A. Kennea (PSU), Tyler Parsotan (NASA GSFC) report:\n\nSwift/BAT did not localize GRB 230628B onboard (T0: 2023-06-28T01:35:56.03 UTC, INTEGRAL trig 10298, Fermi trig. 709608965).\n\nThe INTEGRAL and Fermi notices, 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 14.54 in a 16.384 s analysis time bin, starting at T0.\n\nNITRATES results are consistent with a burst coming from outside the FOV, with DeltaLLHOut of 0.78.\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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3OTcwNTMwLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.0FyjFPas8oJ7O9nou6d88JfYyXJDLcwj6CSa56yZxe8\n\n",
"published": "2023-06-28T16:42:15.531662Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-28T16:42:15.531682Z",
"modified": "2023-06-28T16:42:15.536773Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 716,
"topic": "igwn.gwalert",
"uuid": "6830aa8f-63ad-4b1d-9dbf-d8652e903c98",
"title": "S230628aj - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230628aj/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230628aj/view/"
},
"event": {
"far": 2.101472e-07,
"time": "2023-06-28T16:42:24.785Z",
"group": "CBC",
"search": "AllSky",
"area_50": 581.0010258974303,
"area_90": 1859.8747177879459,
"duration": null,
"pipeline": "MBTA",
"properties": {
"HasNS": 0.5405289520088914,
"HasMassGap": 0.01980838893847309,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "0027df0a333bd4acff14f175dc9be5ac",
"classification": {
"BBH": 0.6929456,
"BNS": 0.0,
"NSBH": 0.000869632,
"Terrestrial": 0.306184772
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-06-28T16:42:55Z",
"superevent_id": "S230628aj",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-28T16:42:56.623438Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-28T16:42:56.623463Z",
"modified": "2023-06-28T16:42:56.628190Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 718,
"topic": "hermes.message",
"uuid": "dc817e03-c893-42d7-ab13-7959aaa2c370",
"title": "INTEGRAL follow-up of S230628aj",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230628aj at 2023-06-28T16:42:24.000\n\n\nSPI-ACS excesses:\nat T0+-80.21 FAP = 0.056\nat T0+-60.39 FAP = 0.231\nat T0+25.59 FAP = 0.389\nat T0+42.51 FAP = 0.979\n\n\n\n\nnext break in data in 5.4 hr: 2023-06-28T22:05:52, for 9.3 hr",
"published": "2023-06-28T16:55:07.114439Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-28T16:55:07.114457Z",
"modified": "2023-06-28T16:55:07.119394Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 719,
"topic": "gcn.circular",
"uuid": "ae4c79e6-0aa1-4f94-a8ba-4e4d5e7afd5a",
"title": "GRB 230628C: Fermi GBM Final Real-time Localization",
"submitter": "Hop gcn.circular",
"authors": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"data": {
"date": "23/06/28 17:47:08 GMT",
"from": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"title": "GCN CIRCULAR",
"number": "34106",
"subject": "GRB 230628C: Fermi GBM Final Real-time Localization"
},
"message_text": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 17:36:34 UT on 28 Jun 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230628C (trigger 709666599.86266 / 230628734).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 301.0, Dec = 35.6 (J2000 degrees, equivalent to J2000 20h 03m, 35d 36'), with a statistical uncertainty of 3.3 degrees.\n\nThe angle from the Fermi LAT boresight is 18.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230628734/quicklook/glg_skymap_all_bn230628734.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/bn230628734/quicklook/glg_healpix_all_bn230628734.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230628734/quicklook/glg_lc_medres34_bn230628734.gif\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3OTc0NDMzLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.Eje6S4ZBHFznk0Dw1iJ2n6V8Q_xNDq0o-Wx8ksbrUDU\n\n",
"published": "2023-06-28T17:47:18.912460Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-28T17:47:18.912480Z",
"modified": "2023-06-28T17:47:18.918355Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 720,
"topic": "gcn.circular",
"uuid": "aae5007b-e77a-4db6-9bcc-9ad8aa35262e",
"title": "LIGO/Virgo/KAGRA low-significance gravitational wave candidate S230628aj: one counterpart neutrino candidate from IceCube neutrino searches",
"submitter": "Hop gcn.circular",
"authors": "acz2122@columbia.edu",
"data": {
"date": "23/06/28 18:26:22 GMT",
"from": "acz2122@columbia.edu",
"title": "GCN CIRCULAR",
"number": "34107",
"subject": "LIGO/Virgo/KAGRA low-significance gravitational wave candidate S230628aj: one counterpart neutrino candidate from IceCube neutrino searches"
},
"message_text": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nA search for track-like muon neutrino events detected by IceCube consistent with the sky\nlocalization of the low-significance gravitational wave candidate S230628aj in a time range of 1000 seconds\ncentered on the alert event time (2023-06-28 16:34:04 UTC to 2023-06-28 16:50:44 UTC)\nhas been performed [1,2]. During this time period IceCube was collecting good quality data.\nOne hypothesis test was conducted for this low-significance gravitational wave event. The\nsearch uses a Bayesian approach to quantify the joint GW + neutrino event significance, which\nassumes a binary merger scenario and accounts for known astrophysical priors, such as GW source\ndistance, in the significance estimate [3].\n\nOne track-like event is found in spatial and temporal coincidence with the gravitational-wave\ncandidate S230628aj calculated from the map circulated by LVK as S230628aj-2-Preliminary. This\nrepresents an overall pre-trial p-value of 0.0080 for the Bayesian search. The most probable\nmulti-messenger source direction based on the neutrinos and GW skymap is RA 147.97, Dec 8.91 degrees.\n\nThe reported p-value here does not account for any trials correction (multiple hypotheses testing).\nThe false alarm rate of these coincidences can be obtained by multiplying the p-values with their\ncorresponding GW trigger rates. Further details are available at https://gcn.nasa.gov/missions/icecube.\n\nProperties of the coincident event(s) are shown below.\n\ndt(s)\tRA(deg)\t\tDec(deg)\tAngular uncertainty(deg) p-value(generic transient) p-value(Bayesian)\n-----------------------------------------------------------------------------------------------------\n-301.0 147.97 \t8.91 \t1.509 \tnull (not applicable) \t0.0086\n...\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\n \trepresenting 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\ngeographic South Pole, Antarctica. The IceCube realtime alert point of contact can be\nreached at roc@icecube.wisc.edu\n\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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3OTc2Nzg4LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.H1Z5oJEWu2Lj_OG2gpvp75gFpGZ6ZMgdUgV1t0FmJHw\n\n",
"published": "2023-06-28T18:26:33.410517Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-28T18:26:33.410536Z",
"modified": "2023-06-28T18:26:33.418056Z",
"nonlocalizedevents": [
{
"event_id": "S230628a"
}
],
"targets": []
},
{
"id": 725,
"topic": "igwn.gwalert",
"uuid": "ba687585-bdb6-4131-8c81-d0809247de54",
"title": "S230628ax - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230628ax/files/bayestar.multiorder.fits,1",
"gracedb": "https://gracedb.ligo.org/superevents/S230628ax/view/"
},
"event": {
"far": 3.167545842243851e-10,
"time": "2023-06-28T23:12:00.373Z",
"group": "CBC",
"search": "AllSky",
"area_50": 183.2282939201629,
"area_90": 704.7968385660774,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.0,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "a91adfe7a76e4a5425c96b48e96ca2c9",
"classification": {
"BBH": 0.9999757910828331,
"BNS": 0.0,
"NSBH": 0.0,
"Terrestrial": 2.4208917166923527e-05
},
"skymap_version": 1,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-06-28T23:17:08Z",
"superevent_id": "S230628ax",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-28T23:17:09.709707Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-28T23:17:09.709730Z",
"modified": "2023-06-28T23:17:09.714823Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6025,
"topic": "gcn.circular",
"uuid": "e0ca4006-1803-44de-a127-c06745ee331b",
"title": "Fermi trigger No 729703985: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "24/02/15 17:31:18 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/35732"
},
"title": "GCN CIRCULAR",
"number": "35732",
"subject": "Fermi trigger No 729703985: 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-Tunka robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the Fermi GRB240215.65 (trigger No 729703985,09h 15m 43.20s , -07d 10m 48.0s, R\u0011.87) errorbox 274 sec after notice time and 311 sec after trigger time at 2024-02-15 15:38:11 UT, with upper limit up to 19.4 mag. The observations began at zenith distance = 60 deg. The sun altitude is -46.5 deg.\n\nThe galactic latitude b = 28 deg., longitude l = 239 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id#79234\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 342 | 2024-02-15 15:38:11 | MASTER-Tunka | (09h 09m 19.71s , -08d 04m 28.2s) | C | 60 | 19.4 |\n 414 | 2024-02-15 15:39:24 | MASTER-Tunka | (08h 56m 54.44s , -09d 58m 01.1s) | C | 60 | 19.4 |\n 648 | 2024-02-15 15:43:18 | MASTER-Tunka | (09h 05m 02.38s , -09d 58m 57.3s) | C | 60 | 19.2 |\n 806 | 2024-02-15 15:45:56 | MASTER-Tunka | (09h 07m 03.13s , -06d 10m 56.9s) | C | 60 | 18.8 |\n 878 | 2024-02-15 15:47:07 | MASTER-Tunka | (09h 15m 00.37s , -06d 12m 04.6s) | C | 60 | 18.7 |\n 951 | 2024-02-15 15:48:21 | MASTER-Tunka | (09h 12m 17.52s , -09d 58m 00.1s) | C | 60 | 18.9 |\n 1022 | 2024-02-15 15:49:32 | MASTER-Tunka | (09h 20m 24.98s , -09d 59m 44.4s) | C | 60 | 18.9 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35732.",
"published": "2024-02-15T17:31:35.307812Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-02-15T17:31:35.307855Z",
"modified": "2024-02-15T17:31:35.317409Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 721,
"topic": "gcn.circular",
"uuid": "d9f8ee68-29e2-4af3-9b04-5df2322c7a46",
"title": "GRB 230628D: Fermi GBM Final Real-time Localization",
"submitter": "Hop gcn.circular",
"authors": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"data": {
"date": "23/06/28 20:32:52 GMT",
"from": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"title": "GCN CIRCULAR",
"number": "34108",
"subject": "GRB 230628D: Fermi GBM Final Real-time Localization"
},
"message_text": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 20:22:31 UT on 28 Jun 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230628D (trigger 709676556.5632 / 230628849).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 175.0, Dec = 12.3 (J2000 degrees, equivalent to J2000 11h 39m, 12d 18'), with a statistical uncertainty of 1.6 degrees.\n\nThe angle from the Fermi LAT boresight is 25.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230628849/quicklook/glg_skymap_all_bn230628849.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/bn230628849/quicklook/glg_healpix_all_bn230628849.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230628849/quicklook/glg_lc_medres34_bn230628849.gif\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3OTg0Mzc3LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.830T5BamOjK7NuOOAJhoaDKwt_cUtc-2ScE7tBTv-ds\n\n",
"published": "2023-06-28T20:33:02.978439Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-28T20:33:02.978457Z",
"modified": "2023-06-28T20:33:02.986301Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 722,
"topic": "gcn.circular",
"uuid": "32ee2871-e1fd-48af-9616-c63ec0311f61",
"title": "GRB 230628D: BALROG localization (Fermi Trigger 709676556 / GRB 230628849)",
"submitter": "Hop gcn.circular",
"authors": "Jochen Greiner at MPE <jcgrog@mpe.mpg.de>",
"data": {
"date": "23/06/28 20:54:04 GMT",
"from": "Jochen Greiner at MPE <jcgrog@mpe.mpg.de>",
"title": "GCN CIRCULAR",
"number": "34109",
"subject": "GRB 230628D: BALROG localization (Fermi Trigger 709676556 / GRB 230628849)"
},
"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\n709676556 at 20:22:31 on 28 June 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) = 177.0+/-1.2 deg\nDecl.(2000.0) = 3.0+/-1.1 deg\nWe estimate an additional systematic error of 2 deg.\n\nFurther details are available at:\nhttps://grb.mpe.mpg.de/grb/GRB230628849/\n\nThe Healpix map can be downloaded from:\nhttps://grb.mpe.mpg.de/grb/GRB230628849/healpix\n\nThe location parameters are available as JSON at:\nhttps://grb.mpe.mpg.de/grb/GRB230628849/json\n\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3OTg1NjQ5LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.GFnJn_OmOIUOeu4yNj2LCumWzuGHPUg9rtx13pY6Goc\n\n",
"published": "2023-06-28T20:54:14.344918Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-28T20:54:14.344938Z",
"modified": "2023-06-28T20:54:14.351661Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 723,
"topic": "gcn.circular",
"uuid": "38d3cfb1-7d45-48aa-b068-552f41107a26",
"title": "GRB 230628E: Swift detection of a burst",
"submitter": "Hop gcn.circular",
"authors": "N. Klingler at NASA-GSFC/UMBC/CRESST II <noelklingler@gmail.com>",
"data": {
"date": "23/06/28 23:00:04 GMT",
"from": "N. Klingler at NASA-GSFC/UMBC/CRESST II <noelklingler@gmail.com>",
"title": "GCN CIRCULAR",
"number": "34110",
"subject": "GRB 230628E: Swift detection of a burst"
},
"message_text": "CRESSTII), C. Salvaggio (INAF-OAB), T. Sbarrato (INAF-OAB), M. H. Siegel (PSU) and M. A. Williams (PSU) report on behalf of the Neil Gehrels Swift Observatory Team:\n\nAt 22:26:10 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 230628E (trigger=1177054). Swift slewed immediately to the burst. The BAT on-board calculated location is \nRA, Dec 171.841, -11.447 which is \n RA(J2000) = 11h 27m 22s\n Dec(J2000) = -11d 26' 47\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single peaked structure with a duration of about 5 sec. The peak count rate was ~600 counts/sec (15-350 keV), at ~0 sec after the trigger.\n\nThe XRT began observing the field at 22:29:48.3 UT, 217.7 seconds after the BAT trigger. Using promptly downlinked data we find a bright, uncatalogued X-ray source located at RA, Dec 171.8499, -11.4641 which is equivalent to:\n RA(J2000) = +11h 27m 23.77s \n Dec(J2000) = -11d 27' 50.2â\nwith an uncertainty of 1.9 arcseconds (radius, 90% containment). This position may be improved as more data are received; the latest position is available at https://www.swift.ac.uk/sper. No spectrum from the\npromptly downlinked event data is yet available to determine the column density.\n\nUVOT took a finding chart exposure of 150 seconds with the White filter starting 221 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers none of the XRT error circle. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.040.\n\nBurst Advocate for this burst is N. J. Klingler (noelklin AT umbc.edu) Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/)\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3OTkzMjA5LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.bovQyNiBaDr3o1bCE4qt2OZfp0x5Y6z7seHoWaZpIQg\n\n",
"published": "2023-06-28T23:00:14.552592Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-28T23:00:14.552611Z",
"modified": "2023-06-28T23:00:14.561015Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 724,
"topic": "igwn.gwalert",
"uuid": "58e96ea7-616b-4da3-a177-e0d5e9fb7b36",
"title": "S230628ax - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230628ax/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230628ax/view/"
},
"event": {
"far": 1.816407809752951e-13,
"time": "2023-06-28T23:12:00.367Z",
"group": "CBC",
"search": "AllSky",
"area_50": 234.84485310064966,
"area_90": 788.0967328532859,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.0,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "4b8e1646185609f58fe78e63be7085d1",
"classification": {
"BBH": 0.9999987267269341,
"BNS": 0.0,
"NSBH": 0.0,
"Terrestrial": 1.2732730658715496e-06
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-06-28T23:12:27Z",
"superevent_id": "S230628ax",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-28T23:12:29.100217Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-28T23:12:29.100242Z",
"modified": "2023-06-28T23:12:29.105584Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1358,
"topic": "igwn.gwalert",
"uuid": "a8e53e52-f186-45de-9209-87756aa49d66",
"title": "S230719an - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230719an/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230719an/view/"
},
"event": {
"far": 1.92321e-05,
"time": "2023-07-19T12:52:06.080Z",
"group": "Burst",
"search": "AllSky",
"area_50": 2007.5903993451113,
"area_90": 5978.498458250446,
"duration": 0.043877,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "5108bf6a82edc517d5b1409d5de0c50b",
"classification": {},
"skymap_version": 0,
"central_frequency": 31.019081
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-07-19T12:54:06Z",
"superevent_id": "S230719an",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-19T12:54:08.129646Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-19T12:54:08.129669Z",
"modified": "2023-07-19T12:54:08.137581Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 726,
"topic": "gcn.circular",
"uuid": "c6722e44-f5ab-4af5-ba17-099a989ef87a",
"title": "Swift GRB230628.93: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/06/28 23:52:49 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "34111",
"subject": "Swift GRB230628.93: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) was pointed to the Swift GRB230628.93 (trigger No 1177054,11h 27m 21.84s , -11d 26m 49.2s, R=0.05) errorbox 4426 sec after notice time and 4457 sec after trigger time at 2023-06-28 23:40:27 UT, with upper limit up to 18.1 mag. The observations began at zenith distance = 35 deg. The sun altitude is -24.6 deg.\n\nThe galactic latitude b = 46 deg., longitude l = 273 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"30049\n\nWe obtain a following upper limits.\n\nTmid-T0 | Site |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____|_______|______|________\n\n 4487 | MASTER-OAFA | C | 60 | 18.0 |\n 4579 | MASTER-OAFA | C | 60 | 18.1 |\n 4672 | MASTER-OAFA | C | 60 | 18.1 |\n 4764 | MASTER-OAFA | C | 60 | 18.0 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3OTk2Mzc0LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.0ycUovL0JfA4QWTu8EBelMn1nJEh_EksyVXDKKUQofo\n\n",
"published": "2023-06-28T23:52:59.467252Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-28T23:52:59.467270Z",
"modified": "2023-06-28T23:52:59.472692Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 3215,
"topic": "hermes.message",
"uuid": "dfe49f18-4c88-436d-b28b-0dd38c11595c",
"title": "INTEGRAL follow-up of S230915aw",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230915aw at 2023-09-15T13:09:07.000\n\n\nSPI-ACS excesses:\nat T0+2.24 FAP = 0.055\nat T0+11.94 FAP = 0.119\nat T0+144.92 FAP = 0.293\nat T0+31.12 FAP = 0.464\nat T0+-22.56 FAP = 0.715\nat T0+-143.96 FAP = 0.786\nat T0+-81.76 FAP = 0.88\n\n\n\n\nnext break in data in 28 hr: 2023-09-16T17:33:35, for 9.3 hr",
"published": "2023-09-21T16:22:18.131408Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-09-21T16:22:18.131427Z",
"modified": "2023-09-21T16:22:18.138167Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 731,
"topic": "igwn.gwalert",
"uuid": "fb4bf088-052b-418e-80f2-1f7a19a5a1bd",
"title": "S230629e - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230629e/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230629e/view/"
},
"event": {
"far": 1.869453880633898e-05,
"time": "2023-06-29T01:00:13.936Z",
"group": "CBC",
"search": "AllSky",
"area_50": 349.93299420023095,
"area_90": 1423.0223754555336,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.0,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "d63422379001e925d5ae48b2f3b00de7",
"classification": {
"BBH": 0.0,
"BNS": 0.002144232646383008,
"NSBH": 0.00012151130420527772,
"Terrestrial": 0.9977342560494117
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-06-29T01:05:18Z",
"superevent_id": "S230629e",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-29T01:05:20.422103Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-29T01:05:20.422126Z",
"modified": "2023-06-29T01:05:20.426889Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 727,
"topic": "gcn.circular",
"uuid": "9724717e-b56c-40b2-9bfd-e21ecc3c1e04",
"title": "GRB 230628E: LCOGT Optical Upper Limit",
"submitter": "Hop gcn.circular",
"authors": "Robert Strausbaugh at University of Minnesota <rstrausb@umn.edu>",
"data": {
"date": "23/06/29 00:32:59 GMT",
"from": "Robert Strausbaugh at University of Minnesota <rstrausb@umn.edu>",
"title": "GCN CIRCULAR",
"number": "34112",
"subject": "GRB 230628E: LCOGT Optical Upper Limit"
},
"message_text": "R. Strausbaugh (University of Minnesota), A. Cucchiara (NASA) report on behalf\nof a larger collaboration:\n\nWe observed the GRB 230628E (Klingler et al., GCN 34110) field with the LCOGT\n1-meter Sinistro instrument at the Cerro Tololo Interamerican Observatory,\nChile site, on June 28, from 23:08 to 23:40 UT (corresponding to 0.70 to\n1.23 hours from the GRB trigger time) with the SDSS r and i filters.\n\nWe performed a series of 3x300s exposures in each band. We do not detect a\nsource within the Swift-XRT error region (Klingler et al., GCN 34110) in\neither band.\n\nThe following upper limits are calculated using the PanSTARRS catalog as\nreference:\n\nr > 19.2\n\ni > 19.0\n\nThese magnitudes are not corrected for galactic extinction.\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3OTk4Nzg1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.kepCgl-_ZWy5JIZM1oRIkeR2dTgtPljep27d_VlrkGM\n\n",
"published": "2023-06-29T00:33:10.888722Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-29T00:33:10.888743Z",
"modified": "2023-06-29T00:33:10.893712Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 728,
"topic": "igwn.gwalert",
"uuid": "b6514f52-b68f-4830-994a-95072bcaea19",
"title": "S230628ax - INITIAL",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230628ax/files/bayestar.multiorder.fits,1",
"gracedb": "https://gracedb.ligo.org/superevents/S230628ax/view/"
},
"event": {
"far": 3.167545842243851e-10,
"time": "2023-06-28T23:12:00.373Z",
"group": "CBC",
"search": "AllSky",
"area_50": 183.2282939201629,
"area_90": 704.7968385660774,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.0,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "a91adfe7a76e4a5425c96b48e96ca2c9",
"classification": {
"BBH": 0.9999757910828331,
"BNS": 0.0,
"NSBH": 0.0,
"Terrestrial": 2.4208917166923527e-05
},
"skymap_version": 1,
"central_frequency": null
},
"alert_type": "INITIAL",
"sequence_num": 3,
"time_created": "2023-06-29T00:47:07Z",
"superevent_id": "S230628ax",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-29T00:47:08.610691Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-29T00:47:08.610747Z",
"modified": "2023-06-29T00:47:08.616325Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 729,
"topic": "gcn.circular",
"uuid": "f1297f26-82a9-40af-bfaf-db342e20ac8d",
"title": "LIGO/Virgo/KAGRA S230628ax: Identification of a GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "David Hui at Chungnam National University <huichungyue@gmail.com>",
"data": {
"date": "23/06/29 00:59:04 GMT",
"from": "David Hui at Chungnam National University <huichungyue@gmail.com>",
"title": "GCN CIRCULAR",
"number": "34113",
"subject": "LIGO/Virgo/KAGRA S230628ax: 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 S230628ax during\nreal-time processing of data from LIGO Hanford Observatory (H1) and\nLIGO Livingston Observatory (L1) at 2023-06-28 23:12:00.373 UTC (GPS\ntime: 1372029138.373). The candidate was found by the CWB [1], MBTA\n[2], GstLAL [3], PyCBC Live [4], and SPIIR [5] analysis pipelines.\n\nS230628ax is an event of interest because its false alarm rate, as\nestimated by the online analysis, is 3.2e-10 Hz, or about one in 1e2\nyears. The event's properties can be found at this URL:\n\nhttps://gracedb.ligo.org/superevents/S230628ax\n\nThe classification of the GW signal, in order of descending\nprobability, is BBH (>99%), Terrestrial (<1%), BNS (<1%), or NSBH\n(<1%).\n\nAssuming the candidate is astrophysical in origin, the probability\nthat the lighter compact object is consistent with a neutron star mass\n(HasNS) is <1%. [6] Using the masses and spins inferred from the\nsignal, the probability of matter outside the final compact object\n(HasRemnant) is <1%. [6] Both HasNS and HasRemnant consider the\nsupport of several neutron star equations of state. The probability\nthat 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 26 seconds after the\ncandidate event time.\n * bayestar.multiorder.fits,1, an initial localization generated by\nBAYESTAR [7], distributed via GCN notice about 5 minutes after the\ncandidate event time.\n\nThe preferred sky map at this time is bayestar.multiorder.fits,1. For\nthe bayestar.multiorder.fits,1 sky map, the 90% credible region is 705\ndeg2. Marginalized over the whole sky, the a posteriori luminosity\ndistance estimate is 2047 +/- 585 Mpc (a posteriori mean +/- standard\ndeviation).\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\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg4MDAwMzUwLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.-81_-CTNMROvxIxh4bhRqDYJ99eobmqJUzHTXh3CYw8\n\n",
"published": "2023-06-29T00:59:15.532377Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-29T00:59:15.532396Z",
"modified": "2023-06-29T00:59:15.537510Z",
"nonlocalizedevents": [
{
"event_id": "S230628a"
}
],
"targets": []
},
{
"id": 730,
"topic": "igwn.gwalert",
"uuid": "00aa3e9f-72f4-441f-a3f4-6ae02d538b40",
"title": "S230629e - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230629e/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230629e/view/"
},
"event": {
"far": 1.869453880633898e-05,
"time": "2023-06-29T01:00:13.936Z",
"group": "CBC",
"search": "AllSky",
"area_50": 349.93299420023095,
"area_90": 1423.0223754555336,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.0,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "d63422379001e925d5ae48b2f3b00de7",
"classification": {
"BBH": 0.0,
"BNS": 0.002144232646383008,
"NSBH": 0.00012151130420527772,
"Terrestrial": 0.9977342560494117
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-06-29T01:00:37Z",
"superevent_id": "S230629e",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-29T01:00:38.690240Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-29T01:00:38.690264Z",
"modified": "2023-06-29T01:00:38.695463Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 851,
"topic": "igwn.gwalert",
"uuid": "226f8f90-efe6-4140-8c76-14866413c4a1",
"title": "S230703ac - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
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{
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"title": "S230703ad - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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{
"id": 6175,
"topic": "gcn.circular",
"uuid": "ec86e7c8-7ff4-4119-9967-eddd86d38ebf",
"title": "GRB 231028C: Glowbug gamma-ray confirmation of a prior burst",
"submitter": "Hop gcn.circular",
"authors": "C.C. Cheung at Naval Research Lab <Teddy.Cheung@nrl.navy.mil>",
"data": {
"date": "24/03/05 21:53:20 GMT",
"from": "C.C. Cheung at Naval Research Lab <Teddy.Cheung@nrl.navy.mil>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/35879"
},
"title": "GCN CIRCULAR",
"number": "35879",
"subject": "GRB 231028C: Glowbug gamma-ray confirmation of a prior burst"
},
"message_text": "C.C. Cheung, M. Kerr, J.E. Grove, R. Woolf (NRL), A. Goldstein (USRA), C.A. Wilson-Hodge, D. Kocevski (MSFC), and M.S. Briggs (UAH) report:\n \nThe Glowbug gamma-ray telescope [1,2], operating on the International Space Station, reports the detection of GRB 231028C, which was also detected by Konus/Wind (Trigger time 12:31:37.779 UT). This was previously identified in Glowbug data as a candidate GRB, and we report it here as confirmation of the independent Konus/Wind trigger.\n \nUsing an adaptive window with a resolution of 32-ms, the burst onset is determined to be 2023-10-28 12:31:37.104 with a duration of 4.1 s and a total significance of about 12.7 sigma. The light curve comprises a single peak.\n \nUsing a standard power-law function with an exponential high-energy cutoff [3] to model the emission over this duration results in a photon index dN/dE~E^x of x=0.6 and a cutoff energy (\"Epeak\") of 303 keV. The modeled 10-10000 keV fluence is 2.1e-06 erg/cm^2.\n \nThe best-fit localization was RA, Decl. (J2000, deg) = 125.5,-45.5 with a radius of 22.3 deg (95% confidence), with a highly uncertain systematic uncertainty.\n \nThe analysis results presented here are preliminary and use a response function that lacks a detailed characterization of the surrounding passive structure of the ISS.\n \nGlowbug is a NASA-funded technology demonstrator for sensitive, low-cost gamma-ray transient telescopes developed, built, and operated by the U.S. Naval Research Laboratory (NRL) with support from the University of Alabama in Huntsville, USRA, and NASA MSFC. It was launched on 2023 March 15 aboard the Department of Defense Space Test Programâs STP-H9 to the ISS. The detector comprises 12 large-area (15 cm x 15 cm) CsI:Tl panels covering the surface of a half cube, and two hexagonal (5-cm diameter, 10-cm length) CLLB scintillators, giving it a large field of view (instantaneous FoV ~2/3 sky) over a wide energy band of 50 keV to >2 MeV.\n \n[1] Grove, J.E. et al. 2020, Proc. Yamada Conf. LXXI, arXiv:2009.11959\n[2] Woolf, R.S. et al. 2022, Proc. SPIE, 12181, id. 121811O\n[3] Goldstein, A. et al. 2020, ApJ 895, 40, arXiv :1909.03006\n \nDistribution Statement A: Approved for public release. Distribution is unlimited.\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35879.",
"published": "2024-03-05T21:53:36.701554Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-03-05T21:53:36.701570Z",
"modified": "2024-03-05T21:53:36.709412Z",
"nonlocalizedevents": [],
"targets": []
}
]
}
