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"count": 257639,
"next": "https://hermes.lco.global/api/v0/messages/?format=api&limit=100&offset=1900&ordering=id",
"previous": "https://hermes.lco.global/api/v0/messages/?format=api&limit=100&offset=1700&ordering=id",
"results": [
{
"id": 1801,
"topic": "gcn.circular",
"uuid": "45d4526d-be4d-4339-b76f-37ff09487294",
"title": "Fermi trigger No 712718833: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/08/03 02:15:33 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "34326",
"subject": "Fermi trigger No 712718833: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB230803.06 (trigger No 712718833,10h 33m 38.40s , -64d 22m 48.0s, R=3.33) errorbox 566 sec after notice time and 602 sec after trigger time at 2023-08-03 01:37:10 UT, with upper limit up to 15.2 mag. The observations began at zenith distance = 83 deg. The sun altitude is -48.7 deg.\n\nThe galactic latitude b = -6 deg., longitude l = 289 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"49288\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 632 | 2023-08-03 01:37:10 | MASTER-SAAO | (10h 31m 29.69s , -64d 13m 16.9s) | C | 60 | 14.0 |\n 692 | 2023-08-03 01:37:10 | MASTER-SAAO | (10h 31m 29.69s , -64d 13m 16.9s) | C | 180 | 14.0 | Coadd\n 632 | 2023-08-03 01:37:10 | MASTER-SAAO | (10h 33m 24.96s , -64d 14m 58.3s) | C | 60 | 14.9 |\n 692 | 2023-08-03 01:37:10 | MASTER-SAAO | (10h 33m 24.97s , -64d 14m 57.9s) | C | 180 | 15.2 | Coadd\n 723 | 2023-08-03 01:38:41 | MASTER-SAAO | (10h 31m 23.52s , -64d 13m 50.9s) | C | 60 | 13.4 |\n 723 | 2023-08-03 01:38:41 | MASTER-SAAO | (10h 33m 18.65s , -64d 15m 33.1s) | C | 60 | 14.6 |\n 803 | 2023-08-03 01:40:00 | MASTER-SAAO | (10h 31m 24.53s , -64d 12m 54.1s) | C | 60 | 13.6 |\n 803 | 2023-08-03 01:40:00 | MASTER-SAAO | (10h 33m 19.47s , -64d 14m 36.0s) | C | 60 | 14.8 |\n 894 | 2023-08-03 01:41:32 | MASTER-SAAO | (10h 31m 30.04s , -64d 13m 54.6s) | C | 60 | 13.6 |\n 894 | 2023-08-03 01:41:32 | MASTER-SAAO | (10h 33m 24.97s , -64d 15m 37.3s) | C | 60 | 14.6 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMDI4OTM5LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.cnZSkAI_oQjabgNi8AGUH3PbT-29oHyLv70AScUT9Rk\n\n",
"published": "2023-08-03T02:15:45.259083Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-03T02:15:45.259102Z",
"modified": "2023-08-03T02:15:45.267740Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1802,
"topic": "igwn.gwalert",
"uuid": "9621bcc9-953c-46cd-afb7-dcd17d5d33ea",
"title": "S230803d - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230803d/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230803d/view/"
},
"event": {
"far": 1.141323282384785e-06,
"time": "2023-08-03T03:34:12.417Z",
"group": "CBC",
"search": "AllSky",
"area_50": 1087.7245641936727,
"area_90": 4284.594058803007,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.04264138160689884,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "95f7e5dc9abc21584563379f9c53e4a0",
"classification": {
"BBH": 0.626109394041368,
"BNS": 5.3686106590968215e-14,
"NSBH": 3.717582986250523e-12,
"Terrestrial": 0.3738906059548607
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-03T03:34:38Z",
"superevent_id": "S230803d",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-03T03:34:39.328305Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-03T03:34:39.328348Z",
"modified": "2023-08-03T03:34:39.335416Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1803,
"topic": "igwn.gwalert",
"uuid": "30512bad-c995-4a54-839c-52440f9a974d",
"title": "S230803d - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230803d/files/bayestar.multiorder.fits,1",
"gracedb": "https://gracedb.ligo.org/superevents/S230803d/view/"
},
"event": {
"far": 1.316182e-05,
"time": "2023-08-03T03:34:12.403Z",
"group": "CBC",
"search": "AllSky",
"area_50": 789.5654967324053,
"area_90": 3436.068183494517,
"duration": null,
"pipeline": "MBTA",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.007151515151515151,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "cf9c0208718ef55a2122c2e0e2527f6a",
"classification": {
"BBH": 0.037934067,
"BNS": 0.0,
"NSBH": 1.702e-06,
"Terrestrial": 0.962064229
},
"skymap_version": 1,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-03T03:39:14Z",
"superevent_id": "S230803d",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-03T03:39:15.007299Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-03T03:39:15.007324Z",
"modified": "2023-08-03T03:39:15.013903Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1804,
"topic": "gcn.circular",
"uuid": "bfbbddfa-a011-4c25-944e-a72277537b2a",
"title": "LIGO/Virgo/KAGRA S230802aq: AstroSat CZTI non-detection and upper limits",
"submitter": "Hop gcn.circular",
"authors": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"data": {
"date": "23/08/03 05:28:49 GMT",
"from": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"title": "GCN CIRCULAR",
"number": "34327",
"subject": "LIGO/Virgo/KAGRA S230802aq: AstroSat CZTI non-detection and upper limits"
},
"message_text": "G. Waratkar (IITB), V. Bhalerao (IITB), M. Dixit (IITB), D. Bhattacharya (Ashoka University/IUCAA), A. R. Rao (TIFR), S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:\n\nWe have carried out a search for X-ray candidates in Astrosat CZTI data in a 100-sec window around the trigger time of the event S230802aq (UTC 2023-08-02 11:33:59, GraceDB event). We use the bayestar.multiorder.fits,0 map (https://gracedb.ligo.org/api/superevents/S230802aq/files/bayestar.multiorder.fits,0) for our analysis. CZTI is a coded aperture mask instrument that has a considerable effective area for about 29% of the entire sky but is also sensitive to brighter transients from the entire sky. At the time of the merger, Astrosat's nominal pointing is RA, DEC = 17:22:28.7, -41:35:57.7 (260.6196,-41.5994), which is ~128 deg away from the maximum probability location. At the time of the merger event, the Earth-satellite-transient angle corresponding to the maximum probability location is ~53 deg and is occulted by Earth in the satellite's frame. In a time interval of 100 sec around the event, the region of the localization map not occulted by Earth in the satellite's frame has a total probability of 0.70 (70%) of containing the source.\n\nCZTI data were de-trended to remove orbit-wise background variation. We then searched data from the four independent, identical quadrants for coincident spikes in the count rates. Searches were undertaken by binning the data in 0.1s, 1s, and 10s respectively. Statistical fluctuations in background count rates were estimated by using data from 5 preceding orbits. We selected confidence levels such that the probability of a false trigger in a 100-sec window is 10^-4. We do not find any evidence for any hard X-ray transient in this window, in the CZTI energy range of 20-200 keV.\n\nWe use a detailed mass model of the satellite to calculate the direction-dependent instrument response for points in the visible sky. We then assume the source is modeled as a power law with photon index alpha = -1, and convert our count rate upper limits to direction-dependent flux limits. We obtain the following upper limits for source flux in the 20-200 keV band by taking a probability-weighted mean over the visible sky:\n\n0.1 s: flux limit= 1.68e-05 ergs/cm^2/s; fluence limit = 1.68e-06 ergs/cm^2\n1.0 s: flux limit= 3.31e-06 ergs/cm^2/s; fluence limit = 3.31e-06 ergs/cm^2\n10.0 s: flux limit= 3.84e-07 ergs/cm^2/s; fluence limit = 3.84e-06 ergs/cm^2\n\nCZTI is built by a TIFR-led consortium of institutes across India, including VSSC, URSC, IUCAA, SAC, and PRL. The Indian Space Research Organisation funded, managed, and facilitated the project.\n\nCZTI GRB detections are reported regularly on the payload site at:\nhttp://astrosat.iucaa.in/czti/?q=emgw\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMDQwNTM1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.bnwPZIL8feYU5oKRnwHANgHv-4uJfNRSfU96HnCUWdk\n\n",
"published": "2023-08-03T05:29:02.894406Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-03T05:29:02.894435Z",
"modified": "2023-08-03T05:29:02.902696Z",
"nonlocalizedevents": [
{
"event_id": "S230802a"
}
],
"targets": []
},
{
"id": 1805,
"topic": "gcn.circular",
"uuid": "334f3363-bae0-4d6b-98e8-c466c887fd73",
"title": "GRB 230803A: AstroSat CZTI detection",
"submitter": "Hop gcn.circular",
"authors": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"data": {
"date": "23/08/03 12:04:58 GMT",
"from": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"title": "GCN CIRCULAR",
"number": "34328",
"subject": "GRB 230803A: AstroSat CZTI detection"
},
"message_text": "P. K. Navaneeth (IUCAA), G. Waratkar (IITB), A. Vibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (Ashoka University/IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:\n\nAnalysis of AstroSat CZTI data with the ML pipeline (Abraham et al., 2021, MNRAS, 504, 3084) and the CIFT framework (Sharma et al., 2021, JApA, 42, 73) showed the detection of a bright long GRB 230803A which was also detected by Fermi (Fermi GBM Team, GCN Circ. 34325).\n\nThe source was clearly detected in the 20-200 keV energy range. The light curve showed multiple peaks of emission with the strongest peak at 2023-08-03 01:28:42.50 UTC. The measured peak count rate associated with the burst is 783 (+56, -59) counts/s above the background in the combined data of all quadrants, with a total of 5492 (+498, -481) counts. The local mean background count rate was 430 (+3, -3) counts/s. Using cumulative rates, we measure a T90 of 25 (+2, -1) s. In the preliminary analysis, we find 371 Compton events associated with this event.\n\nThe source was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range. The light curve showed multiple peaks of emission with the strongest peak at 2023-08-03 01:28:42.63 UTC. The measured peak count rate associated with the burst is 2196 (+97, -102) counts/s above the background in the combined data of all quadrants, with a total of 15329 (+934, -934) counts. The local mean background count rate was 1365 (+7, -5) counts/s. We measure a T90 of 26 (+2, -1) s from the cumulative Veto light curve.\n\nCZTI is built by a TIFR-led consortium of institutes across India, including VSSC, URSC, IUCAA, SAC, and PRL. The Indian Space Research Organisation funded, managed, and facilitated the project.\n\nCZTI GRB detections are reported regularly on the payload site at:\nhttp://astrosat.iucaa.in/czti/?q=grb\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMDY0MzA0LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.PYmvd6jAxfjOhMMko9o_qLrbGpTb_Etyrr1FUQINFlk\n\n",
"published": "2023-08-03T12:05:11.654356Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-03T12:05:11.654374Z",
"modified": "2023-08-03T12:05:11.662914Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1806,
"topic": "gcn.circular",
"uuid": "d11b1ca6-c8aa-4963-b463-a6918c1a7e36",
"title": "GRB 230802A: Swift/UVOT Upper Limits",
"submitter": "Hop gcn.circular",
"authors": "Sam LaPorte at PSU <sjl5346@psu.edu>",
"data": {
"date": "23/08/03 13:59:26 GMT",
"from": "Sam LaPorte at PSU <sjl5346@psu.edu>",
"title": "GCN CIRCULAR",
"number": "34329",
"subject": "GRB 230802A: Swift/UVOT Upper Limits"
},
"message_text": "GRB 230802A: Swift/UVOT Upper Limits\n\nS. J. LaPorte (PSU) and N. J. Klingler (GSFC/UMBC/CRESSTII)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 230802A\n73 s after the BAT trigger (Klingler et al., GCN Circ. 34313).\nNo optical afterglow consistent with the XRT position\n(Evans et al., GCN Circ. 34317)\nis detected in the initial UVOT exposures.\nPreliminary 3-sigma upper limits using the UVOT photometric system\n(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first\nfinding chart (FC) exposure and subsequent exposures are:\n\nFilter T_start(s) T_stop(s) Exp(s) Mag\n\nwhite_FC 73 223 147 >20.0\nu_FC 286 535 246 >19.5\nwhite 73 1186 353 >20.5\nv 615 1581 117 >18.4\nb 541 1506 97 >19.2\nu 286 5048 492 >19.7\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.614 in the direction of the burst\n(Schlegel et al. 1998).\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMDcxMTcyLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.ARDqS7C6Ndgg0CUhp-kY7ob5n7BaWv5jX5WBOa0RJfw\n\n",
"published": "2023-08-03T13:59:38.411152Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-03T13:59:38.411170Z",
"modified": "2023-08-03T13:59:38.418180Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1807,
"topic": "gcn.circular",
"uuid": "f33e6f0a-e9ce-4d4f-ac0e-086a9e7340d6",
"title": "IPN triangulation of GRB 230803A",
"submitter": "Hop gcn.circular",
"authors": "Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru>",
"data": {
"date": "23/08/03 20:39:17 GMT",
"from": "Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru>",
"title": "GCN CIRCULAR",
"number": "34330",
"subject": "IPN triangulation of GRB 230803A"
},
"message_text": "A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin\non behalf of the HEND/Mars Odyssey team,\n\nA. Ridnaia, D. Frederiks, D. Svinkin, A. Lysenko,\nand T. Cline on behalf of the Konus-Wind team,\n\nA. Goldstein, M. S. Briggs, C. Wilson-Hodge,\nand E. Burns on behalf of the Fermi GBM team,\n\nE. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,\n\nand\n\nW. Boynton, C. Fellows, K. Harshman, H. Enos, R. Starr,\nand A.S. Gardner on on behalf of the GRS-Odyssey GRB team,\nreport:\n\nThe long-duration GRB 230803A\n(Fermi GBM detection: Fermi GBM team, GCN 34325;\nAstroSat CZTI detection: Navaneeth et al., GCN 34328)\nhas been detected by Fermi (GBM), Konus-Wind,\nINTEGRAL (SPI-ACS), AstroSat (CZTI), and\nMars-Odyssey (HEND), so far, at about 5228 s UT (01:27:08).\n\nWe have triangulated it to a preliminary, 3 sigma error box\nwhose coordinates are:\n ---------------------------------------------\n RA(2000), deg Dec(2000), deg\n ---------------------------------------------\n Center:\n 150.510 (10h 02m 02s) -64.987 (-64d 59' 12\")\n Corners:\n 147.455 (09h 49m 49s) -64.554 (-64d 33' 15\")\n 147.329 (09h 49m 19s) -64.581 (-64d 34' 51\")\n 153.688 (10h 14m 45s) -65.347 (-65d 20' 50\")\n 153.812 (10h 15m 15s) -65.315 (-65d 18' 54\")\n ---------------------------------------------\nThe error box area is 431 sq. arcmin, and its maximum\ndimension is 2.8 deg (the minimum one is 3 arcmin).\nThe Sun distance was 83 deg.\n\nThe IPN localization is consistent with, but reduces\nthe area of, the Fermi-GBM final localization (GCN 34325).\n\nThis localization may be improved.\n\nA triangulation map and HEALPix FITS file are posted at\nhttp://www.ioffe.ru/LEA/GRBs/GRB230803_T05229/IPN/\n\nThe Konus-Wind time history and spectrum will be given\nin a forthcoming GCN Circular.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMDk1MTYzLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.Tt3zgFo5NU-G0SaUyQXJtmrj8nGlm2EIesVCldYcrAE\n\n",
"published": "2023-08-03T20:39:33.510937Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-03T20:39:33.510956Z",
"modified": "2023-08-03T20:39:33.519091Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1808,
"topic": "gcn.circular",
"uuid": "5c0f697f-fe5a-4f31-a406-6bf6609f3354",
"title": "Fermi trigger No 712798043: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/08/04 00:31:18 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "34331",
"subject": "Fermi trigger No 712798043: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB230803.98 (trigger No 712798043,03h 14m 57.60s , -33d 52m 47.6s, R=4.4) errorbox 576 sec after notice time and 608 sec after trigger time at 2023-08-03 23:37:26 UT, with upper limit up to 15.6 mag. The observations began at zenith distance = 68 deg. The sun altitude is -71.2 deg.\n\nThe galactic latitude b = -58 deg., longitude l = 234 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"49535\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 638 | 2023-08-03 23:37:26 | MASTER-SAAO | (03h 22m 04.45s , -33d 44m 25.7s) | C | 60 | 15.6 |\n 638 | 2023-08-03 23:37:26 | MASTER-SAAO | (03h 21m 06.33s , -33d 43m 44.1s) | C | 60 | 15.2 |\n 718 | 2023-08-03 23:38:45 | MASTER-SAAO | (03h 21m 59.43s , -33d 45m 01.6s) | C | 60 | 14.0 |\n 718 | 2023-08-03 23:38:45 | MASTER-SAAO | (03h 21m 01.34s , -33d 44m 20.6s) | C | 60 | 13.3 |\n 1582 | 2023-08-03 23:53:10 | MASTER-SAAO | (03h 13m 52.24s , -34d 07m 25.5s) | C | 60 | 12.9 |\n 1582 | 2023-08-03 23:53:10 | MASTER-SAAO | (03h 12m 53.62s , -34d 06m 52.5s) | C | 60 | 12.1 |\n 1673 | 2023-08-03 23:54:41 | MASTER-SAAO | (03h 13m 58.82s , -34d 07m 23.1s) | C | 60 | 13.1 |\n 1843 | 2023-08-03 23:57:31 | MASTER-SAAO | (03h 13m 55.04s , -34d 07m 13.9s) | C | 60 | 14.1 |\n 1843 | 2023-08-03 23:57:31 | MASTER-SAAO | (03h 12m 56.59s , -34d 06m 43.3s) | C | 60 | 13.4 |\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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMTA5MDgzLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.SE-avRlDTR8xuw6n7xgCKv4ozclFK6WMywaMljoR10Y\n\n",
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"title": "S230804b - PRELIMINARY",
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{
"id": 1811,
"topic": "gcn.circular",
"uuid": "642f45ac-ff30-4b01-881c-cd8116616821",
"title": "GRB 230804A: 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": "23/08/04 06:49:23 GMT",
"from": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"title": "GCN CIRCULAR",
"number": "34332",
"subject": "GRB 230804A: Fermi GBM Final Real-time Localization"
},
"message_text": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 06:38:55 UT on 4 Aug 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230804A (trigger 712823940.838898 / 230804277).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 199.8, Dec = -45.2 (J2000 degrees, equivalent to J2000 13h 19m, -45d 12'), with a statistical uncertainty of 16.6 degrees.\n\nThe angle from the Fermi LAT boresight is 71.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230804277/quicklook/glg_skymap_all_bn230804277.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/bn230804277/quicklook/glg_healpix_all_bn230804277.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230804277/quicklook/glg_lc_medres34_bn230804277.gif\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMTMxNzY4LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.AD-M4jKmvrVcJTHYY5CgG-Fv_7KpwgEtNVkOmisMpLs\n\n",
"published": "2023-08-04T06:49:38.930223Z",
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"retracted": false,
"created": "2023-08-04T06:49:38.930250Z",
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{
"id": 1818,
"topic": "gcn.circular",
"uuid": "123bbee6-0dd0-447a-bfff-2cb9e7bac934",
"title": "GRB 230802A: Swift-BAT refined analysis",
"submitter": "Hop gcn.circular",
"authors": "Sibasish Laha at NASA-GSFC <slaha@umbc.edu>",
"data": {
"date": "23/08/04 14:09:21 GMT",
"from": "Sibasish Laha at NASA-GSFC <slaha@umbc.edu>",
"title": "GCN CIRCULAR",
"number": "34333",
"subject": "GRB 230802A: Swift-BAT refined analysis"
},
"message_text": "S. D. Barthelmy (GSFC), H. A. Krimm (NSF),\nS. Laha (GSFC/UMBC), A. Y. Lien (U Tampa),\nC. B. Markwardt (GSFC),D. M. Palmer (LANL),\nT. Parsotan (GSFC/UMBC),T. Sakamoto (AGU),\nM. Stamatikos (OSU) (i.e. the Swift-BAT team):\n\nUsing the data set from T-240 to T+962 sec from the recent telemetry\ndownlink,\nwe report further analysis of BAT GRB 230802A (trigger #1182085)\n(Klingler et al., GCN Circ. 34313). The BAT ground-calculated position is\nRA, Dec = 76.232, 19.552 deg which is\n RA(J2000) = 05h 04m 55.6s\n Dec(J2000) = +19d 33' 06.3\"\nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 99%.\n\nThe BAT light curve shows a complex structure with a duration of ~ 200 sec.\nT90 (15-350 keV) is 175.62 +- 18.26 sec (estimated error including\nsystematics).\n\nThe time-averaged spectrum from T-6.04 to T+230.70 sec is best fit by a\nsimple\npower-law model. The power law index of the time-averaged spectrum is\n1.60 +- 0.07. The fluence in the 15-150 keV band is 5.0 +- 0.2 x 10^-06\nerg/cm2.\nThe 1-sec peak photon flux measured from T+0.60 sec in the 15-150 keV band\nis 2.3 +- 0.2 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/1182085/BA/\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMTU4MTY3LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.7ZhQHCfC15Mz5Kpapo20geJz1w4uf9MRXjsp4DZu4aU\n\n",
"published": "2023-08-04T14:09:33.858247Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-04T14:09:33.858275Z",
"modified": "2023-08-04T14:09:33.864888Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1819,
"topic": "gcn.circular",
"uuid": "15d396eb-de6c-4c8d-ae33-f32ff348218e",
"title": "GRB 230802A: Fermi GBM observation",
"submitter": "Hop gcn.circular",
"authors": "Joe Mangan at IJCLab <joseph.mangan@ijclab.in2p3.fr>",
"data": {
"date": "23/08/04 15:39:21 GMT",
"from": "Joe Mangan at IJCLab <joseph.mangan@ijclab.in2p3.fr>",
"title": "GCN CIRCULAR",
"number": "34334",
"subject": "GRB 230802A: Fermi GBM observation"
},
"message_text": "C. de Barra (UCD), J.Mangan (CNRS/IJCLab) and C. Meegan (UAH)\nreport on behalf of the Fermi GBM Team:\n\n\"At 06:50:22.23 UT on 2 August 2023, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 230802A (trigger 712651827 / 230802285),\nwhich was also detected by Swift BAT (N. J. Klingler et al. 2023, GCN 34313).\nThe Fermi GBM on-ground location is consistent with the Swift BAT position.\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 107 degrees.\n\nThe GBM light curve consists of a single peak\nwith a duration (T90) of about 38 s (50-300 keV)The time-averaged spectrum from -14.3s to 26.6 s is\nbest fit by a simple power law function with index -1.7 +/- 0.02.\n\nThe event fluence (10-1000 keV) in this time interval is\n(1.3 +/- 0.1)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+4.4 s in the 10-1000 keV band\nis 5.6 +/- 0.4 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog:\nhttps://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html\n\nFor Fermi GBM data and info, please visit the official Fermi GBM Support Page:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMTYzNTY3LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.pJ0Dhohf47Wq0jutGoj9FPkBeZ55HL3Ob7LeePrs6W4\n\n",
"published": "2023-08-04T15:39:35.869277Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-04T15:39:35.869293Z",
"modified": "2023-08-04T15:39:35.874492Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1820,
"topic": "gcn.circular",
"uuid": "297d2e61-230a-4500-9738-d890990ebbaf",
"title": "GRB 230802B: AstroSat CZTI detection",
"submitter": "Hop gcn.circular",
"authors": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"data": {
"date": "23/08/04 17:23:10 GMT",
"from": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"title": "GCN CIRCULAR",
"number": "34335",
"subject": "GRB 230802B: AstroSat CZTI detection"
},
"message_text": "B. Pari (IITB), P K. Navaneeth (IUCAA), G. Waratkar (IITB), A. Vibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (Ashoka University/IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:\n\nAnalysis of AstroSat CZTI data with the CIFT framework (Sharma et al., 2021, JApA, 42, 73) showed the detection of GRB 230802B which was also detected by Fermi (Fermi GBM Team, GCN Circ. 34322).\n\nThe source was faintly detected in the 20-200 keV energy range in two quadrants. The light curve peaks at 2023-08-02 23:58:47.95 UTC. The measured peak count rate associated with the burst is 145.4 (+108.1, -8.4) counts/s above the background in the combined data of two quadrants, with a total of 169 (+54, -65) counts. The local mean background count rate was 151.0 (+5.2, -5.8) counts/s. Using cumulative rates, we measure a T90 of 2.7 (+0.8, -1.1) s.\n\nCZTI is built by a TIFR-led consortium of institutes across India, including VSSC, URSC, IUCAA, SAC, and PRL. The Indian Space Research Organisation funded, managed, and facilitated the project.\n\nCZTI GRB detections are reported regularly on the payload site at:\nhttp://astrosat.iucaa.in/czti/?q=grb\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMTY5Nzk2LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.J0Py5WUXYAWDg03duB_rxcrvx0ntWem1GmqjXcLs24o\n\n",
"published": "2023-08-04T17:23:24.586716Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-04T17:23:24.586747Z",
"modified": "2023-08-04T17:23:24.593285Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1821,
"topic": "igwn.gwalert",
"uuid": "b11936b4-80b8-461c-aa26-49bcc2a08ae0",
"title": "S230804av - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230804av/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230804av/view/"
},
"event": {
"far": 1.91626920518277e-05,
"time": "2023-08-04T22:44:18.141Z",
"group": "CBC",
"search": "AllSky",
"area_50": 471.4732051973731,
"area_90": 2151.948906321432,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.03369230769230769,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "bfa12e0faa33c6b7cad1d9551cb07f74",
"classification": {
"BBH": 0.07907856459170236,
"BNS": 1.2478820803773383e-15,
"NSBH": 7.709689189953898e-14,
"Terrestrial": 0.9209214354082194
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-04T22:44:49Z",
"superevent_id": "S230804av",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-04T22:44:50.582887Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-04T22:44:50.582918Z",
"modified": "2023-08-04T22:44:50.589138Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1822,
"topic": "igwn.gwalert",
"uuid": "336033f0-66f5-46c9-b55e-0aaa8f496fd9",
"title": "S230804av - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230804av/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230804av/view/"
},
"event": {
"far": 1.91626920518277e-05,
"time": "2023-08-04T22:44:18.141Z",
"group": "CBC",
"search": "AllSky",
"area_50": 471.4732051973731,
"area_90": 2151.948906321432,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.03369230769230769,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "bfa12e0faa33c6b7cad1d9551cb07f74",
"classification": {
"BBH": 0.07907856459170236,
"BNS": 1.2478820803773383e-15,
"NSBH": 7.709689189953898e-14,
"Terrestrial": 0.9209214354082194
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-04T22:49:26Z",
"superevent_id": "S230804av",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-04T22:49:27.457311Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-04T22:49:27.457335Z",
"modified": "2023-08-04T22:49:27.460731Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1823,
"topic": "igwn.gwalert",
"uuid": "8ca335ed-224e-48ea-a1c2-ef1c6253c465",
"title": "S230802aq - UPDATE",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230802aq/files/bayestar.multiorder.fits,1",
"gracedb": "https://gracedb.ligo.org/superevents/S230802aq/view/"
},
"event": {
"far": 2.227455849027153e-08,
"time": "2023-08-02T11:33:59.961Z",
"group": "CBC",
"search": "AllSky",
"area_50": 9003.942225825398,
"area_90": 25883.81601831239,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.08569595008756568,
"HasMassGap": 0.62215411558669,
"HasRemnant": 0.0001496935201401051
},
"instruments": [
"H1"
],
"significant": true,
"skymap_hash": "3d32f3cfa68b83f2e48dd8e761db7996",
"classification": {
"BBH": 0.9030120009153612,
"BNS": 3.4911816230730146e-17,
"NSBH": 0.062349231125445236,
"Terrestrial": 0.03463876795919363
},
"skymap_version": 1,
"central_frequency": null
},
"alert_type": "UPDATE",
"sequence_num": 4,
"time_created": "2023-08-04T23:03:13Z",
"superevent_id": "S230802aq",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-04T23:03:15.322996Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-04T23:03:15.323020Z",
"modified": "2023-08-04T23:03:15.329196Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1824,
"topic": "gcn.circular",
"uuid": "1650c327-3610-450d-bc13-c77fe1a533c6",
"title": "LIGO/Virgo/KAGRA S230802aq: Updated Sky localization and EM Bright Classification",
"submitter": "Hop gcn.circular",
"authors": "carl.haster@unlv.edu",
"data": {
"date": "23/08/04 23:08:50 GMT",
"from": "carl.haster@unlv.edu",
"title": "GCN CIRCULAR",
"number": "34336",
"subject": "LIGO/Virgo/KAGRA S230802aq: Updated Sky localization and EM Bright Classification"
},
"message_text": "We have conducted further analysis of the LIGO Hanford Observatory (H1) data around the time of the compact binary merger (CBC) candidate S230802aq (GCN Circular 34314). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.offline0.multiorder.fits,0, distributed via GCN Notice, is available for retrieval from the GraceDB event page:\n\nhttps://gracedb.ligo.org/superevents/S230802aq\n\nBased on posterior support from parameter estimation [1], under the assumption that the candidate S230802aq is astrophysical in origin, the probability that the lighter compact object is consistent with a neutron star mass (HasNS) is 9%. [2] Using the masses and spins inferred from the signal, the probability of matter outside the final compact object (HasRemnant) is <1%. [2] Both HasNS and HasRemnant consider the support of several neutron star equations of state. The probability that either of the binary components lies between 3 and 5 solar masses (HasMassgap) is 62%.\n\nFor the Bilby.offline0.multiorder.fits,0 sky map, the 90% credible region is 25885 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 576 +/- 246 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---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMTkwNTM1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.J8rjZ0IqhMNfXi24UW-FLzLfpvm7KayhQ5lf8klfNvw\n\n",
"published": "2023-08-04T23:09:00.394802Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-04T23:09:00.394821Z",
"modified": "2023-08-04T23:09:00.398302Z",
"nonlocalizedevents": [
{
"event_id": "S230802a"
}
],
"targets": []
},
{
"id": 1825,
"topic": "igwn.gwalert",
"uuid": "8fd3bfaf-8afd-4b99-817f-f3f6f3c0a765",
"title": "S230805c - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230805c/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230805c/view/"
},
"event": {
"far": 2.10017791978294e-05,
"time": "2023-08-05T00:03:39.212Z",
"group": "CBC",
"search": "AllSky",
"area_50": 509.4512426431783,
"area_90": 1743.6325479261993,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.45594227994228,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "9d256094b7e6da92059de8c95c074467",
"classification": {
"BBH": 0.0,
"BNS": 0.0021589511898702216,
"NSBH": 0.0,
"Terrestrial": 0.9978410488101298
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-05T00:04:12Z",
"superevent_id": "S230805c",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-05T00:04:12.938662Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-05T00:04:12.938690Z",
"modified": "2023-08-05T00:04:12.943251Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1826,
"topic": "igwn.gwalert",
"uuid": "1d85fd3e-635f-499d-bd21-0461c42c7624",
"title": "S230805c - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230805c/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230805c/view/"
},
"event": {
"far": 2.10017791978294e-05,
"time": "2023-08-05T00:03:39.212Z",
"group": "CBC",
"search": "AllSky",
"area_50": 509.4512426431783,
"area_90": 1743.6325479261993,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.45594227994228,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "9d256094b7e6da92059de8c95c074467",
"classification": {
"BBH": 0.0,
"BNS": 0.0021589511898702216,
"NSBH": 0.0,
"Terrestrial": 0.9978410488101298
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-05T00:08:53Z",
"superevent_id": "S230805c",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-05T00:08:54.847887Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-05T00:08:54.847920Z",
"modified": "2023-08-05T00:08:54.851434Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1827,
"topic": "hermes.message",
"uuid": "b6743cba-b887-45dc-887a-2e2193547f60",
"title": "INTEGRAL follow-up of S230805c",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230805c at 2023-08-05T00:03:39.000\n\n\nSPI-ACS excesses:\nat T0+3.04 FAP = 0.044\nat T0+-52.43 FAP = 0.195\nat T0+91.97 FAP = 0.377\nat T0+57.62 FAP = 0.717\nat T0+-24.33 FAP = 0.863\n\n\n\n\nnext break in data in 2.9 hr: 2023-08-05T02:55:52, for 10 hr",
"published": "2023-08-05T00:48:17.284632Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-08-05T00:48:17.284653Z",
"modified": "2023-08-05T00:48:17.290012Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1828,
"topic": "igwn.gwalert",
"uuid": "fcb7cba8-e611-4342-b591-fe1edccee7ca",
"title": "S230805k - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230805k/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230805k/view/"
},
"event": {
"far": 1.885659730760381e-05,
"time": "2023-08-05T01:48:51.214Z",
"group": "CBC",
"search": "AllSky",
"area_50": 2694.1326011278456,
"area_90": 9930.522410138527,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.0,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "25936b7f46212d8fea98396c42aba74a",
"classification": {
"BBH": 0.0,
"BNS": 0.12201184473226603,
"NSBH": 0.0,
"Terrestrial": 0.877988155267734
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-05T01:49:26Z",
"superevent_id": "S230805k",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-05T01:49:28.180055Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-05T01:49:28.180083Z",
"modified": "2023-08-05T01:49:28.184650Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1829,
"topic": "igwn.gwalert",
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{
"id": 1830,
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"title": "S230805s - PRELIMINARY",
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{
"id": 1831,
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"title": "S230805s - PRELIMINARY",
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{
"id": 1832,
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"title": "S230805w - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
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"superevent_id": "S230805w",
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},
"message_text": "",
"published": "2023-08-05T03:32:39.513183Z",
"message_parser": "IGWN Alert Avro Parser v1",
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"created": "2023-08-05T03:32:39.513206Z",
"modified": "2023-08-05T03:32:39.518806Z",
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},
{
"id": 1833,
"topic": "igwn.gwalert",
"uuid": "a4917be6-96e3-433e-b182-c7135ab5c22f",
"title": "S230805w - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"superevent_id": "S230805w",
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},
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"published": "2023-08-05T03:37:12.339891Z",
"message_parser": "IGWN Alert Avro Parser v1",
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"created": "2023-08-05T03:37:12.339912Z",
"modified": "2023-08-05T03:37:12.343225Z",
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},
{
"id": 1834,
"topic": "igwn.gwalert",
"uuid": "95329bd7-3fa6-41d6-a9da-b43ab717f81a",
"title": "S230805x - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"time": "2023-08-05T03:42:49.970Z",
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"area_90": 2392.826182497037,
"duration": null,
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"NSBH": 3.1794832149443214e-18,
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},
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"sequence_num": 1,
"time_created": "2023-08-05T03:43:16Z",
"superevent_id": "S230805x",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-05T03:43:17.389882Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-05T03:43:17.389903Z",
"modified": "2023-08-05T03:43:17.393587Z",
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},
{
"id": 1835,
"topic": "igwn.gwalert",
"uuid": "1c965bdd-af87-4dc3-b09b-3b8d7da438bc",
"title": "S230805x - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
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"gracedb": "https://gracedb.ligo.org/superevents/S230805x/view/"
},
"event": {
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"area_90": 2235.0389771973378,
"duration": null,
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},
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"sequence_num": 2,
"time_created": "2023-08-05T03:47:53Z",
"superevent_id": "S230805x",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-05T03:47:54.232276Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-05T03:47:54.232296Z",
"modified": "2023-08-05T03:47:54.235857Z",
"nonlocalizedevents": [],
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},
{
"id": 1836,
"topic": "igwn.gwalert",
"uuid": "fcf391e9-306b-4490-9e8d-599cbb15ff3f",
"title": "S230805z - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
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"gracedb": "https://gracedb.ligo.org/superevents/S230805z/view/"
},
"event": {
"far": 5.854e-06,
"time": "2023-08-05T04:10:13.265Z",
"group": "Burst",
"search": "AllSky",
"area_50": 132.6083959433644,
"area_90": 521.2013536761345,
"duration": 0.00779,
"pipeline": "CWB",
"properties": {},
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],
"significant": false,
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"classification": {},
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},
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"sequence_num": 1,
"time_created": "2023-08-05T04:11:42Z",
"superevent_id": "S230805z",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-05T04:11:42.352090Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-05T04:11:42.352110Z",
"modified": "2023-08-05T04:11:42.357125Z",
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},
{
"id": 1837,
"topic": "igwn.gwalert",
"uuid": "c836a750-5f62-4029-a537-71f070dcdfac",
"title": "S230805z - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
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"gracedb": "https://gracedb.ligo.org/superevents/S230805z/view/"
},
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"time": "2023-08-05T04:10:13.265Z",
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"area_90": 521.2013536761345,
"duration": 0.00779,
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"properties": {},
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],
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"sequence_num": 2,
"time_created": "2023-08-05T04:16:26Z",
"superevent_id": "S230805z",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-05T04:16:28.140262Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-05T04:16:28.140282Z",
"modified": "2023-08-05T04:16:28.143850Z",
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},
{
"id": 1838,
"topic": "igwn.gwalert",
"uuid": "cfb07d6b-c46d-49ff-a3b6-79481a59437f",
"title": "S230805x - INITIAL",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230805x/files/bayestar.multiorder.fits,1",
"gracedb": "https://gracedb.ligo.org/superevents/S230805x/view/"
},
"event": {
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"time": "2023-08-05T03:42:49.972Z",
"group": "CBC",
"search": "AllSky",
"area_50": 644.3676961108735,
"area_90": 2235.0389771973378,
"duration": null,
"pipeline": "pycbc",
"properties": {
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"HasMassGap": 0.0,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "acb501ced5a65b8d60bba34ebec0ade2",
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"BNS": 0.0,
"NSBH": 0.0,
"Terrestrial": 0.0002499390856434136
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},
"alert_type": "INITIAL",
"sequence_num": 3,
"time_created": "2023-08-05T04:30:39Z",
"superevent_id": "S230805x",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-05T04:30:40.247503Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-05T04:30:40.247523Z",
"modified": "2023-08-05T04:30:40.250988Z",
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},
{
"id": 1839,
"topic": "gcn.circular",
"uuid": "23c4c320-b83d-4c94-a44f-360e755f8974",
"title": "LIGO/Virgo/KAGRA S230805x: Identification of a GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "ê³½ê·ì§ <kyujin.kwak.72@gmail.com>",
"data": {
"date": "23/08/05 04:40:29 GMT",
"from": "ê³½ê·ì§ <kyujin.kwak.72@gmail.com>",
"title": "GCN CIRCULAR",
"number": "34337",
"subject": "LIGO/Virgo/KAGRA S230805x: 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 S230805x during\nreal-time processing of data from LIGO Hanford Observatory (H1) and\nLIGO Livingston Observatory (L1) at 2023-08-05 03:42:49.972 UTC (GPS\ntime: 1375242187.972). The candidate was found by the CWB [1], GstLAL\n[2], MBTA [3], PyCBC Live [4], and SPIIR [5] analysis pipelines.\n\nS230805x is an event of interest because its false alarm rate, as\nestimated by the online analysis, is 9.2e-09 Hz, or about one in 3\nyears. The event's properties can be found at this URL:\n\nhttps://gracedb.ligo.org/superevents/S230805x\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\n2235 deg2. Marginalized over the whole sky, the a posteriori\nluminosity distance estimate is 3852 +/- 1193 Mpc (a posteriori mean\n+/- standard deviation).\n\nFor further information about analysis methodology and the contents of\nthis alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide\nhttps://emfollow.docs.ligo.org/userguide/.\n\n [1] Klimenko et al. PRD 93, 042004 (2016)\n [2] Tsukada et al. arXiv:2305.06286 (2023) and Ewing et al.\narXiv:2305.05625 (2023)\n [3] Aubin et al. CQG 38, 095004 (2021)\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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMjEwNDM1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.JzvLMZI9kFBbL3OYVSycHAf2cTTkdDeahyL-HZA0rJg\n\n",
"published": "2023-08-05T04:40:43.808997Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-05T04:40:43.809016Z",
"modified": "2023-08-05T04:40:43.812639Z",
"nonlocalizedevents": [
{
"event_id": "S230805x"
}
],
"targets": []
},
{
"id": 1840,
"topic": "igwn.gwalert",
"uuid": "366a2216-8b49-462a-bfde-271c52d3c13d",
"title": "S230805ae - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230805ae/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230805ae/view/"
},
"event": {
"far": 1.67124e-05,
"time": "2023-08-05T04:40:32.926Z",
"group": "Burst",
"search": "BBH",
"area_50": 2975.295972273587,
"area_90": 10523.903017302822,
"duration": 0.029856,
"pipeline": "CWB",
"properties": {},
"instruments": [
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"L1"
],
"significant": false,
"skymap_hash": "204089e0445fbd781913c5f265578279",
"classification": {},
"skymap_version": 0,
"central_frequency": 44.042858
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-05T04:41:42Z",
"superevent_id": "S230805ae",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-05T04:41:44.150431Z",
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"time_created": "2023-08-05T08:05:07Z",
"superevent_id": "S230805ax",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-05T08:05:09.069243Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-05T08:05:09.069266Z",
"modified": "2023-08-05T08:05:09.073191Z",
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{
"id": 1853,
"topic": "igwn.gwalert",
"uuid": "2f8678f9-2f07-4ee4-b97d-a28261365a0b",
"title": "S230805bg - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230805bg/files/bayestar.multiorder.fits,0",
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"far": 4.231099121172271e-06,
"time": "2023-08-05T10:49:14.414Z",
"group": "CBC",
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"area_90": 1255.5832932359056,
"duration": null,
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"sequence_num": 1,
"time_created": "2023-08-05T10:49:39Z",
"superevent_id": "S230805bg",
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},
"message_text": "",
"published": "2023-08-05T10:49:40.113480Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-05T10:49:40.113502Z",
"modified": "2023-08-05T10:49:40.118920Z",
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{
"id": 1854,
"topic": "igwn.gwalert",
"uuid": "36d08519-7218-40d5-ba3f-4e24284e128e",
"title": "S230805bg - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-05T10:54:16Z",
"superevent_id": "S230805bg",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-05T10:54:17.839676Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-05T10:54:17.839697Z",
"modified": "2023-08-05T10:54:17.843153Z",
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{
"id": 1855,
"topic": "gcn.circular",
"uuid": "f92d6d33-ce4a-44a1-a3ff-cd9c34aafdd8",
"title": "GRB 230805B: Swift detection of a burst",
"submitter": "Hop gcn.circular",
"authors": "Jamie Kennea at Penn State U <jak51@psu.edu>",
"data": {
"date": "23/08/05 11:49:08 GMT",
"from": "Jamie Kennea at Penn State U <jak51@psu.edu>",
"title": "GCN CIRCULAR",
"number": "34339",
"subject": "GRB 230805B: Swift detection of a burst"
},
"message_text": "\nS. B. Cenko (GSFC), A. D'Ai (INAF-IASFPA),\nV. D'Elia (SSDC & INAF-OAR), J.D. Gropp (PSU), J. A. Kennea (PSU),\nH. A. Krimm (NSF), N. P. M. Kuin (UCL-MSSL), S. Laha (GSFC/UMBC) and\nM. H. Siegel (PSU) report on behalf of the Neil Gehrels Swift\nObservatory Team:\n\nAt 11:23:51 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 230805B (trigger\u001183217). Swift slewed immediately to the burst.\nThe BAT on-board calculated location is\nRA, Dec 207.747, +31.185 which is\n RA(J2000) = 13h 50m 59s\n Dec(J2000) = +31d 11' 05\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including\nsystematic uncertainty). The BAT light curve showed a complex\nstructure with a duration of about 60 sec. The peak count rate\nwas ~1300 counts/sec (15-350 keV), at ~5 sec after the trigger.\n\nThe XRT began observing the field at 11:27:03.3 UT, 192.3 seconds after\nthe BAT trigger. Using promptly downlinked data we find a fading,\nuncatalogued X-ray source with an enhanced position: RA, Dec 207.74281,\n31.19102 which is equivalent to:\n RA(J2000) = 13h 50m 58.28s\n Dec(J2000) = +31d 11' 27.7\"\nwith an uncertainty of 1.9 arcseconds (radius, 90% containment). This\nlocation is 25 arcseconds from the BAT onboard position, within the BAT\nerror circle. This position may be improved as more data are received;\nthe latest position is available at https://www.swift.ac.uk/sper.\n\nA power-law fit to a spectrum formed from promptly downlinked event\ndata gives a column density in excess of the Galactic value (1.41 x\n10^20 cm^-2, Willingale et al. 2013), with an excess column of 3.6\n(+2.86/-2.45) x 10^21 cm^-2 (90% confidence).\n\nUVOT took a finding chart exposure of 150 seconds with the White filter\nstarting 858 seconds after the BAT trigger. No credible afterglow candidate has\nbeen found in the initial data products. The 2.7'x2.7' sub-image covers 100% of\nthe XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag.\nThe 8'x8' region for the list of sources generated on-board covers 100% of the\nXRT error circle. The list of sources is typically complete to about 18 mag. No\ncorrection has been made for the expected extinction corresponding to E(B-V) of\n0.014.\n\nBurst Advocate for this burst is S. B. Cenko (brad.cenko AT nasa.gov).\nPlease contact the BA by email if you require additional information\nregarding Swift followup of this burst. In extremely urgent cases, after\ntrying the Burst Advocate, you can contact the Swift PI by phone (see\nSwift TOO web site for information: http://www.swift.psu.edu/)\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMjM2MTU0LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.xtpAbvBGrD5yIuP8wiu0xhwwWwGjsaY2GqXur_2e1dg\n\n",
"published": "2023-08-05T11:49:19.486246Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-05T11:49:19.486263Z",
"modified": "2023-08-05T11:49:19.492523Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1856,
"topic": "igwn.gwalert",
"uuid": "0048c354-d5ac-4cc0-b399-779122c17c7f",
"title": "S230805bm - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
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"gracedb": "https://gracedb.ligo.org/superevents/S230805bm/view/"
},
"event": {
"far": 1.3366e-05,
"time": "2023-08-05T11:59:27.823Z",
"group": "Burst",
"search": "AllSky",
"area_50": 78.89360264984973,
"area_90": 313.0565296637653,
"duration": 0.015128,
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"sequence_num": 1,
"time_created": "2023-08-05T12:01:05Z",
"superevent_id": "S230805bm",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-05T12:01:06.201292Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-05T12:01:06.201311Z",
"modified": "2023-08-05T12:01:06.207226Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1857,
"topic": "igwn.gwalert",
"uuid": "86da4e98-7501-48f0-b63b-7e19fee475f1",
"title": "S230805bm - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230805bm/files/cwb.multiorder.fits,1",
"gracedb": "https://gracedb.ligo.org/superevents/S230805bm/view/"
},
"event": {
"far": 2.73048e-07,
"time": "2023-08-05T11:59:27.816Z",
"group": "Burst",
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"area_90": 11616.873166779065,
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"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-05T12:05:41Z",
"superevent_id": "S230805bm",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-05T12:05:43.038478Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-05T12:05:43.038500Z",
"modified": "2023-08-05T12:05:43.042205Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1858,
"topic": "igwn.gwalert",
"uuid": "673494a4-a47f-498d-9ec5-34ef9f11cdf0",
"title": "S230805x - UPDATE",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230805x/files/bayestar.multiorder.fits,2",
"gracedb": "https://gracedb.ligo.org/superevents/S230805x/view/"
},
"event": {
"far": 9.185882942507167e-09,
"time": "2023-08-05T03:42:49.972Z",
"group": "CBC",
"search": "AllSky",
"area_50": 738.1587609632213,
"area_90": 2093.827821390559,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.0,
"HasRemnant": 0.0
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"instruments": [
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"L1"
],
"significant": true,
"skymap_hash": "bfc3006109cee68141780fa5ecbecd2c",
"classification": {
"BBH": 0.9997500609143566,
"BNS": 0.0,
"NSBH": 0.0,
"Terrestrial": 0.0002499390856434136
},
"skymap_version": 2,
"central_frequency": null
},
"alert_type": "UPDATE",
"sequence_num": 4,
"time_created": "2023-08-05T12:51:04Z",
"superevent_id": "S230805x",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-05T12:51:05.628174Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-05T12:51:05.628194Z",
"modified": "2023-08-05T12:51:05.632553Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1859,
"topic": "gcn.circular",
"uuid": "6284ab91-b75d-47d7-aad1-c5f6f636a9cd",
"title": "LIGO/Virgo/KAGRA S230805x: Updated Sky localization",
"submitter": "Hop gcn.circular",
"authors": "John Veitch at U of Glasgow <john.veitch@ligo.org>",
"data": {
"date": "23/08/05 12:55:52 GMT",
"from": "John Veitch at U of Glasgow <john.veitch@ligo.org>",
"title": "GCN CIRCULAR",
"number": "34340",
"subject": "LIGO/Virgo/KAGRA S230805x: 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 S230805x (GCN Circular 34337). 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:\nhttps://gracedb.ligo.org/superevents/S230805x\n\nFor the Bilby.multiorder.fits,0 sky map, the 90% credible region is 2094 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 3305 +/- 1113 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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMjQwMTU3LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.RL0svDHKsPG6NvBpCCR4H9g8iUthRjN2DXSt3bgC6wU\n\n",
"published": "2023-08-05T12:56:02.332547Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-05T12:56:02.332564Z",
"modified": "2023-08-05T12:56:02.335945Z",
"nonlocalizedevents": [
{
"event_id": "S230805x"
}
],
"targets": []
},
{
"id": 1860,
"topic": "igwn.gwalert",
"uuid": "435b73b9-3bf5-4d1c-93bb-b2526c4c9959",
"title": "S230805bo - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230805bo/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230805bo/view/"
},
"event": {
"far": 1.803854006241028e-05,
"time": "2023-08-05T13:38:45.945Z",
"group": "CBC",
"search": "AllSky",
"area_50": 474.8303797782177,
"area_90": 1768.3917104599288,
"duration": null,
"pipeline": "pycbc",
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"NSBH": 0.0,
"Terrestrial": 0.9971477377165097
},
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},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-05T13:39:09Z",
"superevent_id": "S230805bo",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-05T13:39:10.742619Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-05T13:39:10.742641Z",
"modified": "2023-08-05T13:39:10.746375Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1861,
"topic": "igwn.gwalert",
"uuid": "e05b79e5-f4a1-4eb0-bd25-1f30f0732769",
"title": "S230805bo - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230805bo/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230805bo/view/"
},
"event": {
"far": 1.803854006241028e-05,
"time": "2023-08-05T13:38:45.945Z",
"group": "CBC",
"search": "AllSky",
"area_50": 474.8303797782177,
"area_90": 1768.3917104599288,
"duration": null,
"pipeline": "pycbc",
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"significant": false,
"skymap_hash": "5f36c35122459f8e917d941965e626b8",
"classification": {
"BBH": 0.0,
"BNS": 0.0028522622834903457,
"NSBH": 0.0,
"Terrestrial": 0.9971477377165097
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-05T13:43:45Z",
"superevent_id": "S230805bo",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-05T13:43:47.493032Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-05T13:43:47.493054Z",
"modified": "2023-08-05T13:43:47.496690Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1862,
"topic": "gcn.circular",
"uuid": "caa67e98-7687-499e-8141-0c3f11c22ef9",
"title": "Swift GRB 230805B: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/08/05 17:03:02 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "34341",
"subject": "Swift GRB 230805B: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the Swift GRB 230805B ( S. B. Cenko et al., GCN 34339) errorbox 19680 sec after notice time and 19762 sec after trigger time at 2023-08-05 16:53:13 UT, with upper limit up to 16.6 mag. Observations started at twilight. The observations began at zenith distance = 66 deg. The sun altitude is -10.7 deg.\n\nThe galactic latitude b = 76 deg., longitude l = 52 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"50484\n\nWe obtain a following upper limits.\n\nTmid-T0 | Site |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____|_______|______|________\n\n 19853 | MASTER-SAAO | C | 180 | 16.6 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMjU0OTg3LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.65vNIZNbf9L1_PmUyfTmBHRpB5NdGY6QQWLrIHPSeCI\n\n",
"published": "2023-08-05T17:03:18.182340Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-05T17:03:18.182392Z",
"modified": "2023-08-05T17:03:18.187704Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1863,
"topic": "gcn.circular",
"uuid": "69f41f29-b05a-46eb-9d40-70b0b4aeef64",
"title": "Fermi trigger No 712927418: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/08/05 18:00:37 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "34342",
"subject": "Fermi trigger No 712927418: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB230805.47 (trigger No 712927418,13h 53m 57.60s , +32d 30m 00.0s, R=9.1) errorbox 19746 sec after notice time and 19780 sec after trigger time at 2023-08-05 16:53:13 UT, with upper limit up to 18.4 mag. Observations started at twilight. The observations began at zenith distance = 66 deg. The sun altitude is -10.7 deg.\n\nThe galactic latitude b = 75 deg., longitude l = 57 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"50503\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 19870 | 2023-08-05 16:53:13 | MASTER-SAAO | (13h 50m 08.41s , +31d 15m 33.0s) | C | 180 | 16.6 |\n 19870 | 2023-08-05 16:53:13 | MASTER-SAAO | (13h 51m 07.23s , +31d 18m 27.8s) | C | 180 | 16.6 |\n 20082 | 2023-08-05 16:56:45 | MASTER-SAAO | (13h 50m 13.94s , +31d 14m 47.3s) | C | 180 | 17.1 |\n 20082 | 2023-08-05 16:56:45 | MASTER-SAAO | (13h 51m 12.86s , +31d 17m 41.0s) | C | 180 | 16.8 |\n 20262 | 2023-08-05 16:56:45 | MASTER-SAAO | (13h 51m 12.85s , +31d 17m 40.7s) | C | 540 | 17.6 | Coadd\n 20293 | 2023-08-05 17:00:16 | MASTER-SAAO | (13h 50m 08.93s , +31d 13m 56.4s) | C | 180 | 17.5 |\n 20473 | 2023-08-05 17:00:16 | MASTER-SAAO | (13h 50m 08.93s , +31d 13m 56.4s) | C | 540 | 18.4 | Coadd\n 20293 | 2023-08-05 17:00:16 | MASTER-SAAO | (13h 51m 07.93s , +31d 16m 48.8s) | C | 180 | 17.2 |\n 20492 | 2023-08-05 17:03:35 | MASTER-SAAO | (13h 50m 13.39s , +31d 14m 06.4s) | C | 180 | 17.5 |\n 20492 | 2023-08-05 17:03:35 | MASTER-SAAO | (13h 51m 12.37s , +31d 16m 57.5s) | C | 180 | 17.3 |\n 20704 | 2023-08-05 17:07:07 | MASTER-SAAO | (13h 50m 11.18s , +31d 15m 51.3s) | C | 180 | 18.0 |\n 20704 | 2023-08-05 17:07:07 | MASTER-SAAO | (13h 51m 10.30s , +31d 18m 41.3s) | C | 180 | 17.6 |\n 20884 | 2023-08-05 17:07:07 | MASTER-SAAO | (13h 51m 10.31s , +31d 18m 41.1s) | C | 540 | 18.3 | Coadd\n 20915 | 2023-08-05 17:10:38 | MASTER-SAAO | (13h 50m 11.16s , +31d 14m 43.3s) | C | 180 | 18.0 |\n 20915 | 2023-08-05 17:10:38 | MASTER-SAAO | (13h 51m 10.35s , +31d 17m 32.7s) | C | 180 | 17.7 |\n 21127 | 2023-08-05 17:14:10 | MASTER-SAAO | (13h 50m 14.73s , +31d 16m 03.7s) | C | 180 | 18.4 |\n 21127 | 2023-08-05 17:14:10 | MASTER-SAAO | (13h 51m 13.94s , +31d 18m 52.3s) | C | 180 | 18.0 |\n 22419 | 2023-08-05 17:35:42 | MASTER-SAAO | (13h 50m 14.66s , +31d 16m 54.5s) | C | 180 | 17.5 |\n 22419 | 2023-08-05 17:35:42 | MASTER-SAAO | (13h 51m 13.23s , +31d 19m 38.7s) | C | 180 | 17.4 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMjU4NDQzLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.vlTD-G08RxIG_cY-LEbOIPmsQKXmwa_YvAhYb51g6Tw\n\n",
"published": "2023-08-05T18:00:48.575385Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-05T18:00:48.575414Z",
"modified": "2023-08-05T18:00:48.580313Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1864,
"topic": "gcn.circular",
"uuid": "464079f5-6392-49da-9871-041ddcf45d36",
"title": "GRB 230805B: SAO RAS optical observations",
"submitter": "Hop gcn.circular",
"authors": "Moskvitin Alexander at SAO RAS <mosk@sao.ru>",
"data": {
"date": "23/08/05 20:40:08 GMT",
"from": "Moskvitin Alexander at SAO RAS <mosk@sao.ru>",
"title": "GCN CIRCULAR",
"number": "34343",
"subject": "GRB 230805B: SAO RAS optical observations"
},
"message_text": "A. S. Moskvitin (SAO RAS) and V. P. Goranskij (SAI MSU) report\non behalf of a larger collaboration.\n\nWe observed the field of the GRB 230805B (Cenko et al., GCNC #34339)\nwith the 1-m telescope of SAO RAS Zeiss-1000 equipped with the\nMulti-Mode Photometer-Polarimeter (MMPP). We obtained 4 x 300 sec.\nexposures in Rc band on August 5, 17:50:15--18:11:48 UT.\n\nWithin the XRT error circle we marginally detected a single object\n(possible OT) with coordinates (Epoch = 2000.0):\nR.A. = 13:50:58.2, Dec. = +31:11:28.6 (+/- 0\".5)\nand brightness about R = 22.7 +/- 0.3 (t_mid - t0 = 6.61 hours).\n\nThis preliminary photometry is based on the nearby SDSS stars;\nmagnitudes are converted using Lupton (2005) equations.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMjY4MDE0LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.mvQxiJKhxKSKquGCdoxnPgQpDV2quz2CC0KJ9mG6biw\n\n",
"published": "2023-08-05T20:40:19.683877Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-05T20:40:19.683900Z",
"modified": "2023-08-05T20:40:19.691050Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1865,
"topic": "gcn.circular",
"uuid": "044ba0a3-7595-4381-b4b1-5c66bee1d503",
"title": "Fermi GRB 230805A: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/08/05 20:45:51 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "34344",
"subject": "Fermi GRB 230805A: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-Tunka robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the Fermi GRB 230805A ( Fermi GBM team, GCN 34338) errorbox 23358 sec after notice time and 23391 sec after trigger time at 2023-08-05 13:46:07 UT, with upper limit up to 14.1 mag. Observations started at twilight. The observations began at zenith distance = 76 deg. The sun altitude is -8.4 deg.\n\nThe galactic latitude b = -9 deg., longitude l = 145 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"50244\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 23421 | 2023-08-05 13:46:07 | MASTER-Tunka | (02h 45m 41.38s , +46d 10m 48.2s) | C | 60 | 14.1 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMjY4MzU2LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.aMGOxShudFxIqceYSGJwBqmHQsZ9zGtpLz67rZCwcOA\n\n",
"published": "2023-08-05T20:46:00.504881Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-05T20:46:00.504906Z",
"modified": "2023-08-05T20:46:00.509907Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1866,
"topic": "gcn.circular",
"uuid": "bf913694-bc76-4afa-8ba2-e47b39faaa5d",
"title": "GRB 230805B: Swift-XRT refined Analysis",
"submitter": "Hop gcn.circular",
"authors": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"data": {
"date": "23/08/05 21:19:54 GMT",
"from": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"title": "GCN CIRCULAR",
"number": "34345",
"subject": "GRB 230805B: Swift-XRT refined Analysis"
},
"message_text": "A. D'Ai (INAF-IASFPA), A. Melandri (INAF-OAR), T. Sbarrato (INAF-OAB),\nS. Dichiara (PSU), J.A. Kennea (PSU), A. Tohuvavohu (U. Toronto), J.P.\nOsborne (U. Leicester), K.L. Page (U. Leicester) and P.A. Evans report\non behalf of the Swift-XRT team:\n\nWe have analysed 6.0 ks of XRT data for GRB 230805B, from 210 s to 25.0\nks after the BAT trigger. The data are entirely in Photon Counting\n(PC) mode. The best available XRT position (using the promptly\ndownlinked event data, the XRT-UVOT alignment and matching UVOT field\nsources to the USNO-B1 catalogue) is RA, Dec = 207.74271, 31.19102\nwhich is equivalent to:\n\nRA (J2000): 13 50 58.25\nDec(J2000): +31 11 27.7\n\nwith an uncertainty of 1.9 arcsec (radius, 90% confidence).\n\nThe light curve can be modelled with a series of power-law decays. The\ninitial decay index is alpha=3.7 (+0.9, -0.4). At T+650 s the decay\nflattens to an alpha of -0.22 (+0.72, -0.08) before breaking again at\nT+4027 s to a final decay with index alpha=1.7 (+0.6, -0.5).\n\nA spectrum formed from the PC mode data can be fitted with an absorbed\npower-law with a photon spectral index of 1.76 (+0.26, -0.24). The\nbest-fitting absorption column is 8.9 (+7.5, -6.2) x 10^20 cm^-2, in\nexcess of the Galactic value of 1.4 x 10^20 cm^-2 (Willingale et al.\n2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion\nfactor deduced from this spectrum is 3.8 x 10^-11 (4.4 x 10^-11) erg\ncm^-2 count^-1.\n\nA summary of the PC-mode spectrum is thus:\nTotal column:\t 8.9 (+7.5, -6.2) x 10^20 cm^-2\nGalactic foreground: 1.4 x 10^20 cm^-2\nExcess significance: 2.0 sigma\nPhoton index:\t 1.76 (+0.26, -0.24)\n\nIf the light curve continues to decay with a power-law decay index of\n1.7, the count rate at T+24 hours will be 5.6 x 10^-4 count s^-1,\ncorresponding to an observed (unabsorbed) 0.3-10 keV flux of 2.1 x\n10^-14 (2.5 x 10^-14) erg cm^-2 s^-1.\n\nThe results of the XRT-team automatic analysis are available at\nhttp://www.swift.ac.uk/xrt_products/01183217.\n\nThis circular is an official product of the Swift-XRT team.\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMjcwNDAwLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.Snypt_rO_nIs6Eat0qnjn99RxzKWyWp-Mony5GdVsbY\n\n",
"published": "2023-08-05T21:20:05.690910Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-05T21:20:05.690931Z",
"modified": "2023-08-05T21:20:05.695572Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1867,
"topic": "igwn.gwalert",
"uuid": "59847e97-8222-40ce-afbd-ba5529d3fcc9",
"title": "S230805cj - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230805cj/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230805cj/view/"
},
"event": {
"far": 1.213851101056207e-05,
"time": "2023-08-05T22:08:16.212Z",
"group": "CBC",
"search": "AllSky",
"area_50": 2771.3476164872736,
"area_90": 8906.584162980906,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 0.18364594723877947,
"HasMassGap": 0.12023427955959926,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "0331bc0a95e78d6f39aaa9c3ef54406e",
"classification": {
"BBH": 0.12728848932203887,
"BNS": 0.0,
"NSBH": 0.016100308398196327,
"Terrestrial": 0.8566112022797648
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-05T22:08:40Z",
"superevent_id": "S230805cj",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-05T22:08:42.923295Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-05T22:08:42.923319Z",
"modified": "2023-08-05T22:08:42.931325Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1868,
"topic": "igwn.gwalert",
"uuid": "e09dbad7-4f17-4591-9e1c-3e504ff4dd7b",
"title": "S230805cj - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230805cj/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230805cj/view/"
},
"event": {
"far": 1.213851101056207e-05,
"time": "2023-08-05T22:08:16.212Z",
"group": "CBC",
"search": "AllSky",
"area_50": 2771.3476164872736,
"area_90": 8906.584162980906,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 0.18364594723877947,
"HasMassGap": 0.12023427955959926,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "0331bc0a95e78d6f39aaa9c3ef54406e",
"classification": {
"BBH": 0.12728848932203887,
"BNS": 0.0,
"NSBH": 0.016100308398196327,
"Terrestrial": 0.8566112022797648
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-05T22:13:15Z",
"superevent_id": "S230805cj",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-05T22:13:16.336265Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-05T22:13:16.336284Z",
"modified": "2023-08-05T22:13:16.341748Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1869,
"topic": "gcn.circular",
"uuid": "73a73eab-8696-4bc8-aa1c-b19fbc4eb44f",
"title": "GRB 230805B: NOT optical afterglow confirmation",
"submitter": "Hop gcn.circular",
"authors": "Daniele B. Malesani at IMAPP / Radboud University <d.malesani@astro.ru.nl>",
"data": {
"date": "23/08/05 22:58:50 GMT",
"from": "Daniele B. Malesani at IMAPP / Radboud University <d.malesani@astro.ru.nl>",
"title": "GCN CIRCULAR",
"number": "34346",
"subject": "GRB 230805B: NOT optical afterglow confirmation"
},
"message_text": "D. B. Malesani (Radboud Univ. and DAWN/NBI) and T. Pursimo (NOT) report on behalf of a larger collaboration:\n\nWe observed the location of GRB 230805B (Cenko et al., GCN 34339) using the Nordic Optical Telescope (NOT) equipped with the ALFOSC camera. Observations were secured in the r and z bands. An object with position consistent with the one reported by Moskvitin & Goranskij (GCN 34343) is well detected in our data. Based on nearby stars from the Gaia catalog, we measure the following J2000 coordinates, with an error of ~0.3\":\n\nRA = 13:50:58.23\nDec = +31:11:28.6\n\nAt a mean epoch 2023 Aug 5.91 UT (10.4 hr after the trigger), we measure a preliminary magnitude (calibrated against nearby Pan-STARRS point-like sources) r = 23.5 +- 0.15 AB. Compared to the measurement by Moskvitin & Goranskij (GCN 34343), our magnitude value provides 2-sigma evidence for fading, consistent with afterglow behavior.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMjc2MzM1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.9wBQOh8vVAH0B9WfmrkrFbSm-3gjLoBGoqZmrGYpoC4\n\n",
"published": "2023-08-05T22:59:01.557646Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-05T22:59:01.557663Z",
"modified": "2023-08-05T22:59:01.564927Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1870,
"topic": "gcn.circular",
"uuid": "23b5c659-a9ca-4a17-b314-d16c2ada8a73",
"title": "GRB 230805B: BOOTES-6/DPRT optical upper limit and 1.5m OSN detection",
"submitter": "Hop gcn.circular",
"authors": "Youdong HU at IAA-CSIC <huyoudong072@hotmail.com>",
"data": {
"date": "23/08/06 03:15:01 GMT",
"from": "Youdong HU at IAA-CSIC <huyoudong072@hotmail.com>",
"title": "GCN CIRCULAR",
"number": "34347",
"subject": "GRB 230805B: BOOTES-6/DPRT optical upper limit and 1.5m OSN detection"
},
"message_text": "Y.-D. Hu, I. Perez-Garcia, E. Fernandez-Garcia, A. J. Castro-Tirado, M.D. Caballero-Garcia, R. Sanchez-Ramirez, S. Guziy and F. J. Aceituno (IAA-CSIC), P. J. Meintjes and H. Van Heerden (UFS, SouthAfrica), A. Martin-Carrillo and L. Hanlon (UCD, Ireland), M. Gritsevich (Univ. of Helsinki) and C. J. Perez del Pulgar (UMA), on behalf of a larger collaboration, report:\n\nFollowing the detection of GRB 230805B by Swift (Cenko et al. GCNC 34339), the BOOTES-6/DPRT 0.6m robotic telescope at Boyden Observatory in Maselspoort (South Africa) automatically observed the GRB location starting on Aug. 05, 17:15 UT (~ 5.9 h after trigger). No new optical source is detected on the co-added image (7 x 60 s, clear filter) within the enhanced Swift/XRT error region (D'Ai et al. GCNC 34345) down to 19.9 mag.\n\nWe also triggered the 1.5m telescope at Observatorio de Sierra Nevada in Granada (Spain), starting on Aug. 05, 20:30 UT (~ 9.1 h after trigger). At the position of the suggested optical afterglow reported by Moskvitin and Goranskij (GCNC 34343) we found a faint optical source for which we preliminary measure I = 22.9+/-0.4 (on a 12 x 150s co-added image), consistent with the fading reported by Malesani and Pursimo in the r-band (GCNC 34346).\n\nWe thank both the staff at Boyden and Sierra Nevada Observatories for their excellent support.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMjkxNzA2LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.WeS-uk-Foxifaprus8c02W_bCflz9EOaYrv1Gw3joVI\n\n",
"published": "2023-08-06T03:15:12.051421Z",
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"created": "2023-08-06T03:15:12.051437Z",
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"title": "S230806f - PRELIMINARY",
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"data": {
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{
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"title": "S230806f - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
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"data": {
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"published": "2023-08-06T04:11:28.803983Z",
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"published": "2023-08-06T04:47:42.785113Z",
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"topic": "igwn.gwalert",
"uuid": "fd13736e-ab34-4fc8-b60d-0e9be0312084",
"title": "S230806h - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"published": "2023-08-06T04:52:16.457341Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
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{
"id": 1875,
"topic": "gcn.circular",
"uuid": "db6a6221-f387-42d1-8aca-6cd39ffb94c1",
"title": "Fermi trigger No 712987357: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/08/06 06:15:38 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "34348",
"subject": "Fermi trigger No 712987357: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB230806.17 (trigger No 712987357,04h 12m 28.80s , -07d 19m 48.0s, R\u0018.1) errorbox 7275 sec after notice time and 7313 sec after trigger time at 2023-08-06 06:04:26 UT, with upper limit up to 16.8 mag. The observations began at zenith distance = 72 deg. The sun altitude is -66.3 deg.\n\nThe galactic latitude b = -38 deg., longitude l = 200 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"50876\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 7404 | 2023-08-06 06:04:26 | MASTER-OAFA | (03h 12m 50.30s , -04d 36m 51.0s) | C | 180 | 16.8 |\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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMzAyNTQzLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.bXLaLGFfRmlqswzJM0HX40T3D774_qn86ihnfDKVugo\n\n",
"published": "2023-08-06T06:15:52.048669Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-06T06:15:52.048686Z",
"modified": "2023-08-06T06:15:52.054909Z",
"nonlocalizedevents": [],
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},
{
"id": 1876,
"topic": "gcn.circular",
"uuid": "75bcc310-1b90-4480-bb11-f6ec6c1bc62f",
"title": "GRB 230805B: Bassano Bresciano observatory upper limit",
"submitter": "Hop gcn.circular",
"authors": "Ulisse Quadri at Bassano Bresciano Obs <oabb@ulisse.bs.it>",
"data": {
"date": "23/08/06 07:04:21 GMT",
"from": "Ulisse Quadri at Bassano Bresciano Obs <oabb@ulisse.bs.it>",
"title": "GCN CIRCULAR",
"number": "34349",
"subject": "GRB 230805B: Bassano Bresciano observatory upper limit"
},
"message_text": "U.Quadri and L.Strabla (Bassano Bresciano Astronomical Observatory),\nin a large collaboration with:\nM.G. Dainotti (National Astronomical Observatory of Japan), \nY. Niino (Tokyo University, Institute of Astronomy), \nK. Kalinowski (Aarhus University, Department of Physics and Astronomy),\nB. De Simone (Universita' degli Studi Di Salerno)\nreport: \n\nWe imaged the field of GRB 230805B detected by SWIFT(trigger 1183217)\nwith the robotic telescope of (IAU station 565) Bassano Bresciano \nObservatory, Italy. Member of: \nAAVSO - American Association of Variable Star Observers.\nUAI/SSV - Unione Astrofili Italiani/sezione stelle variabili.\nGAC - Gruppo Astrofili Cremonesi.\n\nThe observations started 8.74 hour after the GRB trigger, At the end of twilight \nwith our Newton telescope D=250 mm F/D=4.8.\n\nWeather conditions were good.\n\nWe co-added 4 series of 20 exposures of 60 sec each.\n\nStart T0+     End T0+    CR lim\n8.74 hour  10.00 hour     19.5\n\nCR is unfiltered with R zero point\n\nWe did not found any optical counterpart in the error box of the XRTcandidate.\nS. B. Cenko (GSFC) et al. GCN 34339\n\nMagnitudes were estimated with the USNO-B1.0 cat. and \nare not corrected for galactic dust extinction.\n\nReference:\nhttp://www.osservatoriobassano.org/GRB.asp\n\nThe message may be cited.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMzA1NDY3LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.lyvi0NxsQy9W6f6UC4ky8V_Si1JtZbHu1FYuXMovyHw\n\n",
"published": "2023-08-06T07:04:32.394250Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-06T07:04:32.394265Z",
"modified": "2023-08-06T07:04:32.401169Z",
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{
"id": 1877,
"topic": "gcn.circular",
"uuid": "45a06cb5-3553-410c-aeca-cec890e04ac1",
"title": "Fermi trigger No 712991593: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/08/06 08:48:18 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "34350",
"subject": "Fermi trigger No 712991593: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB230806.22 (trigger No 712991593,04h 03m 14.40s , +19d 34m 12.0s, R=2.32) errorbox 229 sec after notice time and 9907 sec after trigger time at 2023-08-06 07:58:16 UT, with upper limit up to 17.2 mag. The observations began at zenith distance = 73 deg. The sun altitude is -43.1 deg.\n\nThe galactic latitude b = -24 deg., longitude l = 173 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"50961\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 9998 | 2023-08-06 07:58:16 | MASTER-OAFA | (04h 01m 44.05s , +19d 29m 23.0s) | C | 180 | 16.9 |\n 10209 | 2023-08-06 08:01:47 | MASTER-OAFA | (04h 01m 43.93s , +19d 30m 23.6s) | C | 180 | 17.2 |\n 10421 | 2023-08-06 08:05:19 | MASTER-OAFA | (04h 01m 48.55s , +19d 29m 24.8s) | C | 180 | 17.1 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMzExNzAzLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.cS1cawxr5fB3V4IhGaNPH04w3x54e16D8ghMBwckxEk\n\n",
"published": "2023-08-06T08:48:29.102811Z",
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"retracted": false,
"created": "2023-08-06T08:48:29.102827Z",
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{
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"title": "S230806t - PRELIMINARY",
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"data": {
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},
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"published": "2023-08-06T11:21:45.515373Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-06T11:21:45.515392Z",
"modified": "2023-08-06T11:21:45.522565Z",
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{
"id": 1879,
"topic": "igwn.gwalert",
"uuid": "43e87b48-8263-4f98-8433-35f5947d8ac7",
"title": "S230806t - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
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"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-06T11:26:17Z",
"superevent_id": "S230806t",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-06T11:26:19.135613Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-06T11:26:19.135633Z",
"modified": "2023-08-06T11:26:19.140838Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1880,
"topic": "igwn.gwalert",
"uuid": "9403309c-2fa5-47b7-a7cf-68a7c587a8ff",
"title": "S230806u - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230806u/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230806u/view/"
},
"event": {
"far": 9.72499924485707e-06,
"time": "2023-08-06T11:35:29.438Z",
"group": "CBC",
"search": "AllSky",
"area_50": 1361.9637627664215,
"area_90": 5195.227663857123,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.05584942834942835,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "7605c1b75c750e78841f63a60dc45178",
"classification": {
"BBH": 0.0008381788751128493,
"BNS": 0.0,
"NSBH": 0.003856470987646243,
"Terrestrial": 0.9953053501372409
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-06T11:35:58Z",
"superevent_id": "S230806u",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-06T11:35:59.368902Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-06T11:35:59.368923Z",
"modified": "2023-08-06T11:35:59.374418Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1881,
"topic": "igwn.gwalert",
"uuid": "98713637-4b98-4514-8c24-56fc6390508f",
"title": "S230806u - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230806u/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230806u/view/"
},
"event": {
"far": 9.72499924485707e-06,
"time": "2023-08-06T11:35:29.438Z",
"group": "CBC",
"search": "AllSky",
"area_50": 1361.9637627664215,
"area_90": 5195.227663857123,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.05584942834942835,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "7605c1b75c750e78841f63a60dc45178",
"classification": {
"BBH": 0.0008381788751128493,
"BNS": 0.0,
"NSBH": 0.003856470987646243,
"Terrestrial": 0.9953053501372409
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-06T11:40:32Z",
"superevent_id": "S230806u",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-06T11:40:33.929286Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-06T11:40:33.929306Z",
"modified": "2023-08-06T11:40:33.934344Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1882,
"topic": "gcn.circular",
"uuid": "1d3686ea-949b-4897-89d8-f8395e610990",
"title": "GRB 230805B: Swift/UVOT Upper Limits",
"submitter": "Hop gcn.circular",
"authors": "Sam LaPorte at PSU <sjl5346@psu.edu>",
"data": {
"date": "23/08/06 18:02:19 GMT",
"from": "Sam LaPorte at PSU <sjl5346@psu.edu>",
"title": "GCN CIRCULAR",
"number": "34351",
"subject": "GRB 230805B: Swift/UVOT Upper Limits"
},
"message_text": "GRB 230805B: Swift/UVOT Upper Limits\n\nS. J. LaPorte (PSU) and S. B. Cenko (GSFC)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 230805B\n196 s after the BAT trigger (Cenko et al., GCN Circ. 34339).\nNo optical afterglow consistent with the XRT position\n(Evans et al., GCN Circ. 34345)\nis detected in the initial UVOT exposures.\nPreliminary 3-sigma upper limits using the UVOT photometric system\n(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first\nfinding chart (FC) exposure and subsequent exposures are:\n\nFilter T_start(s) T_stop(s) Exp(s) Mag\n\nwhite_FC 196 345 147 >20.2\nu_FC 354 604 246 >19.5\nwhite 196 1878 284 >20.7\nv 683 1927 135 >19.0\nb 610 1854 136 >20.4\nu 354 1829 363 >19.6\nw1 732 1804 117 >19.4\nw2 1014 1730 58 >18.8\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.014 in the direction of the burst\n(Schlegel et al. 1998).\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMzQ0OTQ1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.KFiKjtvatGTzsaV3cLj2ZglTID_btU_SLADlC-QLhlA\n\n",
"published": "2023-08-06T18:02:34.663191Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-06T18:02:34.663212Z",
"modified": "2023-08-06T18:02:34.670490Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1883,
"topic": "igwn.gwalert",
"uuid": "7095aa5b-ecde-4029-a0a3-d6aa4d5d0a0e",
"title": "S230806ak - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230806ak/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230806ak/view/"
},
"event": {
"far": 8.915248611831367e-09,
"time": "2023-08-06T20:40:41.939Z",
"group": "CBC",
"search": "AllSky",
"area_50": 792.2932010793418,
"area_90": 3691.2134516387123,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.02944733044733045,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "d8824746f9798698e910790d06a4bd87",
"classification": {
"BBH": 0.9928236433026221,
"BNS": 7.479200166588101e-20,
"NSBH": 5.727717200326568e-18,
"Terrestrial": 0.007176356697377928
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-06T20:41:16Z",
"superevent_id": "S230806ak",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-06T20:41:18.008601Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-06T20:41:18.008624Z",
"modified": "2023-08-06T20:41:18.018130Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1884,
"topic": "igwn.gwalert",
"uuid": "b9fa1bce-263d-4018-a6cb-9ce6e3fb2ff8",
"title": "S230806ak - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230806ak/files/bayestar.multiorder.fits,1",
"gracedb": "https://gracedb.ligo.org/superevents/S230806ak/view/"
},
"event": {
"far": 2.958345677553754e-09,
"time": "2023-08-06T20:40:41.938Z",
"group": "CBC",
"search": "AllSky",
"area_50": 813.6951890322265,
"area_90": 3749.124713158283,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.02944733044733045,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "f9c9a0e5a2c49f09299de1564dcdf042",
"classification": {
"BBH": 0.9974244087713245,
"BNS": 6.68974377854143e-20,
"NSBH": 2.678582929871309e-09,
"Terrestrial": 0.0025755885500925446
},
"skymap_version": 1,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-06T20:45:59Z",
"superevent_id": "S230806ak",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-06T20:46:00.724474Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-06T20:46:00.724508Z",
"modified": "2023-08-06T20:46:00.730160Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1885,
"topic": "igwn.gwalert",
"uuid": "a4d5ffa8-5cc2-4794-98dd-820e2d16310d",
"title": "S230806ak - INITIAL",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230806ak/files/bayestar.multiorder.fits,1",
"gracedb": "https://gracedb.ligo.org/superevents/S230806ak/view/"
},
"event": {
"far": 2.958345677553754e-09,
"time": "2023-08-06T20:40:41.938Z",
"group": "CBC",
"search": "AllSky",
"area_50": 813.6951890322265,
"area_90": 3749.124713158283,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.02944733044733045,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "f9c9a0e5a2c49f09299de1564dcdf042",
"classification": {
"BBH": 0.9808375904768494,
"BNS": 5.7962854931910026e-11,
"NSBH": 3.050659316362472e-06,
"Terrestrial": 0.019159358805871197
},
"skymap_version": 1,
"central_frequency": null
},
"alert_type": "INITIAL",
"sequence_num": 3,
"time_created": "2023-08-06T21:07:04Z",
"superevent_id": "S230806ak",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-06T21:07:05.307664Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-06T21:07:05.307686Z",
"modified": "2023-08-06T21:07:05.314826Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1886,
"topic": "gcn.circular",
"uuid": "c54c2468-331f-457e-ac79-e8f437716319",
"title": "LIGO/Virgo/KAGRA S230806ak: Identification of a GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "Dripta Bhattacharjee <dripta.bhattacharjee@ligo.org>",
"data": {
"date": "23/08/06 21:27:57 GMT",
"from": "Dripta Bhattacharjee <dripta.bhattacharjee@ligo.org>",
"title": "GCN CIRCULAR",
"number": "34352",
"subject": "LIGO/Virgo/KAGRA S230806ak: 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 S230806ak during\nreal-time processing of data from LIGO Hanford Observatory (H1) and\nLIGO Livingston Observatory (L1) at 2023-08-06 20:40:41.938 UTC (GPS\ntime: 1375389659.938). The candidate was found by the CWB [1], GstLAL\n[2], MBTA [3], PyCBC Live [4], and SPIIR [5] analysis pipelines.\n\nS230806ak is an event of interest because its false alarm rate, as\nestimated by the online analysis, is 3e-09 Hz, or about one in 10\nyears. The event's properties can be found at this URL:\n\nhttps://gracedb.ligo.org/superevents/S230806ak\n\nThe classification of the GW signal, in order of descending\nprobability, is BBH (>99%), Terrestrial (<1%), NSBH (<1%), or BNS (<1%).\n\nAssuming the candidate is astrophysical in origin, the probability\nthat the lighter compact object is consistent with a neutron star mass\n(HasNS) is <1%. [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 3%.\n\nTwo sky maps are available at this time and can be retrieved from the\nGraceDB event page:\n * bayestar.multiorder.fits,1, an initial localization generated by\nBAYESTAR [7], distributed via GCN notice about 35 seconds after the\ncandidate event time.\n * bayestar.multiorder.fits,2, an initial localization generated by\nBAYESTAR [7], distributed via GCN notice about 5 minutes after the\ncandidate event time.\n\nThe preferred sky map at this time is bayestar.multiorder.fits,2. For\nthe bayestar.multiorder.fits,2 sky map, the 90% credible region is\n3749 deg2. Marginalized over the whole sky, the a posteriori\nluminosity distance estimate is 4578 +/- 1473 Mpc (a posteriori mean\n+/- standard deviation).\n\nFor further information about analysis methodology and the contents of\nthis alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide\nhttps://emfollow.docs.ligo.org/userguide/.\n\n [1] Klimenko et al. PRD 93, 042004 (2016)\n [2] Tsukada et al. arXiv:2305.06286 (2023) and Ewing et al.\narXiv:2305.05625 (2023)\n [3] Aubin et al. CQG 38, 095004 (2021)\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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMzU3MjgyLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.7uGFsn4SRzNGy7QZnzDlUspLuKGUeCwY2W2IzQrzznE\n\n",
"published": "2023-08-06T21:28:08.056763Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-06T21:28:08.056779Z",
"modified": "2023-08-06T21:28:08.063889Z",
"nonlocalizedevents": [
{
"event_id": "S230806a"
}
],
"targets": []
},
{
"id": 1887,
"topic": "gcn.circular",
"uuid": "ca133597-c8ce-42d7-8ebc-3ff35161e248",
"title": "GRB 230805B: Enhanced Swift-XRT position",
"submitter": "Hop gcn.circular",
"authors": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"data": {
"date": "23/08/06 21:46:11 GMT",
"from": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"title": "GCN CIRCULAR",
"number": "34353",
"subject": "GRB 230805B: Enhanced Swift-XRT position"
},
"message_text": "J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester)\nreport on behalf of the Swift-XRT team.\n\nUsing 3447 s of XRT Photon Counting mode data and 3 UVOT\nimages for GRB 230805B, we find an astrometrically corrected X-ray\nposition (using the XRT-UVOT alignment and matching UVOT field sources\nto the USNO-B1 catalogue): RA, Dec = 207.74318, +31.19135 which is equivalent\nto:\n\nRA (J2000): 13h 50m 58.36s\nDec (J2000): +31d 11' 28.8\"\n\nwith an uncertainty of 2.1 arcsec (radius, 90% confidence).\n\nThis position may be improved as more data are received. The latest\nposition can be viewed at http://www.swift.ac.uk/xrt_positions. Position\nenhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans\net al. (2009, MNRAS, 397, 1177).\n\nThis circular was automatically generated, and is an official product of the\nSwift-XRT team.\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMzU4Mzc3LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.9bpXai2w4NPymYihSvzgrFpIBlTXRzeZAA-9MRtd844\n\n",
"published": "2023-08-06T21:46:22.471663Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-06T21:46:22.471680Z",
"modified": "2023-08-06T21:46:22.477603Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1888,
"topic": "hermes.message",
"uuid": "dcc8118c-15cd-4e4c-9458-8e1bdf9a196f",
"title": "INTEGRAL follow-up of S230806ak",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230806ak at 2023-08-06T20:40:41.000\n\n\nSPI-ACS excesses:\nat T0+-170.76 FAP = 0.578\n\n\n\n\nnext break in data in 23 hr: 2023-08-07T19:53:51, for 9.3 hr",
"published": "2023-08-06T21:49:30.764917Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-08-06T21:49:30.764933Z",
"modified": "2023-08-06T21:49:30.769829Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1889,
"topic": "gcn.circular",
"uuid": "427964b3-8ce3-4f9a-896a-b0404f9f5e90",
"title": "GRB 230806A: Fermi GBM Final Localization",
"submitter": "Hop gcn.circular",
"authors": "Peter Veres at University of Alabama in Huntsville <veresp@gmail.com>",
"data": {
"date": "23/08/07 00:36:33 GMT",
"from": "Peter Veres at University of Alabama in Huntsville <veresp@gmail.com>",
"title": "GCN CIRCULAR",
"number": "34354",
"subject": "GRB 230806A: Fermi GBM Final Localization"
},
"message_text": "\nThe Fermi GBM team reports the detection of a likely SHORT GRB\n\n\"At 04:02:32.37 UT on 06 August 2023, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 230806A (trigger 712987357/230806168).\n\nThe on-ground calculated location, using the Fermi GBM trigger data,\nis RA = 63.12, Dec = -7.33 (J2000 degrees, equivalent to J2000 4h 12m, -7d 19'),\nwith a statistical uncertainty of 18.10 degrees.\n\nThe angle from the Fermi LAT boresight is 64 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230806168/quicklook/glg_skymap_all_bn230806168.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/bn230806168/quicklook/glg_healpix_all_bn230806168.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230806168/quicklook/glg_lc_medres34_bn230806168.gif\"\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMzY4NTk4LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.1dsXP4E3_VmlDBWwW68ufVB_f-yN33xdq0SK_QK-eG0\n\n",
"published": "2023-08-07T00:36:44.452968Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-07T00:36:44.452985Z",
"modified": "2023-08-07T00:36:44.458943Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1890,
"topic": "igwn.gwalert",
"uuid": "4c3d5fc8-577d-4463-9cd9-0936bdc3c5a5",
"title": "S230806ak - UPDATE",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230806ak/files/bayestar.multiorder.fits,2",
"gracedb": "https://gracedb.ligo.org/superevents/S230806ak/view/"
},
"event": {
"far": 2.958345677553754e-09,
"time": "2023-08-06T20:40:41.938Z",
"group": "CBC",
"search": "AllSky",
"area_50": 790.6146137889192,
"area_90": 3714.713673704625,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.0,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "0ac6607ded2309dc8adb0185976f6d5d",
"classification": {
"BBH": 0.9974244087713245,
"BNS": 6.68974377854143e-20,
"NSBH": 2.678582929871309e-09,
"Terrestrial": 0.0025755885500925446
},
"skymap_version": 2,
"central_frequency": null
},
"alert_type": "UPDATE",
"sequence_num": 4,
"time_created": "2023-08-07T00:58:05Z",
"superevent_id": "S230806ak",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-07T00:58:07.149547Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-07T00:58:07.149566Z",
"modified": "2023-08-07T00:58:07.154589Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1891,
"topic": "gcn.circular",
"uuid": "8653c9b6-d17d-4e92-a9ca-57e84f49aec7",
"title": "LIGO/Virgo/KAGRA S230806ak: Updated Sky localization and EM Bright Classification",
"submitter": "Hop gcn.circular",
"authors": "carl.haster@unlv.edu",
"data": {
"date": "23/08/07 01:03:02 GMT",
"from": "carl.haster@unlv.edu",
"title": "GCN CIRCULAR",
"number": "34355",
"subject": "LIGO/Virgo/KAGRA S230806ak: 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 S230806ak (GCN Circular 34352). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.offline0.multiorder.fits,0, distributed via GCN Notice, is available for retrieval from the GraceDB event page:\n\nhttps://gracedb.ligo.org/superevents/S230806ak\n\nBased on posterior support from parameter estimation [1], under the assumption that the candidate S230806ak is astrophysical in origin, the probability that the lighter compact object is consistent with a neutron star mass (HasNS) is <1%. [2] Using the masses and spins inferred from the signal, the probability of matter outside the final compact object (HasRemnant) is <1%. [2] Both HasNS and HasRemnant consider the support of several neutron star equations of state. The probability that either of the binary components lies between 3 and 5 solar masses (HasMassgap) is <1%.\n\nFor the Bilby.offline0.multiorder.fits,0 sky map, the 90% credible region is 3715 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 5423 +/- 1862 Mpc (a posteriori mean +/- standard deviation).\n\nFor further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide https://emfollow.docs.ligo.org/userguide/.\n\n\n [1] Ashton et al. ApJS 241, 27 (2019)\n [2] Chatterjee et al. ApJ 896, 54 (2020)\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxMzcwMTg3LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.MXY4pmkh1NzHMkYrQE9ZFz-WTzwHUYTL2ubIualrFro\n\n",
"published": "2023-08-07T01:03:13.912533Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-07T01:03:13.912550Z",
"modified": "2023-08-07T01:03:13.917777Z",
"nonlocalizedevents": [
{
"event_id": "S230806a"
}
],
"targets": []
},
{
"id": 1892,
"topic": "gcn.circular",
"uuid": "ba912779-4be4-4c46-b668-48b49fcba4d7",
"title": "GRB 230805B : OHP/T193 optical upper limit",
"submitter": "Hop gcn.circular",
"authors": "Damien Turpin at CEA-Saclay <dturpin-astro@hotmail.com>",
"data": {
"date": "23/08/07 13:34:31 GMT",
"from": "Damien Turpin at CEA-Saclay <dturpin-astro@hotmail.com>",
"title": "GCN CIRCULAR",
"number": "34356",
"subject": "GRB 230805B : OHP/T193 optical upper limit"
},
"message_text": "D. Turpin (CEA Paris-Saclay), C. Adami (LAM), B. Schneider (MIT),\nE. Le Floc'h, D. Götz, F. Schüssler (CEA Paris-Saclay), A. de Ugarte Postigo (OCA/CNRS),\nS. Basa (LAM), S. D. Vergani (GEPI, Obs. de Paris), report on behalf\nof a larger collaboration:\n\nWe observed the field of GRB 230805B (Cenko et al., GCN 34339; D'Ali et al.,\nGCN 34345; LaPorte et al., GCN 34251; Osborne et al. GCN 34353)\nusing the T193cm telescope at Observatoire de Haute-Provence (France)\nequipped with the MISTRAL spectro-imager. In 5 exposures, obtained\nin the r-band (5x600s) from 2023 05 August 20:36:08 UT to\n21:34:34 UT (mid-time ~9.69h after trigger) under poor seeing conditions,\nwe do not detect any source at the position reported by\nMoskvitin et al., GCN 34343; Malesani et al., GCN 34346; Hu et al., GCN 34347\ndown to the following 5-sigma limit:\n\nr > 21.5 mag (AB)\n\nThe photometric calibration was performed using nearby stars from\nthe PanSTARRS catalog and the magnitude is not corrected for Galactic\nextinction.\n\nWe acknowledge the excellent support from Observatoire de Haute-Provence,\nin particular Jean Balcaen for the MISTRAL observations and\nthe SOPHIE observer Lisa Altinier. \n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxNDE1Mjc2LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.5-aqy2o0vzRNTReu2rbbQhfIT6wTiQ7HtIJ822GieiY\n\n",
"published": "2023-08-07T13:34:47.010888Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-07T13:34:47.010935Z",
"modified": "2023-08-07T13:34:47.019029Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1893,
"topic": "gcn.circular",
"uuid": "591eb919-392b-4591-9204-94cd38ff71a1",
"title": "GRB 230805B: Fermi GBM observation",
"submitter": "Hop gcn.circular",
"authors": "Joe Mangan at IJCLab <joseph.mangan@ijclab.in2p3.fr>",
"data": {
"date": "23/08/07 14:40:05 GMT",
"from": "Joe Mangan at IJCLab <joseph.mangan@ijclab.in2p3.fr>",
"title": "GCN CIRCULAR",
"number": "34357",
"subject": "GRB 230805B: Fermi GBM observation"
},
"message_text": "J.Mangan (CNRS/IJCLab) and C. Meegan (UAH) report on behalf of the Fermi GBM Team:\n\n\"At 11:23:33.59 UT on 05 August 2023, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 230805B (trigger 712927418 / 230805475),\nwhich was also detected by Swift BAT (S. B. Cenko et al. 2023, GCN 34339).\nThe Fermi GBM on-ground location is consistent with the Swift BAT position.\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 48 degrees.\n\nThe GBM light curve consists of multiple emissions\nwith a duration (T90) of about 60 s (50-300 keV).\nThe time-averaged spectrum from T0-0 s to T0+60.5 s is best fit by\na simple power law function with index -1.4 +/- 0.03\n\nThe event fluence (10-1000 keV) in this time interval is\n(4.8 +/- 0.3)E-6 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+-0.1 s in the 10-1000 keV band\nis 2.3 +/- 0.2 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog:\nhttps://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html\n\nFor Fermi GBM data and info, please visit the official Fermi GBM Support Page:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxNDE5MjEwLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.Il2Zt4Yfnqvmdb_GdpyJiguTj_1xg4IaELx5iosQyB0\n\n",
"published": "2023-08-07T14:40:18.328539Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-07T14:40:18.328556Z",
"modified": "2023-08-07T14:40:18.336660Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1894,
"topic": "gcn.circular",
"uuid": "0d3cf57f-8823-4947-b58b-b94034325795",
"title": "Konus-Wind detection of GRB 230803A",
"submitter": "Hop gcn.circular",
"authors": "Dmitry Frederiks at Ioffe Institute <fred@mail.ioffe.ru>",
"data": {
"date": "23/08/07 15:47:20 GMT",
"from": "Dmitry Frederiks at Ioffe Institute <fred@mail.ioffe.ru>",
"title": "GCN CIRCULAR",
"number": "34358",
"subject": "Konus-Wind detection of GRB 230803A"
},
"message_text": "D. Frederiks, A.Lysenko, A. Ridnaia, D. Svinkin,\nA. Tsvetkova, M. Ulanov, and T. Cline,\non behalf of the Konus-Wind team, report:\n\nThe long GRB 230803A (Fermi GBM detection: Fermi GBM team, GCN 34325;\nAstroSat CZTI detection: Navaneeth et al., GCN 34328;\nIPN triangulation: Kozyrev et al., GCN 34330)\ntriggered Konus-Wind (KW) at T0=5229.064 s UT (01:27:09.064).\n\nThe burst light curve shows a multi-peaked structure\nwith a total duration of ~126 s.\nThe emission is seen up to ~2 MeV.\n\nThe Konus-Wind light curve of this GRB is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB230803_T05229/\n\nAs observed by Konus-Wind, the burst had\na fluence of (7.59 ± 0.88)x10^-5 erg/cm^2 and\na 64-ms peak energy flux, measured from T0 + 93.760 s,\nof (1.43 ± 0.13)x10^-5 erg/cm^2/s (both in the 20 keV - 10 MeV energy range).\n\nThe time-integrated spectrum (measured from T0+57.600 to T0+128.256 s)\nis best fit in the 20 keV - 15 MeV range\nby a GRB (Band) function with the following model parameters:\nthe low-energy photon index alpha = -1.30 (-0.06,+0.08),\nthe high energy photon index beta = -2.65 (-0.82,+0.30),\nthe peak energy Ep = 256 (-31,+32) keV,\nchi2 = 112/97 dof.\n\nThe spectrum near the peak count rate (measured from T0+90.368 to T0+95.488 s)\nis best fit in the 20 keV - 15 MeV range\nby a GRB (Band) function with the following model parameters:\nthe low-energy photon index alpha = -0.93 (-0.06,+0.07),\nthe high energy photon index beta = -2.32 (-0.20,+0.14),\nthe peak energy Ep = 284 (-38,+40) keV,\nchi2 = 66/77 dof.\n\nAll the quoted errors are estimated at the 90% confidence level.\nAll the presented results are preliminary.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxNDIzMjQ1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.m5rUb8AfJYe6Rt4gIJMgCBiGpvcC7gty1Cyok1Q7kVc\n\n",
"published": "2023-08-07T15:47:33.871991Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-07T15:47:33.872007Z",
"modified": "2023-08-07T15:47:33.880872Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1895,
"topic": "gcn.circular",
"uuid": "7377b304-1058-45fd-9fd2-6e2f9debf54b",
"title": "LIGO/Virgo/KAGRA S230805x: Upper limits from Swift/BAT-GUANO",
"submitter": "Hop gcn.circular",
"authors": "Samuele Ronchini at PSU <sjs8171@psu.edu>",
"data": {
"date": "23/08/07 15:58:47 GMT",
"from": "Samuele Ronchini at PSU <sjs8171@psu.edu>",
"title": "GCN CIRCULAR",
"number": "34359",
"subject": "LIGO/Virgo/KAGRA S230805x: Upper limits from Swift/BAT-GUANO"
},
"message_text": "Samuele Ronchini (PSU), Gayathri Raman (PSU), Aaron Tohuvavohu (U Toronto), James DeLaunay (U Alabama), Jamie A. Kennea (PSU), Tyler Parsotan (NASA GSFC) report:\n\nSwift/BAT was observing 83.45% of the GW localization probability (bayestar.multiorder.fits) at merger time. A fraction 31.75 % of the GW localization posterior is contained inside the BAT coded FoV.\n\nThe LVK notice, distributed in near real-time, triggered the Swift Mission Operations Center operated Gamma-ray Urgent Archiver for Novel Opportunities (GUANO; Tohuvavohu et al. 2020, ApJ, 900, 1).\n\nUpon trigger by this notice, GUANO sent a command to the Swift Burst Alert Telescope (BAT) to save 200 seconds of BAT event-mode data from [-50,+150] seconds around the time of the burst. All the requested event mode data was delivered to the ground.\n\nUsing the NITRATES analysis (DeLaunay + Tohuvavohu 2022, ApJ, 941, 169), we searched for emission on 8 timescales from 0.128s to 16.384s in the interval [-20,+20] seconds around the merger time. We find no evidence for a signal, and derive the following upper limits.\n\nWe quote the 5-sigma flux upper limits in the 15-350 keV band, weighted over the GW localization, for four spectral templates (soft, normal, and hard GRB-like templates described in [arXiv:1612.02395], and spectral shape from GRB170817A [arXiv:1710.05446]) and for four time bins.\nIn units of 10^-7 erg/s/cm^2:\n\ntime_bin (s) soft normal hard GRB170817\n-------------------------------\n0.256 12.0 7.8 6.8 8.8\n1.024 6.1 4.0 3.5 4.5\n4.096 3.3 2.1 1.9 2.4\n16.384 2.0 1.3 1.1 1.5\n\n\nThe upper limits as function of sky position are plotted here, alongside the GW localization:\nhttps://doi.org/10.5281/zenodo.8219098\nThe solid and dashed lines indicate the 90% and 50% GW contour levels, respectively.\n\nThe corresponding fits file can be found here:\nhttps://doi.org/10.5281/zenodo.8219106\n\nGUANO is a fully autonomous, extremely low latency, spacecraft\ncommanding pipeline designed for targeted recovery of BAT event mode\ndata around the times of compelling astrophysical events to enable\nmore sensitive GRB searches.\n\nA live reporting of Swift/BAT event data recovered by GUANO can be\nfound at: https://www.swift.psu.edu/guano/\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkxNDIzOTMzLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.kP9NRtdzTsIM_KUKuSj7EA73ssWwvU1-9ahjtE7ifWM\n\n",
"published": "2023-08-07T15:58:58.140361Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-07T15:58:58.140384Z",
"modified": "2023-08-07T15:58:58.147355Z",
"nonlocalizedevents": [
{
"event_id": "S230805x"
}
],
"targets": []
},
{
"id": 1896,
"topic": "igwn.gwalert",
"uuid": "824abf82-3415-4ab2-be5d-9d4a48015302",
"title": "S230807f - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230807f/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230807f/view/"
},
"event": {
"far": 7.141757350979996e-08,
"time": "2023-08-07T20:50:45.416Z",
"group": "CBC",
"search": "AllSky",
"area_50": 1932.683441510015,
"area_90": 6087.396808716594,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.04264138160689884,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "a50a800cb00b980d220e91b359ca696b",
"classification": {
"BBH": 0.9531444746139138,
"BNS": 7.709956723248038e-16,
"NSBH": 5.975891496337405e-14,
"Terrestrial": 0.046855525386025665
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-07T20:51:21Z",
"superevent_id": "S230807f",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-07T20:51:23.595849Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-07T20:51:23.595872Z",
"modified": "2023-08-07T20:51:23.604893Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1897,
"topic": "igwn.gwalert",
"uuid": "27dae775-147d-4f16-8f02-906bae527d41",
"title": "S230807f - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230807f/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230807f/view/"
},
"event": {
"far": 7.141757350979996e-08,
"time": "2023-08-07T20:50:45.416Z",
"group": "CBC",
"search": "AllSky",
"area_50": 1932.683441510015,
"area_90": 6087.396808716594,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.04264138160689884,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "a50a800cb00b980d220e91b359ca696b",
"classification": {
"BBH": 0.9531444746139138,
"BNS": 7.709956723248038e-16,
"NSBH": 5.975891496337405e-14,
"Terrestrial": 0.046855525386025665
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-07T20:56:06Z",
"superevent_id": "S230807f",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-07T20:56:07.181801Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-07T20:56:07.181832Z",
"modified": "2023-08-07T20:56:07.187976Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1898,
"topic": "igwn.gwalert",
"uuid": "44ea7624-3dde-41ca-9ca5-7e7dfc9bb595",
"title": "S230807f - INITIAL",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230807f/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230807f/view/"
},
"event": {
"far": 7.141757350979996e-08,
"time": "2023-08-07T20:50:45.416Z",
"group": "CBC",
"search": "AllSky",
"area_50": 1932.683441510015,
"area_90": 6087.396808716594,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.04264138160689884,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "a50a800cb00b980d220e91b359ca696b",
"classification": {
"BBH": 0.8637835798930218,
"BNS": 3.673354129049579e-09,
"NSBH": 2.7150471143635476e-08,
"Terrestrial": 0.13621638928315288
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "INITIAL",
"sequence_num": 3,
"time_created": "2023-08-07T21:15:33Z",
"superevent_id": "S230807f",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-07T21:15:34.707817Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-07T21:15:34.707841Z",
"modified": "2023-08-07T21:15:34.716252Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1899,
"topic": "igwn.gwalert",
"uuid": "8360e8ed-19e9-4845-aa1a-147d13a429e8",
"title": "S230807k - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230807k/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230807k/view/"
},
"event": {
"far": 1.308967875957023e-05,
"time": "2023-08-07T21:16:24.647Z",
"group": "CBC",
"search": "AllSky",
"area_50": 296.00837749541347,
"area_90": 1509.0499740896782,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.0,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
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