HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept
{
"count": 257459,
"next": "https://hermes.lco.global/api/v0/messages/?format=api&limit=100&offset=1400&ordering=retracted_on",
"previous": "https://hermes.lco.global/api/v0/messages/?format=api&limit=100&offset=1200&ordering=retracted_on",
"results": [
{
"id": 2185,
"topic": "igwn.gwalert",
"uuid": "f54fa1b3-10f8-462a-bf34-1e07b565d6ec",
"title": "S230818ad - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230818ad/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230818ad/view/"
},
"event": {
"far": 9.83257e-06,
"time": "2023-08-18T08:46:31.349Z",
"group": "Burst",
"search": "AllSky",
"area_50": 158.41667553360776,
"area_90": 701.6494873965356,
"duration": 0.002431,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "7a02a89d71fffadb32563abf9eda99bc",
"classification": {},
"skymap_version": 0,
"central_frequency": 253.986618
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-18T08:53:23Z",
"superevent_id": "S230818ad",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-18T08:53:24.782302Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-18T08:53:24.782321Z",
"modified": "2023-08-18T08:53:24.786822Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2186,
"topic": "igwn.gwalert",
"uuid": "40ab11cb-58dc-4a5a-8019-a38e270049c6",
"title": "S230818an - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230818an/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230818an/view/"
},
"event": {
"far": 1.81331e-05,
"time": "2023-08-18T11:08:01.957Z",
"group": "Burst",
"search": "BBH",
"area_50": 2040.3228515083467,
"area_90": 8540.652133668837,
"duration": 0.056834,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "ae135cf545d3ad6a4ce25624f12644dc",
"classification": {},
"skymap_version": 0,
"central_frequency": 28.16374
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-18T11:09:04Z",
"superevent_id": "S230818an",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-18T11:09:05.706925Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-18T11:09:05.706956Z",
"modified": "2023-08-18T11:09:05.712895Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2187,
"topic": "igwn.gwalert",
"uuid": "d846c6b3-94d7-4414-8af0-b3ef1cbd448f",
"title": "S230818an - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230818an/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230818an/view/"
},
"event": {
"far": 1.81331e-05,
"time": "2023-08-18T11:08:01.957Z",
"group": "Burst",
"search": "BBH",
"area_50": 2040.3228515083467,
"area_90": 8540.652133668837,
"duration": 0.056834,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "ae135cf545d3ad6a4ce25624f12644dc",
"classification": {},
"skymap_version": 0,
"central_frequency": 28.16374
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-18T11:13:38Z",
"superevent_id": "S230818an",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-18T11:13:39.296848Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-18T11:13:39.296878Z",
"modified": "2023-08-18T11:13:39.300757Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2188,
"topic": "gcn.circular",
"uuid": "fa7423f4-3cef-4fff-9b96-2f76339fca2a",
"title": "GRB 230816A: SVOM/C-GFT optical detection",
"submitter": "Hop gcn.circular",
"authors": "Chao Wu at NAOC <wuchao.lamost@gmail.com>",
"data": {
"date": "23/08/18 13:41:54 GMT",
"from": "Chao Wu at NAOC <wuchao.lamost@gmail.com>",
"title": "GCN CIRCULAR",
"number": "34473",
"subject": "GRB 230816A: SVOM/C-GFT optical detection"
},
"message_text": "Liping Xin (NAOC), Chao Wu (NAOC), Zhe Kang (CHO), Xuhui Han (NAOC), Huali\nLi (NAOC), Xiaomeng Lu (NAOC), Damien Turpin(CEA), Zhenwei Li\n(CHO)ï¼Pinpin Zhang (NAOC)ï¼Ruosong Zhang (NAOC)ï¼Yulei Qiu (NAOC)ï¼You Lv\n(CHO)ï¼Jing Wang(GXU), Cordier Bertrand (CEA) and Jianyan Wei (NAOC) on\nbehalf of SVOM GRB team\n\nWe observed the burst GRB230816A (Siegel et al. GCN Circ. 34450) on\n16:15:38 UT, Aug. 16th, 2023, about 6.9 minutes after the Swift trigger\nwith C-GFT (Chinese Ground Follow-up Telescope in SVOM mission) in System\nTest Mode (STM). C-GFT is located at Jilin (long.=126.33 deg,\nlat.=43.8243778 deg), Changchun Observatory, National Astronomical\nObservatories, CAS. It has FOV of 1.5 deg X 1.5 deg with a 4k*4k CMOS\ndetector mounted on the primary focus of 1.2-meter-aperure telescope.\n\nA series of g and r band images were obtained. The exposure time was 10\nseconds for each frame.\n\nThe optical afterglow reported (Jiang et al., GCN 34453, Moskvitin et al.,\nGCN 34456., Pankov et al.,GCN 34457, Odeh et al., GCN 34458Klose et al.,\nGCN 34459., Kumar et al., GCN 34460; Ruocco et al., GCN 34469) was also\nclearly detected by our stacked r-band image (100 * 10 seconds). The\nbrightness was estimated to be about 20.1 +/-0.2 magnitude in r-band with\nthe midtime of about 34 min after the burst, after calibration with nearby\n USNO R2 catalogs.\n\nMore detailed analysis is continuing.\n\nWe thank the observation assistant Bowen Li at Jilin observatory for their\nexcellent support.\n\nThis message may be cited.\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyMzY2MTE5LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.atLp4CIepLOEmfSxkpzi_6o7TIZxWHQ7ObYt4TKpGiM\n\n",
"published": "2023-08-18T13:42:05.069850Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-18T13:42:05.069870Z",
"modified": "2023-08-18T13:42:05.075026Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2189,
"topic": "igwn.gwalert",
"uuid": "c753a538-bf7b-4cae-b721-2ceec1466779",
"title": "S230818ay - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230818ay/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230818ay/view/"
},
"event": {
"far": 3.11688e-06,
"time": "2023-08-18T14:29:45.578Z",
"group": "Burst",
"search": "BBH",
"area_50": 337.3960453748892,
"area_90": 1190.1183889094345,
"duration": 0.006816,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "5f2f0b1373aadf9566c8704c8cd8ed0c",
"classification": {},
"skymap_version": 0,
"central_frequency": 133.079483
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-18T14:32:16Z",
"superevent_id": "S230818ay",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-18T14:32:17.264998Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-18T14:32:17.265049Z",
"modified": "2023-08-18T14:32:17.270750Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2190,
"topic": "igwn.gwalert",
"uuid": "83abded2-6440-4826-b413-b4c0b51c4049",
"title": "S230818ay - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230818ay/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230818ay/view/"
},
"event": {
"far": 3.11688e-06,
"time": "2023-08-18T14:29:45.578Z",
"group": "Burst",
"search": "BBH",
"area_50": 337.3960453748892,
"area_90": 1190.1183889094345,
"duration": 0.006816,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "5f2f0b1373aadf9566c8704c8cd8ed0c",
"classification": {},
"skymap_version": 0,
"central_frequency": 133.079483
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-18T14:36:49Z",
"superevent_id": "S230818ay",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-18T14:36:49.993436Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-18T14:36:49.993455Z",
"modified": "2023-08-18T14:36:49.997126Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2584,
"topic": "igwn.gwalert",
"uuid": "196e7dfa-2a36-4a4d-9c72-9662692efb53",
"title": "S230830c - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230830c/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230830c/view/"
},
"event": {
"far": 2.235402644146234e-05,
"time": "2023-08-30T04:22:06.104Z",
"group": "CBC",
"search": "AllSky",
"area_50": 269.25589255430754,
"area_90": 1646.6941319043094,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.07039066810287006,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "d4baa1f951eab2677567d23751805f43",
"classification": {
"BBH": 0.0,
"BNS": 0.031214723519200474,
"NSBH": 0.008504350263502412,
"Terrestrial": 0.9602809262172971
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-30T04:22:43Z",
"superevent_id": "S230830c",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-30T04:22:43.904677Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-30T04:22:43.904696Z",
"modified": "2023-08-30T04:22:43.908104Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2235,
"topic": "gcn.circular",
"uuid": "25986cff-6afd-49d0-854a-d429042a6567",
"title": "GRB 230818A: Leavitt Observatory upper limit",
"submitter": "Hop gcn.circular",
"authors": "leavittob@gmail.com",
"data": {
"date": "23/08/19 15:48:22 GMT",
"from": "leavittob@gmail.com",
"title": "GCN CIRCULAR",
"number": "34490",
"subject": "GRB 230818A: Leavitt Observatory upper limit"
},
"message_text": "E. Pavoni and L. Moretti (Leavitt Observatory), in a large collaboration with:\nM.G. Dainotti (National Astronomical Observatory of Japan),\nY. Niino (Tokyo University, Institute of Astronomy),\nK. Kalinowski (Aarhus University, Department of Physics and Astronomy),\nB. De Simone (Universita' degli Studi Di Salerno)\nreport:\n\nWe observed the field of GRB 230818A (Fermi: GBM team, GCN 34478; Swift: Tohuvavohu et al., GCN 34479; Gompertz et al., GCN 34480; Moskvitin et al., GCN 34483; Malesani et al., GCN 34485; Siegel et al., GCN 34486; Pankov et al., GCN 34487; Quadri et al., GCN 34488) with the telescope of Leavitt Observatory, Italy. Member of:\n\nUAI/SSV - Unione Astrofili Italiani/sezione stelle variabili, GRB section.\nATA - Associazione Tuscolana di Astronomia.\n\nThe observations began at 00:57 UT on 2023/08/18, 90 min after the GRB trigger, with our RC telescope D%0 mm F/D=8.\n\nWeather conditions were good.\n\nWe took 32 images of 120 sec each. All images are V filtered, calibrated with master dark and master flat, stacked with ASTAP software.\n\nWe have not detected any clearly visible sources, up to 19.60 magnitude with clear sky at\nRA (J2000): 19h 03m 33.08s\nDec (J2000): +40d 53' 48.0\"\n\non a field of view 31.1 x 26.8 arcmin.\n\nStart\t\tEnd\t\tVlim\n90 min\t\t154 min\t19.60\n\nThe magnitude limit was estimated with nearby stars from the Gaia EDR3 Catalog and is not corrected for galactic dust extinction.\n\nThe message may be cited.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyNDYwMTA3LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.KWH1Bvx63j7Zp_kFIxeTtOnN2JugWKGhbdEZDwqfLRg\n\n",
"published": "2023-08-19T15:48:32.554992Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-19T15:48:32.555009Z",
"modified": "2023-08-19T15:48:32.562220Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2236,
"topic": "gcn.circular",
"uuid": "03ce4766-2a66-430e-a8f2-da31f62815ec",
"title": "GRB 230818A: Tautenburg observations",
"submitter": "Hop gcn.circular",
"authors": "Sylvio Klose at TLS Tautenburg <klose@tls-tautenburg.de>",
"data": {
"date": "23/08/19 16:59:54 GMT",
"from": "Sylvio Klose at TLS Tautenburg <klose@tls-tautenburg.de>",
"title": "GCN CIRCULAR",
"number": "34491",
"subject": "GRB 230818A: Tautenburg observations"
},
"message_text": "S. Klose, S. Melnikov, B. Stecklum, A. Nicuesa Guelbenzu, F. Ludwig (all TLS Tautenburg) report:\n\nWe observed the field of GRB 230818A (Fermi GBM team, GCN 34478; Tohuvavohu et al., GCN 34479) with the Tautenburg 1.34m Schmidt telescope equipped with the TAUKAM 6kx6k CCD camera and using the Sloan filter set.\n\nFor the optical transient discovered by Lipunov et al. (GCN 34476) we measure the following magnitudes:\n\ng = 19.98 +/- 0.02 (midtime: August 19, 2023, 00:03:14 UT),\nr = 19.76 +/- 0.02 (midtime: August 19, 2023, 00:14:43 UT),\ni = 19.79 +/- 0.03 (midtime: August 19, 2023, 00:26:00 UT),\n\nand\n\ng = 21.35 +/- 0.12 (midtime: August 19, 2023, 01:57:48 UT),\nr = 20.97 +/- 0.10 (midtime: August 19, 2023, 02:08:35 UT),\ni = 20.86 +/- 0.10 (midtime: August 19, 2023, 02:19:32 UT),\n\ncalibrated against the Pan-STARRS catalog.\n\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyNDY0Mzk5LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.GIF1uMLuj0KbfzmKoRhP0K-29Weyc8uKCRXa74V9CyU\n\n",
"published": "2023-08-19T17:00:07.327198Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-19T17:00:07.327217Z",
"modified": "2023-08-19T17:00:07.332913Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2247,
"topic": "igwn.gwalert",
"uuid": "048c6b4c-0779-4b48-9340-ee8154b82d21",
"title": "S230819ax - UPDATE",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230819ax/files/bayestar.multiorder.fits,2",
"gracedb": "https://gracedb.ligo.org/superevents/S230819ax/view/"
},
"event": {
"far": 8.842249687858943e-09,
"time": "2023-08-19T17:19:10.455Z",
"group": "CBC",
"search": "AllSky",
"area_50": 848.7356987197926,
"area_90": 4042.877488982191,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.0,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "8cf9301d9da39c3f13367ea7768b9b17",
"classification": {
"BBH": 0.22510253270292888,
"BNS": 3.1665889186664814e-21,
"NSBH": 2.1734480489520617e-19,
"Terrestrial": 0.7748974672970711
},
"skymap_version": 2,
"central_frequency": null
},
"alert_type": "UPDATE",
"sequence_num": 4,
"time_created": "2023-08-19T23:29:50Z",
"superevent_id": "S230819ax",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-19T23:29:51.433831Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-19T23:29:51.433853Z",
"modified": "2023-08-19T23:29:51.439185Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2248,
"topic": "gcn.circular",
"uuid": "6d673fe0-cc2f-4996-be7e-59e901e362ce",
"title": "LIGO/Virgo/KAGRA S230819ax: Updated Sky localization",
"submitter": "Hop gcn.circular",
"authors": "Anjali Yelikar at Rochester Institute of Technology <ay2016@g.rit.edu>",
"data": {
"date": "23/08/19 23:49:10 GMT",
"from": "Anjali Yelikar at Rochester Institute of Technology <ay2016@g.rit.edu>",
"title": "GCN CIRCULAR",
"number": "34499",
"subject": "LIGO/Virgo/KAGRA S230819ax: 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 S230819ax (GCN Circular 34494). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.multiorder.fits, distributed via GCN Notice, is available for retrieval from the GraceDB event page:\n\nhttps://gracedb.ligo.org/superevents/S230819ax\n\nFor the Bilby.multiorder.fits sky map, the 90% credible region is 4044 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 4216 +/- 1645 Mpc (a posteriori mean +/- standard deviation).\n\nFor further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide https://emfollow.docs.ligo.org/userguide/.\n\n\n [1] Ashton et al. ApJS 241, 27 (2019)\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyNDg4OTU2LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.3Ni_YXT-GUlZYW-SpQYtfYDv13EXV4xWlBwOKZoCnA8\n\n",
"published": "2023-08-19T23:49:23.123958Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-19T23:49:23.123975Z",
"modified": "2023-08-19T23:49:23.129571Z",
"nonlocalizedevents": [
{
"event_id": "S230819a"
}
],
"targets": []
},
{
"id": 4245,
"topic": "igwn.gwalert",
"uuid": "02e0f19e-96b1-417b-9485-2acb31e8de9e",
"title": "S231028aw - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S231028aw/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S231028aw/view/"
},
"event": {
"far": 9.718437468109187e-06,
"time": "2023-10-28T14:00:36.384Z",
"group": "CBC",
"search": "AllSky",
"area_50": 1011.558665890759,
"area_90": 6066.4144675863145,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.0,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "1c2f536cda4b236e5d27c0134b4b46d2",
"classification": {
"BBH": 0.0,
"BNS": 0.30098993519528483,
"NSBH": 0.0,
"Terrestrial": 0.6990100648047152
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-10-28T14:01:03Z",
"superevent_id": "S231028aw",
"external_coinc": null
},
"message_text": "",
"published": "2023-10-31T23:27:55.222912Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-10-31T23:27:55.222942Z",
"modified": "2023-10-31T23:27:55.228662Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9190,
"topic": "lvk-users.beccatest",
"uuid": "93fd1c02-0e03-45b2-9f24-2c1e6a4b10e6",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"V1"
],
"time": [
1400510300
],
"range": 48.667431952057306
},
"message_text": "",
"published": "2024-05-23T14:38:28.276101Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T14:38:28.276130Z",
"modified": "2024-05-23T14:38:28.276143Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9191,
"topic": "lvk-users.beccatest",
"uuid": "ab8647b9-5b6d-4a1c-ba49-cda3bf6fc24e",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"H1"
],
"time": [
1400510400
],
"range": 149.6295553342426
},
"message_text": "",
"published": "2024-05-23T14:39:58.619760Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T14:39:58.619780Z",
"modified": "2024-05-23T14:39:58.619788Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2241,
"topic": "gcn.circular",
"uuid": "30dd559a-c210-43d3-887e-d1bdc44c9606",
"title": "GRB 230818A: AKO Upper Limit",
"submitter": "Hop gcn.circular",
"authors": "Mohammad Odeh at Al Khatim Observatory M44 <mshodeh@gmail.com>",
"data": {
"date": "23/08/19 17:53:39 GMT",
"from": "Mohammad Odeh at Al Khatim Observatory M44 <mshodeh@gmail.com>",
"title": "GCN CIRCULAR",
"number": "34493",
"subject": "GRB 230818A: AKO Upper Limit"
},
"message_text": "Mohammad Odeh, Osama Ghannam, Anas Mohammad, and Khalfan Al-Noaimy, report\non behalf of Al-Khatim Observatory (AKO) operated by the International\nAstronomical Center in Abu Dhabi, UAE:\n\nWe observed the field of GRB 230818A (Lipunov et al., GCN 34476; Fermi: GBM\nteam, GCN 34478; Swift: Tohuvavohu et al., GCN 34479; Gompertz et al., GCN\n 34480; Moskvitin et al., GCN 34483; Malesani et al., GCN 34485; Siegel et\nal., GCN 34486; Pankov et al., GCN 34487; Quadri et al., GCN 34488; Pavoni\net al., GCN 34490; Klose et al., GCN 34491) with our 0.36m f/7.7 robotic\ntelescope.\n\nWe obtained 13 x 180 sec. images in the clear filter on 19 August, from\n16:05 to 17:23 UT, (t_mid - t0 = 17.3 hours) with an upper limit of\nmagnitude = 22.0 for the stacked frames.\n\nWe also obtained 15 x 180 sec. images in the Ic filter from 16:02 to 17:32\nUT, (t_mid - t0 = 17.35 hours) with an upper limit of magnitude = 20.2 for\nthe stacked frames.\n\nNo reliable optical afterglow object was detected.\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyNDY3NjI0LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.a0jDO1Zz3aOobIpqSMM7OymoMVeL0YqQYwKN0nS3Qs4\n\n",
"published": "2023-08-19T17:53:49.864244Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-19T17:53:49.864261Z",
"modified": "2023-08-19T17:53:49.867925Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2242,
"topic": "gcn.circular",
"uuid": "a1ac3379-f1fb-473f-847e-bdaa03c46f04",
"title": "LIGO/Virgo/KAGRA S230819ax: Identification of a GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "sushant.sharma-chaudhary@ligo.org",
"data": {
"date": "23/08/19 17:55:28 GMT",
"from": "sushant.sharma-chaudhary@ligo.org",
"title": "GCN CIRCULAR",
"number": "34494",
"subject": "LIGO/Virgo/KAGRA S230819ax: 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 S230819ax during\nreal-time processing of data from LIGO Hanford Observatory (H1) and\nLIGO Livingston Observatory (L1) at 2023-08-19 17:19:10.455 UTC (GPS\ntime: 1376500768.455). The candidate was found by the CWB [1], GstLAL\n[2], MBTA [3], oLIB [4], and SPIIR [5] analysis pipelines.\n\nS230819ax is an event of interest because its false alarm rate, as\nestimated by the online analysis, is 8.8e-09 Hz, or about one in 3\nyears. The event's properties can be found at this URL:\n\nhttps://gracedb.ligo.org/superevents/S230819ax\n\nThe classification of the GW signal, in order of descending\nprobability, is BBH (>99%), Terrestrial (<1%), NSBH (<1%), or BNS\n(<1%).\n\nThere were noise transients at the LIGO Hanford and evidence for\nnonstationary noise at both LIGO detectors which may affect the\nparameters or the significance of the candidate.\n\nAssuming the candidate is astrophysical in origin, the probability\nthat the lighter compact object is consistent with a neutron star mass\n(HasNS) is <1%. [6] Using the masses and spins inferred from the\nsignal, the probability of matter outside the final compact object\n(HasRemnant) is <1%. [6] Both HasNS and HasRemnant consider the\nsupport of several neutron star equations of state. The probability\nthat either of the binary components lies between 3 and 5 solar masses\n(HasMassgap) is <1%.\n\nTwo sky maps are available at this time and can be retrieved from the\nGraceDB event page:\n * bayestar.multiorder.fits,1, an initial localization generated by\nBAYESTAR [7], distributed via GCN notice about 25 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\n4126 deg2. Marginalized over the whole sky, the a posteriori\nluminosity distance estimate is 4872 +/- 1527 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] Lynch et al. PRD 95, 104046 (2017)\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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyNDY3NzMxLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.iPTcT1lICisXnVz-sx8N8amZnP6XhVXWomvOYP4CBGM\n\n",
"published": "2023-08-19T17:55:36.055289Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-19T17:55:36.055305Z",
"modified": "2023-08-19T17:55:36.058758Z",
"nonlocalizedevents": [
{
"event_id": "S230819a"
}
],
"targets": []
},
{
"id": 2243,
"topic": "gcn.circular",
"uuid": "ee09b33a-dc15-4aa6-9845-026984940fe3",
"title": "GRB 230818A: further SAO RAS Zeiss-1000 observations",
"submitter": "Hop gcn.circular",
"authors": "Moskvitin Alexander at SAO RAS <mosk@sao.ru>",
"data": {
"date": "23/08/19 19:35:54 GMT",
"from": "Moskvitin Alexander at SAO RAS <mosk@sao.ru>",
"title": "GCN CIRCULAR",
"number": "34495",
"subject": "GRB 230818A: further SAO RAS Zeiss-1000 observations"
},
"message_text": "A. S. Moskvitin (SAO RAS), V. P. Goranskij (SAI MSU),\nreport on behalf of the GRB follow-up team.\n\nWe observed the field of GRB 230818A (Fermi GBM team, GCN 34478;\nTohuvavohu et al., GCN 34479) with the 1-m telescope of SAO RAS\nZeiss-1000 equipped with the CCD photometer. We obtained\n4 x 300 sec. images in Rc band on August 19, 17:42:30--18:07:26 UT.\n\nThe OT (Lipunov et al., GCNs 34476, 34477, 34481, 34482;\nGompertz et al., GCN 34480; Moskvitin et al., GCN 34483;\nMalesani et al., GCN 34485; Siegel and Tohuvavohu, GCN 34486;\nPankov et al., GCN 34487; Quadri and Strabla, GCN 34488;\nKlose et al., GCN 34491) is marginally detected with\nthe brightness of R = 23.0 +/- 0.3 (t_mid - t0 = 0.76903 days).\n\nThis preliminary photometry is based on nearby USNO-B1 stars (R2 mag).\nThe magnitude of the OT is not corrected for MW extinction.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyNDczNzU5LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.koIM5dXZ-hrXyVo3lrAtUwTD9Vt14vvRU1Yj8eAo5fI\n\n",
"published": "2023-08-19T19:36:05.626619Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-19T19:36:05.626640Z",
"modified": "2023-08-19T19:36:05.632552Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2244,
"topic": "gcn.circular",
"uuid": "86b70a92-7140-424f-bb62-44cfe42835f1",
"title": "GRB 230812B: SAO RAS Zeiss-1000 observations",
"submitter": "Hop gcn.circular",
"authors": "Moskvitin Alexander at SAO RAS <mosk@sao.ru>",
"data": {
"date": "23/08/19 20:09:24 GMT",
"from": "Moskvitin Alexander at SAO RAS <mosk@sao.ru>",
"title": "GCN CIRCULAR",
"number": "34496",
"subject": "GRB 230812B: SAO RAS Zeiss-1000 observations"
},
"message_text": "A. S. Moskvitin (SAO RAS), V. P. Goranskij (SAI MSU),\nreport on behalf of the GRB follow-up team.\n\nWe observed the field of GRB 230812B (Fermi GBM Team, GCN 34386;\nScotton et al., GCN 34392; Page et al. GCN 34394; Kuin et al.,\nGCN 34399; Casentini et al., GCN 34402) with the 1-m telescope\nof SAO RAS Zeiss-1000 equipped with the CCD photometer. We obtained\n6 x 300 sec. images in Rc band on August 19, 18:11:41--18:45:30 UT.\n\nThe OT (Lesage et al., GCN 34387; Scotton et al., GCN 34392; Page,\nGCN 34394; Zheng & Filippenko, GCN 34395; Lipunov et al., GCN 34396;\nSalgundi et al., GCN 34397; Ackley et al., GCN 34398; Xiong et al.,\nGCN 34401; Casentini et al., GCN 34402; Frederiks et al., GCN 34403;\nMao et al., GCN 34404; Odeh et al., GCN 34405; Moskvitin & Spiridonova,\nGCN 34406; Leonini et al., GCN 34408; de Ugarte Postigo et al.,\nGCNs 24409, 34410; Belkin et al. GCN 34412; Ruocco et al. GCN 34413;\nFrederiks et al. GCN 34414; Ruocco et al. GCN 34415; Shrestha et al.\nGCN 34416; Quadri et al. GCN 34417; Adami et al. GCN 34418;\nMoretti et al. GCN 34419; Kumar et al. GCN 34420; Belkin et al. GCNs\n34421, GCN 34423; Pyshna et al., GCN 34425; Moskvitin & Spiridonova,\nGCN 34428; Quadri & Strabla, GCN 34430; Mihov et al., GCN 34431;\nBelkin et al. GCN 34432; Klose et al., GCN 34435; Scarfi, GCN 34436;\nMoskvitin & Spiridonova, GCNs 34442, 34461, 34471, 34475;\nVinko et al., GCN 34463) is clearly detected in our stacked frame\nwith the brightness of R = 21.8 +/- 0.1 (t_mid - t0 = 6.9794 days).\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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyNDc1NzY5LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.x5QV4ZKVznOra-mE7IQJls336fJiB0VUTQWj5h2KveQ\n\n",
"published": "2023-08-19T20:09:35.174578Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-19T20:09:35.174596Z",
"modified": "2023-08-19T20:09:35.178574Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2270,
"topic": "gcn.circular",
"uuid": "9144c70f-4ba9-4a98-9aed-7cebf06f1a20",
"title": "Swift GRB230820.82: 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": "23/08/20 19:50:53 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "34503",
"subject": "Swift GRB230820.82: 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-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the Swift GRB230820.82 (trigger No 1186295,16h 21m 03.14s , -17d 25m 05.2s, R=0.05) errorbox 60 sec after trigger time at 2023-08-20 19:37:48 UT, with upper limit up to 16.2 mag. The observations began at zenith distance = 81 deg. The sun altitude is -30.3 deg.\n\nThe galactic latitude b = 22 deg., longitude l = 358 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"57049\n\nWe obtain a following upper limits.\n\nTmid-T0 | Site |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____|_______|______|________\n\n 151 | MASTER-Kislovodsk | C | 180 | 16.2 |\n 151 | MASTER-Kislovodsk | C | 180 | 16.0 |\n 441 | MASTER-Kislovodsk | P- | 80 | 14.8 |\n 441 | MASTER-Kislovodsk | P| | 80 | 14.6 |\n 539 | MASTER-Kislovodsk | P- | 100 | 15.5 |\n 539 | MASTER-Kislovodsk | P| | 100 | 15.7 |\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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyNTYxMDU4LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.py0YbIrnwEfgaBHSJYHWF3AnfyjClTphJltNB1RriF8\n\n",
"published": "2023-08-20T19:51:03.805747Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-20T19:51:03.805820Z",
"modified": "2023-08-20T19:51:03.811822Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2593,
"topic": "igwn.gwalert",
"uuid": "48ea864c-07f5-46ae-8421-458f71f80574",
"title": "S230830k - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230830k/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230830k/view/"
},
"event": {
"far": 2.30786e-05,
"time": "2023-08-30T05:19:11.458Z",
"group": "Burst",
"search": "AllSky",
"area_50": 689.6895529522766,
"area_90": 4756.906557645591,
"duration": 0.077067,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "728c0d2c425cd44d94f839d46f7249a9",
"classification": {},
"skymap_version": 0,
"central_frequency": 1659.535278
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-30T05:25:35Z",
"superevent_id": "S230830k",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-30T05:25:36.850935Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-30T05:25:36.850967Z",
"modified": "2023-08-30T05:25:36.854968Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2594,
"topic": "igwn.gwalert",
"uuid": "4f2ba69e-d726-42fd-9fb6-e86c61f66d7b",
"title": "S230830b - RETRACTION",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"gracedb": "https://gracedb.ligo.org/superevents/S230830b/view/"
},
"event": null,
"alert_type": "RETRACTION",
"sequence_num": 3,
"time_created": "2023-08-30T05:27:34Z",
"superevent_id": "S230830b",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-30T05:27:35.655805Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-30T05:27:35.655860Z",
"modified": "2023-08-30T05:27:35.659757Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9195,
"topic": "lvk-users.beccatest",
"uuid": "c3bf6fe6-efb2-43a5-ba6d-8bd7b08aa06e",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"L1"
],
"time": [
1400510500
],
"range": 167.8108264244983
},
"message_text": "",
"published": "2024-05-23T14:41:39.835253Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T14:41:39.835283Z",
"modified": "2024-05-23T14:41:39.835297Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9196,
"topic": "lvk-users.beccatest",
"uuid": "8cda48b6-e56a-47cb-afba-711613978fd6",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"V1"
],
"time": [
1400510500
],
"range": 48.36450182533703
},
"message_text": "",
"published": "2024-05-23T14:41:46.859019Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T14:41:46.859039Z",
"modified": "2024-05-23T14:41:46.859047Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2245,
"topic": "gcn.circular",
"uuid": "af466ef3-4048-4c3a-b80a-76721bf3044d",
"title": "GRB 230818A: SAO RAS 6-m telescope spectroscopy",
"submitter": "Hop gcn.circular",
"authors": "Moskvitin Alexander at SAO RAS <mosk@sao.ru>",
"data": {
"date": "23/08/19 20:52:59 GMT",
"from": "Moskvitin Alexander at SAO RAS <mosk@sao.ru>",
"title": "GCN CIRCULAR",
"number": "34497",
"subject": "GRB 230818A: SAO RAS 6-m telescope spectroscopy"
},
"message_text": "A. S. Moskvitin, D. V. Oparin (SAO RAS), A. S. Pozanenko (IKI),\nreport on behalf of the larger GRB follow-up collaboration.\n\nWe observed the GRB 230818A OT (Lipunov et al., GCNs 34476, 34477,\n34481, 34482; Gompertz et al., GCN 34480; Moskvitin et al., GCN 34483,\n34495; Malesani et al., GCN 34485; Siegel and Tohuvavohu, GCN 34486;\nPankov et al., GCN 34487; Quadri and Strabla, GCN 34488;\nKlose et al., GCN 34491) with the BTA 6-meter telescope of SAO RAS\nequipped with Scorpio-II. The observations were started since ~ 0.5 h\nafter the burst (Fermi: GBM team, GCN 34478; Swift: Tohuvavohu et al.,\nGCN 34479; AstroSat: Pari et al., GCN 34492).\n\nIn the 4 x 600 sec spectrum of (4200--8530 AA, FWHM resolution ~ 7A)\nwe identified the absorption lines (C IV, Si II) at a common redshift\nof z = 2.42. We also identified Si IV and Al II lines at a common\nredshift of 2.38 which might be an intervening system. Thus we confirm\nthe redshift measurement obtained by Malezani et al. (GCN 34485).\n\nUsing acquisition observation we obtained preliminary photometry\nof the afterglow as following (calibrated against Pan-STARRS nearby\nstars)\n\nDate UT-start Exptime Filter t-T0 OT Err\n sec days\n2023-08-19 00:00:28 2 x 20 r' 0.02339 19.50 +/- 0.02\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyNDc4Mzg0LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.UYgGA2BhF_VqXBY1Y9S3x2DPrgqvjjv8v9Wrp_59OJ0\n\n",
"published": "2023-08-19T20:53:09.771372Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-19T20:53:09.771389Z",
"modified": "2023-08-19T20:53:09.778569Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2246,
"topic": "gcn.circular",
"uuid": "aba79ae2-05ea-4fad-93b9-dc2eed510d0a",
"title": "GRB 230818A: Nickel and KAIT telescope optical observations",
"submitter": "Hop gcn.circular",
"authors": "Weikang Zheng at UC Berkeley <weikang@berkeley.edu>",
"data": {
"date": "23/08/19 22:13:43 GMT",
"from": "Weikang Zheng at UC Berkeley <weikang@berkeley.edu>",
"title": "GCN CIRCULAR",
"number": "34498",
"subject": "GRB 230818A: Nickel and KAIT telescope optical observations"
},
"message_text": "Neil Pichay, Elma Chuang, WeiKang Zheng and Alex Filippenko (UC Berkeley)\n\nreport on behalf of the KAIT GRB team:\n\n\nWe observed the field of GRB 230818A (Fermi GBM team, GCN 34478;\n\nTohuvavohu et al., GCN 34479) with the 1-m Nickel and 0.76-m KAIT\n\ntelescopes located at Lick observatory, California. Observations\n\nstarted about 0.21 days after the burst. A total of 6 images (600s\n\nexposure each) in R band were taken with Nickel telescopes, while\n\nKAIT images were taken in clear band, with 60s exposure and coadded.\n\nWe detected the optical afterglow (Lipunov et al., GCNs 34476, 34477,\n\n34481, 34482; Gompertz et al., GCN 34480; Moskvitin et al., GCN 34483;\n\nMalesani et al., GCN 34485; Siegel and Tohuvavohu, GCN 34486; Pankov\n\net al., GCN 34487; Quadri and Strabla, GCN 34488; Klose et al., GCN\n\n34491; Moskvitin et al., GCN 34495; 34497) and measure the following\n\nmagnitude calibrated to the Pan-STARRS1 catalog:\n\n\n\nt-t0(days) filter mag err\n\n0.218 clear 21.8 0.3\n\n0.226 R 21.6 0.2\n\n0.324 clear 21.3 0.3\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyNDgzMjI4LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.urvaob3G37iDg9ZiK9TC4WiAeltTEwAQtFQFJQVs2oM\n\n",
"published": "2023-08-19T22:13:53.463937Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-19T22:13:53.463953Z",
"modified": "2023-08-19T22:13:53.470963Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2293,
"topic": "igwn.gwalert",
"uuid": "379af0c7-7425-4e26-b89b-385bf48b2c4d",
"title": "S230821aw - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230821aw/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230821aw/view/"
},
"event": {
"far": 1.47384e-05,
"time": "2023-08-21T11:25:06.814Z",
"group": "Burst",
"search": "AllSky",
"area_50": 1715.5162108116251,
"area_90": 6326.595497601777,
"duration": 0.01086,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "778b38789044f5d515a3ab7747d212fb",
"classification": {},
"skymap_version": 0,
"central_frequency": 633.908691
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-21T11:31:07Z",
"superevent_id": "S230821aw",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-21T11:31:08.405424Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-21T11:31:08.405443Z",
"modified": "2023-08-21T11:31:08.409095Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2294,
"topic": "gcn.circular",
"uuid": "ccfb4ebd-35f2-46b3-9117-b88627c17b17",
"title": "GRB 230812B : GRANDMA/Kilonova-Catcher optical afterglow detection and upper limits",
"submitter": "Hop gcn.circular",
"authors": "Damien Turpin at CEA-Saclay <dturpin-astro@hotmail.com>",
"data": {
"date": "23/08/21 13:15:22 GMT",
"from": "Damien Turpin at CEA-Saclay <dturpin-astro@hotmail.com>",
"title": "GCN CIRCULAR",
"number": "34508",
"subject": "GRB 230812B : GRANDMA/Kilonova-Catcher optical afterglow detection and upper limits"
},
"message_text": "D. Turpin (CEA), M. Serrau (KNC), S. Leonini (KNC), M. Freeberg (KNC),\nF. D. Romanov (KNC), S. Karpov (FZU), S. Antier (OCA/Artemis) report\non behalf of the GRANDMA/Kilonova-Catcher collaboration:\n\nThe Kilonova-Catcher telescope network responded to the alert of\nGRB 230812B (Fermi GBM detection: Roberts et al., GCN 34391;\nFermi LAT detection: Scotton et al., GCN 34392).\n\nThe KNC observations were taken by M. Serrau at the Chante-Perdrix\nObservatory (France), S. Leonini at the Montarrenti Observatory (Italy),\nM. Freeberg at the Hidden Valley Observatory (USA) and F.~D. Romanov at the\niTelescope.Net in Sierra Remote Observatory (USA).\nThe afterglow is first detected in 50x30s R-band coadded images at\nabout 1 day (midtime of the exposure) after the Fermi/GBM trigger time.\n\nBelow, we report a subset of our photometric measurements.\n---------------------------------------------------------------------------------\nT-T0 (midtime,day) |Exposure| Filter | Mag +/- err |Mag.Lim. (5sig AB) |Observer\n---------------------------------------------------------------------------------\n1.024 | 50 x 30s | Rc | 20.35 +/- 0.16 | -- | Leonini\n1.164 | 15 x 180s | V | 20.74 +/- 0.08 | -- | Serrau\n1.182 | 30 x 180s | Rc | 20.87 +/- 0.15 | -- | Serrau\n1.425 | 6 x 300s | Ic | -- | 18.6 | Romanov\n2.334 | 12 x 300s | r | -- | 20.6 | Freeberg\n2.397 | 12 x 300s | i | -- | 19.3 | Freeberg\n2.624 | 30 x 180s | Rc | 21.29 +/- 0.11 | -- | Serrau\n4.080 | 40 x 180s | V | 22.20 +/- 0.21 | -- | Serrau\n\nOur detections are consistent with the fading behavior previously reported\nby GRANDMA Mao et al., GCN 34404; Pyshna et al., GCN 34425. We note that\nthe underlying host galaxy may contribute to our late photometric\nmeasurements. The reported magnitudes are not corrected for the galactic\ndust extinction in the line of sight of the burst.\n\nThe GRANDMA/Kilonova-Cacther images have been calibrated using field\nstars from the PanSTARRS-DR1 catalog using the STDpipe pipeline\n(Karpov 2022) and the ps1/r to Rc mag conversion from (Pancino et al. 2022).\n\nGRANDMA is a worldwide telescope network (grandma.ijclab.in2p3.fr)\ndevoted to the observation of transients in the context of multi-messenger\nastrophysics (Antier et al. 2020 MNRAS 497, 5518). Kilonova-Catcher (KNC) is\nthe citizen science program of GRANDMA (http://kilonovacatcher.in2p3.fr/).\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyNjIzNzI4LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.YSbL7F_7Rm2GNUVqzAlgp9WeWnFSY_CLcE3cC0aKSh4\n\n",
"published": "2023-08-21T13:15:33.552295Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-21T13:15:33.552311Z",
"modified": "2023-08-21T13:15:33.558486Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2295,
"topic": "gcn.circular",
"uuid": "1fdcea55-2fa6-44c0-9268-172501558983",
"title": "Swift triggers 1186294-1186304 are not astrophysical transients",
"submitter": "Hop gcn.circular",
"authors": "P.A. Evans at U. Leicester <pae9@leicester.ac.uk>",
"data": {
"date": "23/08/21 14:33:38 GMT",
"from": "P.A. Evans at U. Leicester <pae9@leicester.ac.uk>",
"title": "GCN CIRCULAR",
"number": "34509",
"subject": "Swift triggers 1186294-1186304 are not astrophysical transients"
},
"message_text": "P.A. Evans (U. Leicester) reports on behalf of the Swift team.\n\nFurther to GCN Circ. 34502, the subsequent BAT triggers: 1186294, 1186295, 1186296, 1186302 and 1186304 were not caused by astrophysical transients but arose due to the star tracker loss of lock. These events should be disregarded.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyNjI4NDIzLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.aG3ZZpqfFBx0gkDV5cDafEyOmAyLzBXTB1WGRf4CTQ0\n\n",
"published": "2023-08-21T14:33:48.941049Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-21T14:33:48.941067Z",
"modified": "2023-08-21T14:33:48.947098Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6295,
"topic": "gcn.circular",
"uuid": "1662a2fb-163a-451c-b807-bf005c74eed5",
"title": "X-ray transient EP240315a: continued ATCA monitoring",
"submitter": "Hop gcn.circular",
"authors": "Roberto Ricci at INAF-IRA <ricci@ira.inaf.it>",
"data": {
"date": "24/03/29 11:07:44 GMT",
"from": "Roberto Ricci at INAF-IRA <ricci@ira.inaf.it>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/35990"
},
"title": "GCN CIRCULAR",
"number": "35990",
"subject": "X-ray transient EP240315a: continued ATCA monitoring"
},
"message_text": "R. Ricci (INAF-IRA), D. Dobie (Swinburne/OzGrav), J. K. Leung (U. Toronto/HUJI), E. Troja (U. Rome)\n\n\nWe report on the results of a follow-up observation of the field of AT2024eju (Srivastav et al., GCN35932), the likely optical counterpart to the fast X-ray transient EP240315a (Zhang et al., GCN35931), with the Australia Telescope Compact Array (ATCA) under project code CX564. The observations were taken from 2024-03-26 06:20 UT to 2024-03-26 11:24 UT, in a single run, at 5.5 and 9 GHz. The primary calibrator was 1934-638 and the phase calibrator 0941-080. \n\n\nFrom a preliminary analysis, the radio source reported in our previous GCN (Leung et al., GCN 35968) continues to be detected at a comparable flux level, ~0.1 mJy. Monitoring with ATCA will continue to assess the variability of the source. \n\n\nWe thank the CSIRO Space and Astronomy staff, in particular Jamie Stevens, for supporting these observations in a timely manner. We acknowledge the Gomeroi people as the traditional owners of the Observatory site. The Australia Telescope Compact Array is part of the Australia Telescope National Facility (https://ror.org/05qajvd42) which is funded by the Australian Government for operation as a National Facility managed by CSIRO.\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35990.",
"published": "2024-03-29T11:08:01.238851Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-03-29T11:08:01.238883Z",
"modified": "2024-03-29T11:08:01.244518Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2254,
"topic": "igwn.gwalert",
"uuid": "39b1b32e-4f8c-4ac1-ad25-c555ecaf1901",
"title": "S230820n - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230820n/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230820n/view/"
},
"event": {
"far": 1.943178990770387e-05,
"time": "2023-08-20T12:08:42.143Z",
"group": "CBC",
"search": "AllSky",
"area_50": 663.8812733620331,
"area_90": 3419.282310590295,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.004106583072100313,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "b6122efe2a87daf57b1b4957e643497c",
"classification": {
"BBH": 0.09641985893889284,
"BNS": 1.0809724096863652e-14,
"NSBH": 7.032093399034247e-13,
"Terrestrial": 0.9035801410603932
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-20T12:09:20Z",
"superevent_id": "S230820n",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-20T12:09:21.635597Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-20T12:09:21.635618Z",
"modified": "2023-08-20T12:09:21.639303Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2255,
"topic": "igwn.gwalert",
"uuid": "4846d7f9-bcee-41ac-8f59-ec4a00137d8f",
"title": "S230820n - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230820n/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230820n/view/"
},
"event": {
"far": 1.943178990770387e-05,
"time": "2023-08-20T12:08:42.143Z",
"group": "CBC",
"search": "AllSky",
"area_50": 663.8812733620331,
"area_90": 3419.282310590295,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.004106583072100313,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "b6122efe2a87daf57b1b4957e643497c",
"classification": {
"BBH": 0.09641985893889284,
"BNS": 1.0809724096863652e-14,
"NSBH": 7.032093399034247e-13,
"Terrestrial": 0.9035801410603932
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-20T12:13:54Z",
"superevent_id": "S230820n",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-20T12:13:55.339231Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-20T12:13:55.339249Z",
"modified": "2023-08-20T12:13:55.342857Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2256,
"topic": "igwn.gwalert",
"uuid": "0a8c4082-ab89-4131-b1c0-57e1e3588077",
"title": "S230820u - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230820u/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230820u/view/"
},
"event": {
"far": 1.64914e-05,
"time": "2023-08-20T12:54:31.793Z",
"group": "Burst",
"search": "BBH",
"area_50": 4318.1658046114535,
"area_90": 12827.764073407478,
"duration": 0.035756,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "8a2585c68b68d7e5a37051b3bb1fc79f",
"classification": {},
"skymap_version": 0,
"central_frequency": 26.331474
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-20T12:57:04Z",
"superevent_id": "S230820u",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-20T12:57:05.767170Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-20T12:57:05.767190Z",
"modified": "2023-08-20T12:57:05.773137Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2257,
"topic": "igwn.gwalert",
"uuid": "0cbad320-3df8-489b-ace0-4f21fdf59b01",
"title": "S230820u - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230820u/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230820u/view/"
},
"event": {
"far": 1.64914e-05,
"time": "2023-08-20T12:54:31.793Z",
"group": "Burst",
"search": "BBH",
"area_50": 4318.1658046114535,
"area_90": 12827.764073407478,
"duration": 0.035756,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "8a2585c68b68d7e5a37051b3bb1fc79f",
"classification": {},
"skymap_version": 0,
"central_frequency": 26.331474
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-20T13:01:38Z",
"superevent_id": "S230820u",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-20T13:01:38.881395Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-20T13:01:38.881429Z",
"modified": "2023-08-20T13:01:38.893216Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2305,
"topic": "igwn.gwalert",
"uuid": "d661b3e8-6bd7-40cc-8a6c-d1826e2558ca",
"title": "S230821bx - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230821bx/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230821bx/view/"
},
"event": {
"far": 1.66684e-05,
"time": "2023-08-21T17:51:29.484Z",
"group": "Burst",
"search": "BBH",
"area_50": 3468.8006356577534,
"area_90": 10986.353815814176,
"duration": 0.044858,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "b529aacf8bc5011da08ebae2e0f58289",
"classification": {},
"skymap_version": 0,
"central_frequency": 24.451647
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-21T17:52:47Z",
"superevent_id": "S230821bx",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-21T17:52:48.566371Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-21T17:52:48.566391Z",
"modified": "2023-08-21T17:52:48.571604Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2306,
"topic": "igwn.gwalert",
"uuid": "110b1d9b-386e-403a-ad34-44c0216dd288",
"title": "S230821bx - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230821bx/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230821bx/view/"
},
"event": {
"far": 1.66684e-05,
"time": "2023-08-21T17:51:29.484Z",
"group": "Burst",
"search": "BBH",
"area_50": 3468.8006356577534,
"area_90": 10986.353815814176,
"duration": 0.044858,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "b529aacf8bc5011da08ebae2e0f58289",
"classification": {},
"skymap_version": 0,
"central_frequency": 24.451647
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-21T17:57:22Z",
"superevent_id": "S230821bx",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-21T17:57:23.233042Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-21T17:57:23.233063Z",
"modified": "2023-08-21T17:57:23.236714Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2307,
"topic": "igwn.gwalert",
"uuid": "67433fe1-01dd-4941-b33a-b8b3bfbd27fa",
"title": "S230821ca - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230821ca/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230821ca/view/"
},
"event": {
"far": 1.08408e-05,
"time": "2023-08-21T18:08:13.276Z",
"group": "Burst",
"search": "AllSky",
"area_50": 561.4874486462706,
"area_90": 3316.0491922293204,
"duration": 0.002956,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "a93d5ba4c40d38a333b792a0da59e0af",
"classification": {},
"skymap_version": 0,
"central_frequency": 829.320374
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-21T18:10:40Z",
"superevent_id": "S230821ca",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-21T18:10:41.111584Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-21T18:10:41.111603Z",
"modified": "2023-08-21T18:10:41.115240Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4246,
"topic": "igwn.gwalert",
"uuid": "e6a0a38b-9a03-458a-ab66-04ab01d33e71",
"title": "S231028ah - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S231028ah/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S231028ah/view/"
},
"event": {
"far": 3.75901e-06,
"time": "2023-10-28T09:48:50.243Z",
"group": "Burst",
"search": "AllSky",
"area_50": 715.9174793651255,
"area_90": 2715.1149422581257,
"duration": 0.00868,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "20c3d119a2a279bcf66eedb0a18fa16b",
"classification": {},
"skymap_version": 0,
"central_frequency": 572.724915
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-10-28T09:50:56Z",
"superevent_id": "S231028ah",
"external_coinc": null
},
"message_text": "",
"published": "2023-10-31T23:28:01.048968Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-10-31T23:28:01.048993Z",
"modified": "2023-10-31T23:28:01.054220Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2258,
"topic": "igwn.gwalert",
"uuid": "4427747b-322e-4c34-b71c-0104df858306",
"title": "S230820y - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230820y/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230820y/view/"
},
"event": {
"far": 7.117475507521932e-07,
"time": "2023-08-20T13:47:35.843Z",
"group": "CBC",
"search": "AllSky",
"area_50": 585.8269643573946,
"area_90": 2176.2884220325564,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.039653679653679656,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "323f0496e9f899d578443e1f323d4959",
"classification": {
"BBH": 0.011563093408424223,
"BNS": 0.0,
"NSBH": 0.036666810418214846,
"Terrestrial": 0.951770096173361
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-20T13:48:06Z",
"superevent_id": "S230820y",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-20T13:48:07.659854Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-20T13:48:07.659888Z",
"modified": "2023-08-20T13:48:07.666727Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2259,
"topic": "igwn.gwalert",
"uuid": "2a41ade3-b87e-4de5-b1da-3e9c617a6189",
"title": "S230820y - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230820y/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230820y/view/"
},
"event": {
"far": 7.117475507521932e-07,
"time": "2023-08-20T13:47:35.843Z",
"group": "CBC",
"search": "AllSky",
"area_50": 585.8269643573946,
"area_90": 2176.2884220325564,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.039653679653679656,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "323f0496e9f899d578443e1f323d4959",
"classification": {
"BBH": 0.011563093408424223,
"BNS": 0.0,
"NSBH": 0.036666810418214846,
"Terrestrial": 0.951770096173361
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-20T13:52:40Z",
"superevent_id": "S230820y",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-20T13:52:41.470459Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-20T13:52:41.470478Z",
"modified": "2023-08-20T13:52:41.474274Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2260,
"topic": "igwn.gwalert",
"uuid": "d27ff185-7ce4-4b16-ac29-7184cae5365f",
"title": "S230820ac - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230820ac/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230820ac/view/"
},
"event": {
"far": 1.700306932658077e-05,
"time": "2023-08-20T14:04:37.874Z",
"group": "CBC",
"search": "AllSky",
"area_50": 474.5681005140892,
"area_90": 1943.8040823090628,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.8603851001226053,
"HasRemnant": 0.06581080520925174
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "587a2177a73689129c678ca83ca4824c",
"classification": {
"BBH": 0.0,
"BNS": 0.00036429857709313943,
"NSBH": 0.0009490905237341895,
"Terrestrial": 0.9986866108991727
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-20T14:05:07Z",
"superevent_id": "S230820ac",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-20T14:05:09.126495Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-20T14:05:09.126515Z",
"modified": "2023-08-20T14:05:09.131049Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2261,
"topic": "igwn.gwalert",
"uuid": "b3d2b633-aedd-4e39-a176-1fa8c349f20f",
"title": "S230820ac - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230820ac/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230820ac/view/"
},
"event": {
"far": 1.700306932658077e-05,
"time": "2023-08-20T14:04:37.874Z",
"group": "CBC",
"search": "AllSky",
"area_50": 474.5681005140892,
"area_90": 1943.8040823090628,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.8603851001226053,
"HasRemnant": 0.06581080520925174
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "587a2177a73689129c678ca83ca4824c",
"classification": {
"BBH": 0.0,
"BNS": 0.00036429857709313943,
"NSBH": 0.0009490905237341895,
"Terrestrial": 0.9986866108991727
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-20T14:09:44Z",
"superevent_id": "S230820ac",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-20T14:09:46.113517Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-20T14:09:46.113537Z",
"modified": "2023-08-20T14:09:46.117342Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2262,
"topic": "igwn.gwalert",
"uuid": "5150261f-3801-451d-9d00-8f950565db3e",
"title": "S230820am - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230820am/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230820am/view/"
},
"event": {
"far": 3.658828763452913e-06,
"time": "2023-08-20T16:22:54.660Z",
"group": "CBC",
"search": "AllSky",
"area_50": 977.1476264371012,
"area_90": 4050.4311317890924,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.004106583072100313,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "69d073863071eb746e31b01820038fb1",
"classification": {
"BBH": 0.34450843662940395,
"BNS": 1.4006559570053778e-14,
"NSBH": 9.88033876017838e-13,
"Terrestrial": 0.655491563369594
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-20T16:23:17Z",
"superevent_id": "S230820am",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-20T16:23:18.596620Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-20T16:23:18.596641Z",
"modified": "2023-08-20T16:23:18.602255Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2263,
"topic": "igwn.gwalert",
"uuid": "8bdbfcc4-8e44-4096-8613-b37454221424",
"title": "S230820am - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230820am/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230820am/view/"
},
"event": {
"far": 3.658828763452913e-06,
"time": "2023-08-20T16:22:54.660Z",
"group": "CBC",
"search": "AllSky",
"area_50": 977.1476264371012,
"area_90": 4050.4311317890924,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.004106583072100313,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "69d073863071eb746e31b01820038fb1",
"classification": {
"BBH": 0.34450843662940395,
"BNS": 1.4006559570053778e-14,
"NSBH": 9.88033876017838e-13,
"Terrestrial": 0.655491563369594
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-20T16:27:51Z",
"superevent_id": "S230820am",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-20T16:27:53.299876Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-20T16:27:53.299907Z",
"modified": "2023-08-20T16:27:53.305258Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2598,
"topic": "igwn.gwalert",
"uuid": "5c0ad7eb-2f06-49a1-92f6-83335c44d586",
"title": "S230830n - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230830n/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230830n/view/"
},
"event": {
"far": 2.092841507927958e-05,
"time": "2023-08-30T05:54:05.204Z",
"group": "CBC",
"search": "AllSky",
"area_50": 1342.8698323378674,
"area_90": 4757.955674702106,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.004106583072100313,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "4da3ead14196c9538cf488290cd9249e",
"classification": {
"BBH": 0.06659779152973368,
"BNS": 5.010422789812425e-14,
"NSBH": 3.4737912830948442e-12,
"Terrestrial": 0.9334022084667424
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-30T05:59:04Z",
"superevent_id": "S230830n",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-30T05:59:05.855907Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-30T05:59:05.855926Z",
"modified": "2023-08-30T05:59:05.859419Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2271,
"topic": "igwn.gwalert",
"uuid": "f2fc1756-2707-440c-8c0b-aae10b578acb",
"title": "S230820bj - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230820bj/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230820bj/view/"
},
"event": {
"far": 2.161423981306143e-05,
"time": "2023-08-20T19:55:45.858Z",
"group": "CBC",
"search": "AllSky",
"area_50": 867.4099823257411,
"area_90": 22838.85867348628,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.3311659451659451,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "a09fa1611f7fd5d3a3718dbafd30f05b",
"classification": {
"BBH": 0.0,
"BNS": 0.10467363124829224,
"NSBH": 0.0,
"Terrestrial": 0.8953263687517078
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-20T19:56:12Z",
"superevent_id": "S230820bj",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-20T19:56:13.631690Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-20T19:56:13.631710Z",
"modified": "2023-08-20T19:56:13.635424Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2272,
"topic": "igwn.gwalert",
"uuid": "85a62d3f-be40-4876-bd85-7eda1d500884",
"title": "S230820bj - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230820bj/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230820bj/view/"
},
"event": {
"far": 2.161423981306143e-05,
"time": "2023-08-20T19:55:45.858Z",
"group": "CBC",
"search": "AllSky",
"area_50": 867.4099823257411,
"area_90": 22838.85867348628,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.3311659451659451,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "a09fa1611f7fd5d3a3718dbafd30f05b",
"classification": {
"BBH": 0.0,
"BNS": 0.10467363124829224,
"NSBH": 0.0,
"Terrestrial": 0.8953263687517078
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-20T20:00:47Z",
"superevent_id": "S230820bj",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-20T20:00:48.498977Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-20T20:00:48.499006Z",
"modified": "2023-08-20T20:00:48.502701Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2273,
"topic": "igwn.gwalert",
"uuid": "43b61e99-5c2b-4af4-8625-d8fc95f09748",
"title": "S230820bn - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230820bn/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230820bn/view/"
},
"event": {
"far": 3.200613491571858e-06,
"time": "2023-08-20T20:38:44.457Z",
"group": "CBC",
"search": "AllSky",
"area_50": 4155.342837440488,
"area_90": 12743.83470888636,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.05584942834942835,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "98efaef9816810916047906ab4f78abe",
"classification": {
"BBH": 0.15539560837520733,
"BNS": 0.0,
"NSBH": 0.41562735239193904,
"Terrestrial": 0.4289770392328537
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-20T20:39:08Z",
"superevent_id": "S230820bn",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-20T20:39:09.136987Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-20T20:39:09.137030Z",
"modified": "2023-08-20T20:39:09.140742Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2274,
"topic": "igwn.gwalert",
"uuid": "8c10bbfc-3af8-41f1-b8b1-badec9f90ebd",
"title": "S230820bn - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230820bn/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230820bn/view/"
},
"event": {
"far": 3.200613491571858e-06,
"time": "2023-08-20T20:38:44.457Z",
"group": "CBC",
"search": "AllSky",
"area_50": 4155.342837440488,
"area_90": 12743.83470888636,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.05584942834942835,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "98efaef9816810916047906ab4f78abe",
"classification": {
"BBH": 0.15539560837520733,
"BNS": 0.0,
"NSBH": 0.41562735239193904,
"Terrestrial": 0.4289770392328537
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-20T20:43:42Z",
"superevent_id": "S230820bn",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-20T20:43:43.952628Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-20T20:43:43.952667Z",
"modified": "2023-08-20T20:43:43.959091Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2275,
"topic": "igwn.gwalert",
"uuid": "29b2a770-2955-428d-ac49-909314be8738",
"title": "S230820bq - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230820bq/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230820bq/view/"
},
"event": {
"far": 2.68879240689624e-09,
"time": "2023-08-20T21:25:15.973Z",
"group": "CBC",
"search": "AllSky",
"area_50": 596.7377817451397,
"area_90": 2203.9851123245244,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.006205128205128205,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "7e7ec93d736e341ca9897181f081895b",
"classification": {
"BBH": 0.99746893739457,
"BNS": 3.3110325022052054e-19,
"NSBH": 1.1352715078143542e-09,
"Terrestrial": 0.002531061470158469
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-20T21:25:45Z",
"superevent_id": "S230820bq",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-20T21:25:47.591897Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-20T21:25:47.591917Z",
"modified": "2023-08-20T21:25:47.595627Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2276,
"topic": "igwn.gwalert",
"uuid": "b5aea3ef-20f6-48b6-8923-f2ff54c6bd05",
"title": "S230820bq - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230820bq/files/bayestar.multiorder.fits,1",
"gracedb": "https://gracedb.ligo.org/superevents/S230820bq/view/"
},
"event": {
"far": 4.230770400681649e-08,
"time": "2023-08-20T21:25:15.975Z",
"group": "CBC",
"search": "AllSky",
"area_50": 518.6834727405012,
"area_90": 1974.0186535366647,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.0,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "7b9a8d07d092495af31c1bc20c5bd7c9",
"classification": {
"BBH": 0.9576683641601308,
"BNS": 0.0,
"NSBH": 0.0,
"Terrestrial": 0.04233163583986921
},
"skymap_version": 1,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-20T21:30:32Z",
"superevent_id": "S230820bq",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-20T21:30:34.279778Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-20T21:30:34.279801Z",
"modified": "2023-08-20T21:30:34.283393Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6709,
"topic": "igwn.gwalert",
"uuid": "d4e28bd8-75e0-402e-962f-69e6f61f1e3c",
"title": "S240420c - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S240420c/files/bayestar.multiorder.fits,1",
"gracedb": "https://gracedb.ligo.org/superevents/S240420c/view/"
},
"event": {
"far": 1.184928979825197e-06,
"time": "2024-04-20T00:34:04.366Z",
"group": "CBC",
"search": "AllSky",
"area_50": 1483.8711647333434,
"area_90": 5068.494323430237,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.04264138160689884,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1",
"V1"
],
"significant": false,
"skymap_hash": "92e5ec5631acd816939bb0b8f386dd28",
"classification": {
"BBH": 0.6512698995687429,
"BNS": 7.302858387745579e-13,
"NSBH": 5.508134076061659e-11,
"Terrestrial": 0.3487301003754454
},
"skymap_version": 1,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2024-04-20T00:39:08Z",
"superevent_id": "S240420c",
"external_coinc": null
},
"message_text": "",
"published": "2024-04-20T00:39:09.274702Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2024-04-20T00:39:09.274721Z",
"modified": "2024-04-20T00:39:09.280541Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2282,
"topic": "igwn.gwalert",
"uuid": "ece748f3-bfe1-40c1-bb3f-521203685fd4",
"title": "S230821e - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230821e/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230821e/view/"
},
"event": {
"far": 1.312204767600633e-05,
"time": "2023-08-21T01:49:20.149Z",
"group": "CBC",
"search": "AllSky",
"area_50": 5937.163246223796,
"area_90": 19102.32336500616,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.145466491211954,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "dc926be2dbb1f0a87eaceb4421e454bf",
"classification": {
"BBH": 0.0003264478713909838,
"BNS": 0.010861351701762374,
"NSBH": 0.14262558901180455,
"Terrestrial": 0.846186611415042
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-21T01:54:18Z",
"superevent_id": "S230821e",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-21T01:54:19.812280Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-21T01:54:19.812300Z",
"modified": "2023-08-21T01:54:19.815635Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2283,
"topic": "igwn.gwalert",
"uuid": "84e1b812-af9e-4a70-b185-bedbcb1c85ed",
"title": "S230821ak - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230821ak/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230821ak/view/"
},
"event": {
"far": 4.85206e-06,
"time": "2023-08-21T07:38:41.316Z",
"group": "Burst",
"search": "BBH",
"area_50": 922.3837160870726,
"area_90": 3302.620493905942,
"duration": 0.022249,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "8f4940232cdf734794c9540500028525",
"classification": {},
"skymap_version": 0,
"central_frequency": 65.872314
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-21T07:40:00Z",
"superevent_id": "S230821ak",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-21T07:40:01.110133Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-21T07:40:01.110168Z",
"modified": "2023-08-21T07:40:01.116210Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2284,
"topic": "igwn.gwalert",
"uuid": "c8c79c75-ea23-4747-bf6e-c53cd7f3af73",
"title": "S230821ak - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230821ak/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230821ak/view/"
},
"event": {
"far": 4.85206e-06,
"time": "2023-08-21T07:38:41.316Z",
"group": "Burst",
"search": "BBH",
"area_50": 922.3837160870726,
"area_90": 3302.620493905942,
"duration": 0.022249,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "8f4940232cdf734794c9540500028525",
"classification": {},
"skymap_version": 0,
"central_frequency": 65.872314
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-21T07:44:34Z",
"superevent_id": "S230821ak",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-21T07:44:35.006858Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-21T07:44:35.006877Z",
"modified": "2023-08-21T07:44:35.010542Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2285,
"topic": "igwn.gwalert",
"uuid": "88704835-96c1-437c-9537-6755666426e3",
"title": "S230821am - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230821am/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230821am/view/"
},
"event": {
"far": 1.92766e-05,
"time": "2023-08-21T07:45:17.735Z",
"group": "Burst",
"search": "AllSky",
"area_50": 845.1687007276453,
"area_90": 3151.5476377679324,
"duration": 0.015056,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "230b82c681eb0acdae2c02127ca96781",
"classification": {},
"skymap_version": 0,
"central_frequency": 1212.585205
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-21T07:46:31Z",
"superevent_id": "S230821am",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-21T07:46:32.231289Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-21T07:46:32.231309Z",
"modified": "2023-08-21T07:46:32.234781Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2286,
"topic": "igwn.gwalert",
"uuid": "94c2cdaf-da63-4e41-8fd9-60a04fdd1806",
"title": "S230821am - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230821am/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230821am/view/"
},
"event": {
"far": 1.92766e-05,
"time": "2023-08-21T07:45:17.735Z",
"group": "Burst",
"search": "AllSky",
"area_50": 845.1687007276453,
"area_90": 3151.5476377679324,
"duration": 0.015056,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "230b82c681eb0acdae2c02127ca96781",
"classification": {},
"skymap_version": 0,
"central_frequency": 1212.585205
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-21T07:51:05Z",
"superevent_id": "S230821am",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-21T07:51:05.933966Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-21T07:51:05.933994Z",
"modified": "2023-08-21T07:51:05.937959Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2600,
"topic": "igwn.gwalert",
"uuid": "0eea3aa8-18c2-4041-8112-a0b767498d4e",
"title": "S230830q - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230830q/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230830q/view/"
},
"event": {
"far": 1.334454518340415e-07,
"time": "2023-08-30T06:47:44.227Z",
"group": "CBC",
"search": "AllSky",
"area_50": 412.1456356515087,
"area_90": 1676.0694094867004,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.004106583072100313,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "d8784eebc80cd2485cc0bc608ed38272",
"classification": {
"BBH": 0.9227241842398558,
"BNS": 4.4585952030519326e-17,
"NSBH": 3.306156377497461e-15,
"Terrestrial": 0.07727581576014086
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-30T06:48:10Z",
"superevent_id": "S230830q",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-30T06:48:11.845983Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-30T06:48:11.846002Z",
"modified": "2023-08-30T06:48:11.852223Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2296,
"topic": "igwn.gwalert",
"uuid": "7b34f251-5493-4adc-b77f-9ac649ac414f",
"title": "S230821bh - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230821bh/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230821bh/view/"
},
"event": {
"far": 1.537408e-05,
"time": "2023-08-21T14:56:52.062Z",
"group": "CBC",
"search": "AllSky",
"area_50": 696.4039021139658,
"area_90": 3068.457566892026,
"duration": null,
"pipeline": "MBTA",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.5895551813043801,
"HasRemnant": 0.06013140604678977
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "533227fdc1b77e791e7d3f8f687c0334",
"classification": {
"BBH": 0.0,
"BNS": 0.000825633,
"NSBH": 0.000154493,
"Terrestrial": 0.999019874
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-21T14:57:22Z",
"superevent_id": "S230821bh",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-21T14:57:23.496794Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-21T14:57:23.496822Z",
"modified": "2023-08-21T14:57:23.502498Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9202,
"topic": "lvk-users.beccatest",
"uuid": "ad1b85fd-863b-4e01-a3e4-e6b0ddef8253",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"V1"
],
"time": [
1400510700
],
"range": 48.59237497078904
},
"message_text": "",
"published": "2024-05-23T14:45:06.402719Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T14:45:06.402759Z",
"modified": "2024-05-23T14:45:06.402777Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9203,
"topic": "lvk-users.beccatest",
"uuid": "fc2b867d-d742-4e33-8643-74ced6a82e75",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"H1"
],
"time": [
1400510800
],
"range": 151.66928613221353
},
"message_text": "",
"published": "2024-05-23T14:46:38.686681Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T14:46:38.686702Z",
"modified": "2024-05-23T14:46:38.686710Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9204,
"topic": "lvk-users.beccatest",
"uuid": "f0434f20-1817-4ac1-a06e-9d059b4f932e",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"L1"
],
"time": [
1400510800
],
"range": 167.4193647527923
},
"message_text": "",
"published": "2024-05-23T14:46:40.701808Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T14:46:40.701828Z",
"modified": "2024-05-23T14:46:40.701836Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2297,
"topic": "igwn.gwalert",
"uuid": "49c1ac52-ada2-481c-af66-04574803d0d1",
"title": "S230821bh - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230821bh/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230821bh/view/"
},
"event": {
"far": 1.537408e-05,
"time": "2023-08-21T14:56:52.062Z",
"group": "CBC",
"search": "AllSky",
"area_50": 696.4039021139658,
"area_90": 3068.457566892026,
"duration": null,
"pipeline": "MBTA",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.5895551813043801,
"HasRemnant": 0.06013140604678977
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "533227fdc1b77e791e7d3f8f687c0334",
"classification": {
"BBH": 0.0,
"BNS": 0.000825633,
"NSBH": 0.000154493,
"Terrestrial": 0.999019874
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-21T15:01:56Z",
"superevent_id": "S230821bh",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-21T15:01:58.117514Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-21T15:01:58.117534Z",
"modified": "2023-08-21T15:01:58.122202Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2298,
"topic": "gcn.circular",
"uuid": "085315c2-133f-49ec-893a-3a3d0fe092c4",
"title": "Swift Trigger 1186386 is not a GRB",
"submitter": "Hop gcn.circular",
"authors": "Boris Sbarufatti at INAF-OAB <boris.sbarufatti@inaf.it>",
"data": {
"date": "23/08/21 15:09:06 GMT",
"from": "Boris Sbarufatti at INAF-OAB <boris.sbarufatti@inaf.it>",
"title": "GCN CIRCULAR",
"number": "34510",
"subject": "Swift Trigger 1186386 is not a GRB"
},
"message_text": "\nB. Sbarufatti (INAF-OAB) report on behalf of the Neil Gehrels Swift\nObservatory Team:\n\nSwift BAT triggers 1186386 at 14:52:00 UT on 2023-08-21, is due to\nmisidentification of a known source during a Star Tracker\nLoss-of-Lock. It is not an astrophysical event.\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyNjMwNTUxLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.6x1WNJ3DBXp1qEAaoVTciIYhEqa-2AoFfy3FxtsuWNQ\n\n",
"published": "2023-08-21T15:09:21.215051Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-21T15:09:21.215076Z",
"modified": "2023-08-21T15:09:21.218796Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2299,
"topic": "gcn.circular",
"uuid": "66f2315d-7760-4e5d-a147-e7435b200c0c",
"title": "Konus-Wind detection of GRB 230818A",
"submitter": "Hop gcn.circular",
"authors": "Dmitry Frederiks at Ioffe Institute <fred@mail.ioffe.ru>",
"data": {
"date": "23/08/21 15:16:55 GMT",
"from": "Dmitry Frederiks at Ioffe Institute <fred@mail.ioffe.ru>",
"title": "GCN CIRCULAR",
"number": "34511",
"subject": "Konus-Wind detection of GRB 230818A"
},
"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 230818A (Swift detection: Tohuvavohu et al., GCN 34479;\nFermi GBM observation: Veres et al., GCN 34501)\ntriggered Konus-Wind (KW) at T0=84458.443 s UT (23:27:38.443).\n\nThe burst light curve shows a single FRED-like pulse\nwhich starts at ~T0-0.256 s and has a duration of ~10 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/GRB230818_T84458/\n\nAs observed by Konus-Wind, the burst had\na total fluence of (4.91 ± 1.76)x10^-6 erg/cm^2 and\na 64-ms peak energy flux, measured from T0,\nof (3.08 ± 0.90)x10^-6 erg/cm^2/s (both in the 20 keV - 10 MeV energy range).\n\nThe time-integrated spectrum of the burst (measured from T0 to T0+16.640 s)\nis best fit in the 20 keV - 15 MeV range by a power law with exponential\ncutoff (CPL) model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)\nwith alpha = -1.00(-0.23,+0.27) and Ep = 251(-49,+81) keV (chi2 = 91/98 dof).\nFitting this spectrum by a Band function yields the same values of alpha and Ep,\nand an upper limit on the high energy photon index beta of -2.5 (chi2 = 91/97 dof).\n\nThe spectrum near the peak count rate (measured from T0 to T0+0.256 s)\nis best fit in the 20 keV - 15 MeV range by a CPL model\nwith alpha = -0.40(-0.44,+0.56) and Ep = 259(-45,+64) keV (chi2 = 18/17 dof).\nFitting this spectrum by a Band function yields the same values of alpha and Ep,\nand an upper limit on the high energy photon index beta of -2.7 (chi2 = 18/16 dof).\n\nAssuming the redshift z=2.42 (Malesani et al., GCN 34485)\nand a standard cosmology with H_0 = 67.3 km/s/Mpc, Omega_M = 0.315,\nand Omega_Lambda = 0.685 (Planck Collaboration, 2014),\nwe estimate the burst isotropic energy release E_iso to (6.95 ± 2.49)x10^52 erg,\nthe isotropic peak luminosity L_iso to (1.49 ± 0.44)x10^53 erg/s,\nthe rest-frame peak energy of the time-integrated spectrum Ep,i,z to ~860 keV,\nand the rest-frame peak energy at the peak of the emission Ep,p,z to ~890 keV.\nWith the obtained estimates, GRB 230818A is inside 90% prediction band for\nthe 'Amati' relation and inside 68% prediction band for the 'Yonetoku' relation\nderived for the sample of >300 long KW GRBs with known redshifts\n(Tsvetkova et al., 2017; Tsvetkova et al., 2021), see\nhttp://www.ioffe.ru/LEA/GRBs/GRB230818_T84458/GRB230818A_rest_frame.pdf\n\nAll the quoted errors are estimated at the 68% confidence level.\nAll the presented results are preliminary.\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyNjMxMDIwLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.0LM2FpHJ8un1O6ekmh6t5JvSbZjIE3qq9PR-2F93vwE\n\n",
"published": "2023-08-21T15:17:06.321075Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-21T15:17:06.321118Z",
"modified": "2023-08-21T15:17:06.325773Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2300,
"topic": "gcn.circular",
"uuid": "603084b6-cb42-4fed-b2cf-dc4326742b27",
"title": "Swift Trigger 1186390 is not a GRB",
"submitter": "Hop gcn.circular",
"authors": "Boris Sbarufatti at INAF-OAB <boris.sbarufatti@inaf.it>",
"data": {
"date": "23/08/21 15:21:52 GMT",
"from": "Boris Sbarufatti at INAF-OAB <boris.sbarufatti@inaf.it>",
"title": "GCN CIRCULAR",
"number": "34512",
"subject": "Swift Trigger 1186390 is not a GRB"
},
"message_text": "\nB. Sbarufatti (INAF-OAB) report on behalf of the Neil Gehrels Swift\nObservatory Team:\n\nSwift BAT trigger 1186390 at 15:12:00.13 UT on 2023-08-21, is due\nto misidentification of a known source during a Star Tracker\nLoss-of-Lock. It is not an astrophysical event.\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyNjMxMzE0LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.0AVOvg5wN5NmkmvV__k11tImrQzsBHAsVIDLwXoWgio\n\n",
"published": "2023-08-21T15:22:00.017855Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-21T15:22:00.017873Z",
"modified": "2023-08-21T15:22:00.046811Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2301,
"topic": "gcn.circular",
"uuid": "e5edd3ca-ade9-4173-83f3-797a2a6b94d5",
"title": "Swift Trigger 1186391 is not a GRB",
"submitter": "Hop gcn.circular",
"authors": "Boris Sbarufatti at INAF-OAB <boris.sbarufatti@inaf.it>",
"data": {
"date": "23/08/21 15:32:22 GMT",
"from": "Boris Sbarufatti at INAF-OAB <boris.sbarufatti@inaf.it>",
"title": "GCN CIRCULAR",
"number": "34513",
"subject": "Swift Trigger 1186391 is not a GRB"
},
"message_text": "\nB. Sbarufatti (INAF-OAB) report on behalf of the Neil Gehrels Swift\nObservatory Team:\n\nSwift BAT trigger 1186391 at 15:25:12.13 UT on 2023-08-21, is due\nto misidentification of a known source during a Star Tracker\nLoss-of-Lock. It is not an astrophysical event.\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyNjMxOTQ4LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.nR2s-jxxxm6a8vIiGI2xNLzDORcqyaQISX9qzrksMdc\n\n",
"published": "2023-08-21T15:32:33.512052Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-21T15:32:33.512075Z",
"modified": "2023-08-21T15:32:33.516322Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2302,
"topic": "gcn.circular",
"uuid": "85fd4b29-cedf-4680-9b35-c666cce83afd",
"title": "GRB 20230818A: GIT optical upper limit",
"submitter": "Hop gcn.circular",
"authors": "Varun Bhalerao at IIT Bombay <varunb@iitb.ac.in>",
"data": {
"date": "23/08/21 16:35:40 GMT",
"from": "Varun Bhalerao at IIT Bombay <varunb@iitb.ac.in>",
"title": "GCN CIRCULAR",
"number": "34514",
"subject": "GRB 20230818A: GIT optical upper limit"
},
"message_text": "R. Kumar (IITB), A. Salgundi (IITB), V. Swain (IITB), H. Kumar (IITB), V. Bhalerao (IITB), G.C. Anupama (IIA), S. Barway (IIA) and K. Angail (IAO) report on behalf of the GIT team:\n\nWe observed the field of GRB230818A (Lipunov et al., GCN 34476; Fermi GBM team, GCN 34478; Tohuvavohu et al., GCN 34479; Gompertz et al., GCN 34480; Moskvitin et al., GCN 34483; Malesani et al., GCN 34485; Siegel et al., GCN 34486; Pankov et al., GCN 34487; Quadri et al., GCN 34488; Pavoni et al., GCN 34490; Klose et al., GCN 34491; Pari et al., GCN 34492; Odeh et al., GCN 34493; Pichay et al., GCN 34498) with the 0.7m GROWTH-India Telescope (GIT). The observations started at 2023-08-19 15:32:24.081 UT, 0.67 days after the Fermi GBM trigger. We obtained 6 images of 300-sec exposures in the r' filter. We did not detect any new source in our stacked image around R.A.= 19h 03m 33.11s, DEC.=+40d 53m 48.5s. The obtained upper limits follow as:\n\n-------------------------------------------------------\nJD (mid) | T-T0 (hours) | Filter | Exposure (s) | Limiting Magnitude (AB)\n-------------------------------------------------------\n2460176.15764106 | 16.326 | r' | 6 x 300 | 21.35\n-------------------------------------------------------\n\nOur results are consistent with the upper limits reported by AKO (Odeh et al., GCN 34493) and the weak detection by SAO RAS Zeiss-1000 (Moskvitin et al., GCN 34495). The magnitudes are calibrated against PanSTARRS DR1 (Chambers et al., 2016) and not corrected for Galactic extinction.\n\nThe GROWTH India Telescope (GIT, Kumar et al. 2022) is a 70-cm telescope with a 0.7-degree field of view, set up by the Indian Institute of Astrophysics (IIA) and the Indian Institute of Technology Bombay (IITB) with funding from DST-SERB and IUSSTF. It is located at the Indian Astronomical Observatory (Hanle), operated by IIA. We acknowledge funding by the IITB alumni batch of 1994, which partially supports the operations of the telescope. Telescope technical details are available at https://sites.google.com/view/growthindia/.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyNjM1NzQ2LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.j-r3LGCcKJZCHhHKX-SqS9GsHEYFy6eWDle6FpFU1b8\n\n",
"published": "2023-08-21T16:35:51.974520Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-21T16:35:51.974537Z",
"modified": "2023-08-21T16:35:51.979284Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2303,
"topic": "igwn.gwalert",
"uuid": "0e5cf140-68b2-483f-a785-1688ab6bb71a",
"title": "S230821bp - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230821bp/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230821bp/view/"
},
"event": {
"far": 1.289e-05,
"time": "2023-08-21T16:44:49.957Z",
"group": "Burst",
"search": "AllSky",
"area_50": 480.0759650607875,
"area_90": 2094.0376448018615,
"duration": 0.00961,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "0e32423f6940638d32ae91f08bd331ec",
"classification": {},
"skymap_version": 0,
"central_frequency": 1012.815491
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-21T16:45:55Z",
"superevent_id": "S230821bp",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-21T16:45:56.496165Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-21T16:45:56.496184Z",
"modified": "2023-08-21T16:45:56.499635Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2304,
"topic": "igwn.gwalert",
"uuid": "6c9d1d91-eac6-42cd-9515-40c05ce44cd1",
"title": "S230821bp - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230821bp/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230821bp/view/"
},
"event": {
"far": 1.289e-05,
"time": "2023-08-21T16:44:49.957Z",
"group": "Burst",
"search": "AllSky",
"area_50": 480.0759650607875,
"area_90": 2094.0376448018615,
"duration": 0.00961,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "0e32423f6940638d32ae91f08bd331ec",
"classification": {},
"skymap_version": 0,
"central_frequency": 1012.815491
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-21T16:50:31Z",
"superevent_id": "S230821bp",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-21T16:50:32.122744Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-21T16:50:32.122766Z",
"modified": "2023-08-21T16:50:32.126254Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2802,
"topic": "igwn.gwalert",
"uuid": "450567c2-9c87-487b-8b42-36184f7e3737",
"title": "S230909g - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230909g/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230909g/view/"
},
"event": {
"far": 2.088402e-05,
"time": "2023-09-09T08:11:23.981Z",
"group": "CBC",
"search": "AllSky",
"area_50": 510.92000652229797,
"area_90": 2087.323295640172,
"duration": null,
"pipeline": "MBTA",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.0,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "6507f679fb6e1507a20d67c2fb74e57a",
"classification": {
"BBH": 0.0,
"BNS": 0.000624199,
"NSBH": 1.038e-06,
"Terrestrial": 0.999374763
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-09-09T08:11:55Z",
"superevent_id": "S230909g",
"external_coinc": null
},
"message_text": "",
"published": "2023-09-09T08:11:56.892049Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-09-09T08:11:56.892070Z",
"modified": "2023-09-09T08:11:56.895813Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2310,
"topic": "gcn.circular",
"uuid": "1a2d20b8-7dbc-4af6-bd46-decb56d82f77",
"title": "GRB 230812B: SAO RAS RC-500 and Zeiss-1000 observations",
"submitter": "Hop gcn.circular",
"authors": "Moskvitin Alexander at SAO RAS <mosk@sao.ru>",
"data": {
"date": "23/08/21 19:58:42 GMT",
"from": "Moskvitin Alexander at SAO RAS <mosk@sao.ru>",
"title": "GCN CIRCULAR",
"number": "34516",
"subject": "GRB 230812B: SAO RAS RC-500 and Zeiss-1000 observations"
},
"message_text": "A. S. Moskvitin, V. V. Vlasyuk (SAO RAS), V. P. Goranskij (SAI MSU),\nreport on behalf of the GRB follow-up team.\n\nWe observed the field of GRB 230812B (Fermi GBM Team, GCN 34386;\nScotton et al., GCN 34392; Page et al. GCN 34394; Kuin et al.,\nGCN 34399; Casentini et al., GCN 34402) with the SAO RAS optical\ntelescopes RC-500 and Zeiss-1000 equipped with the CCD photometers.\nWe obtained 90 x 60 sec. images in Rc band with the 0.5-m telescope\non August 20, 18:36:51--20:27:56 and 6 x 300 sec. images in Rc band\nwith the 1-m telescope on August 20, 21:09:05--21:43:00 UT.\n\nThe OT (Lesage et al., GCN 34387; Scotton et al., GCN 34392; Page,\nGCN 34394; Zheng & Filippenko, GCN 34395; Lipunov et al., GCN 34396;\nSalgundi et al., GCN 34397; Ackley et al., GCN 34398; Xiong et al.,\nGCN 34401; Casentini et al., GCN 34402; Frederiks et al., GCN 34403;\nMao et al., GCN 34404; Odeh et al., GCN 34405; Moskvitin & Spiridonova,\nGCN 34406; Leonini et al., GCN 34408; de Ugarte Postigo et al.,\nGCNs 24409, 34410; Belkin et al. GCN 34412; Ruocco et al. GCN 34413;\nFrederiks et al. GCN 34414; Ruocco et al. GCN 34415; Shrestha et al.\nGCN 34416; Quadri et al. GCN 34417; Adami et al. GCN 34418;\nMoretti et al. GCN 34419; Kumar et al. GCN 34420; Belkin et al. GCNs\n34421, GCN 34423; Pyshna et al., GCN 34425; Moskvitin & Spiridonova,\nGCN 34428; Quadri & Strabla, GCN 34430; Mihov et al., GCN 34431;\nBelkin et al. GCN 34432; Klose et al., GCN 34435; Scarfi, GCN 34436;\nMoskvitin & Spiridonova, GCNs 34442, 34461, 34471, 34475;\nVinko et al., GCN 34463; H. Kumar et al., GCN 34500; Turpin et al.,\nGCN 34508) is clearly detected in our stacked frames\nwith the brightness of R = 21.58 +/- 0.11 (t_mid - t0 = 8.0237 days)\nand R = 21.44 +/- 0.07 (t_mid - t0 = 8.1027 days).\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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyNjQ3OTI3LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.nQ5fG6IJYFuSZvOMVjJzNGWTcAVjRdiMXdpWa--Z_is\n\n",
"published": "2023-08-21T19:58:52.802931Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-21T19:58:52.802948Z",
"modified": "2023-08-21T19:58:52.808331Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2311,
"topic": "igwn.gwalert",
"uuid": "66f007ab-3eb3-48b8-9966-8563836d5c25",
"title": "S230821ck - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230821ck/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230821ck/view/"
},
"event": {
"far": 3.30853e-06,
"time": "2023-08-21T21:48:54.313Z",
"group": "Burst",
"search": "BBH",
"area_50": 5472.19456677681,
"area_90": 16306.636232807761,
"duration": 0.034397,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "8974ff4e96ec26e51342168a2a2dbd8f",
"classification": {},
"skymap_version": 0,
"central_frequency": 21.092491
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-21T21:50:53Z",
"superevent_id": "S230821ck",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-21T21:50:54.932275Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-21T21:50:54.932298Z",
"modified": "2023-08-21T21:50:54.938782Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2312,
"topic": "igwn.gwalert",
"uuid": "637036e8-9440-4c89-81f7-6b5abfe65642",
"title": "S230821ck - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230821ck/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230821ck/view/"
},
"event": {
"far": 3.30853e-06,
"time": "2023-08-21T21:48:54.313Z",
"group": "Burst",
"search": "BBH",
"area_50": 5472.19456677681,
"area_90": 16306.636232807761,
"duration": 0.034397,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "8974ff4e96ec26e51342168a2a2dbd8f",
"classification": {},
"skymap_version": 0,
"central_frequency": 21.092491
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-21T21:55:28Z",
"superevent_id": "S230821ck",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-21T21:55:29.611244Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-21T21:55:29.611265Z",
"modified": "2023-08-21T21:55:29.614721Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2313,
"topic": "gcn.circular",
"uuid": "c249a815-05ca-4373-82be-0abe13109ea1",
"title": "Swift GRB230821.64: 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": "23/08/22 00:11:06 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "34517",
"subject": "Swift GRB230821.64: 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) was pointed to the Swift GRB230821.64 (trigger No 1186391,05h 34m 58.39s , +21d 24m 12.2s, R=0.05) errorbox 7286 sec after notice time and 7381 sec after trigger time at 2023-08-21 17:28:13 UT, with upper limit up to 15.6 mag. The observations began at zenith distance = 84 deg. The sun altitude is -26.7 deg.\n\nMASTER-Tavrida robotic telescope located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the Swift GRB230821.64 errorbox 30910 sec after notice time and 31005 sec after trigger time at 2023-08-22 00:01:57 UT, with upper limit up to 15.6 mag. The observations began at zenith distance = 67 deg. The sun altitude is -26.0 deg.\n\nThe galactic latitude b = -5 deg., longitude l = 185 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"57614\n\nWe obtain a following upper limits.\n\nTmid-T0 | Site |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____|_______|______|________\n\n 7426 | MASTER-Tunka | C | 90 | 13.6 |\n 7427 | MASTER-Tunka | C | 90 | 14.7 |\n 8531 | MASTER-Tunka | C | 90 | 14.5 |\n 8532 | MASTER-Tunka | C | 90 | 15.3 |\n 8648 | MASTER-Tunka | C | 90 | 14.7 |\n 8648 | MASTER-Tunka | C | 90 | 15.6 |\n 9783 | MASTER-Tunka | C | 90 | 13.6 |\n 9784 | MASTER-Tunka | C | 90 | 14.6 |\n 9900 | MASTER-Tunka | C | 90 | 12.7 |\n 9901 | MASTER-Tunka | C | 90 | 13.9 |\n 31096 | MASTER-Tavrida | C | 180 | 15.6 |\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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyNjYzMDcyLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.GtnV6HBEBLf3LACAItsRgHNlgCx031WhoPyL3xcXft0\n\n",
"published": "2023-08-22T00:11:17.296234Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-22T00:11:17.296252Z",
"modified": "2023-08-22T00:11:17.302681Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2314,
"topic": "igwn.gwalert",
"uuid": "ba3bbddc-0491-41ba-b9a9-31dc0467fd80",
"title": "S230822d - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230822d/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230822d/view/"
},
"event": {
"far": 1.59565e-05,
"time": "2023-08-22T00:29:09.782Z",
"group": "Burst",
"search": "AllSky",
"area_50": 1505.6927995088336,
"area_90": 5577.106272428205,
"duration": 0.010993,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "fc8dd4eaf517e15e3fd05170b0246fcb",
"classification": {},
"skymap_version": 0,
"central_frequency": 1671.683105
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-22T00:30:32Z",
"superevent_id": "S230822d",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-22T00:30:32.993724Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-22T00:30:32.993743Z",
"modified": "2023-08-22T00:30:33.000322Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2602,
"topic": "igwn.gwalert",
"uuid": "bf56cb79-7548-47d5-b7c9-39753092062d",
"title": "S230830ab - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230830ab/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230830ab/view/"
},
"event": {
"far": 4.300576990014476e-06,
"time": "2023-08-30T09:43:02.187Z",
"group": "CBC",
"search": "AllSky",
"area_50": 413.6668553834539,
"area_90": 1527.3046108730211,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.5505836931983685,
"HasRemnant": 0.08648472365630942
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "d00475511e4ef9afa1fb67c7dab528a3",
"classification": {
"BBH": 0.0,
"BNS": 0.0074080583882985525,
"NSBH": 0.0019175404230514451,
"Terrestrial": 0.99067440118865
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-30T09:43:33Z",
"superevent_id": "S230830ab",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-30T09:43:35.128851Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-30T09:43:35.128874Z",
"modified": "2023-08-30T09:43:35.135327Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9205,
"topic": "lvk-users.beccatest",
"uuid": "26bdcfe5-7ba0-4d7e-b303-b56eb7b32c31",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"V1"
],
"time": [
1400510800
],
"range": 48.893715355647686
},
"message_text": "",
"published": "2024-05-23T14:46:47.725104Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T14:46:47.725124Z",
"modified": "2024-05-23T14:46:47.725132Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9206,
"topic": "lvk-users.beccatest",
"uuid": "0a07bef9-2bc9-410c-968d-8df0ea02c607",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"H1"
],
"time": [
1400510900
],
"range": 151.67212511807955
},
"message_text": "",
"published": "2024-05-23T14:48:18.879027Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T14:48:18.879047Z",
"modified": "2024-05-23T14:48:18.879054Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9207,
"topic": "lvk-users.beccatest",
"uuid": "a47db8f3-1b5c-4efc-b512-ef77c2db9cfb",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"L1"
],
"time": [
1400510900
],
"range": 167.04835888135386
},
"message_text": "",
"published": "2024-05-23T14:48:19.893308Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T14:48:19.893328Z",
"modified": "2024-05-23T14:48:19.893336Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9208,
"topic": "lvk-users.beccatest",
"uuid": "917aaa0d-f566-4923-9655-f3c2df8a7c5b",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"V1"
],
"time": [
1400510900
],
"range": 49.09391312824994
},
"message_text": "",
"published": "2024-05-23T14:48:25.917390Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T14:48:25.917410Z",
"modified": "2024-05-23T14:48:25.917418Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9209,
"topic": "lvk-users.beccatest",
"uuid": "b8d32392-941f-46d5-835a-6d39e6048493",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"H1"
],
"time": [
1400511000
],
"range": 151.2958030104911
},
"message_text": "",
"published": "2024-05-23T14:50:00.228247Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T14:50:00.228267Z",
"modified": "2024-05-23T14:50:00.228275Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9210,
"topic": "lvk-users.beccatest",
"uuid": "7e18ab7a-4c69-4210-a71e-f20826f5cd6c",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"L1"
],
"time": [
1400511000
],
"range": 166.5461064388546
},
"message_text": "",
"published": "2024-05-23T14:50:00.242809Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T14:50:00.242829Z",
"modified": "2024-05-23T14:50:00.242836Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9211,
"topic": "lvk-users.beccatest",
"uuid": "383d8f98-9734-4ee5-8c8c-9fd1f025c34a",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"V1"
],
"time": [
1400511000
],
"range": 49.357830690789584
},
"message_text": "",
"published": "2024-05-23T14:50:07.267599Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T14:50:07.267620Z",
"modified": "2024-05-23T14:50:07.267627Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2414,
"topic": "igwn.gwalert",
"uuid": "5a019df0-1224-4bb8-ac3b-2e3bfb717703",
"title": "S230824cd - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230824cd/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230824cd/view/"
},
"event": {
"far": 2.10279e-05,
"time": "2023-08-24T16:57:30.074Z",
"group": "Burst",
"search": "AllSky",
"area_50": 1191.796976199857,
"area_90": 4600.378292813709,
"duration": 0.01711,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "b49eb67b6cb9a7ddbe5d7aeb04533681",
"classification": {},
"skymap_version": 0,
"central_frequency": 29.980528
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-24T16:59:16Z",
"superevent_id": "S230824cd",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-24T16:59:16.821285Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-24T16:59:16.821306Z",
"modified": "2023-08-24T16:59:16.827776Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2415,
"topic": "igwn.gwalert",
"uuid": "f25adcd4-5fcd-45ee-8e83-668d21ad937a",
"title": "S230824cd - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230824cd/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230824cd/view/"
},
"event": {
"far": 2.10279e-05,
"time": "2023-08-24T16:57:30.074Z",
"group": "Burst",
"search": "AllSky",
"area_50": 1191.796976199857,
"area_90": 4600.378292813709,
"duration": 0.01711,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "b49eb67b6cb9a7ddbe5d7aeb04533681",
"classification": {},
"skymap_version": 0,
"central_frequency": 29.980528
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-24T17:03:49Z",
"superevent_id": "S230824cd",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-24T17:03:50.563323Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-24T17:03:50.563345Z",
"modified": "2023-08-24T17:03:50.567302Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2416,
"topic": "gcn.circular",
"uuid": "be117eb7-a7dd-4eda-91b5-c71d7715114d",
"title": "GRB 230824B: AstroSat CZTI detection",
"submitter": "Hop gcn.circular",
"authors": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"data": {
"date": "23/08/24 17:21:58 GMT",
"from": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"title": "GCN CIRCULAR",
"number": "34538",
"subject": "GRB 230824B: AstroSat CZTI detection"
},
"message_text": "P. K. Navaneeth (IUCAA), G. Waratkar (IITB), A. Vibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (Ashoka University/IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:\n\nAnalysis of AstroSat CZTI data with the CIFT framework (Sharma et al., 2021, JApA, 42, 73) showed the detection of a GRB 230824B which was also detected by GECAM-B (Trigger Num. 214).\n\nThe source was clearly detected in the 20-200 keV energy range. The light curve peaks at 2023-08-24 02:26:50.45 UTC. We see at least two narrow distinct emission episodes. The measured peak count rate associated with the burst is 1044 (+201, -147) counts/s above the background in the combined data of all quadrants, with a total of 704 (+170, -185) counts. The local mean background count rate was 464 (+7, -9) counts/s. Using cumulative rates for the full burst, we measure a T90 of 4.0 (+1.5, -1.4) s.\n\nThe source was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range. The light curve peaks at 2023-08-24 02:26:50.21 UTC. The measured peak count rate associated with the burst is 292 (+71, -46) counts/s above the background in the combined data of all quadrants, with a total of 824 (+293, -358) counts. The local mean background count rate was 1529 (+5, -5) counts/s. We measure a T90 of 5.9 (+3.7, - 3.9) 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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyODk3NzI0LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.So1KZDHCu_DhtxVhS7JsAFwiVN5_Bl-IVrYteSpScNQ\n\n",
"published": "2023-08-24T17:22:13.261804Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-24T17:22:13.261836Z",
"modified": "2023-08-24T17:22:13.271665Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2621,
"topic": "igwn.gwalert",
"uuid": "4fa76547-947e-4ad9-8210-d4257727d390",
"title": "S230831ai - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230831ai/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230831ai/view/"
},
"event": {
"far": 1.520780103197455e-05,
"time": "2023-08-31T07:30:11.536Z",
"group": "CBC",
"search": "AllSky",
"area_50": 1152.769821697538,
"area_90": 5737.411358663538,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.04264138160689884,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "a4eb8805a9e2d4929b2cec630fc02f5b",
"classification": {
"BBH": 0.10266262959497077,
"BNS": 1.312758317427598e-13,
"NSBH": 1.7515302644015882e-10,
"Terrestrial": 0.8973373702297449
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-31T07:30:36Z",
"superevent_id": "S230831ai",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-31T07:30:37.575887Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-31T07:30:37.575905Z",
"modified": "2023-08-31T07:30:37.581642Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2622,
"topic": "igwn.gwalert",
"uuid": "5f2efd9b-5877-4999-8957-fd18da44f939",
"title": "S230831ai - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230831ai/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230831ai/view/"
},
"event": {
"far": 1.520780103197455e-05,
"time": "2023-08-31T07:30:11.536Z",
"group": "CBC",
"search": "AllSky",
"area_50": 1152.769821697538,
"area_90": 5737.411358663538,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.04264138160689884,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "a4eb8805a9e2d4929b2cec630fc02f5b",
"classification": {
"BBH": 0.10266262959497077,
"BNS": 1.312758317427598e-13,
"NSBH": 1.7515302644015882e-10,
"Terrestrial": 0.8973373702297449
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-31T07:35:11Z",
"superevent_id": "S230831ai",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-31T07:35:12.950233Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-31T07:35:12.950253Z",
"modified": "2023-08-31T07:35:12.953810Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6299,
"topic": "gcn.circular",
"uuid": "8d1cdad0-e3c7-4ba6-b8fe-2c34ffc3dd02",
"title": "GRB 240329A: BALROG localization (Fermi Trigger 733441392 / GRB 240329905)",
"submitter": "Hop gcn.circular",
"authors": "Jochen Greiner at MPE <jcgrog@mpe.mpg.de>",
"data": {
"date": "24/03/29 22:04:21 GMT",
"from": "Jochen Greiner at MPE <jcgrog@mpe.mpg.de>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/35994"
},
"title": "GCN CIRCULAR",
"number": "35994",
"subject": "GRB 240329A: BALROG localization (Fermi Trigger 733441392 / GRB 240329905)"
},
"message_text": "T. Preis, B. Biltzinger, J. Burgess & J. Greiner (all MPE Garching) report:\n\nThe public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger\n733441392 at 21:43:07 on 29 March 2024 were automatically fitted for spectrum\nand sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427;\nBerlato et al. 2019, ApJ 873, 60).\n\nThe best-fit position is:\nRA(2000.0) = 248.9 deg\nDecl.(2000.0) = -1.4 deg\nThe 1 sigma statistical error radius is 3.4 deg.\nWe estimate an additional systematic error of 1 deg.\n\nFurther details are available at:\nhttps://grb.mpe.mpg.de/grb/GRB240329905/\n\nThe Healpix map can be downloaded from:\nhttps://grb.mpe.mpg.de/grb/GRB240329905/healpix\n\nThe location parameters are available as JSON at:\nhttps://grb.mpe.mpg.de/grb/GRB240329905/json\n\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35994.",
"published": "2024-03-29T22:04:41.970675Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-03-29T22:04:41.970694Z",
"modified": "2024-03-29T22:04:41.974651Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9239,
"topic": "lvk-users.beccatest",
"uuid": "f51bd8d9-0a88-4932-aa87-14849594df9b",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"V1"
],
"time": [
1400511900
],
"range": 48.760158076750606
},
"message_text": "",
"published": "2024-05-23T15:05:07.194200Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T15:05:07.194221Z",
"modified": "2024-05-23T15:05:07.194229Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 9240,
"topic": "lvk-users.beccatest",
"uuid": "bbf80616-d8ce-4fd7-a4d3-e8b8ef42dd19",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"H1"
],
"time": [
1400512000
],
"range": 149.65282696588486
},
"message_text": "",
"published": "2024-05-23T15:06:38.346850Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-23T15:06:38.346871Z",
"modified": "2024-05-23T15:06:38.346878Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2423,
"topic": "igwn.gwalert",
"uuid": "32683c16-8830-4078-8dfc-0336134cd091",
"title": "S230824co - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230824co/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230824co/view/"
},
"event": {
"far": 1.231066691588073e-05,
"time": "2023-08-24T18:20:52.916Z",
"group": "CBC",
"search": "AllSky",
"area_50": 1017.0140745846317,
"area_90": 3907.751212103194,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.05584942834942835,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "9174c87402c600ebb5d250de674f195c",
"classification": {
"BBH": 0.0008572248164530364,
"BNS": 0.0,
"NSBH": 0.0025153976607894288,
"Terrestrial": 0.9966273775227575
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-24T18:25:57Z",
"superevent_id": "S230824co",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-24T18:25:58.749789Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-24T18:25:58.749810Z",
"modified": "2023-08-24T18:25:58.753364Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2424,
"topic": "gcn.circular",
"uuid": "411afb6b-2c84-4e10-ae95-07b7e3378098",
"title": "GRB 230824A is likely a Galactic Transient: Swift J1727.8-1613",
"submitter": "Hop gcn.circular",
"authors": "Jamie Kennea at Penn State U <jak51@psu.edu>",
"data": {
"date": "23/08/24 18:57:10 GMT",
"from": "Jamie Kennea at Penn State U <jak51@psu.edu>",
"title": "GCN CIRCULAR",
"number": "34540",
"subject": "GRB 230824A is likely a Galactic Transient: Swift J1727.8-1613"
},
"message_text": "Jamie A. Kennea (PSU) reports on behalf of the Swift Team\n\nGRB 230824A (GCN #34537) reported by Swift/BAT, previously triggered INTEGRAL at 12:20UT (Weak trigger #10373,0) 100 mins before the BAT trigger, and continued to trigger INTEGRAL several times after the BAT trigger. Given this, and its location in the Galactic Bulge (l,b = 8.64, 10.241), we now believe this is a likely Galactic Transient and not a GRB.\n\nWe therefore rename this source Swift J1727.8-1613. Observations to confirm the nature of this transient are requested. Swift will not observe this transient until at least August 27, 2023 due to the proximity of the Moon.\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyOTAzNDM1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.P2rhK8WAbcjQVoxZWZhmMljivQxvKHCrK7gjUBORr6w\n\n",
"published": "2023-08-24T18:57:21.788426Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-24T18:57:21.788444Z",
"modified": "2023-08-24T18:57:21.796666Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2425,
"topic": "gcn.circular",
"uuid": "9e8cd963-c275-4347-80e1-61d29993edf7",
"title": "IBAS trigger 10375 is not a GRB",
"submitter": "Hop gcn.circular",
"authors": "Diego Gotz at CEA <diego.gotz@cea.fr>",
"data": {
"date": "23/08/24 19:07:10 GMT",
"from": "Diego Gotz at CEA <diego.gotz@cea.fr>",
"title": "GCN CIRCULAR",
"number": "34541",
"subject": "IBAS trigger 10375 is not a GRB"
},
"message_text": "D. Gotz (CEA Saclay), E. Bozzo, C.Ferrigno, V. Savchenko (Uni Genève) and S. Mereghetti (INAF-IASF) report on behalf of the IBAS Team:\nThe IBAS Trigger 10375 is not due to a GRB, but most likely to a new galactic source, since previous weak triggers from the same direction have been detected starting at 12:20 UT, culminating in a series of more significant triggers between 17.17 and 18:18 UT on August 24th 2023. This conclusion is cohrent with the one presented by Kennea et al. (GCN 34540). \n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyOTA0MDM2LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.RoDMGurOKDDxgc8ONi5InfCWmwE3m53HH_pHPTXckkg\n\n",
"published": "2023-08-24T19:07:21.328888Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-24T19:07:21.328905Z",
"modified": "2023-08-24T19:07:21.333755Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2426,
"topic": "gcn.circular",
"uuid": "c9dd7083-8bdd-4c8a-aa55-c79855ffb56a",
"title": "Trigger 1186982: Swift detection of Swift J1727.8-1613 (AKA GRB 230824A)",
"submitter": "Hop gcn.circular",
"authors": "K.L. Page at U Leicester <klp5@leicester.ac.uk>",
"data": {
"date": "23/08/24 19:09:08 GMT",
"from": "K.L. Page at U Leicester <klp5@leicester.ac.uk>",
"title": "GCN CIRCULAR",
"number": "34542",
"subject": "Trigger 1186982: Swift detection of Swift J1727.8-1613 (AKA GRB 230824A)"
},
"message_text": "\nS. Dichiara (PSU), J. A. Kennea (PSU), K. L. Page (U Leicester),\nT. M. Parsotan (GSFC/UMBC/CRESSTII) and M. A. Williams (PSU) report on\nbehalf of the Neil Gehrels Swift Observatory Team:\n\nAt 18:54:32 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated Swift J1727.8-1613. Due to a Moon observing constraint, Swift\ncannot observe this location until 09:35 UT on 2023 August 27.\n\nWe note this is the 2nd time BAT has triggered on this source,\npreviously named GRB 230824A (GCN #34537), now likely a Galactic\ntransient Swift J1727.8-1613 (GCN #34540)\n\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyOTA0MTUxLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.N9HM2hGV_Ck9RPHmlrKyCpNyR2ibcm5_lCW90xhWq58\n\n",
"published": "2023-08-24T19:09:16.565432Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-24T19:09:16.565449Z",
"modified": "2023-08-24T19:09:16.569383Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2429,
"topic": "igwn.gwalert",
"uuid": "a3530928-a0b0-4f26-b71f-f4caddabab73",
"title": "S230825i - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230825i/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230825i/view/"
},
"event": {
"far": 2.14656e-05,
"time": "2023-08-25T03:45:55.469Z",
"group": "Burst",
"search": "AllSky",
"area_50": 311.7975891959485,
"area_90": 1450.2994189248966,
"duration": 0.003109,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "924337734c6e47aeb4696de93e2345e7",
"classification": {},
"skymap_version": 0,
"central_frequency": 301.254578
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-08-25T03:47:46Z",
"superevent_id": "S230825i",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-25T03:47:48.069871Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-25T03:47:48.069893Z",
"modified": "2023-08-25T03:47:48.076197Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2430,
"topic": "igwn.gwalert",
"uuid": "5f18a610-93b2-44fa-9fdb-19bd7a5f755c",
"title": "S230825i - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230825i/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230825i/view/"
},
"event": {
"far": 2.14656e-05,
"time": "2023-08-25T03:45:55.469Z",
"group": "Burst",
"search": "AllSky",
"area_50": 311.7975891959485,
"area_90": 1450.2994189248966,
"duration": 0.003109,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "924337734c6e47aeb4696de93e2345e7",
"classification": {},
"skymap_version": 0,
"central_frequency": 301.254578
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-08-25T03:52:20Z",
"superevent_id": "S230825i",
"external_coinc": null
},
"message_text": "",
"published": "2023-08-25T03:52:21.797713Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-08-25T03:52:21.797735Z",
"modified": "2023-08-25T03:52:21.801275Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4314,
"topic": "igwn.gwalert",
"uuid": "0b9ca34f-b254-4fce-8f6a-40f697b2d886",
"title": "S231102aq - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S231102aq/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S231102aq/view/"
},
"event": {
"far": 4.64589e-06,
"time": "2023-11-02T12:58:34.485Z",
"group": "Burst",
"search": "AllSky",
"area_50": 616.8808292302077,
"area_90": 2556.4884433132147,
"duration": 0.017625,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "81ce7603f924e05d68030a220fc68893",
"classification": {},
"skymap_version": 0,
"central_frequency": 139.003616
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-11-02T13:01:11Z",
"superevent_id": "S231102aq",
"external_coinc": null
},
"message_text": "",
"published": "2023-11-02T13:01:12.987292Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-11-02T13:01:12.987338Z",
"modified": "2023-11-02T13:01:12.996732Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2427,
"topic": "gcn.circular",
"uuid": "0ae75f4e-ebe1-4896-8169-3be9a4491f9d",
"title": "GRB 230824A: AKO Optical Afterglow Candidate",
"submitter": "Hop gcn.circular",
"authors": "Mohammad Odeh at Al Khatim Observatory M44 <mshodeh@gmail.com>",
"data": {
"date": "23/08/24 19:12:43 GMT",
"from": "Mohammad Odeh at Al Khatim Observatory M44 <mshodeh@gmail.com>",
"title": "GCN CIRCULAR",
"number": "34543",
"subject": "GRB 230824A: AKO Optical Afterglow Candidate"
},
"message_text": "Mohammad Odeh, Osama Ghannam, Anas Mohammad, Khalfan Al-Noaimy, and Sameh\nAl-Ashi, report on behalf of Al-Khatim Observatory (AKO) operated by the\nInternational Astronomical Center in Abu Dhabi, UAE:\n\nWe observed the field of GRB 230824A (Page et al., GCN 34537; Navaneeth et\nal., GCN 34538) with our 0.36m f/7.7 robotic telescope. The observation\nstarted at 18:04 UT on 24 August 2023, 4.1 hours after the trigger.\n\nWe obtained multiple 180-sec exposures in R filter. We detected a bright\nstar with a magnitude of R\u0013.5 at:\nR.A. (J2000): 17:27:43.32\nDec. (J2000): -16:12:19.2\n\nWhich is within the uncertainty radius of the localization determined by\nSwift team (Page et al., GCN 34537), however, our detected object is a\ntransient object (AT 2023qql) which was discovered today at 14:37:22 (UT)\n0.6 hours after the GRB trigger, so more observations are required to\nconfirm this link.\nhttps://www.wis-tns.org/object/2023qql\n\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjkyOTA0MzY1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.fVfJ0aG3Ql9REEmifxEJtg_WwDqk3If4hWioSwBuu0Q\n\n",
"published": "2023-08-24T19:12:50.154122Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-08-24T19:12:50.154138Z",
"modified": "2023-08-24T19:12:50.159147Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1,
"topic": "gcn.circular",
"uuid": "025112ec-3f89-43bb-b257-72a036144315",
"title": "LIGO/Virgo S230518h: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/05/18 18:28:23 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33817",
"subject": "LIGO/Virgo S230518h: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-Amur robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the LIGO/Virgo S230518h errorbox 192 sec after notice time and 10188 sec after trigger time at 2023-05-18 15:48:56 UT, with upper limit up to 17.7 mag. The observations began at zenith distance = 83 deg. The sun altitude is -20.3 deg.\n\nMASTER-SAAO robotic telescope located in South Africa (South African Astronomical Observatory) started inspect of the LIGO/Virgo S230518h errorbox 3191 sec after notice time and 13187 sec after trigger time at 2023-05-18 16:38:55 UT, with upper limit up to 17.7 mag. Observations started at twilight. The observations began at zenith distance = 43 deg. The sun altitude is -11.0 deg.\n\nThe galactic latitude b = -11 deg., longitude l = 223 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011865\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 10278 | 2023-05-18 15:48:56 | MASTER-Amur | (23h 42m 34.05s , +27d 56m 23.2s) | C | 180 | 16.4 |\n 10486 | 2023-05-18 15:52:23 | MASTER-Amur | (23h 36m 00.68s , +26d 00m 33.9s) | C | 180 | 16.5 |\n 10686 | 2023-05-18 15:55:44 | MASTER-Amur | (23h 56m 30.29s , +27d 55m 52.4s) | C | 180 | 15.6 |\n 11213 | 2023-05-18 16:04:31 | MASTER-Amur | (00h 13m 40.72s , +29d 50m 21.9s) | C | 180 | 15.3 |\n 11413 | 2023-05-18 16:07:51 | MASTER-Amur | (23h 55m 58.92s , +31d 42m 40.7s) | C | 180 | 17.0 |\n 11647 | 2023-05-18 16:11:44 | MASTER-Amur | (00h 05m 25.45s , +31d 43m 52.8s) | C | 180 | 16.6 |\n 12170 | 2023-05-18 16:20:28 | MASTER-Amur | (23h 56m 00.17s , +31d 44m 12.4s) | C | 180 | 16.8 |\n 12370 | 2023-05-18 16:23:48 | MASTER-Amur | (00h 05m 18.97s , +31d 43m 14.6s) | C | 180 | 16.9 |\n 12571 | 2023-05-18 16:27:08 | MASTER-Amur | (23h 25m 22.89s , +27d 54m 58.8s) | C | 180 | 17.5 |\n 12770 | 2023-05-18 16:30:28 | MASTER-Amur | (23h 34m 20.58s , +27d 54m 00.4s) | C | 180 | 17.3 |\n 12970 | 2023-05-18 16:33:47 | MASTER-Amur | (23h 18m 57.17s , +26d 01m 19.5s) | C | 180 | 17.5 |\n 13170 | 2023-05-18 16:37:07 | MASTER-Amur | (23h 27m 50.84s , +25d 59m 52.3s) | C | 180 | 17.4 |\n 13278 | 2023-05-18 16:38:55 | MASTER-SAAO | (06h 32m 29.44s , -23d 26m 27.9s) | C | 180 | 17.3 |\n 13278 | 2023-05-18 16:38:55 | MASTER-SAAO | (06h 33m 19.54s , -23d 26m 52.9s) | C | 180 | 17.4 |\n 13370 | 2023-05-18 16:40:27 | MASTER-Amur | (23h 25m 21.09s , +27d 55m 38.3s) | C | 180 | 17.5 |\n 13489 | 2023-05-18 16:42:27 | MASTER-SAAO | (06h 41m 06.20s , -23d 27m 07.7s) | C | 180 | 15.8 |\n 13489 | 2023-05-18 16:42:27 | MASTER-SAAO | (06h 41m 56.73s , -23d 27m 32.5s) | C | 180 | 15.7 |\n 13569 | 2023-05-18 16:43:47 | MASTER-Amur | (23h 34m 18.00s , +27d 54m 49.9s) | C | 180 | 17.5 |\n 13689 | 2023-05-18 16:45:47 | MASTER-SAAO | (06h 26m 56.44s , -21d 32m 00.9s) | C | 180 | 15.9 |\n 13689 | 2023-05-18 16:45:47 | MASTER-SAAO | (06h 27m 46.21s , -21d 32m 26.0s) | C | 180 | 15.9 |\n 13769 | 2023-05-18 16:47:06 | MASTER-Amur | (23h 18m 51.54s , +26d 01m 33.5s) | C | 180 | 17.7 |\n 13901 | 2023-05-18 16:49:18 | MASTER-SAAO | (06h 35m 40.83s , -21d 32m 55.8s) | C | 180 | 17.7 |\n 13901 | 2023-05-18 16:49:18 | MASTER-SAAO | (06h 36m 30.85s , -21d 33m 20.5s) | C | 180 | 17.7 |\n 13968 | 2023-05-18 16:50:26 | MASTER-Amur | (23h 27m 53.06s , +26d 00m 39.5s) | C | 180 | 17.6 |\n 14112 | 2023-05-18 16:52:49 | MASTER-SAAO | (06h 22m 09.91s , -19d 39m 15.3s) | C | 180 | 15.3 |\n 14112 | 2023-05-18 16:52:49 | MASTER-SAAO | (06h 22m 59.36s , -19d 39m 40.9s) | C | 180 | 15.4 |\n 14168 | 2023-05-18 16:53:46 | MASTER-Amur | (23h 26m 09.80s , +20d 17m 47.3s) | C | 180 | 17.5 |\n 14569 | 2023-05-18 17:00:26 | MASTER-Amur | (23h 27m 45.99s , +22d 13m 09.2s) | C | 180 | 17.4 |\n 14769 | 2023-05-18 17:03:46 | MASTER-Amur | (23h 36m 17.86s , +22d 12m 37.0s) | C | 180 | 17.4 |\n 14969 | 2023-05-18 17:07:06 | MASTER-Amur | (23h 26m 03.47s , +20d 19m 20.5s) | C | 180 | 17.4 |\n 15391 | 2023-05-18 17:14:09 | MASTER-Amur | (23h 27m 38.02s , +22d 11m 11.9s) | C | 180 | 17.5 |\n 15591 | 2023-05-18 17:17:28 | MASTER-Amur | (23h 36m 21.64s , +22d 11m 45.9s) | C | 180 | 17.4 |\n 15791 | 2023-05-18 17:20:48 | MASTER-Amur | (23h 30m 53.60s , +24d 05m 24.2s) | C | 180 | 17.6 |\n 15991 | 2023-05-18 17:24:08 | MASTER-Amur | (23h 39m 42.89s , +24d 07m 13.7s) | C | 180 | 17.6 |\n 16190 | 2023-05-18 17:27:28 | MASTER-Amur | (00h 13m 23.27s , +27d 55m 46.2s) | C | 180 | 17.0 |\n 16390 | 2023-05-18 17:30:47 | MASTER-Amur | (00h 22m 34.20s , +27d 54m 50.2s) | C | 180 | 16.8 |\n 16789 | 2023-05-18 17:37:26 | MASTER-Amur | (00h 04m 00.08s , +27d 48m 45.4s) | C | 180 | 16.8 |\n 16989 | 2023-05-18 17:40:46 | MASTER-Amur | (00h 03m 57.56s , +27d 50m 06.1s) | C | 180 | 16.8 |\n 17189 | 2023-05-18 17:44:06 | MASTER-Amur | (00h 03m 57.25s , +27d 48m 30.8s) | C | 180 | 16.7 |\n 17875 | 2023-05-18 17:55:33 | MASTER-Amur | (23h 30m 51.84s , +24d 05m 05.7s) | C | 180 | 16.9 |\n 18075 | 2023-05-18 17:58:52 | MASTER-Amur | (23h 39m 33.41s , +24d 04m 17.8s) | C | 180 | 16.6 |\n 18280 | 2023-05-18 18:02:18 | MASTER-Amur | (00h 13m 26.48s , +27d 53m 29.6s) | C | 180 | 15.9 |\n 18480 | 2023-05-18 18:05:37 | MASTER-Amur | (00h 22m 26.18s , +27d 54m 42.7s) | C | 180 | 15.8 |\n 18679 | 2023-05-18 18:08:57 | MASTER-Amur | (23h 55m 59.05s , +29d 47m 58.1s) | C | 180 | 16.0 |\n 18879 | 2023-05-18 18:12:17 | MASTER-Amur | (00h 05m 53.80s , +29d 47m 33.9s) | C | 180 | 15.8 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-05-18T18:28:33.247908Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-18T18:28:33.247934Z",
"modified": "2023-05-18T18:28:33.252792Z",
"nonlocalizedevents": [
{
"event_id": "S230518h"
}
],
"targets": []
}
]
}