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"next": "https://hermes.lco.global/api/v0/messages/?format=api&limit=100&offset=200&ordering=retracted",
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{
"id": 634,
"topic": "igwn.gwalert",
"uuid": "2d37fd78-e68e-47d8-8784-05f7b6a8823a",
"title": "S230626t - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230626t/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230626t/view/"
},
"event": {
"far": 1.839969081629533e-05,
"time": "2023-06-26T05:02:48.513Z",
"group": "CBC",
"search": "AllSky",
"area_50": 218.11143604925206,
"area_90": 1200.1899126519686,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.4891259650815578,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "d11f350ac411e7bb2164e5fef885ae59",
"classification": {
"BBH": 0.0,
"BNS": 0.031727218446709435,
"NSBH": 0.015607118018778203,
"Terrestrial": 0.9526656635345123
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-06-26T05:03:15Z",
"superevent_id": "S230626t",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-26T05:03:16.312979Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-26T05:03:16.313002Z",
"modified": "2023-06-26T05:03:16.318004Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 64,
"topic": "gcn.circular",
"uuid": "b706823e-0697-455f-a966-f01c5a33f267",
"title": "GRB 230524A: AstroSat CZTI detection",
"submitter": "Hop gcn.circular",
"authors": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"data": {
"date": "23/05/24 13:31:35 GMT",
"from": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"title": "GCN CIRCULAR",
"number": "33868",
"subject": "GRB 230524A: 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 long GRB 230524A which was also detected by Fermi (Fermi GBM Team, GCN Circ. 33864), and AGILE (Panebianco et al., GCN Circ. 33867).\n\nThe source was detected in the 20-200 keV energy range. The light curve peaks at 2023-05-24 06:06:40.50 UTC. The measured peak count rate associated with the burst is 97 (+37, -13) counts/s above the background in the combined data of three quadrants (out of four), with a total of 617 (+249, -270) counts. The local mean background count rate was 324 (+2, -2) counts/s. Using cumulative rates, we measure a T90 of 16 (+6, -10) s.\n\nThe source was clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range. The light curve peaks at 2023-05-24 06:06:40.50 UTC. The measured peak count rate associated with the burst is 448 (+71, -56) counts/s above the background in the combined data of all quadrants, with a total of 5102 (+531, -606) counts. The local mean background count rate was 1398 (+5, -5) counts/s. We measure a T90 of 22 (+10, -4) 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",
"published": "2023-05-24T13:31:44.130819Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-24T13:31:44.130840Z",
"modified": "2023-05-24T13:31:44.139171Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 65,
"topic": "gcn.circular",
"uuid": "4f7467ec-8f46-4ca0-87b6-9b219ca48f2a",
"title": "GRB 230524B: AstroSat CZTI detection",
"submitter": "Hop gcn.circular",
"authors": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"data": {
"date": "23/05/24 13:36:46 GMT",
"from": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"title": "GCN CIRCULAR",
"number": "33869",
"subject": "GRB 230524B: AstroSat CZTI detection"
},
"message_text": "\n\nP 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 probable long GRB 230524B which was also detected by Fermi-GBM (Trigger Number 706599831).\n\nThe source was detected in the 20-200 keV energy range. The light curve peaks at 2023-05-24 05:43:58.50 UTC. The measured peak count rate associated with the burst is 108 (+47, -6) counts/s above the background in the combined data of all quadrants, with a total of 1060 (+469, -248) counts. The local mean background count rate was 409 (+2, -3) counts/s. Using cumulative rates, we measure a T90 of 21 (+12, -8) s.\n\nThe source was also detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range.\n\nCZTI is built by a TIFR-led consortium of institutes across India, including VSSC, URSC, IUCAA, SAC, and PRL. The Indian Space Research Organisation funded, managed, and facilitated the project.\n\nCZTI GRB detections are reported regularly on the payload site at:\nhttp://astrosat.iucaa.in/czti/?q=grb\n\n",
"published": "2023-05-24T13:36:51.743673Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-24T13:36:51.743694Z",
"modified": "2023-05-24T13:36:51.748876Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 85,
"topic": "gcn.circular",
"uuid": "6dd8724c-1748-4908-9eb8-ea654d42dfd8",
"title": "LIGO/Virgo/KAGRA S230520ae: Updated Sky localization",
"submitter": "Hop gcn.circular",
"authors": "Deep Chatterjee at MIT <deep.chatterjee@ligo.org>",
"data": {
"date": "23/05/26 22:04:48 GMT",
"from": "Deep Chatterjee at MIT <deep.chatterjee@ligo.org>",
"title": "GCN CIRCULAR",
"number": "33883",
"subject": "LIGO/Virgo/KAGRA S230520ae: 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 S230520ae (GCN Circular 33838). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.multiorder.fits,0, distributed via GCN Notice, is available for retrieval from the GraceDB event page:\n\nhttps://gracedb.ligo.org/superevents/S230520ae\n\nFor the Bilby.multiorder.fits,0 sky map, the 90% credible region is 1702 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 2014 +/- 663 Mpc (a posteriori mean +/- standard deviation).\n\nFor further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide <https://emfollow.docs.ligo.org/userguide/>.\n\n [1] Ashton et al. ApJS 241, 27 (2019)\n\n",
"published": "2023-05-26T22:04:57.396439Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-26T22:04:57.396459Z",
"modified": "2023-05-26T22:04:57.402921Z",
"nonlocalizedevents": [
{
"event_id": "S230520a"
}
],
"targets": []
},
{
"id": 86,
"topic": "gcn.circular",
"uuid": "52142084-2da3-4524-ac44-4ad8a2f8a013",
"title": "LIGO/Virgo/KAGRA S230518h: Updated Sky localization",
"submitter": "Hop gcn.circular",
"authors": "Deep Chatterjee at MIT <deep.chatterjee@ligo.org>",
"data": {
"date": "23/05/26 22:24:59 GMT",
"from": "Deep Chatterjee at MIT <deep.chatterjee@ligo.org>",
"title": "GCN CIRCULAR",
"number": "33884",
"subject": "LIGO/Virgo/KAGRA S230518h: Updated Sky localization"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:\n\nWe have conducted further offline analysis of the LIGO Hanford Observatory (H1) and LIGO Livingston Observatory (L1) data around the time of the compact binary merger (CBC) candidate S230518h (GCN Circular 33816). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.offline0.multiorder.fits,0, distributed via GCN Notice, is available for retrieval from the GraceDB event page:\n\nhttps://gracedb.ligo.org/superevents/S230518h\n\nFor the Bilby.offline0.multiorder.fits,0 sky map, the 90% credible region is 460 deg2. Marginalized over the whole sky, the a posteriori\nluminosity distance estimate is 204 +/- 57 Mpc (a posteriori mean +/- standard deviation).\n\nFor further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide <https://emfollow.docs.ligo.org/userguide/>.\n\n [1] Ashton et al. ApJS 241, 27 (2019)\n\n",
"published": "2023-05-26T22:25:08.153333Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-26T22:25:08.153355Z",
"modified": "2023-05-26T22:25:08.159523Z",
"nonlocalizedevents": [
{
"event_id": "S230518h"
}
],
"targets": []
},
{
"id": 87,
"topic": "gcn.circular",
"uuid": "3aebc7b2-ab71-46b7-b1b9-6a14ca20521b",
"title": "LIGO/Virgo S230525a: 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": "23/05/27 15:28:22 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33885",
"subject": "LIGO/Virgo S230525a: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the LIGO/Virgo S230525a errorbox 163 sec after notice time and 220 sec after trigger time at 2023-05-25 02:41:57 UT, with upper limit up to 20.2 mag. The observations began at zenith distance = 57 deg. The sun altitude is -34.4 deg.\n\nMASTER-OAFA robotic telescope located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230525a errorbox 1383 sec after notice time and 1440 sec after trigger time at 2023-05-25 03:02:17 UT, with upper limit up to 19.9 mag. The observations began at zenith distance = 59 deg. The sun altitude is -67.6 deg.\n\nThe galactic latitude b = -87 deg., longitude l = 318 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011898\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 241 | 2023-05-25 02:41:57 | MASTER-SAAO | (00h 43m 52.46s , -30d 57m 22.2s) | C | 40 | 18.9 |\n 301 | 2023-05-25 02:41:57 | MASTER-SAAO | (00h 43m 52.51s , -30d 57m 22.1s) | C | 160 | 19.7 | Coadd\n 241 | 2023-05-25 02:41:57 | MASTER-SAAO | (00h 42m 56.31s , -30d 57m 42.5s) | C | 40 | 18.9 |\n 301 | 2023-05-25 02:41:57 | MASTER-SAAO | (00h 42m 56.35s , -30d 57m 42.5s) | C | 160 | 19.7 | Coadd\n 305 | 2023-05-25 02:42:56 | MASTER-SAAO | (00h 43m 49.73s , -30d 55m 53.7s) | C | 50 | 19.0 |\n 305 | 2023-05-25 02:42:56 | MASTER-SAAO | (00h 42m 53.62s , -30d 56m 14.4s) | C | 50 | 18.9 |\n 384 | 2023-05-25 02:44:06 | MASTER-SAAO | (00h 42m 53.71s , -30d 57m 44.2s) | C | 70 | 18.8 |\n 384 | 2023-05-25 02:44:06 | MASTER-SAAO | (00h 43m 49.85s , -30d 57m 23.5s) | C | 70 | 18.9 |\n 494 | 2023-05-25 02:45:46 | MASTER-SAAO | (00h 42m 55.50s , -30d 55m 52.9s) | C | 90 | 19.4 |\n 494 | 2023-05-25 02:45:46 | MASTER-SAAO | (00h 43m 51.61s , -30d 55m 31.0s) | C | 90 | 19.5 |\n 619 | 2023-05-25 02:45:46 | MASTER-SAAO | (00h 43m 51.61s , -30d 55m 30.9s) | C | 340 | 20.2 | Coadd\n 619 | 2023-05-25 02:45:46 | MASTER-SAAO | (00h 42m 55.50s , -30d 55m 52.9s) | C | 340 | 20.0 | Coadd\n 624 | 2023-05-25 02:47:46 | MASTER-SAAO | (00h 42m 50.68s , -30d 56m 48.7s) | C | 110 | 19.5 |\n 624 | 2023-05-25 02:47:46 | MASTER-SAAO | (00h 43m 46.82s , -30d 56m 27.0s) | C | 110 | 19.6 |\n 769 | 2023-05-25 02:49:55 | MASTER-SAAO | (00h 43m 45.72s , -30d 55m 26.6s) | C | 140 | 19.6 |\n 769 | 2023-05-25 02:49:55 | MASTER-SAAO | (00h 42m 49.54s , -30d 55m 49.5s) | C | 140 | 19.6 |\n 990 | 2023-05-25 02:53:17 | MASTER-SAAO | (17h 31m 36.89s , +18d 18m 59.8s) | C | 180 | 18.2 |\n 990 | 2023-05-25 02:53:17 | MASTER-SAAO | (17h 32m 30.08s , +18d 20m 39.0s) | C | 180 | 18.5 |\n 1204 | 2023-05-25 02:56:50 | MASTER-SAAO | (17h 39m 56.49s , +18d 17m 39.9s) | C | 180 | 18.2 |\n 1204 | 2023-05-25 02:56:50 | MASTER-SAAO | (17h 40m 49.81s , +18d 19m 17.4s) | C | 180 | 18.5 |\n 1430 | 2023-05-25 03:00:37 | MASTER-SAAO | (02h 11m 19.03s , -27d 30m 31.0s) | C | 180 | 18.0 |\n 1430 | 2023-05-25 03:00:37 | MASTER-SAAO | (02h 10m 26.37s , -27d 30m 22.3s) | C | 180 | 18.9 |\n 1530 | 2023-05-25 03:02:17 | MASTER-OAFA | (13h 34m 37.77s , +25d 54m 56.5s) | C | 180 | 19.2 |\n 1643 | 2023-05-25 03:04:09 | MASTER-SAAO | (02h 20m 19.94s , -27d 31m 29.7s) | C | 180 | 18.4 |\n 1643 | 2023-05-25 03:04:09 | MASTER-SAAO | (02h 19m 27.44s , -27d 31m 22.2s) | C | 180 | 19.2 |\n 1742 | 2023-05-25 03:05:48 | MASTER-OAFA | (13h 42m 43.76s , +25d 55m 21.5s) | C | 180 | 19.1 |\n 1855 | 2023-05-25 03:07:41 | MASTER-SAAO | (02h 08m 13.23s , -25d 37m 05.0s) | C | 180 | 19.3 |\n 1855 | 2023-05-25 03:07:41 | MASTER-SAAO | (02h 09m 04.81s , -25d 37m 11.9s) | C | 180 | 18.7 |\n 1953 | 2023-05-25 03:09:19 | MASTER-OAFA | (13h 51m 35.39s , +25d 56m 48.2s) | C | 180 | 18.8 |\n 2066 | 2023-05-25 03:11:13 | MASTER-SAAO | (02h 17m 57.73s , -25d 35m 57.5s) | C | 180 | 18.8 |\n 2066 | 2023-05-25 03:11:13 | MASTER-SAAO | (02h 17m 06.29s , -25d 35m 51.1s) | C | 180 | 19.3 |\n 2164 | 2023-05-25 03:12:50 | MASTER-OAFA | (13h 25m 45.46s , +25d 54m 33.6s) | C | 180 | 19.1 |\n 2278 | 2023-05-25 03:14:45 | MASTER-SAAO | (02h 11m 20.44s , -27d 31m 12.4s) | C | 180 | 18.7 |\n 2278 | 2023-05-25 03:14:45 | MASTER-SAAO | (02h 10m 28.01s , -27d 31m 04.9s) | C | 180 | 19.2 |\n 2478 | 2023-05-25 03:18:04 | MASTER-SAAO | (02h 20m 16.68s , -27d 31m 59.1s) | C | 180 | 18.6 |\n 2478 | 2023-05-25 03:18:04 | MASTER-SAAO | (02h 19m 24.27s , -27d 31m 51.4s) | C | 180 | 19.3 |\n 2621 | 2023-05-25 03:20:28 | MASTER-OAFA | (12h 21m 28.53s , +33d 30m 12.9s) | C | 180 | 16.5 |\n 2689 | 2023-05-25 03:21:36 | MASTER-SAAO | (02h 08m 17.55s , -25d 37m 48.6s) | C | 180 | 19.2 |\n 2689 | 2023-05-25 03:21:36 | MASTER-SAAO | (02h 09m 09.24s , -25d 37m 56.8s) | C | 180 | 18.9 |\n 2833 | 2023-05-25 03:24:00 | MASTER-OAFA | (12h 31m 11.58s , +33d 29m 25.8s) | C | 180 | 16.9 |\n 2900 | 2023-05-25 03:25:07 | MASTER-SAAO | (02h 17m 07.57s , -25d 36m 05.4s) | C | 180 | 19.3 |\n 2900 | 2023-05-25 03:25:07 | MASTER-SAAO | (02h 17m 59.38s , -25d 36m 13.1s) | C | 180 | 18.9 |\n 3044 | 2023-05-25 03:27:31 | MASTER-OAFA | (12h 36m 08.96s , +20d 10m 50.0s) | C | 180 | 18.6 |\n 3112 | 2023-05-25 03:28:38 | MASTER-SAAO | (02h 06m 21.25s , -23d 42m 51.3s) | C | 180 | 19.3 |\n 3112 | 2023-05-25 03:28:38 | MASTER-SAAO | (02h 07m 12.49s , -23d 42m 59.6s) | C | 180 | 18.9 |\n 3255 | 2023-05-25 03:31:02 | MASTER-OAFA | (12h 44m 37.31s , +20d 12m 16.3s) | C | 180 | 18.7 |\n 3322 | 2023-05-25 03:32:09 | MASTER-SAAO | (02h 15m 49.92s , -23d 43m 22.8s) | C | 180 | 19.0 |\n 3322 | 2023-05-25 03:32:09 | MASTER-SAAO | (02h 14m 58.77s , -23d 43m 14.0s) | C | 180 | 19.3 |\n 3466 | 2023-05-25 03:34:33 | MASTER-OAFA | (12h 21m 32.49s , +33d 27m 56.3s) | C | 180 | 16.2 |\n 3534 | 2023-05-25 03:35:40 | MASTER-SAAO | (02h 17m 00.60s , -16d 07m 29.4s) | C | 180 | 17.9 |\n 3534 | 2023-05-25 03:35:40 | MASTER-SAAO | (02h 16m 11.96s , -16d 07m 22.9s) | C | 180 | 19.0 |\n 3677 | 2023-05-25 03:38:04 | MASTER-OAFA | (12h 31m 12.04s , +33d 29m 39.5s) | C | 180 | 16.6 |\n 3755 | 2023-05-25 03:39:22 | MASTER-SAAO | (02h 24m 24.94s , -16d 08m 09.9s) | C | 180 | 18.7 |\n 3755 | 2023-05-25 03:39:22 | MASTER-SAAO | (02h 25m 13.51s , -16d 08m 17.5s) | C | 180 | 17.8 |\n 3888 | 2023-05-25 03:41:35 | MASTER-OAFA | (12h 36m 02.18s , +20d 10m 54.2s) | C | 180 | 18.6 |\n 3974 | 2023-05-25 03:43:00 | MASTER-SAAO | (02h 06m 20.69s , -23d 44m 15.3s) | C | 180 | 19.3 |\n 3974 | 2023-05-25 03:43:00 | MASTER-SAAO | (02h 07m 11.92s , -23d 44m 23.4s) | C | 180 | 19.2 |\n 4100 | 2023-05-25 03:45:06 | MASTER-OAFA | (12h 44m 35.10s , +20d 12m 03.0s) | C | 180 | 18.7 |\n 4186 | 2023-05-25 03:46:32 | MASTER-SAAO | (02h 15m 52.05s , -23d 42m 56.5s) | C | 180 | 19.1 |\n 4186 | 2023-05-25 03:46:32 | MASTER-SAAO | (02h 15m 00.85s , -23d 42m 47.9s) | C | 180 | 19.3 |\n 4311 | 2023-05-25 03:48:37 | MASTER-OAFA | (14h 03m 18.48s , +24d 00m 03.2s) | C | 180 | 19.0 |\n 5266 | 2023-05-25 04:04:33 | MASTER-SAAO | (02h 16m 06.18s , -16d 08m 23.9s) | C | 180 | 18.9 |\n 5266 | 2023-05-25 04:04:33 | MASTER-SAAO | (02h 16m 55.75s , -16d 09m 00.6s) | C | 180 | 19.0 |\n 5434 | 2023-05-25 04:07:21 | MASTER-OAFA | (14h 12m 11.39s , +24d 00m 32.7s) | C | 180 | 18.8 |\n 5478 | 2023-05-25 04:08:04 | MASTER-SAAO | (02h 24m 29.19s , -16d 06m 41.4s) | C | 180 | 18.8 |\n 5478 | 2023-05-25 04:08:04 | MASTER-SAAO | (02h 25m 18.71s , -16d 07m 18.1s) | C | 180 | 18.6 |\n 5688 | 2023-05-25 04:11:35 | MASTER-SAAO | (02h 17m 25.73s , -18d 00m 48.4s) | C | 180 | 19.0 |\n 5688 | 2023-05-25 04:11:35 | MASTER-SAAO | (02h 18m 16.09s , -18d 01m 24.3s) | C | 180 | 19.1 |\n 5852 | 2023-05-25 04:14:18 | MASTER-OAFA | (14h 25m 23.79s , +25d 55m 13.8s) | C | 180 | 18.5 |\n 5900 | 2023-05-25 04:15:06 | MASTER-SAAO | (02h 25m 57.75s , -18d 01m 35.3s) | C | 180 | 18.8 |\n 5900 | 2023-05-25 04:15:06 | MASTER-SAAO | (02h 26m 48.12s , -18d 02m 11.2s) | C | 180 | 18.8 |\n 6063 | 2023-05-25 04:17:50 | MASTER-OAFA | (13h 59m 37.93s , +25d 54m 44.7s) | C | 180 | 18.7 |\n 6111 | 2023-05-25 04:18:38 | MASTER-SAAO | (01h 59m 13.02s , -14d 15m 19.5s) | C | 180 | 19.1 |\n 6111 | 2023-05-25 04:18:38 | MASTER-SAAO | (02h 00m 02.68s , -14d 15m 54.8s) | C | 180 | 19.1 |\n 6274 | 2023-05-25 04:21:21 | MASTER-OAFA | (14h 08m 26.92s , +25d 53m 57.8s) | C | 180 | 18.7 |\n 6323 | 2023-05-25 04:22:09 | MASTER-SAAO | (02h 07m 25.60s , -14d 13m 16.4s) | C | 180 | 18.6 |\n 6323 | 2023-05-25 04:22:09 | MASTER-SAAO | (02h 08m 15.27s , -14d 13m 51.2s) | C | 180 | 18.6 |\n 6485 | 2023-05-25 04:24:52 | MASTER-OAFA | (14h 16m 26.88s , +25d 54m 59.9s) | C | 180 | 18.5 |\n 6534 | 2023-05-25 04:25:41 | MASTER-SAAO | (02h 18m 19.40s , -18d 03m 28.0s) | C | 180 | 17.9 |\n 6534 | 2023-05-25 04:25:41 | MASTER-SAAO | (02h 17m 28.63s , -18d 02m 53.1s) | C | 180 | 18.0 |\n 6696 | 2023-05-25 04:28:23 | MASTER-OAFA | (14h 25m 26.72s , +25d 54m 02.1s) | C | 180 | 18.4 |\n 6745 | 2023-05-25 04:29:12 | MASTER-SAAO | (02h 26m 46.18s , -18d 01m 40.3s) | C | 180 | 17.5 |\n 6745 | 2023-05-25 04:29:12 | MASTER-SAAO | (02h 25m 55.48s , -18d 01m 05.6s) | C | 180 | 17.5 |\n 6908 | 2023-05-25 04:31:54 | MASTER-OAFA | (13h 59m 31.04s , +25d 52m 20.9s) | C | 180 | 18.6 |\n 6957 | 2023-05-25 04:32:43 | MASTER-SAAO | (01h 59m 56.13s , -14d 15m 03.2s) | C | 180 | 17.5 |\n 6957 | 2023-05-25 04:32:43 | MASTER-SAAO | (01h 59m 06.14s , -14d 14m 29.1s) | C | 180 | 17.5 |\n 7413 | 2023-05-25 04:40:20 | MASTER-OAFA | (13h 46m 42.34s , +23d 58m 01.7s) | C | 180 | 18.8 |\n 7625 | 2023-05-25 04:43:51 | MASTER-OAFA | (13h 55m 30.53s , +23d 59m 46.2s) | C | 180 | 19.0 |\n 7836 | 2023-05-25 04:47:22 | MASTER-OAFA | (13h 56m 34.28s , +27d 47m 41.6s) | C | 180 | 18.3 |\n 8047 | 2023-05-25 04:50:54 | MASTER-OAFA | (14h 05m 41.65s , +27d 46m 45.7s) | C | 180 | 18.4 |\n 8259 | 2023-05-25 04:54:25 | MASTER-OAFA | (13h 46m 39.93s , +23d 57m 09.0s) | C | 180 | 18.9 |\n 8469 | 2023-05-25 04:57:56 | MASTER-OAFA | (13h 55m 32.43s , +23d 57m 28.7s) | C | 180 | 18.8 |\n 8848 | 2023-05-25 05:04:14 | MASTER-OAFA | (14h 05m 39.55s , +27d 45m 18.6s) | C | 180 | 18.3 |\n 9059 | 2023-05-25 05:07:46 | MASTER-OAFA | (14h 13m 45.65s , +27d 46m 15.7s) | C | 180 | 18.4 |\n 9403 | 2023-05-25 05:13:29 | MASTER-OAFA | (14h 07m 54.50s , +22d 02m 50.9s) | C | 180 | 18.7 |\n 9614 | 2023-05-25 05:17:01 | MASTER-OAFA | (14h 16m 38.26s , +22d 03m 17.7s) | C | 180 | 18.7 |\n 9990 | 2023-05-25 05:23:16 | MASTER-OAFA | (14h 22m 51.67s , +27d 45m 02.4s) | C | 180 | 18.4 |\n 10201 | 2023-05-25 05:26:48 | MASTER-OAFA | (14h 07m 59.53s , +22d 04m 05.9s) | C | 180 | 18.7 |\n 10412 | 2023-05-25 05:30:19 | MASTER-OAFA | (14h 16m 31.76s , +22d 03m 23.0s) | C | 180 | 18.5 |\n 10784 | 2023-05-25 05:36:31 | MASTER-OAFA | (14h 09m 12.65s , +08d 43m 53.9s) | C | 180 | 18.6 |\n 10996 | 2023-05-25 05:40:02 | MASTER-OAFA | (14h 12m 39.16s , +06d 51m 42.6s) | C | 180 | 18.8 |\n 11489 | 2023-05-25 05:48:15 | MASTER-OAFA | (14h 01m 13.70s , +08d 44m 59.5s) | C | 180 | 18.4 |\n 11700 | 2023-05-25 05:51:46 | MASTER-OAFA | (14h 09m 13.31s , +08d 44m 17.3s) | C | 180 | 18.6 |\n 11911 | 2023-05-25 05:55:17 | MASTER-OAFA | (14h 12m 36.61s , +06d 51m 12.9s) | C | 180 | 18.8 |\n 12122 | 2023-05-25 05:58:48 | MASTER-OAFA | (14h 20m 45.87s , +06d 50m 15.1s) | C | 180 | 18.7 |\n 12333 | 2023-05-25 06:02:20 | MASTER-OAFA | (14h 16m 35.91s , +08d 43m 26.2s) | C | 180 | 18.5 |\n 12544 | 2023-05-25 06:05:51 | MASTER-OAFA | (14h 24m 39.46s , +08d 44m 54.7s) | C | 180 | 18.7 |\n 12758 | 2023-05-25 06:09:24 | MASTER-OAFA | (00h 34m 20.55s , -42d 51m 07.8s) | C | 180 | 18.4 |\n 12972 | 2023-05-25 06:12:58 | MASTER-OAFA | (00h 44m 33.61s , -42d 12m 13.5s) | C | 180 | 17.3 |\n 15091 | 2023-05-25 06:48:17 | MASTER-OAFA | (15h 26m 32.57s , -20d 13m 24.4s) | C | 180 | 19.0 |\n 15302 | 2023-05-25 06:51:48 | MASTER-OAFA | (15h 47m 28.65s , -23d 57m 29.0s) | C | 180 | 18.9 |\n 20013 | 2023-05-25 08:10:19 | MASTER-OAFA | (19h 51m 20.60s , -56d 58m 44.9s) | C | 180 | 19.2 |\n 20442 | 2023-05-25 08:17:28 | MASTER-OAFA | (19h 28m 02.35s , -49d 33m 55.8s) | C | 180 | 19.1 |\n 20653 | 2023-05-25 08:21:00 | MASTER-OAFA | (20h 20m 36.04s , -58d 44m 06.1s) | C | 180 | 19.1 |\n 21018 | 2023-05-25 08:27:05 | MASTER-OAFA | (17h 50m 13.51s , -58d 03m 11.3s) | C | 180 | 12.1 |\n 21454 | 2023-05-25 08:34:21 | MASTER-OAFA | (21h 04m 21.63s , -61d 18m 52.7s) | C | 180 | 19.2 |\n 21871 | 2023-05-25 08:41:18 | MASTER-OAFA | (21h 50m 49.44s , -68d 17m 52.1s) | C | 180 | 19.1 |\n 22083 | 2023-05-25 08:44:49 | MASTER-OAFA | (22h 43m 57.70s , -77d 52m 52.1s) | C | 180 | 19.2 |\n 22294 | 2023-05-25 08:48:20 | MASTER-OAFA | (22h 44m 28.42s , -85d 16m 10.6s) | C | 180 | 19.0 |\n 22505 | 2023-05-25 08:51:52 | MASTER-OAFA | (22h 40m 38.85s , -85d 03m 07.4s) | C | 180 | 18.7 |\n 23471 | 2023-05-25 09:07:57 | MASTER-OAFA | (02h 26m 21.41s , -18d 07m 31.3s) | C | 180 | 17.9 |\n 23858 | 2023-05-25 09:14:24 | MASTER-OAFA | (21h 17m 32.92s , +00d 04m 04.7s) | C | 180 | 19.3 |\n 24070 | 2023-05-25 09:17:56 | MASTER-OAFA | (02h 24m 58.98s , -16d 15m 14.3s) | C | 180 | 17.6 |\n 24281 | 2023-05-25 09:21:27 | MASTER-OAFA | (21h 17m 35.75s , +00d 05m 43.6s) | C | 180 | 19.3 |\n 24461 | 2023-05-25 09:21:27 | MASTER-OAFA | (21h 17m 35.74s , +00d 05m 43.5s) | C | 540 | 19.9 | Coadd\n 24644 | 2023-05-25 09:27:31 | MASTER-OAFA | (02h 18m 06.21s , -18d 07m 14.8s) | C | 180 | 17.7 |\n 24856 | 2023-05-25 09:31:02 | MASTER-OAFA | (02h 26m 23.27s , -18d 07m 51.9s) | C | 180 | 17.6 |\n 25660 | 2023-05-25 09:44:27 | MASTER-OAFA | (21h 17m 31.31s , +00d 03m 12.7s) | C | 180 | 19.2 |\n 25804 | 2023-05-25 09:48:20 | MASTER-OAFA | (00h 03m 19.98s , -00d 08m 42.6s) | C | -1 | 14.0 |\n 25868 | 2023-05-25 09:49:25 | MASTER-OAFA | (00h 03m 15.90s , -00d 06m 48.1s) | C | -1 | 17.1 |\n 25991 | 2023-05-25 09:49:57 | MASTER-OAFA | (21h 17m 37.54s , +00d 04m 01.6s) | C | 180 | 19.2 |\n 26133 | 2023-05-25 09:53:50 | MASTER-OAFA | (00h 03m 20.08s , -00d 06m 54.0s) | C | -1 | 14.9 |\n 26289 | 2023-05-25 09:54:55 | MASTER-OAFA | (21h 17m 32.66s , +00d 03m 55.0s) | C | 180 | 17.5 |\n 26262 | 2023-05-25 09:55:59 | MASTER-OAFA | (23h 55m 15.83s , -00d 08m 56.4s) | C | -1 | 17.7 |\n 26327 | 2023-05-25 09:57:03 | MASTER-OAFA | (23h 55m 19.45s , -00d 07m 12.9s) | C | -1 | 17.7 |\n 26392 | 2023-05-25 09:58:08 | MASTER-OAFA | (23h 55m 22.74s , -00d 07m 25.3s) | C | -1 | 17.6 |\n 26456 | 2023-05-25 09:59:13 | MASTER-OAFA | (23h 55m 23.57s , -00d 07m 58.4s) | C | -1 | 17.7 |\n 26612 | 2023-05-25 10:00:18 | MASTER-OAFA | (21h 17m 39.75s , +00d 02m 54.4s) | C | 180 | 17.5 |\n 26589 | 2023-05-25 10:01:25 | MASTER-OAFA | (00h 03m 23.33s , -00d 07m 01.9s) | C | -1 | 17.6 |\n 26711 | 2023-05-25 10:01:58 | MASTER-OAFA | (02h 00m 21.16s , -14d 14m 35.0s) | C | 180 | 17.0 |\n 26923 | 2023-05-25 10:05:29 | MASTER-OAFA | (02h 08m 39.75s , -14d 15m 53.4s) | C | 180 | 16.5 |\n 27135 | 2023-05-25 10:09:01 | MASTER-OAFA | (01h 59m 42.72s , -12d 20m 56.3s) | C | 180 | 17.5 |\n 27278 | 2023-05-25 10:12:55 | MASTER-OAFA | (00h 03m 20.32s , -00d 08m 49.6s) | C | -1 | 15.2 |\n 27342 | 2023-05-25 10:13:58 | MASTER-OAFA | (00h 03m 17.79s , -00d 08m 00.3s) | C | -1 | 17.5 |\n 27404 | 2023-05-25 10:15:01 | MASTER-OAFA | (00h 03m 23.58s , -00d 07m 58.6s) | C | -1 | 17.4 |\n 27469 | 2023-05-25 10:16:05 | MASTER-OAFA | (00h 03m 23.05s , -00d 08m 53.1s) | C | -1 | 16.9 |\n 27534 | 2023-05-25 10:17:10 | MASTER-OAFA | (00h 03m 20.02s , -00d 08m 49.9s) | C | -1 | 16.9 |\n 28122 | 2023-05-25 10:25:29 | MASTER-OAFA | (02h 08m 50.56s , -14d 12m 37.1s) | C | 180 | 16.5 |\n 28480 | 2023-05-25 10:32:57 | MASTER-OAFA | (00h 03m 17.26s , -00d 08m 16.0s) | C | -1 | 15.5 |\n 28546 | 2023-05-25 10:34:02 | MASTER-OAFA | (00h 03m 23.06s , -00d 08m 13.6s) | C | -1 | 15.9 |\n 28611 | 2023-05-25 10:35:07 | MASTER-OAFA | (00h 03m 23.23s , -00d 09m 07.4s) | C | -1 | 15.8 |\n 29048 | 2023-05-25 10:42:24 | MASTER-OAFA | (00h 03m 17.87s , -00d 07m 22.7s) | C | -1 | 14.4 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-05-27T15:28:35.128809Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-27T15:28:35.128841Z",
"modified": "2023-05-27T15:28:35.140900Z",
"nonlocalizedevents": [
{
"event_id": "S230525a"
}
],
"targets": []
},
{
"id": 1334,
"topic": "gcn.circular",
"uuid": "e9f2fe89-6540-4773-9ea3-735eca02845c",
"title": "Fermi Gamma-ray Burst Monitor trigger 711329677/230717982 is not a GRB",
"submitter": "Hop gcn.circular",
"authors": "Cori Fletcher at USRA <cfletcher@usra.edu>",
"data": {
"date": "23/07/18 02:43:26 GMT",
"from": "Cori Fletcher at USRA <cfletcher@usra.edu>",
"title": "GCN CIRCULAR",
"number": "34224",
"subject": "Fermi Gamma-ray Burst Monitor trigger 711329677/230717982 is not a GRB"
},
"message_text": "C. Fletcher (USRA) reports on behalf of the Fermi Gamma-ray Burst Monitor Team:\n\n\"The Fermi Gamma-ray Burst Monitor (GBM) trigger 711329677/230717982 at 23:34:32.98 UT\non 17 July 2023, tentatively classified as a GRB, is in fact not due\nto a GRB. This trigger is likely due to a Solar Flare.\"\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg5NjQ4MjExLCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.0gWNUTSpMcg203R6eIhoiBab8FzgTpyxfg9elOkR2KQ\n\n",
"published": "2023-07-18T02:43:36.394032Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-07-18T02:43:36.394063Z",
"modified": "2023-07-18T02:43:36.404512Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 7622,
"topic": "lvk-users.beccatest",
"uuid": "a0f8918b-d390-4050-80e3-10afa4c89d24",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"L1"
],
"time": [
1400452600
],
"range": 165.36288886882792
},
"message_text": "",
"published": "2024-05-22T22:36:40.664965Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-22T22:36:40.664986Z",
"modified": "2024-05-22T22:36:40.664995Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 66,
"topic": "gcn.circular",
"uuid": "986f91b4-2f3a-44e2-bbd2-365cc93c6642",
"title": "IceCube-230524A - IceCube observation of a high-energy neutrino candidate track-like event",
"submitter": "Hop gcn.circular",
"authors": "Dr. Massimiliano Lincetto at Ruhr-Universitaet Bochum <lincetto@astro.rub.de>",
"data": {
"date": "23/05/24 13:50:23 GMT",
"from": "Dr. Massimiliano Lincetto at Ruhr-Universitaet Bochum <lincetto@astro.rub.de>",
"title": "GCN CIRCULAR",
"number": "33870",
"subject": "IceCube-230524A - IceCube observation of a high-energy neutrino candidate track-like event"
},
"message_text": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nOn 2023-05-24 at 11:09:36.24 UT IceCube detected a track-like event\nwith a moderate probability of being of astrophysical origin. \nThe event was selected by the ICECUBE_Astrotrack_Bronze alert stream.\nThe average astrophysical neutrino purity Bronze alerts is 30%.\n\nThis alert has an estimated false alarm rate of 4.25 events per year\ndue to atmospheric backgrounds. The IceCube detector was in a normal\noperating state at the time of detection.\n\nAfter the initial automated alert\n(https://gcn.gsfc.nasa.gov/notices_amon_g_b/137971_11526243.amon), more\nsophisticated reconstruction algorithms have been applied offline, with\nthe direction refined to:\n\nDate: 2023-05-24\nTime: 11:09:36.24 UT\nRA: 318.43 (+3.12 / -2.59 deg 90% PSF containment) J2000\nDec: +2.84 (+2.55 / -2.43 deg 90% PSF containment) J2000\n\nWe encourage follow-up by ground and space-based instruments to help\nidentify a possible astrophysical source for the candidate neutrino.\n\nTwo gamma-ray sources listed in the 4FGL Fermi-LAT catalog are located\nwithin the 90% uncertainty region. The sources are 4FGL J2110.3+0404\nand 4FGL J2109.6+0440 located 1.50 and 2.10 deg away from the best-fit\nposition, respectively.\n\nThe IceCube Neutrino Observatory is a cubic-kilometer neutrino detector\noperating at the geographic South Pole, Antarctica.\n\nThe IceCube realtime alert point of contact can be reached at\nroc@icecube.wisc.edu\n\n\n",
"published": "2023-05-24T13:50:32.663081Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-24T13:50:32.663113Z",
"modified": "2023-05-24T13:50:32.668879Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 67,
"topic": "hermes.message",
"uuid": "94edb858-d373-40a0-a094-44831a8b292c",
"title": "S230524b at 2023-05-24T06:13:20.000",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "S230524b at 2023-05-24T06:13:20.000\n\n\nSPI-ACS excesses:\nat T0+14.61 FAP = 0.472\nat T0+26.74 FAP = 0.648",
"published": "2023-05-24T14:28:10.352176Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-05-24T14:28:10.352197Z",
"modified": "2023-05-24T14:28:10.358752Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 68,
"topic": "igwn.gwalert",
"uuid": "94865149-f604-45f4-94ce-35eadd7d701d",
"title": "S230524x - EARLYWARNING",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230524x/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230524x/view/"
},
"event": {
"far": 7.224443905955801e-08,
"time": "2023-05-24T20:22:41.837Z",
"group": "CBC",
"search": "EarlyWarning",
"area_50": 2.148591731740587,
"area_90": 2.148591731740587,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.0,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "b092bb8f547568afcec90a248bcd943d",
"classification": {
"BBH": 0.0,
"BNS": 0.7540149362918832,
"NSBH": 0.0,
"Terrestrial": 0.24598506370811693
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "EARLYWARNING",
"sequence_num": 1,
"time_created": "2023-05-24T20:22:33Z",
"superevent_id": "S230524x",
"external_coinc": null
},
"message_text": "",
"published": "2023-05-24T20:22:33.931700Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-05-24T20:22:33.931738Z",
"modified": "2023-05-24T20:22:33.940977Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 69,
"topic": "igwn.gwalert",
"uuid": "6169e96b-dbf8-48ef-be52-faaf7e2b0772",
"title": "S230524x - RETRACTION",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"gracedb": "https://gracedb.ligo.org/superevents/S230524x/view/"
},
"event": null,
"alert_type": "RETRACTION",
"sequence_num": 2,
"time_created": "2023-05-24T20:37:50Z",
"superevent_id": "S230524x",
"external_coinc": null
},
"message_text": "",
"published": "2023-05-24T20:37:50.911876Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-05-24T20:37:50.911900Z",
"modified": "2023-05-24T20:37:50.916824Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 70,
"topic": "gcn.circular",
"uuid": "02a0bb93-8f9b-473a-a915-974c0595d78a",
"title": "LIGO/Virgo/KAGRA S230524x: Retraction of GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "J. L. Wright at Australian National University <jennifer.wright@anu.edu.au>",
"data": {
"date": "23/05/24 20:50:40 GMT",
"from": "J. L. Wright at Australian National University <jennifer.wright@anu.edu.au>",
"title": "GCN CIRCULAR",
"number": "33871",
"subject": "LIGO/Virgo/KAGRA S230524x: Retraction of GW compact binary merger candidate"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:\n\nThe trigger S230524x is no longer considered to be a candidate of interest. This candidate included at least one detection prior to the merger time but no significant detections that included the merger, which indicates this candidate is likely a noise transient.\n\n",
"published": "2023-05-24T20:50:52.802408Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-24T20:50:52.802427Z",
"modified": "2023-05-24T20:50:52.807077Z",
"nonlocalizedevents": [
{
"event_id": "S230524x"
}
],
"targets": []
},
{
"id": 71,
"topic": "igwn.gwalert",
"uuid": "53d075db-cc2b-4a56-93a4-92272f61171f",
"title": "S230525a - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230525a/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230525a/view/"
},
"event": {
"far": 7.513615903997673e-07,
"time": "2023-05-25T02:38:17.863Z",
"group": "CBC",
"search": "AllSky",
"area_50": 4.297183463481174,
"area_90": 8.594366926962348,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.008222222222222221,
"HasRemnant": 0.0
},
"instruments": [
"L1"
],
"significant": false,
"skymap_hash": "8e52a21d04aa9a9df24fc1c0bb9bbfce",
"classification": {
"BBH": 0.723511627022613,
"BNS": 3.7233203006183304e-25,
"NSBH": 2.5129811825348016e-23,
"Terrestrial": 0.27648837297738704
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-05-25T02:38:56Z",
"superevent_id": "S230525a",
"external_coinc": null
},
"message_text": "",
"published": "2023-05-25T02:38:57.761574Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-05-25T02:38:57.761599Z",
"modified": "2023-05-25T02:38:57.767152Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 72,
"topic": "igwn.gwalert",
"uuid": "d37af35b-7220-4689-b521-45230171ebd1",
"title": "S230525a - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230525a/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230525a/view/"
},
"event": {
"far": 7.513615903997673e-07,
"time": "2023-05-25T02:38:17.863Z",
"group": "CBC",
"search": "AllSky",
"area_50": 4.297183463481174,
"area_90": 8.594366926962348,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.008222222222222221,
"HasRemnant": 0.0
},
"instruments": [
"L1"
],
"significant": false,
"skymap_hash": "8e52a21d04aa9a9df24fc1c0bb9bbfce",
"classification": {
"BBH": 0.723511627022613,
"BNS": 3.7233203006183304e-25,
"NSBH": 2.5129811825348016e-23,
"Terrestrial": 0.27648837297738704
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-05-25T02:43:31Z",
"superevent_id": "S230525a",
"external_coinc": null
},
"message_text": "",
"published": "2023-05-25T02:43:32.442209Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-05-25T02:43:32.442242Z",
"modified": "2023-05-25T02:43:32.447105Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 73,
"topic": "hermes.message",
"uuid": "ae16f3f1-f3fb-469f-86b0-320e227d5161",
"title": "INTEGRAL follow-up of S230525a",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230525a at 2023-05-25T02:38:17.000\n\n\nSPI-ACS excesses:\nat T0+-7.03 FAP = 0.159\nat T0+105.02 FAP = 0.809",
"published": "2023-05-25T04:19:58.209095Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-05-25T04:19:58.209117Z",
"modified": "2023-05-25T04:19:58.214606Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 91,
"topic": "igwn.gwalert",
"uuid": "e5745508-118b-4d82-ab7e-121535a14533",
"title": "S230527ch - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230527ch/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230527ch/view/"
},
"event": {
"far": 2.53734e-06,
"time": "2023-05-27T18:10:28.684Z",
"group": "Burst",
"search": "AllSky",
"duration": 0.050814,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "1e20793bf8fa5f0e0dafaa4e580d081c",
"classification": {},
"skymap_version": 0,
"central_frequency": 1074.69812
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-05-27T18:13:37Z",
"superevent_id": "S230527ch",
"external_coinc": null
},
"message_text": "",
"published": "2023-05-27T18:13:38.495834Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-05-27T18:13:38.495859Z",
"modified": "2023-05-27T18:13:38.501588Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 74,
"topic": "gcn.circular",
"uuid": "74651575-411e-411c-935b-1e2d2f6f99dd",
"title": "LIGO/Virgo/KAGRA S230518h: No transient candidates in CALET observations",
"submitter": "Hop gcn.circular",
"authors": "Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>",
"data": {
"date": "23/05/25 06:39:10 GMT",
"from": "Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>",
"title": "GCN CIRCULAR",
"number": "33872",
"subject": "LIGO/Virgo/KAGRA S230518h: No transient candidates in CALET observations"
},
"message_text": "A. Yoshida, T. Sakamoto, S. Sugita (AGU), Y. Kawakubo (LSU),\nK. Yamaoka (Nagoya U), S. Nakahira (JAXA), Y. Asaoka (ICRR),\nS. Torii, Y. Akaike, K. Kobayashi (Waseda U), Y. Shimizu,\nT. Tamura (Kanagawa U), N. Cannady (GSFC/UMBC),\nM. L. Cherry (LSU), S. Ricciarini (U of Florence),\nP. S. Marrocchesi (U of Siena),\nand the CALET collaboration:\n\nThe CALET Gamma-ray Burst Monitor (CGBM) was operating at the trigger\ntime of S230518h T0 = 2023-05-18T12:59:08 UT (GCN33813,33816).\n\nNo CGBM onboard trigger occurred around the event time. Based on the\nupdate sky map, the summed probabilities inside the CGBM HXM (7 - 3000 keV)\nand SGM (40 keV - 28 MeV) fields of view\nare 0 % and 65 %, respectively (and 76 % credible regions of the\nupdate sky map was above the horizon). The HXM and SGM fields of\nview were centered at RA = 152 deg, Dec = +50 deg and RA = 161\ndeg, Dec = +42 deg at T0, respectively.\n\nBased on the analysis of the light curve data with 0.125 sec time\nresolution from T0-60 sec to T0+60 sec, we found no significant\nexcess (> 7 sigmas) around the trigger time in either the HXM or the SGM data.\n\nThe preliminary CGBM analysis is available at\n\nhttp://cgbm.calet.jp/cgbm_trigger/O4/S230518h\n\nThe CALET Calorimeter (CAL) was operating in the high energy trigger\nmode at the trigger time of S230518h. Using the CAL data, we searched\nfor gamma-ray events in the 10-100 GeV band from -60 sec\nto +60 sec from the GW trigger time and found no candidates. There\nwas no significant overlap with the LVK high probability localization\nregion at T0+-60 sec. The CAL FOV was centered at RA = 161 deg,\nDec= +42 deg at T0.\n\nThe preliminary CGBM analysis for O4 events can be found here:\nhttp://cgbm.calet.jp/cgbm_trigger/O4\n\n",
"published": "2023-05-25T06:39:19.783206Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-25T06:39:19.783226Z",
"modified": "2023-05-25T06:39:19.791474Z",
"nonlocalizedevents": [
{
"event_id": "S230518h"
}
],
"targets": []
},
{
"id": 75,
"topic": "gcn.circular",
"uuid": "2acfe7eb-e36d-49b4-8014-98f1ff7c186c",
"title": "IceCube Alert 230524.47: 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": "23/05/25 07:13:25 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33873",
"subject": "IceCube Alert 230524.47: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the IceCube Alert 230524.47 (trigger No 11526243,21h 16m 02.16s , +02d 57m 32.4s, R=1.12) errorbox 46133 sec after notice time and 46181 sec after trigger time at 2023-05-24 23:59:17 UT, with upper limit up to 20.1 mag. The observations began at zenith distance = 62 deg. The sun altitude is -68.2 deg.\n\nThe galactic latitude b = -30 deg., longitude l = 55 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"19004\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 46271 | 2023-05-24 23:59:17 | MASTER-SAAO | (21h 05m 12.01s , +02d 17m 31.9s) | C | 180 | 19.0 |\n 46451 | 2023-05-24 23:59:17 | MASTER-SAAO | (21h 05m 12.01s , +02d 17m 31.9s) | C | 540 | 20.0 | Coadd\n 46271 | 2023-05-24 23:59:17 | MASTER-SAAO | (21h 04m 24.13s , +02d 17m 57.8s) | C | 180 | 19.1 |\n 46451 | 2023-05-24 23:59:17 | MASTER-SAAO | (21h 04m 24.13s , +02d 17m 57.8s) | C | 540 | 20.0 | Coadd\n 46492 | 2023-05-25 00:02:57 | MASTER-SAAO | (21h 05m 09.15s , +02d 18m 40.8s) | C | 180 | 19.6 |\n 46492 | 2023-05-25 00:02:57 | MASTER-SAAO | (21h 04m 21.21s , +02d 19m 04.9s) | C | 180 | 19.5 |\n 46697 | 2023-05-25 00:06:23 | MASTER-SAAO | (21h 05m 09.15s , +02d 17m 39.5s) | C | 180 | 19.5 |\n 46697 | 2023-05-25 00:06:23 | MASTER-SAAO | (21h 04m 21.15s , +02d 18m 03.5s) | C | 180 | 19.3 |\n 46909 | 2023-05-25 00:09:54 | MASTER-SAAO | (21h 16m 06.41s , +04d 49m 49.5s) | C | 180 | 19.5 |\n 47089 | 2023-05-25 00:09:54 | MASTER-SAAO | (21h 16m 06.43s , +04d 49m 49.4s) | C | 540 | 20.1 | Coadd\n 46909 | 2023-05-25 00:09:54 | MASTER-SAAO | (21h 15m 18.55s , +04d 50m 16.3s) | C | 180 | 19.4 |\n 47089 | 2023-05-25 00:09:54 | MASTER-SAAO | (21h 15m 18.57s , +04d 50m 16.3s) | C | 540 | 19.9 | Coadd\n 47119 | 2023-05-25 00:13:25 | MASTER-SAAO | (21h 15m 58.74s , +04d 49m 13.0s) | C | 180 | 19.5 |\n 47119 | 2023-05-25 00:13:25 | MASTER-SAAO | (21h 15m 10.93s , +04d 49m 38.4s) | C | 180 | 19.4 |\n 47330 | 2023-05-25 00:16:56 | MASTER-SAAO | (21h 15m 59.23s , +04d 50m 11.0s) | C | 180 | 19.2 |\n 47330 | 2023-05-25 00:16:56 | MASTER-SAAO | (21h 15m 11.27s , +04d 50m 37.0s) | C | 180 | 19.0 |\n 47542 | 2023-05-25 00:20:27 | MASTER-SAAO | (21h 16m 59.92s , -00d 00m 32.3s) | C | 180 | 19.5 |\n 47722 | 2023-05-25 00:20:27 | MASTER-SAAO | (21h 16m 59.93s , -00d 00m 32.3s) | C | 540 | 20.1 | Coadd\n 47542 | 2023-05-25 00:20:27 | MASTER-SAAO | (21h 16m 11.91s , -00d 00m 06.3s) | C | 180 | 19.4 |\n 47722 | 2023-05-25 00:20:27 | MASTER-SAAO | (21h 16m 11.92s , -00d 00m 06.3s) | C | 540 | 20.0 | Coadd\n 47753 | 2023-05-25 00:23:59 | MASTER-SAAO | (21h 16m 06.06s , -00d 01m 06.7s) | C | 180 | 19.4 |\n 47753 | 2023-05-25 00:23:59 | MASTER-SAAO | (21h 16m 54.07s , -00d 01m 33.0s) | C | 180 | 19.5 |\n 47965 | 2023-05-25 00:27:31 | MASTER-SAAO | (21h 17m 00.90s , -00d 01m 26.3s) | C | 180 | 19.4 |\n 47965 | 2023-05-25 00:27:31 | MASTER-SAAO | (21h 16m 12.82s , -00d 00m 59.8s) | C | 180 | 19.2 |\n 48816 | 2023-05-25 00:41:42 | MASTER-SAAO | (21h 24m 08.69s , +04d 27m 32.1s) | C | 180 | 19.2 |\n 48996 | 2023-05-25 00:41:42 | MASTER-SAAO | (21h 24m 08.67s , +04d 27m 32.1s) | C | 540 | 20.0 | Coadd\n 48816 | 2023-05-25 00:41:42 | MASTER-SAAO | (21h 23m 20.63s , +04d 28m 00.9s) | C | 180 | 19.2 |\n 48996 | 2023-05-25 00:41:42 | MASTER-SAAO | (21h 23m 20.62s , +04d 28m 00.9s) | C | 540 | 19.9 | Coadd\n 49029 | 2023-05-25 00:45:15 | MASTER-SAAO | (21h 24m 08.32s , +04d 28m 32.4s) | C | 180 | 19.3 |\n 49029 | 2023-05-25 00:45:15 | MASTER-SAAO | (21h 23m 20.18s , +04d 29m 01.1s) | C | 180 | 19.2 |\n 49241 | 2023-05-25 00:48:47 | MASTER-SAAO | (21h 24m 14.10s , +04d 27m 32.3s) | C | 180 | 19.1 |\n 49241 | 2023-05-25 00:48:47 | MASTER-SAAO | (21h 23m 25.87s , +04d 28m 01.6s) | C | 180 | 19.1 |\n 49451 | 2023-05-25 00:52:17 | MASTER-SAAO | (21h 22m 22.89s , +05d 20m 21.5s) | C | 180 | 19.4 |\n 49631 | 2023-05-25 00:52:17 | MASTER-SAAO | (21h 22m 22.90s , +05d 20m 21.5s) | C | 540 | 20.1 | Coadd\n 49451 | 2023-05-25 00:52:17 | MASTER-SAAO | (21h 21m 34.55s , +05d 20m 51.0s) | C | 180 | 19.3 |\n 49631 | 2023-05-25 00:52:17 | MASTER-SAAO | (21h 21m 34.56s , +05d 20m 51.0s) | C | 540 | 20.0 | Coadd\n 49662 | 2023-05-25 00:55:48 | MASTER-SAAO | (21h 22m 30.22s , +05d 20m 46.5s) | C | 180 | 19.1 |\n 49662 | 2023-05-25 00:55:48 | MASTER-SAAO | (21h 21m 41.79s , +05d 21m 15.9s) | C | 180 | 19.0 |\n 49875 | 2023-05-25 00:59:21 | MASTER-SAAO | (21h 22m 26.62s , +05d 22m 15.4s) | C | 180 | 19.4 |\n 49875 | 2023-05-25 00:59:21 | MASTER-SAAO | (21h 21m 38.15s , +05d 22m 45.3s) | C | 180 | 19.3 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-05-25T07:13:35.901396Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-25T07:13:35.901417Z",
"modified": "2023-05-25T07:13:35.906786Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 76,
"topic": "gcn.circular",
"uuid": "d6ad08d8-5bff-4a1e-8057-7c2e9d56830e",
"title": "GRB 230524A: Fermi GBM Observation",
"submitter": "Hop gcn.circular",
"authors": "Andreas von Kienlin at MPE <azk@mpe.mpg.de>",
"data": {
"date": "23/05/25 10:00:14 GMT",
"from": "Andreas von Kienlin at MPE <azk@mpe.mpg.de>",
"title": "GCN CIRCULAR",
"number": "33874",
"subject": "GRB 230524A: Fermi GBM Observation"
},
"message_text": "A. von Kienlin (MPE) and C. Meegan (UAH) report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"At 06:06:35 UT on 24 May 2023, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 230524A (trigger 706601200/230524255),\nwhich was also detected by AGILE (Panebianco et al. 2023, GCN 33867)\nand AstroSAT/CZTI (Navaneeth et al. 2022, GCN 33868).\nThe Fermi GBM Final Real-time Localization was reported in GCN 33864.\n\nThe GBM light curve consists of a single emission with a duration (T90)\nof about 35 s (50-300 keV). The time-averaged spectrum\nfrom T0-2.0 to T0+36.9 s is best fit by\na power law function with an exponential high-energy cutoff.\nThe power law index is -0.99 +/- 0.04 and the cutoff energy,\nparameterized as Epeak, is 1632 +/- 415 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(1.58 +/- 0.05)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0-2 s in the 10-1000 keV band is 2.7 +/- 0.2 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog:\nhttps://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html\n\nFor Fermi GBM data and info, please visit the official Fermi GBM Support\nPage:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"\n\n",
"published": "2023-05-25T10:00:23.410177Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-25T10:00:23.410200Z",
"modified": "2023-05-25T10:00:23.417445Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 567,
"topic": "gcn.circular",
"uuid": "9f439fdc-3e7d-44d3-8b93-172256a4fd38",
"title": "GRB 230623B: Swift/BAT-GUANO detection of a long burst outside the coded FOVÂ ",
"submitter": "Hop gcn.circular",
"authors": "Samuele Ronchini at PSU <sjs8171@psu.edu>",
"data": {
"date": "23/06/24 14:51:09 GMT",
"from": "Samuele Ronchini at PSU <sjs8171@psu.edu>",
"title": "GCN CIRCULAR",
"number": "34076",
"subject": "GRB 230623B: Swift/BAT-GUANO detection of a long burst outside the coded FOVÂ "
},
"message_text": "Samuele Ronchini (PSU), James DeLaunay (U Alabama), Aaron Tohuvavohu (U Toronto), Gayathri Raman (PSU), Jamie A. Kennea (PSU), Tyler Parsotan (NASA GSFC) report: \n\nSwift/BAT did not localize GRB 230623B onboard (T0: 2023-06-23T21:22:34.5 UTC, GECAM trig 195).\n\nThe GECAM notice, distributed in near real-time, triggered the Swift Mission Operations Center operated Gamma-ray Urgent Archiver for Novel Opportunities (GUANO; Tohuvavohu et al. 2020, ApJ, 900, 1). \n\nUpon trigger by this notice, GUANO sent a command to the Swift Burst Alert Telescope (BAT) to save 200 seconds of BAT event-mode data from [-50,+150] seconds around the time of the burst. All the requested event mode data was delivered to the ground. \n\nThe BAT likelihood search, NITRATES (DeLaunay + Tohuvavohu 2022, ApJ, 941, 169), detects the burst with a sqrt(TS) of 19.53 in a 8.192 s analysis time bin. \n\nNITRATES results are consistent with a burst coming from outside the FOV, with DeltaLLHOut of -28.84.\n\nSee Section 9.1 and Figures 10 and 17 in the NITRATES paper for brief descriptions and interpretation of sqrt(TS), DeltaLLHPeak, and DeltaLLHOut. \n\nGUANO is a fully autonomous, extremely low latency, spacecraft commanding pipeline designed for targeted recovery of BAT event mode data around the times of compelling astrophysical events to enable more sensitive GRB searches. \n\nA live reporting of Swift/BAT event data recovered by GUANO can be found at: https://www.swift.psu.edu/guano/\n\n\n---\nTo unsubscribe, open this link in a web browser:\nhttps://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjg3NjE4Mjc1LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.oRcHDIJZdpzw7mn1lvfAC4FIoWWovXJI-9kZ5Dd29v8\n\n",
"published": "2023-06-24T14:51:24.923739Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-24T14:51:24.923758Z",
"modified": "2023-06-24T14:51:24.928757Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1335,
"topic": "igwn.gwalert",
"uuid": "3042b342-ee8a-425e-89be-99729b55badc",
"title": "S230718q - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230718q/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230718q/view/"
},
"event": {
"far": 2.17891e-05,
"time": "2023-07-18T03:52:21.629Z",
"group": "Burst",
"search": "AllSky",
"area_50": 1012.1881361246673,
"area_90": 3429.3538343328282,
"duration": 0.007288,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "c30a25c7334045803d6fcb1294e74814",
"classification": {},
"skymap_version": 0,
"central_frequency": 230.441483
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-07-18T03:56:09Z",
"superevent_id": "S230718q",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-18T03:56:10.303176Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-18T03:56:10.303208Z",
"modified": "2023-07-18T03:56:10.310134Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 7623,
"topic": "lvk-users.beccatest",
"uuid": "3ab40b72-240e-4ea2-bcfb-fa6fbf5ba60e",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"V1"
],
"time": [
1400452600
],
"range": 45.99399961465152
},
"message_text": "",
"published": "2024-05-22T22:36:47.687777Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-22T22:36:47.687799Z",
"modified": "2024-05-22T22:36:47.687807Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 7624,
"topic": "lvk-users.beccatest",
"uuid": "1a07c54d-2b22-42f6-8c5b-921cd421d02f",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"H1"
],
"time": [
1400452700
],
"range": 149.53984130662127
},
"message_text": "",
"published": "2024-05-22T22:38:20.080812Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-22T22:38:20.080834Z",
"modified": "2024-05-22T22:38:20.080842Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 7625,
"topic": "lvk-users.beccatest",
"uuid": "14aa3ed3-b6d2-490a-9c0d-a46a87100461",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"L1"
],
"time": [
1400452700
],
"range": 166.00183839005615
},
"message_text": "",
"published": "2024-05-22T22:38:22.096093Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-22T22:38:22.096128Z",
"modified": "2024-05-22T22:38:22.096142Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 7626,
"topic": "lvk-users.beccatest",
"uuid": "a8461daa-a8f3-474d-b3e4-0a76cc844702",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"V1"
],
"time": [
1400452700
],
"range": 45.95634473632665
},
"message_text": "",
"published": "2024-05-22T22:38:28.121017Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-22T22:38:28.121053Z",
"modified": "2024-05-22T22:38:28.121069Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 78,
"topic": "gcn.circular",
"uuid": "659dcec6-0f0f-49ed-8da6-4ec818c3d896",
"title": "IceCube-230524A: Upper limits from a search for additional neutrino events in IceCube",
"submitter": "Hop gcn.circular",
"authors": "Aswathi Balagopal V. at UW-Madison/IceCube <abalagopalv@icecube.wisc.edu>",
"data": {
"date": "23/05/25 13:54:12 GMT",
"from": "Aswathi Balagopal V. at UW-Madison/IceCube <abalagopalv@icecube.wisc.edu>",
"title": "GCN CIRCULAR",
"number": "33876",
"subject": "IceCube-230524A: Upper limits from a search for additional neutrino events in IceCube"
},
"message_text": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nIceCube has performed a search [1] for additional track-like muon neutrino events arriving from the direction of IceCube-230524A (https://gcn.gsfc.nasa.gov/gcn3/0.gcn3) in a time range of 1000 seconds centered on the alert event time (2023-05-24 11:01:16.240 UTC to 2023-05-24 11:17:56.240 UTC) during which IceCube was collecting good quality data. Excluding the event that prompted the alert, zero track-like events are found within the 90% containment region of IceCube-230524A. The IceCube sensitivity to neutrino point sources with an E^-2.5 spectrum (E^2 dN/dE at 1 TeV) within the locations spanned by the 90% spatial containment region of IceCube-230524A ranges from 1.4e-01 to 1.5e-01 GeV cm^-2 in a 1000 second time window. 90% of events IceCube would detect from a source at this declination with an E^-2.5 spectrum have energies in the approximate energy range between 3e+02 GeV and 2e+05 GeV.\n\nA subsequent search was performed including 2 days of data centered on the alert event time (2023-05-23 11:09:36.240 UTC to 2023-05-25 11:09:36.240 UTC). In this case, we report a p-value of 1.00, consistent with no significant excess of track events. The IceCube sensitivity to neutrino point sources with an E^-2.5 spectrum (E^2 dN/dE at 1 TeV) within the locations spanned by the 90% spatial containment region of IceCube-230524A is 1.6e-01 GeV cm^-2 in a 2 day time window.\n\nThe IceCube Neutrino Observatory is a cubic-kilometer neutrino detector operating at the geographic South Pole, Antarctica. The IceCube realtime alert point of contact can\nbe reached at roc@icecube.wisc.edu.\n\n[1] IceCube Collaboration, R. Abbasi et al., ApJ 910 4 (2021)\n\n",
"published": "2023-05-25T13:54:22.058264Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-25T13:54:22.058293Z",
"modified": "2023-05-25T13:54:22.064908Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 79,
"topic": "gcn.circular",
"uuid": "e734313b-031a-4f89-97c2-3ec76eca2959",
"title": "GRB 230525A: Fermi GBM Final Localization",
"submitter": "Hop gcn.circular",
"authors": "Cori Fletcher at USRA <cfletcher@usra.edu>",
"data": {
"date": "23/05/25 14:54:44 GMT",
"from": "Cori Fletcher at USRA <cfletcher@usra.edu>",
"title": "GCN CIRCULAR",
"number": "33877",
"subject": "GRB 230525A: Fermi GBM Final Localization"
},
"message_text": "The Fermi GBM team reports the detection of a likely SHORT GRB\n\n\"At 10:46:08 UT on 25 May 2023, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 230525A (trigger 706704373/230525449).\n\nThe on-ground calculated location, using the Fermi GBM trigger data,\nis RA = 45.27, Dec = 69.35 (J2000 degrees, equivalent to J2000 3h 1m, +69d 20'),\nwith a statistical uncertainty of 6.75 degrees.\n\nThe angle from the Fermi LAT boresight is 19 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230525449/quicklook/glg_skymap_all_bn230525449.png\n\nThe HEALPix FITS file, including the estimated localization systematic, can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230525449/quicklook/glg_healpix_all_bn230525449.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230525449/quicklook/glg_lc_medres34_bn230525449.gif\"\n\n",
"published": "2023-05-25T14:54:55.921342Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-25T14:54:55.921362Z",
"modified": "2023-05-25T14:54:55.927823Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 80,
"topic": "gcn.circular",
"uuid": "baa8ab09-021b-46a3-a638-6bf4d86a0de4",
"title": "LIGO/Virgo/KAGRA S230518h: TESS observations of the localization region",
"submitter": "Hop gcn.circular",
"authors": "Rahul Jayaraman at MIT <rjayaram@mit.edu>",
"data": {
"date": "23/05/25 16:37:21 GMT",
"from": "Rahul Jayaraman at MIT <rjayaram@mit.edu>",
"title": "GCN CIRCULAR",
"number": "33878",
"subject": "LIGO/Virgo/KAGRA S230518h: TESS observations of the localization region"
},
"message_text": "R. Jayaraman, M.M. Fausnaugh, G. Mo, E. Katsavounidis, R. Vanderspek, G.R. Ricker (MIT) report:\n\nWe report observations by the Transiting Exoplanet Survey Satellite (TESS) of the Bilby sky localization region from the LVK NSBH merger event S230518h (GCN 33813, 33816; LVK collaboration), the Swope candidates presented in GCN 33829 (Coulter et al.), and the MeerLICHT candidates presented in Astronote 2023-121 (Johnston et al.). TESS has a field-of-view of 2304 deg^2, a plate scale of 21 arcseconds per pixel, and a passband between 600 and 1000 nm. TESS images its entire field of view every 200 seconds.\n\nWe used the techniques described in Mo et al. (ApJL 948 L3, 2023) to calculate an overlap between the TESS field of view and the gravitational-wave (GW) localization sky map. 15.3% of the Bilby sky localization probability fell within TESS cameras 3 and 4. TESS was observing its pre-determined fields of view for Sector 65 (https://tess.mit.edu/tess-year-5-observations/) beginning ~6.8 days prior to the LVK trigger. Observations continued until 11 hours after the time of the trigger, at which time a scheduled TESS data downlink via the Deep Space Network commenced. TESS full frame images (FFIs) were then calibrated using the TICA software package (Fausnaugh et al. RNAAS 4 251, 2020) and subsequently became public on MAST ~36 hours after downlink. Shortly after the TICA data became public at MAST, we commenced analysis of the TESS FFIs. \n\nThe Earth rose above TESSâs sun shade limits at 2023-05-10 04:23 UTC, and set below the sun shade limits at 2023-05-18 13:30 UTC, which was 32 minutes after the GW trigger. Earthshine during these times introduces strong scattered light signals in the TESS images, which manifests as a time-variable background that complicates our analysis.\n\nUsing reference images from before the GW trigger, we performed difference imaging on the TESS images. We extracted differential light curves for 10,343 galaxies at distances between 200 and 400 Mpc from the GLADE+ catalog (Dálya et al. MNRAS 514 1 1403â1411, 2022) that lie within the GW sky localization. Comparing the flux in each light curve during the 4 days prior to the GW trigger with the flux during the 11 hours after the trigger, we find 40 light curves with a nominal 7-sigma difference. Visual inspection shows that these deviations are mainly caused by crowding of bright stars in the TESS photometric apertures, implying that these deviations are related to residual systematic errors in the photometry. Smaller deviations might still be candidates, but interpretation of these light curves is difficult due to the variable backgrounds from earthshine.\n\nThe three Swope candidates (GCN 33829, Coulter et al.) and two MeerLICHT candidates (Astronote 2023-121, Johnston et al.) lie within the TESS field of view. We extracted differential light curves for these candidates as well. The TESS light curves on 4-hour timescales are consistent with zero flux, implying the following 5-sigma upper limits on any transients from 6.8 days prior to 11 hours after the GW trigger:\n\nSwope Candidate | TESS magnitude limits\nSSS23a | >18.98\nSSS23b | >18.51\nSSS23c | >18.03\n\nMeerLICHT Candidate | TESS magnitude limits\nAT 2023iyb | >18.93\nAT 2023ixg | >17.38\n\nFor AT2023iyb, the TESS limit is consistent with the MeerLICHT measurement if the transient is relatively blue.\n\n",
"published": "2023-05-25T16:37:30.677330Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-25T16:37:30.677352Z",
"modified": "2023-05-25T16:37:30.683662Z",
"nonlocalizedevents": [
{
"event_id": "S230518h"
}
],
"targets": []
},
{
"id": 568,
"topic": "hermes.message",
"uuid": "bbf50a3b-52d4-4985-8c9d-f95ac2271afb",
"title": "INTEGRAL follow-up of S230624bd",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230624bd at 2023-06-24T13:15:43.000\n\n\nSPI-ACS excesses:\nat T0+209.59 FAP = 0.047\nat T0+-4.48 FAP = 0.073\nat T0+-77.53 FAP = 0.15\nat T0+40.77 FAP = 0.36\nat T0+179.32 FAP = 1.0\n\n\n\n\nnext break in data in 40 hr: 2023-06-26T05:08:21, for 10 hr",
"published": "2023-06-24T14:55:17.490311Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-24T14:55:17.490330Z",
"modified": "2023-06-24T14:55:17.495458Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 92,
"topic": "igwn.gwalert",
"uuid": "5e4a8d46-451a-4879-807f-113241007314",
"title": "S230527ch - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230527ch/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230527ch/view/"
},
"event": {
"far": 2.53734e-06,
"time": "2023-05-27T18:10:28.684Z",
"group": "Burst",
"search": "AllSky",
"duration": 0.050814,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "1e20793bf8fa5f0e0dafaa4e580d081c",
"classification": {},
"skymap_version": 0,
"central_frequency": 1074.69812
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-05-27T18:18:14Z",
"superevent_id": "S230527ch",
"external_coinc": null
},
"message_text": "",
"published": "2023-05-27T18:18:15.356740Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-05-27T18:18:15.356786Z",
"modified": "2023-05-27T18:18:15.365812Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 93,
"topic": "hermes.message",
"uuid": "3d97b885-0f59-48c9-a40d-0f33731051df",
"title": "INTEGRAL follow-up of S230527ch",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230527ch at 2023-05-27T18:10:28.000\n\n\nSPI-ACS excesses:\nat T0+1.98 FAP = 0.079\nat T0+9.15 FAP = 0.094\nat T0+248.4 FAP = 0.446\nat T0+138.35 FAP = 0.648\nat T0+-43.2 FAP = 0.684\nat T0+121.9 FAP = 0.754\n\n\n\n\nnext break in data in 5.7 hr: 2023-05-27T23:55:21, for 9.3 hr",
"published": "2023-05-27T18:22:50.338142Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-05-27T18:22:50.338182Z",
"modified": "2023-05-27T18:22:50.343259Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 100,
"topic": "igwn.gwalert",
"uuid": "b83e98ec-d70d-4d68-b642-89cbd9bc3a69",
"title": "S230528bt - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230528bt/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230528bt/view/"
},
"event": {
"far": 2.872341078306187e-07,
"time": "2023-05-28T14:51:29.733Z",
"group": "CBC",
"search": "AllSky",
"area_50": 2.148591731740587,
"area_90": 2.148591731740587,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.04264138160689884,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "bc019960231f907565492a7c51e7a81d",
"classification": {
"BBH": 0.8800896130199481,
"BNS": 4.095836186293947e-18,
"NSBH": 3.2727855767245523e-16,
"Terrestrial": 0.11991038698005152
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-05-28T14:56:27Z",
"superevent_id": "S230528bt",
"external_coinc": null
},
"message_text": "",
"published": "2023-05-28T14:56:29.641322Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-05-28T14:56:29.641349Z",
"modified": "2023-05-28T14:56:29.646398Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 101,
"topic": "hermes.message",
"uuid": "431a8f1e-3f13-48c4-8faf-3094bb4d63a5",
"title": "INTEGRAL follow-up of S230528bt",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230528bt at 2023-05-28T14:51:29.000\n\n\nSPI-ACS excesses:\nat T0+0.38 FAP = 0.014\nat T0+2.68 FAP = 0.097\nat T0+3.71 FAP = 0.173\nat T0+39.66 FAP = 0.419\nat T0+-22.27 FAP = 0.814\nat T0+273.18 FAP = 0.831\nat T0+-185.07 FAP = 0.859\nat T0+15.28 FAP = 0.893\nat T0+7.93 FAP = 0.903\nat T0+-86.22 FAP = 0.985\n\n\n\n\nnext break in data in 49 hr: 2023-05-30T15:45:39, for 9.3 hr",
"published": "2023-05-28T15:05:48.871206Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-05-28T15:05:48.871226Z",
"modified": "2023-05-28T15:05:48.876271Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 569,
"topic": "hermes.message",
"uuid": "282dfd83-acb3-450b-b59a-b03bbfd06dee",
"title": "INTEGRAL follow-up of S230623m",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230623m at 2023-06-23T04:26:43.000\n\n\nSPI-ACS excesses:\nat T0+17.01 FAP = 0.089\nat T0+39.38 FAP = 0.309\nat T0+-18.39 FAP = 0.367\nat T0+-51.52 FAP = 0.425\nat T0+-102.27 FAP = 0.849\nat T0+-219.77 FAP = 0.893\n\n\n\n\nnext break in data in 10 hr: 2023-06-23T14:25:12, for 9.3 hr",
"published": "2023-06-24T15:10:51.443164Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-24T15:10:51.443185Z",
"modified": "2023-06-24T15:10:51.448105Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 7627,
"topic": "lvk-users.beccatest",
"uuid": "e3312524-a5f5-4819-abbc-8f286410ebba",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"H1"
],
"time": [
1400452800
],
"range": 151.63271208852544
},
"message_text": "",
"published": "2024-05-22T22:40:00.277519Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-22T22:40:00.277542Z",
"modified": "2024-05-22T22:40:00.277551Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 7628,
"topic": "lvk-users.beccatest",
"uuid": "91e0a0a2-01b8-4b14-9267-295d0086c88c",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"L1"
],
"time": [
1400452800
],
"range": 166.12864436380892
},
"message_text": "",
"published": "2024-05-22T22:40:03.303263Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-22T22:40:03.303292Z",
"modified": "2024-05-22T22:40:03.303300Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 81,
"topic": "gcn.circular",
"uuid": "9efbdec5-6111-42b3-af75-3e4a509dfe1f",
"title": "GRB 230525A: Fermi GBM Detection",
"submitter": "Hop gcn.circular",
"authors": "sumanbala2210@gmail.com",
"data": {
"date": "23/05/25 17:10:06 GMT",
"from": "sumanbala2210@gmail.com",
"title": "GCN CIRCULAR",
"number": "33879",
"subject": "GRB 230525A: Fermi GBM Detection"
},
"message_text": "S. Bala (USRA), C. Fletcher (USRA), O.J. Roberts (NASA/MSFC) and C. Meegan (UAH)\n report on behalf of the Fermi Gamma-ray Burst Monitor Team:\n\n\"At 10:46:08.33 UT on 25 May 2023, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 230525A (trigger 706704373/230525449).\nThe Fermi GBM Final Real-time Localization was reported in GCN 33877.\n\nThe angle from the Fermi LAT boresight is 19 degrees.\n\nThe GBM light curve consists of single peak with a duration (T90)\nof 0.12 s (50-300 keV). The time-averaged spectrum\nfrom T0-0.06 to T0+0.06 s is best fit by\na power law function with an exponential high-energy cutoff.\nThe power law index is -0.80 +/- 0.09 and the cutoff energy,\nparameterized as Epeak, is 789 +/- 148 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(8.6 +/- 0.4)E-07 erg/cm^2. The 64-ms peak photon flux measured\nstarting from T0-0.064 s in the 10-1000 keV band is 25 +/- 1 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog:\nhttps://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html\n\nFor Fermi GBM data and info, please visit the official Fermi GBM Support Page:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"\n\n",
"published": "2023-05-25T17:10:15.229874Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-25T17:10:15.229895Z",
"modified": "2023-05-25T17:10:15.235512Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 82,
"topic": "gcn.circular",
"uuid": "645b2d3f-7460-40df-bf58-2296987c9581",
"title": "GRB 230510A: Swift-BAT refined analysis",
"submitter": "Hop gcn.circular",
"authors": "Takanori Sakamoto at AGU <tsakamoto@phys.aoyama.ac.jp>",
"data": {
"date": "23/05/26 13:27:36 GMT",
"from": "Takanori Sakamoto at AGU <tsakamoto@phys.aoyama.ac.jp>",
"title": "GCN CIRCULAR",
"number": "33880",
"subject": "GRB 230510A: Swift-BAT refined analysis"
},
"message_text": "S. Laha (GSFC/UMBC), S. D. Barthelmy (GSFC), R. A. J. Eyles-Ferris (U Leicester),\nH. A. Krimm (NSF), A. Y. Lien (U Tampa), C. B. Markwardt (GSFC), D. M. Palmer (LANL),\nT. Parsotan (GSFC/UMBC), T. Sakamoto (AGU), M. Stamatikos (OSU)\n(i.e. the Swift-BAT team):\n Using the data set from T-240 to T+349 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 230510A (trigger #1167973)\n(Eyles-Ferris, et al., GCN Circ. 33752). The BAT ground-calculated position is\nRA, Dec = 318.138, 34.430 deg which is\n RA(J2000) = 21h 12m 33.2s\n Dec(J2000) = +34d 25' 49.8\"\nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 100%.\n The mask-weighted light curve shows a precursor starting at T-150 s with\na duration of ~20 s. The bright main episode starts at T-10 s, peaks at\nT+15 s, and ends at T+60 s. T90 (15-350 keV) is 178.4 +- 6.9 sec\n(estimated error including systematics).\n The time-averaged spectrum from T-145.6 to T+56.8 sec is best fit by a simple\npower-law model. The power law index of the time-averaged spectrum is\n1.60 +- 0.09. The fluence in the 15-150 keV band is 1.0 +- 0.1 x 10^-5 erg/cm2.\nThe 1-sec peak photon flux measured from T+13.39 sec in the 15-150 keV band\nis 5.9 +- 0.3 ph/cm2/sec. All the quoted errors are at the 90% confidence\nlevel.\n The results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/1167973/BA/\n\n",
"published": "2023-05-26T13:27:45.372905Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-26T13:27:45.372926Z",
"modified": "2023-05-26T13:27:45.379678Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 83,
"topic": "gcn.circular",
"uuid": "cf9ff53a-eaf1-4432-bc36-74edff13977b",
"title": "LIGO/Virgo/KAGRA S230518h: Upper limits from Glowbug gamma-ray observations",
"submitter": "Hop gcn.circular",
"authors": "matthew.kerr@gmail.com",
"data": {
"date": "23/05/26 17:28:30 GMT",
"from": "matthew.kerr@gmail.com",
"title": "GCN CIRCULAR",
"number": "33881",
"subject": "LIGO/Virgo/KAGRA S230518h: Upper limits from Glowbug gamma-ray observations"
},
"message_text": "M. Kerr, J. E. Grove, C.C. Cheung, R. Woolf (Naval Research Laboratory) and A. Goldstein (USRA) report:\n\nThe compact binary merger candidate S230518h (event time, T0 = 2023-05-18 12:59:08.167 UTC) was identified by the LIGO Observatory (H1, L1) during its engineering run prior to the start of the O4 observing run (GCN 33813).\nThe Glowbug gamma-ray instrument [1,2], launched in March 2023, observed much of the sky to which a high probability for the candidate origin was assigned. Glowbug has an all-sky field-of-view limited only by earth occultation and large-scale structures on the International Space Station (ISS). At T0, the Glowbug boresight was pointed towards R.A., Dec. = 158, 59 deg. The probability peak for the candidate origin (R.A., Dec. = 96, -11 deg.) was thus 78 deg. below the Glowbug boresight and more than 30 deg. above the earth limb. In total, 81% of the 90% confidence counterpart region was unocculted by the earth.\n\nUsing 50-2000 keV data and representative three representative (soft, medium, and hard spectrum) GRB templates from [3], we searched for transient gamma-ray signals using maximum likelihood methods and found no plausible counterpart up to 30s before or after T0. We determined 3-sigma upper limits on the flux for a GRB originating at the probability peak (R.A., Dec. = 96, -11 deg.) by selecting data centered on T0 and integrating the posterior probability to determine the flux beyond which the tail probability is 0.27%. For various timescales and the three GRB spectral templates, these limits in units of 1e-7 erg/cm2/s are:\nTimescale Soft Normal Hard\n------------------------------------\n0.128 s: 0.9 1.8 9.1\n1.024 s: 0.2 0.5 2.5\n8.192 s: 0.2 0.3 1.2\n\nThese results do not account for scattering or occultation by structures on the ISS.\n\nGlowbug is a NASA-funded technology demonstrator for sensitive, low-cost gamma-ray transient telescopes developed, built, and operated by the U.S. Naval Research Laboratory (NRL) with support from the University of Alabama in Huntsville, USRA, and NASA MSFC. It was launched on 2023 March 15 aboard the Department of Defense Space Test Programâs STP-H9 to the ISS. The detector comprises 12 large-area (15 cm x 15 cm) CsI:Tl panels covering the surface of a half cube, and two hexagonal (5-cm diameter, 10-cm length) CLLB scintillators, giving it a large field of view (instantaneous FoV ~2/3 sky) over a wide energy band of 50 keV to >2 MeV.\n\n[1] Grove, J.E. et al. 2020, Proc. Yamada Conf. LXXI, arXiv:2009.11959\n[2] Woolf, R.S. et al. 2022, Proc. SPIE, 12181, id. 121811O\n[3] Goldstein, A. et al. 2020, ApJ 895, 40, arXiv :1909.03006\n\nDistribution Statement A: Approved for public release. Distribution is unlimited.\n\n",
"published": "2023-05-26T17:28:44.792015Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-26T17:28:44.792053Z",
"modified": "2023-05-26T17:28:44.803505Z",
"nonlocalizedevents": [
{
"event_id": "S230518h"
}
],
"targets": []
},
{
"id": 84,
"topic": "gcn.circular",
"uuid": "e661392a-4a39-4265-96ab-79f71c8f0dbb",
"title": "Fermi-LAT gamma-ray observations of IceCube-230524A",
"submitter": "Hop gcn.circular",
"authors": "Sara Buson at GSFC/Fermi <sara.buson@gmail.com>",
"data": {
"date": "23/05/26 21:44:19 GMT",
"from": "Sara Buson at GSFC/Fermi <sara.buson@gmail.com>",
"title": "GCN CIRCULAR",
"number": "33882",
"subject": "Fermi-LAT gamma-ray observations of IceCube-230524A"
},
"message_text": "J. Sinapius (DESY-Zeuthen), S. Garrappa (Ruhr-Universitaet Bochum) and S. Buson (Univ. of Wuerzburg) on behalf of the Fermi-LAT collaboration:\nWe report an analysis of observations of the vicinity of the IC230524A high-energy neutrino event (GCN 33633) with all-sky survey data from the Large Area Telescope (LAT), on board the Fermi Gamma-ray Space Telescope. The IceCube event was detected on 2023-05-24 at 11:09:36.24 UT (T0) with J2000 position RA = 318.43 (+3.12, -2.59) deg, Decl. = +2.84 (+2.55, -2.43) deg (90% PSF containment). Five cataloged gamma-ray (>100 MeV; The Fermi-LAT collaboration 2022, ApJS, 260, 53) sources are located within the 90% IC230524A localization region. These sources are 4FGL J2110.3+0404, at a distance of 1.5 deg from the IC best-fit position, 4FGL J2109.6+0440, at a distance of 2.1 deg, 4FGL J2122.5+0345, at a distance of 2.4 deg, 4FGL J2104.7+0108, at a distance of 2.8 deg, and 4FGL J2125.6+0458 at a distance of 3.7 deg. Based on a preliminary analysis of the LAT data over a month and day timescale prior T0, these objects are not significantly detected at gamma rays.\nWe searched for intermediate (days to years) timescale emission from a new gamma-ray transient source. Preliminary analysis indicates no significant (> 5 sigma) new excess emission (> 100 MeV) at the IC230524A best-fit position. Assuming a power-law spectrum (photon index = 2.0 fixed) for a point source at the IC230524A best-fit position, the >100 MeV flux upper limit (95% confidence) is < 3.6e-10 ph cm^-2 s^-1 for ~14-years (2008-08-04 to 2023-05-24 UTC), and < 3.7e-9 (<6.0e-8) ph cm^-2 s^-1 for a 1-month (1-day) integration time before T0.\nWithin the 90% confidence localization of the neutrino, 2.3 deg offset from the best-fit IC230524A position, an excess of gamma rays, Fermi J2106.3+0125 was detected in an analysis of the ~14-years integrated LAT data (100 MeV - 1 TeV) prior to T0. This putative new source is detected at a statistical significance ~5 sigma (calculated following the prescription adopted in the Fourth Fermi-LAT catalog, The Fermi-LAT collaboration 2020, ApJS, 247, 33). Assuming a power-law spectrum, the excess has best-fit localization of RA = 316.58 deg, Decl. = 1.43 deg (95% containment radius = 0.13 deg) with best-fit spectral parameters, flux = (8.6 +/- 3.9)e-10 ph cm^-2 s^-1, index = 1.9 +/-0.1. In a preliminary analysis of the LAT data over one month prior to T0, Fermi J2106.3+0125 is not significantly detected. All values include the statistical uncertainty only.\n\nSince Fermi normally operates in an all-sky scanning mode, regular monitoring of this region will continue. For these observations the Fermi-LAT contact persons are S. Garrappa (simone.garrappa at ruhr-uni-bochum.de <http://ruhr-uni-bochum.de/>), J. Sinapius (jonas.sinapius at desy.de <http://desy.de/>) and S. Buson (sara.buson at uni-wuerzburg.de <http://uni-wuerzburg.de/>).\nThe Fermi-LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden.\n\n",
"published": "2023-05-26T21:44:27.677098Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-26T21:44:27.677119Z",
"modified": "2023-05-26T21:44:27.683082Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 132,
"topic": "gcn.circular",
"uuid": "7ee22acb-309a-4cdd-848a-e0ada253b93f",
"title": "GRB 230522A: GRBAlpha and VZLUSAT-2 joint detection",
"submitter": "Hop gcn.circular",
"authors": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"data": {
"date": "23/06/02 16:58:50 GMT",
"from": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"title": "GCN CIRCULAR",
"number": "33905",
"subject": "GRB 230522A: GRBAlpha and VZLUSAT-2 joint detection"
},
"message_text": "M. Dafcikova, J. Ripa (Masaryk U.), A. Pal (Konkoly Observatory), N. Werner (Masaryk U.), M. Ohno, H. Takahashi (Hiroshima U.), L. Meszaros, B. Csak (Konkoly Observatory), N. Husarikova, F. Munz, M. Topinka, M. Kolar, J.-P. Breuer, F. Hroch (Masaryk U.), J. Hudec, J. Kapus, M. Frajt, M. Rezenov (Spacemanic s.r.o), R. Laszlo, M. Koleda (Needronix s.r.o), G. Galgoczi (Wigner Research Center/Eotvos U.), N. Uchida (ISAS/JAXA), T. Enoto (Kyoto U.), Zs. Frei (Eotvos U.), Y. Fukazawa, K. Hirose, H. Poon, H. Matake (Hiroshima U.), S. Hisadomi (Nagoya U.), Y. Ichinohe (Rikkyo U.), L. L. Kiss (Konkoly Observatory), T. Mizuno (Hiroshima U.), K. Nakazawa (Nagoya U.), H. Odaka (U. Tokyo), K. Torigoe, Y. Uchida (Hiroshima U.), P. Svoboda, V. Daniel, J. Dudas, M. Junas, J. Gromes (VZLU), I. Vertat (FEL ZCU), T. Urbanec, M. Kasal, A. Povalac (Brno U. of Technology), M. Smelko, P. Hanak, P. Lipovsky (Technical U. of Kosice), T. Bozoki, G. Dalya, G. Friss, K. Kapas, J. Takatsy (Eotvos U.), N. Kogiso, M. Yoneyama (Osaka Metropolitan U.), M. Moritaki (U. Tokyo), T. Kano (U. Michigan) -- the GRBAlpha and VZLUSAT-2/GRB payload collaborations\n\nWe report a joint detection of a likely long-duration GRB 230522A by the GRBAlpha 1U CubeSat (Pal et al. 2023; arXiv:2302.10048) and the GRB detectors on board of VZLUSAT-2 3U CubeSat (https://www.vzlusat2.cz/en/) The event was triggered by Konus/Wind at 2023-05-22 03:34:41.414 UT and also observed by INTEGRAL/SPI-ACS at 2023-05-22 03:34:45 UT. The Sun was occulted by the Earth for both CubeSats, therefore, it is unlikely to be a solar flare.\n\nThe GRBAlpha detection was confirmed at the peak time 2023-05-22 03:34:45 UTC. The T90 duration is 11 s and the significance during T90 reaches 47 sigma.\n\nThe light curve obtained by GRBAlpha is available here:\nhttps://grbalpha.konkoly.hu/static/share/GRB230522A_GCN.pdf\n\nThe VZLUSAT-2 detection was confirmed at the peak time 2023-05-22 03:34:43 UTC. The data acquisition was performed by the GRB detector units no. 0 and no. 1. The T90 duration is 10 s (12 s) and the significance during T90 reaches 30 sigma (9 sigma) for detector unit no. 0 (no. 1).\n\nThe light curves obtained by VZLUSAT-2 are available here:\nhttps://vzlusat2.konkoly.hu/static/share/GRB230522A_GCN_VZLUSAT2.pdf\n\nAll GRBAlpha detections are listed at: https://monoceros.physics.muni.cz/hea/GRBAlpha/ \nGRBAlpha, launched on 2021 March 22, is a demonstration mission for a future CubeSat constellation (Werner et al. Proc. SPIE 2018). The detector of GRBAlpha consists of a 75 x 75 x 5 mm3 CsI scintillator read out by a SiPM array, covering the energy range from ~50 keV to ~1000 keV. To increase the duty cycle and the downlink rate, the upgrade of the on-board data acquisition software stack is in progress. The ground segment is also supported by the radio amateur community and it takes advantage of the SatNOGS network for increased data downlink volume. \n\nAll VZLUSAT-2 detections are listed at: https://monoceros.physics.muni.cz/hea/VZLUSAT-2/\nThe GRB detectors on VZLUSAT-2 are a demonstration payload for a future CubeSat constellation (Werner et al. Proc. SPIE 2018). Two GRB modules of VZLUSAT-2 are placed in a perpendicular manner and each consists of a 75 x 75 x 5 mm3 CsI scintillator read out by a SiPM array, covering the energy range from ~30 keV to ~1000 keV. VZLUSAT-2 was launched on 2022 January 13 from Cape Canaveral.\n\n",
"published": "2023-06-02T16:59:01.805363Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-02T16:59:01.805437Z",
"modified": "2023-06-02T16:59:01.813635Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 570,
"topic": "hermes.message",
"uuid": "2d63af2f-71d2-4d8c-89b8-9255f4ac6b70",
"title": "INTEGRAL follow-up of S230623ai",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230623ai at 2023-06-23T15:42:26.000\n\n\n\n\n\nbreak since 1.3 hr next data in 8 hr",
"published": "2023-06-24T15:12:08.562358Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-24T15:12:08.562377Z",
"modified": "2023-06-24T15:12:08.567235Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 635,
"topic": "igwn.gwalert",
"uuid": "b3ef7cf2-8321-495c-9956-8b598ef867e1",
"title": "S230626t - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230626t/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230626t/view/"
},
"event": {
"far": 1.839969081629533e-05,
"time": "2023-06-26T05:02:48.513Z",
"group": "CBC",
"search": "AllSky",
"area_50": 218.11143604925206,
"area_90": 1200.1899126519686,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.4891259650815578,
"HasRemnant": 1.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "d11f350ac411e7bb2164e5fef885ae59",
"classification": {
"BBH": 0.0,
"BNS": 0.031727218446709435,
"NSBH": 0.015607118018778203,
"Terrestrial": 0.9526656635345123
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-06-26T05:07:52Z",
"superevent_id": "S230626t",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-26T05:07:53.992342Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-26T05:07:53.992366Z",
"modified": "2023-06-26T05:07:53.997565Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 636,
"topic": "hermes.message",
"uuid": "e1873c7a-ec1b-400a-958a-d3e108fa82cb",
"title": "INTEGRAL follow-up of S230626t",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230626t at 2023-06-26T05:02:48.000\n\n\nSPI-ACS excesses:\nat T0+-0.8 FAP = 0.009\nat T0+-8.92 FAP = 0.651\n\n\n\n\nnext break in data in 0.092 hr: 2023-06-26T05:08:21, for 10 hr",
"published": "2023-06-26T05:15:32.042466Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-26T05:15:32.042485Z",
"modified": "2023-06-26T05:15:32.047490Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1336,
"topic": "igwn.gwalert",
"uuid": "d6c14972-5bfc-4163-af9a-89daf3af12af",
"title": "S230718q - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230718q/files/cwb.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230718q/view/"
},
"event": {
"far": 2.17891e-05,
"time": "2023-07-18T03:52:21.629Z",
"group": "Burst",
"search": "AllSky",
"area_50": 1012.1881361246673,
"area_90": 3429.3538343328282,
"duration": 0.007288,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "c30a25c7334045803d6fcb1294e74814",
"classification": {},
"skymap_version": 0,
"central_frequency": 230.441483
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-07-18T04:00:43Z",
"superevent_id": "S230718q",
"external_coinc": null
},
"message_text": "",
"published": "2023-07-18T04:00:44.277961Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-07-18T04:00:44.278014Z",
"modified": "2023-07-18T04:00:44.283895Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 7629,
"topic": "lvk-users.beccatest",
"uuid": "74d8b37a-f0b8-45b0-98c2-668b0fcb4488",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"V1"
],
"time": [
1400452800
],
"range": 45.808624110191076
},
"message_text": "",
"published": "2024-05-22T22:40:09.325424Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-22T22:40:09.325446Z",
"modified": "2024-05-22T22:40:09.325454Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 94,
"topic": "gcn.circular",
"uuid": "4e39dbde-8af5-4761-9f38-5461bc594a9c",
"title": "Alert from the HAWC Burst Monitor HAWC-230527A",
"submitter": "Hop gcn.circular",
"authors": "Hugo Ayala at Pennsylvania State University <hgayala@psu.edu>",
"data": {
"date": "23/05/27 18:40:32 GMT",
"from": "Hugo Ayala at Pennsylvania State University <hgayala@psu.edu>",
"title": "GCN CIRCULAR",
"number": "33886",
"subject": "Alert from the HAWC Burst Monitor HAWC-230527A"
},
"message_text": "The HAWC Collaboration (http://www.hawc-observatory.org/collaboration/)\nreports:\n\nOn 05/27, 2023, at 11:19:48 UT, HAWC detected a burst signal\nfrom its Burst Monitoring named HAWC-230527A. This monitor system looks\nfor excesses above the expected background in time windows of 0.2, 1, 10\nand 100 seconds.\nThis event was found in the 100-second time window starting\nat the reported trigger time.\n\nThe position of the alert is\nRA (J200): 272.266 deg\nDec (J2000): 26.715 deg\nLocation uncertainty (68% containment): 0.4 deg (statistical only).\n\nThe monitor system found that this alert has a false alarm rate of 9.79\nalert(s) per year.\nWe encourage follow-up observations of the HAWC alert region. We however\nnote that it is\nconsistent with background expectation based on the observation time.\n\nThe initial automated alert is recorded in here:\nhttps://gcn.gsfc.nasa.gov/notices_amon_hawc/10011394_3758.amon\n\nHAWC is a very-high-energy gamma-ray observatory operating in Central\nMexico at latitude 19 deg. north. Operating day and night with over\n95% duty cycle, HAWC has an instantaneous field of view of 2 sr and\nsurveys 2/3 of the sky every day. It is sensitive to gamma rays\nfrom 300 GeV to 100 TeV.\n\n",
"published": "2023-05-27T18:40:42.025146Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-27T18:40:42.025179Z",
"modified": "2023-05-27T18:40:42.030548Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 95,
"topic": "igwn.gwalert",
"uuid": "3c0ba1d2-e677-4d10-acac-3ffda408ba16",
"title": "S230528a - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230528a/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230528a/view/"
},
"event": {
"far": 3.038830129753478e-07,
"time": "2023-05-28T02:27:14.803Z",
"group": "CBC",
"search": "AllSky",
"area_50": 2.148591731740587,
"area_90": 2.148591731740587,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.974013044198111,
"HasRemnant": 0.01733164173860173
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "ecbcbb3676938050c28924e0eed79bc0",
"classification": {
"BBH": 0.0,
"BNS": 0.20222651025283195,
"NSBH": 0.4408798931092301,
"Terrestrial": 0.35689359663793796
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-05-28T02:27:44Z",
"superevent_id": "S230528a",
"external_coinc": null
},
"message_text": "",
"published": "2023-05-28T02:27:45.413710Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-05-28T02:27:45.413750Z",
"modified": "2023-05-28T02:27:45.419682Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 96,
"topic": "hermes.message",
"uuid": "2358b393-149c-414a-a219-eb6e622b225a",
"title": "INTEGRAL follow-up of S230528a",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230528a at 2023-05-28T02:27:14.000\n\n\n\n\n\nbreak since 2.5 hr next data in 6.7 hr",
"published": "2023-05-28T02:28:14.485662Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-05-28T02:28:14.485683Z",
"modified": "2023-05-28T02:28:14.490528Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 97,
"topic": "igwn.gwalert",
"uuid": "b0ea451b-9094-4a50-a756-215888e6ecd2",
"title": "S230528a - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230528a/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230528a/view/"
},
"event": {
"far": 3.038830129753478e-07,
"time": "2023-05-28T02:27:14.803Z",
"group": "CBC",
"search": "AllSky",
"area_50": 2.148591731740587,
"area_90": 2.148591731740587,
"duration": null,
"pipeline": "spiir",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.974013044198111,
"HasRemnant": 0.01733164173860173
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "ecbcbb3676938050c28924e0eed79bc0",
"classification": {
"BBH": 0.0,
"BNS": 0.20222651025283195,
"NSBH": 0.4408798931092301,
"Terrestrial": 0.35689359663793796
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-05-28T02:32:21Z",
"superevent_id": "S230528a",
"external_coinc": null
},
"message_text": "",
"published": "2023-05-28T02:32:22.100820Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-05-28T02:32:22.100843Z",
"modified": "2023-05-28T02:32:22.105438Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 98,
"topic": "hermes.message",
"uuid": "26ad5256-6ced-4aa3-ae58-e0e74835b280",
"title": "INTEGRAL follow-up of S230528ay",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230528ay at 2023-05-28T11:10:53.000\n\n\nSPI-ACS excesses:\nat T0+-15.58 FAP = 0.052\nat T0+65.72 FAP = 0.114\nat T0+176.07 FAP = 0.166\nat T0+6.02 FAP = 0.211\nat T0+8.89 FAP = 0.238\nat T0+-136.86 FAP = 0.463\nat T0+16.69 FAP = 0.515\nat T0+34.44 FAP = 0.666\nat T0+-7.91 FAP = 0.741\n\n\n\n\nnext break in data in 53 hr: 2023-05-30T15:45:39, for about 9 hr",
"published": "2023-05-28T11:43:55.968139Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-05-28T11:43:55.968161Z",
"modified": "2023-05-28T11:43:55.975042Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 99,
"topic": "igwn.gwalert",
"uuid": "4dfd9bbb-0f0a-4d1a-ab27-fed153df69b5",
"title": "S230528bt - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230528bt/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230528bt/view/"
},
"event": {
"far": 2.872341078306187e-07,
"time": "2023-05-28T14:51:29.733Z",
"group": "CBC",
"search": "AllSky",
"area_50": 2.148591731740587,
"area_90": 2.148591731740587,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.04264138160689884,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "bc019960231f907565492a7c51e7a81d",
"classification": {
"BBH": 0.8800896130199481,
"BNS": 4.095836186293947e-18,
"NSBH": 3.2727855767245523e-16,
"Terrestrial": 0.11991038698005152
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-05-28T14:51:52Z",
"superevent_id": "S230528bt",
"external_coinc": null
},
"message_text": "",
"published": "2023-05-28T14:51:54.027007Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-05-28T14:51:54.027033Z",
"modified": "2023-05-28T14:51:54.032614Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 571,
"topic": "hermes.message",
"uuid": "394725d3-0b4f-4e41-a517-251bd30cb211",
"title": "INTEGRAL follow-up of S230623av",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230623av at 2023-06-23T17:47:25.000\n\n\n\n\n\nbreak since 3.4 hr next data in 5.9 hr",
"published": "2023-06-24T15:13:26.853144Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-24T15:13:26.853163Z",
"modified": "2023-06-24T15:13:26.857823Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 133,
"topic": "gcn.circular",
"uuid": "a707a219-41df-4cf8-add3-573d3fc4612c",
"title": "GRB 230521A: VZLUSAT-2 detection",
"submitter": "Hop gcn.circular",
"authors": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"data": {
"date": "23/06/02 17:43:46 GMT",
"from": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"title": "GCN CIRCULAR",
"number": "33906",
"subject": "GRB 230521A: VZLUSAT-2 detection"
},
"message_text": "M. Dafcikova, J. Ripa (Masaryk U.), A. Pal (Konkoly Observatory), N. Werner (Masaryk U.), M. Ohno (Hiroshima U.), L. Meszaros, B. Csak (Konkoly Observatory), H. Takahashi (Hiroshima U.), F. Munz , M. Topinka, F. Hroch, N. Husarikova, J.-P. Breuer (Masaryk U.), J. Hudec, J. Kapus, M. Frajt, M. Rezenov (Spacemanic s.r.o), R. Laszlo (Needronix), G. Galgoczi (Wigner Research Center/Eotvos U.), N. Uchida (ISAS/JAXA), T. Enoto (Kyoto U.), Zs. Frei (Eotvos U.), Y. Fukazawa, K. Hirose, H. Matake (Hiroshima U.), S. Hisadomi (Nagoya U.), Y. Ichinohe (Rikkyo U.), L. L. Kiss (Konkoly Observatory), T. Mizuno (Hiroshima U.), K. Nakazawa (Nagoya U.), H. Odaka (Univ of Tokyo), K. Torigoe (Hiroshima U.), P. Svoboda, V. Daniel, J. Dudas, M. Junas, J. Gromes (VZLU), I. Vertat (FEL ZCU) -- the VZLUSAT-2/GRB payload collaboration.\n\nThe GRB detectors on board of the VZLUSAT-2 3U CubeSat (https://www.vzlusat2.cz/en/) detected a likely long-duration GRB 230521A. The event was triggered by Konus/Wind at 2023-05-21 18:52:04.019 UT and also observed by INTEGRAL/SPI-ACS at 2023-05-21 18:52:13 UT. The GOES-P X-ray flux does not show any increase at the time of this detection, therefore, it is unlikely to be a solar flare.\n\nThe data acquisition was performed by the GRB detector units no. 0 and no. 1. The detection was confirmed at the peak time 2023-05-21 18:52:10 UTC. The T90 duration is 45 s (46 s) and the significance during T90 reaches 11 sigma (16 sigma) for detector unit no. 0 (no. 1).\n\nThe light curve obtained by VZLUSAT-2 is available here:\nhttps://vzlusat2.konkoly.hu/static/share/GRB230521A_GCN_VZLUSAT2.pdf\n\nAll VZLUSAT-2 detections are listed at: https://monoceros.physics.muni.cz/hea/VZLUSAT-2/\nThe GRB detectors on VZLUSAT-2 are a demonstration payload for a future CubeSat constellation (Werner et al. Proc. SPIE 2018). Two GRB modules of VZLUSAT-2 are placed in a perpendicular manner and each consists of a 75 x 75 x 5 mm3 CsI scintillator read out by a SiPM array, covering the energy range from ~30 keV to ~1000 keV. VZLUSAT-2 was launched on 2022 January 13 from Cape Canaveral.\n\n",
"published": "2023-06-02T17:43:54.083069Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-02T17:43:54.083089Z",
"modified": "2023-06-02T17:43:54.089953Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 572,
"topic": "hermes.message",
"uuid": "8e48b86d-bd7d-4e05-b19e-390a942f4b0e",
"title": "INTEGRAL follow-up of S230624a",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230624a at 2023-06-24T00:35:23.000\n\n\nSPI-ACS excesses:\nat T0+-137.61 FAP = 0.313\nat T0+-1.99 FAP = 0.552\nat T0+-90.99 FAP = 0.75\n\n\n\n\nnext break in data in 53 hr: 2023-06-26T05:08:21, for 10 hr",
"published": "2023-06-24T15:21:17.891511Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-24T15:21:17.891532Z",
"modified": "2023-06-24T15:21:17.896444Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 573,
"topic": "hermes.message",
"uuid": "cb018bee-12b2-490d-85bf-1738d3d03a3f",
"title": "INTEGRAL follow-up of S230623ad",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230623ad at 2023-06-23T15:21:17.000\n\n\n\n\n\nbreak since 0.93 hr next data in 8.3 hr",
"published": "2023-06-24T15:25:55.812487Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-24T15:25:55.812506Z",
"modified": "2023-06-24T15:25:55.817422Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 1337,
"topic": "hermes.message",
"uuid": "94a8b5b7-b820-48c9-a4ac-56c3b6e9fd72",
"title": "INTEGRAL follow-up of S230718q",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230718q at 2023-07-18T03:52:21.000\n\n\nSPI-ACS excesses:\n\n\n\n\nnext break in data in 48 hr: 2023-07-20T03:48:12, for 10 hr",
"published": "2023-07-18T04:05:21.198016Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-07-18T04:05:21.198041Z",
"modified": "2023-07-18T04:05:21.203311Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 7630,
"topic": "lvk-users.beccatest",
"uuid": "df6aaf35-9c11-4e68-aecb-62fd9151a562",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"H1"
],
"time": [
1400452900
],
"range": 153.28290694453966
},
"message_text": "",
"published": "2024-05-22T22:41:39.591611Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-22T22:41:39.591645Z",
"modified": "2024-05-22T22:41:39.591662Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 102,
"topic": "gcn.circular",
"uuid": "1ba3e03e-6a1e-456b-87c7-e8b26bb094f3",
"title": "GRB 230529A: Fermi GBM Final Real-time Localization",
"submitter": "Hop gcn.circular",
"authors": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"data": {
"date": "23/05/29 08:05:21 GMT",
"from": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"title": "GCN CIRCULAR",
"number": "33887",
"subject": "GRB 230529A: Fermi GBM Final Real-time Localization"
},
"message_text": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 07:54:45 UT on 29 May 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230529A (trigger 707039690.316368 / 230529330).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 346.8, Dec = -50.0 (J2000 degrees, equivalent to J2000 23h 07m, -50d 00'), with a statistical uncertainty of 12.7 degrees.\n\nThe angle from the Fermi LAT boresight is 42.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230529330/quicklook/glg_skymap_all_bn230529330.png\n\nThe HEALPix FITS file, including the estimated localization systematic, can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230529330/quicklook/glg_healpix_all_bn230529330.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230529330/quicklook/glg_lc_medres34_bn230529330.gif\n\n",
"published": "2023-05-29T08:05:33.336643Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-29T08:05:33.336674Z",
"modified": "2023-05-29T08:05:33.343668Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 103,
"topic": "igwn.gwalert",
"uuid": "3433596f-9866-457e-b211-a772daecdb3b",
"title": "S230529p - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230529p/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230529p/view/"
},
"event": {
"far": 6.287578496854043e-07,
"time": "2023-05-29T10:27:44.704Z",
"group": "CBC",
"search": "AllSky",
"area_50": 2.148591731740587,
"area_90": 2.148591731740587,
"duration": null,
"pipeline": "pycbc",
"properties": {
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},
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"significant": false,
"skymap_hash": "d9430c0287d113b17c8187c843cbbbdb",
"classification": {
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"BNS": 0.0,
"NSBH": 0.024779051187418383,
"Terrestrial": 0.9730403989163501
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-05-29T10:28:13Z",
"superevent_id": "S230529p",
"external_coinc": null
},
"message_text": "",
"published": "2023-05-29T10:28:15.119157Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-05-29T10:28:15.119188Z",
"modified": "2023-05-29T10:28:15.126273Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 104,
"topic": "igwn.gwalert",
"uuid": "63306974-3dbf-4ba6-93b3-3b8bbc84b061",
"title": "S230529p - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230529p/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230529p/view/"
},
"event": {
"far": 6.287578496854043e-07,
"time": "2023-05-29T10:27:44.704Z",
"group": "CBC",
"search": "AllSky",
"area_50": 2.148591731740587,
"area_90": 2.148591731740587,
"duration": null,
"pipeline": "pycbc",
"properties": {
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"HasMassGap": 0.1136634405729568,
"HasRemnant": 0.009234226165240977
},
"instruments": [
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"L1"
],
"significant": false,
"skymap_hash": "d9430c0287d113b17c8187c843cbbbdb",
"classification": {
"BBH": 0.0021805498962315694,
"BNS": 0.0,
"NSBH": 0.024779051187418383,
"Terrestrial": 0.9730403989163501
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-05-29T10:37:49Z",
"superevent_id": "S230529p",
"external_coinc": null
},
"message_text": "",
"published": "2023-05-29T10:37:50.855376Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-05-29T10:37:50.855424Z",
"modified": "2023-05-29T10:37:50.861469Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 105,
"topic": "hermes.message",
"uuid": "876d549f-74b1-498e-aa19-3b5d32ca86c1",
"title": "INTEGRAL follow-up of S230529p",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230529p at 2023-05-29T10:27:44.000\n\n\nSPI-ACS excesses:\nat T0+3.62 FAP = 0.021\nat T0+15.39 FAP = 0.098\nat T0+-11.11 FAP = 0.241\nat T0+247.22 FAP = 0.516\nat T0+-159.16 FAP = 0.867\nat T0+54.12 FAP = 0.99\nat T0+16.89 FAP = 0.991\n\n\n\n\nnext break in data in 29 hr: 2023-05-30T15:45:39, for 9.3 hr",
"published": "2023-05-29T10:40:38.263776Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-05-29T10:40:38.263813Z",
"modified": "2023-05-29T10:40:38.274559Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 106,
"topic": "gcn.circular",
"uuid": "e893f9d0-c3ba-4f97-bf8a-71a612da8c59",
"title": "LIGO/Virgo S230529p: 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": "23/05/29 13:58:39 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33888",
"subject": "LIGO/Virgo S230529p: 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 S230529p errorbox 531 sec after notice time and 11954 sec after trigger time at 2023-05-29 13:46:58 UT, with upper limit up to 17.0 mag. Observations started at twilight. The observations began at zenith distance = 67 deg. The sun altitude is -15.0 deg.\n\nThe galactic latitude b = -15 deg., longitude l = 256 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011906\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 12044 | 2023-05-29 13:46:58 | MASTER-Amur | (21h 15m 20.07s , +37d 24m 39.1s) | C | 180 | 17.0 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-05-29T13:58:47.447606Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-29T13:58:47.447627Z",
"modified": "2023-05-29T13:58:47.454588Z",
"nonlocalizedevents": [
{
"event_id": "S230529p"
}
],
"targets": []
},
{
"id": 107,
"topic": "igwn.gwalert",
"uuid": "501b0a53-15d1-4d02-a0bb-3f6a76eb3718",
"title": "S230529ay - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230529ay/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230529ay/view/"
},
"event": {
"far": 1.975121185032117e-10,
"time": "2023-05-29T18:15:00.746Z",
"group": "CBC",
"search": "AllSky",
"area_50": 4.297183463481174,
"area_90": 8.594366926962348,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.9847387913344903,
"HasRemnant": 0.12057811461919889
},
"instruments": [
"L1"
],
"significant": true,
"skymap_hash": "27e093b82033277b3693344e16cac52b",
"classification": {
"BBH": 0.0,
"BNS": 0.30601513334446906,
"NSBH": 0.6240278234757632,
"Terrestrial": 0.0699570431797677
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-05-29T18:15:26Z",
"superevent_id": "S230529ay",
"external_coinc": null
},
"message_text": "",
"published": "2023-05-29T18:15:28.627837Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-05-29T18:15:28.627862Z",
"modified": "2023-05-29T18:15:28.634149Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 7631,
"topic": "lvk-users.beccatest",
"uuid": "9cd6cb5e-ddad-491d-b686-d3d03d69c763",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"L1"
],
"time": [
1400452900
],
"range": 166.594238345837
},
"message_text": "",
"published": "2024-05-22T22:41:40.605929Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-22T22:41:40.605949Z",
"modified": "2024-05-22T22:41:40.605957Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 134,
"topic": "igwn.gwalert",
"uuid": "5d1cd20d-99b4-4980-a6eb-0f466492d1ed",
"title": "S230602ap - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230602ap/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230602ap/view/"
},
"event": {
"far": 1.48135e-06,
"time": "2023-06-02T18:40:16.676Z",
"group": "Burst",
"search": "AllSky",
"area_50": 375.16425940939166,
"area_90": 1300.0658564320977,
"duration": 0.035156,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "125fdd996d673615049fb2fe3a7e0359",
"classification": {},
"skymap_version": 0,
"central_frequency": 305.918823
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-06-02T18:46:54Z",
"superevent_id": "S230602ap",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-02T18:46:55.642654Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-02T18:46:55.642677Z",
"modified": "2023-06-02T18:46:55.648690Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 202,
"topic": "igwn.gwalert",
"uuid": "c9d09b3e-3995-4016-a2b1-dcf5da3e7e13",
"title": "S230608aw - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230608aw/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230608aw/view/"
},
"event": {
"far": 2.44363e-06,
"time": "2023-06-08T23:47:27.292Z",
"group": "Burst",
"search": "BBH",
"area_50": 293.75277582390845,
"area_90": 1001.2773187369219,
"duration": 0.044154,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "cd4a40fef4bdc8c4bd4d1e6257189bc1",
"classification": {},
"skymap_version": 0,
"central_frequency": 117.343483
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-06-08T23:53:07Z",
"superevent_id": "S230608aw",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-08T23:53:08.785942Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-08T23:53:08.785963Z",
"modified": "2023-06-08T23:53:08.792676Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 108,
"topic": "igwn.gwalert",
"uuid": "1a876cbb-ec62-4116-874d-c249e9c85c99",
"title": "S230529ay - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230529ay/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230529ay/view/"
},
"event": {
"far": 1.975121185032117e-10,
"time": "2023-05-29T18:15:00.746Z",
"group": "CBC",
"search": "AllSky",
"area_50": 4.297183463481174,
"area_90": 8.594366926962348,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.9847387913344903,
"HasRemnant": 0.12057811461919889
},
"instruments": [
"L1"
],
"significant": true,
"skymap_hash": "27e093b82033277b3693344e16cac52b",
"classification": {
"BBH": 0.0,
"BNS": 0.30601513334446906,
"NSBH": 0.6240278234757632,
"Terrestrial": 0.0699570431797677
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-05-29T18:20:15Z",
"superevent_id": "S230529ay",
"external_coinc": null
},
"message_text": "",
"published": "2023-05-29T18:20:16.316501Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-05-29T18:20:16.316525Z",
"modified": "2023-05-29T18:20:16.321345Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 109,
"topic": "igwn.gwalert",
"uuid": "2270c12b-4e70-4b11-bb87-4e99e41991d5",
"title": "S230529ay - INITIAL",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230529ay/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230529ay/view/"
},
"event": {
"far": 1.975121185032117e-10,
"time": "2023-05-29T18:15:00.746Z",
"group": "CBC",
"search": "AllSky",
"area_50": 4.297183463481174,
"area_90": 8.594366926962348,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.9847387913344903,
"HasRemnant": 0.12057811461919889
},
"instruments": [
"L1"
],
"significant": true,
"skymap_hash": "27e093b82033277b3693344e16cac52b",
"classification": {
"BBH": 0.0,
"BNS": 0.30601513334446906,
"NSBH": 0.6240278234757632,
"Terrestrial": 0.0699570431797677
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "INITIAL",
"sequence_num": 3,
"time_created": "2023-05-29T18:27:30Z",
"superevent_id": "S230529ay",
"external_coinc": null
},
"message_text": "",
"published": "2023-05-29T18:27:32.593681Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-05-29T18:27:32.593707Z",
"modified": "2023-05-29T18:27:32.598636Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 110,
"topic": "hermes.message",
"uuid": "75a5a980-dd01-4f18-9124-3e4fca639d53",
"title": "INTEGRAL follow-up of S230529ay",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230529ay at 2023-05-29T18:15:00.000\n\n\nSPI-ACS excesses:\nat T0+263.21 FAP = 0.225\nat T0+263.21 FAP = 0.225\nat T0+263.21 FAP = 0.225\nat T0+263.21 FAP = 0.225\nat T0+-11.22 FAP = 0.347\nat T0+-5.84 FAP = 0.648\nat T0+-90.52 FAP = 0.751\n\n\n\n\nnext break in data in 22 hr: 2023-05-30T15:45:39, for 9.3 hr",
"published": "2023-05-29T18:29:41.819518Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-05-29T18:29:41.819538Z",
"modified": "2023-05-29T18:29:41.824304Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 111,
"topic": "gcn.circular",
"uuid": "e8a0a53d-f5f1-4f2c-9d28-a64d595a83ef",
"title": "LIGO/Virgo/KAGRA S230529ay: Identification of a GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "J. L. Wright at Australian National University <jennifer.wright@anu.edu.au>",
"data": {
"date": "23/05/29 18:36:00 GMT",
"from": "J. L. Wright at Australian National University <jennifer.wright@anu.edu.au>",
"title": "GCN CIRCULAR",
"number": "33889",
"subject": "LIGO/Virgo/KAGRA S230529ay: 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 S230529ay during\nreal-time processing of data from LIGO Livingston Observatory (L1) at\n2023-05-29 18:15:00.746 UTC (GPS time: 1369419318.746). The candidate\nwas found by the GstLAL [1] and PyCBC Live [2] analysis pipelines.\n\nS230529ay is an event of interest because its false alarm rate, as\nestimated by the online analysis, is 2e-10 Hz, or about one in 1e2\nyears. The event's properties can be found at this URL:\n\nhttps://gracedb.ligo.org/superevents/S230529ay\n\nThe classification of the GW signal, in order of descending\nprobability is NSBH (62%), BNS (31%), Terrestrial (7%), or BBH (<1%).\n\nAssuming the candidate is astrophysical in origin, the probability\nthat the lighter compact object is consistent with a neutron star mass\n(HasNS) is >99%. [3] Using the masses and spins inferred from the\nsignal, the probability of matter outside the final compact object\n(HasRemnant) is 12%. [3] Both HasNS and HasRemnant consider the\nsupport of several neutron star equations of state. The probability\nthat any one of the binary components lie between 3 to 5 solar mass\n(HasMassgap) is 98%.\n\nTwo sky maps are available at this time and can be retrieved from the\nGraceDB event page:\n * bayestar.multiorder.fits,0, an initial localization generated by\nBAYESTAR [4], distributed via GCN notice about 25 seconds after the\ncandidate event time.\n * bayestar.multiorder.fits,1, an initial localization generated by\nBAYESTAR [4], distributed via GCN notice about 5 minutes after the\ncandidate event time.\n\nThe preferred sky map at this time is bayestar.multiorder.fits,1. For\nthe bayestar.multiorder.fits,1 sky map, the 90% credible region is\nwell fit by an ellipse with an area of 31171 deg2 described by the\nfollowing DS9 region (right ascension, declination, semi-major axis,\nsemi-minor axis, position angle of the semi-minor axis):\n icrs; ellipse(00h00m, +00d00m, 163.70d, 97.20d, 147.56d)\nMarginalized over the whole sky, the a posteriori luminosity distance\nestimate is 217 +/- 71 Mpc (a posteriori mean +/- 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\n<https://emfollow.docs.ligo.org/userguide/>.\n\n [1] Tsukada et al. arXiv:2305.06286 (2023) and Ewing et al. arXiv:2305.05625 (2023)\n [2] Dal Canton et al. ApJ 923, 254 (2021)\n [3] Chatterjee et al. The Astrophysical Journal 896, 1 (2020)\n [4] Singer & Price PRD 93, 024013 (2016)\n\n",
"published": "2023-05-29T18:36:12.673072Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-29T18:36:12.673093Z",
"modified": "2023-05-29T18:36:12.678159Z",
"nonlocalizedevents": [
{
"event_id": "S230529a"
}
],
"targets": []
},
{
"id": 112,
"topic": "gcn.circular",
"uuid": "37d855f1-b009-479d-bd98-2a6f6aae55b4",
"title": "LIGO/Virgo/KAGRA S230529ay: No counterpart candidates in INTEGRAL SPI-ACS prompt observation",
"submitter": "Hop gcn.circular",
"authors": "Volodymyr Savchenko at ISDC, University of Geneva; LASTRO, EPFL <volodymyr.savchenko@unige.ch>",
"data": {
"date": "23/05/29 19:14:52 GMT",
"from": "Volodymyr Savchenko at ISDC, University of Geneva; LASTRO, EPFL <volodymyr.savchenko@unige.ch>",
"title": "GCN CIRCULAR",
"number": "33890",
"subject": "LIGO/Virgo/KAGRA S230529ay: No counterpart candidates in INTEGRAL SPI-ACS prompt observation"
},
"message_text": "V. Savchenko, C. Ferrigno (ISDC/UniGE, Switzerland)\nJ. Rodi (IAPS-Roma, Italy)\nA. Coleiro (APC, France)\nS. Mereghetti (INAF IASF-Milano, Italy)\n\non behalf of the INTEGRAL multi-messenger collaboration:\nhttps://www.astro.unige.ch/cdci/integral-multimessenger-collaboration\n\nUsing INTEGRAL/SPI-ACS realtime data (following [1]) we have performed\na search for a prompt gamma-ray counterpart of S230529ay (GCN 33889).\n\nAt the time of the event (2023-05-29 18:15:00 UTC, hereafter T0),\nINTEGRAL was operating in nominal mode. The peak of the event\nlocalization probability was at an angle of 122 deg with respect to\nthe spacecraft pointing axis. This orientation implies strongly\nsuppressed (2.8% of optimal) response of ISGRI, somewhat suppressed\n(57% of optimal) response of IBIS/Veto, and somewhat suppressed (47%\nof optimal) response of SPI-ACS.\n\nThe background within +/-300 seconds around the event was somewhat\nunstable (excess variance 1.8).\nIn addition, we note that excess noise at near Hz frequency has been noted\nin SPI-ACS data in recent days, related to satellite environment conditions.\n\nWe have performed a search for any impulsive events in INTEGRAL SPI-\nACS (as described in [2]) data.\n\nWe do not detect any significant counterparts and estimate a 3-sigma\nupper limit on the 75-2000 keV fluence of 3.4e-07 erg/cm^2 (within the\n50% probability containment region of the source localization) for a\nburst lasting less than 1 s with a characteristic short GRB spectrum\n(an exponentially cut off power law with alpha=-0.5 and Ep`0 keV)\noccurring at any time in the interval within 300 s around T0. For a\ntypical long GRB spectrum (Band function with alpha=-1, beta=-2.5, and\nEp00 keV), the derived peak flux upper limit is ~3.2e-07 (8e-08)\nerg/cm^2/s at 1 s (8 s) time scale in 75-2000 keV energy range.\n\nFor the mean reported distance 217.0 Mpc this corresponds to the limit\non the total isotropic equivalent energy in 1 s of 1.9e+48 erg for\nthe short GRB spectrum and for a long GRB spectrum isotropic\nequivalent luminosity in 1 s (8 s) of 9.4e+47 erg/s (4.5e+47 erg/s)\n\nWe report for completeness and in order of FAP, all excesses\nidentified in the search region. We find: 4 likely background\nexcesses:\n\nT-T0 | scale | S/N | luminosity ( x 1e+48 erg/s) | FAP\n262 | 1.7 | 4.7 | 33.8 +/- 8.3 +/- 30.4 | 0.276\n-12.1 | 0.45 | 3.1 | 3.87 +/- 1.62 +/- 3.48 | 0.498\n-6.59 | 0.1 | 3.3 | 8.42 +/- 3.46 +/- 7.58 | 0.728\n-91.3 | 0.95 | 3.5 | 3.07 +/- 1.11 +/- 2.76 | 0.756\n\nNote that FAP estimates (especially at timescales above 2s) may be\npossibly further affected by enhanced non-stationary local background\nnoise. This list excludes any excesses for which FAP is close to\nunity.\n\n\n\nAll results quoted are preliminary.\n\nThis circular is an official product of the INTEGRAL Multi-Messenger\nteam.\n\nNote that we send GCNs Circulars only when one of the following\nconditions is met: merger contains at least one neutron star, a\nsignificant counterpart is reported.\n\n[1] Savchenko et al. 2017, A&A 603, A46\n[2] Savchenko et al. 2012, A&A 541A, 122S\n\n",
"published": "2023-05-29T19:15:02.123294Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-29T19:15:02.123364Z",
"modified": "2023-05-29T19:15:02.130829Z",
"nonlocalizedevents": [
{
"event_id": "S230529a"
}
],
"targets": []
},
{
"id": 135,
"topic": "igwn.gwalert",
"uuid": "e748e3af-8414-4b7f-8070-9be61fb4d723",
"title": "S230602ap - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230602ap/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230602ap/view/"
},
"event": {
"far": 1.48135e-06,
"time": "2023-06-02T18:40:16.676Z",
"group": "Burst",
"search": "AllSky",
"area_50": 375.16425940939166,
"area_90": 1300.0658564320977,
"duration": 0.035156,
"pipeline": "CWB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "125fdd996d673615049fb2fe3a7e0359",
"classification": {},
"skymap_version": 0,
"central_frequency": 305.918823
},
"alert_type": "PRELIMINARY",
"sequence_num": 2,
"time_created": "2023-06-02T18:51:28Z",
"superevent_id": "S230602ap",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-02T18:51:29.330985Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-02T18:51:29.331008Z",
"modified": "2023-06-02T18:51:29.335948Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 136,
"topic": "hermes.message",
"uuid": "933999b4-29dd-44eb-866c-950a53ffe65f",
"title": "INTEGRAL follow-up of S230602ap",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230602ap at 2023-06-02T18:40:16.000\n\n\nSPI-ACS excesses:\nat T0+-53.85 FAP = 0.031\nat T0+-157.62 FAP = 0.282\nat T0+-58.25 FAP = 0.29\nat T0+-116.07 FAP = 0.455\nat T0+-129.1 FAP = 0.703\nat T0+141.73 FAP = 0.772\nat T0+240.8 FAP = 0.813\nat T0+-39.97 FAP = 0.815\nat T0+-23.02 FAP = 0.988\n\n\n\n\nnext break in data in 53 hr: 2023-06-04T23:26:30, for 9.3 hr",
"published": "2023-06-02T18:52:35.440099Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-02T18:52:35.440118Z",
"modified": "2023-06-02T18:52:35.445017Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 574,
"topic": "hermes.message",
"uuid": "205ffdcf-21a6-4c7c-8090-f91d495a9248",
"title": "INTEGRAL follow-up of S230624j",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230624j at 2023-06-24T03:29:58.000\n\n\nSPI-ACS excesses:\nat T0+-24.78 FAP = 0.129\nat T0+94.27 FAP = 0.219\nat T0+10.57 FAP = 0.274\nat T0+-275.55 FAP = 0.325\nat T0+49.32 FAP = 0.363\nat T0+253.35 FAP = 0.736\nat T0+46.17 FAP = 0.957\n\n\n\n\nnext break in data in 50 hr: 2023-06-26T05:08:21, for 10 hr",
"published": "2023-06-24T15:42:12.034517Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-24T15:42:12.034537Z",
"modified": "2023-06-24T15:42:12.039959Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 203,
"topic": "hermes.message",
"uuid": "99c4afe1-e972-47f5-8613-ccff23be0201",
"title": "INTEGRAL follow-up of S230608aw",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230608aw at 2023-06-08T23:47:27.000\n\n\nSPI-ACS excesses:\nat T0+8.54 FAP = 0.042\nat T0+-34.03 FAP = 0.201\nat T0+1.19 FAP = 0.239\nat T0+26.09 FAP = 0.288\nat T0+81.32 FAP = 0.383\nat T0+107.77 FAP = 0.598\nat T0+60.44 FAP = 0.602\nat T0+250.92 FAP = 0.818\n\n\n\n\nnext break in data in 30 hr: 2023-06-10T06:03:50, for 10 hr",
"published": "2023-06-09T00:00:00.851222Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-09T00:00:00.851257Z",
"modified": "2023-06-09T00:00:00.858447Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 575,
"topic": "hermes.message",
"uuid": "8512c3a2-cdaa-4658-a41f-6113418ac5cc",
"title": "INTEGRAL follow-up of S230623be",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230623be at 2023-06-23T21:04:07.000\n\n\n\n\n\nbreak since 6.6 hr next data in 2.6 hr",
"published": "2023-06-24T15:51:30.073804Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-24T15:51:30.073823Z",
"modified": "2023-06-24T15:51:30.079850Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 576,
"topic": "hermes.message",
"uuid": "4d857e0e-cf74-40fb-9fdf-b54bb3f461b3",
"title": "INTEGRAL follow-up of S230623at",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230623at at 2023-06-23T17:18:09.000\n\n\n\n\n\nbreak since 2.9 hr next data in 6.4 hr",
"published": "2023-06-24T15:52:03.132726Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-24T15:52:03.132745Z",
"modified": "2023-06-24T15:52:03.137817Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 577,
"topic": "hermes.message",
"uuid": "459d8476-cd29-4e0a-8b66-3a15612051f4",
"title": "INTEGRAL follow-up of S230624ax",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230624ax at 2023-06-24T12:14:46.000\n\n\nSPI-ACS excesses:\nat T0+-10.78 FAP = 0.045\nat T0+-27.61 FAP = 0.06\nat T0+23.57 FAP = 0.182\nat T0+79.59 FAP = 0.227\nat T0+-66.03 FAP = 0.926\n\n\n\n\nnext break in data in 41 hr: 2023-06-26T05:08:21, for 10 hr",
"published": "2023-06-24T16:01:05.256943Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-24T16:01:05.256962Z",
"modified": "2023-06-24T16:01:05.261796Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 7632,
"topic": "lvk-users.beccatest",
"uuid": "638db0a9-f28e-4d58-a0a0-1ab03b50964c",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"V1"
],
"time": [
1400452900
],
"range": 45.576089340638454
},
"message_text": "",
"published": "2024-05-22T22:41:46.630837Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-22T22:41:46.630857Z",
"modified": "2024-05-22T22:41:46.630866Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 7633,
"topic": "lvk-users.beccatest",
"uuid": "b9ce2c37-8b5b-4b4f-b4fd-3fd12d86f222",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"H1"
],
"time": [
1400453000
],
"range": 154.05688871939756
},
"message_text": "",
"published": "2024-05-22T22:43:20.016800Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-22T22:43:20.016821Z",
"modified": "2024-05-22T22:43:20.016829Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 113,
"topic": "gcn.circular",
"uuid": "8893843b-07a2-44ae-a5b5-4df25a2a917b",
"title": "LIGO/Virgo/KAGRA S230529ay: Updated Sky localization and EM Bright Classification",
"submitter": "Hop gcn.circular",
"authors": "J. L. Wright at Australian National University <jennifer.wright@anu.edu.au>",
"data": {
"date": "23/05/29 20:03:57 GMT",
"from": "J. L. Wright at Australian National University <jennifer.wright@anu.edu.au>",
"title": "GCN CIRCULAR",
"number": "33891",
"subject": "LIGO/Virgo/KAGRA S230529ay: Updated Sky localization and EM Bright Classification"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the\nKAGRA Collaboration report:\n\nWe have conducted further analysis of the LIGO Livingston Observatory\n(L1) data around the time of the compact binary merger (CBC) candidate\nS230529ay (GCN Circular 33889).\nParameter estimation has been performed using Bilby [1] and a new sky\nmap, Bilby.multiorder.fits,0, distributed via GCN Notice, is available\nfor retrieval from the GraceDB event page:\n\nhttps://gracedb.ligo.org/superevents/S230529ay\n\nBased on posterior support from parameter estimation [1], under the\nassumption that the candidate S230529ay is astrophysical in origin,the\nprobability that the lighter compact object is consistent with a\nneutron star mass (HasNS) is 98%. [2] Using the masses and spins\ninferred from the signal, the probability of matter outside the final\ncompact object (HasRemnant) is 1%. [2] Both HasNS and HasRemnant\nconsider the support of several neutron star equations of state. The\nprobability that any one of the binary components lie between 3 to 5\nsolar mass (HasMassgap) is 69%.\n\nFor the Bilby.multiorder.fits,0 sky map, the 90% credible region is\n25623 deg2. Marginalized over the whole sky, the a posteriori\nluminosity distance estimate is 201 +/- 63 Mpc (a posteriori mean +/-\nstandard deviation).\n\nFor further information about analysis methodology and the contents of\nthis alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide\n<https://emfollow.docs.ligo.org/userguide/>.\n\n\n [1] Ashton et al. ApJS 241, 27 (2019)\n [2] Chatterjee et al. The Astrophysical Journal 896, 1 (2020)\n\n",
"published": "2023-05-29T20:04:05.856187Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-29T20:04:05.856223Z",
"modified": "2023-05-29T20:04:05.863455Z",
"nonlocalizedevents": [
{
"event_id": "S230529a"
}
],
"targets": []
},
{
"id": 114,
"topic": "gcn.circular",
"uuid": "f2a50fca-3cac-4c54-8471-cec7cd4a4e1c",
"title": "LIGO/Virgo/KAGRA S230529ay: Upper limits from Fermi-GBM Observations",
"submitter": "Hop gcn.circular",
"authors": "Stephen Lesage at Fermi-GBM Team <sjl0014@uah.edu>",
"data": {
"date": "23/05/30 01:55:30 GMT",
"from": "Stephen Lesage at Fermi-GBM Team <sjl0014@uah.edu>",
"title": "GCN CIRCULAR",
"number": "33892",
"subject": "LIGO/Virgo/KAGRA S230529ay: Upper limits from Fermi-GBM Observations"
},
"message_text": "S. Lesage (UAH) reports on behalf of the Fermi-GBM Team and the GBM-LIGO/Virgo/KAGRA group\n\nFor S230529ay (GCN 33889 and GCN 33891) and using the Bilby skymap, Fermi-GBM was observing 60.7% of the localization probability at event time.\n\nThere was no Fermi-GBM onboard trigger around the event time of the LIGO/Virgo/KAGRA (LVK) detection of GW trigger S230529ay. An automated, blind search for short gamma-ray bursts below the onboard triggering threshold in Fermi-GBM also identified no counterpart candidates. The GBM targeted search, the most sensitive, coherent search for GRB-like signals, was run from +/-30 s around merger time, and also identified no counterpart candidates.\n\nPart of the LVK localization region is behind the Earth for Fermi, located at an RA1.5, Dec#.9 with a radius of 67.6 degrees. We therefore set upper limits on impulsive gamma-ray emission for the GW localization region visible to Fermi at merger time. Using the representative soft, normal, and hard GRB-like templates described in arXiv:1612.02395, we set the following 3 sigma flux upper limits over 10-1000 keV, weighted by GW localization probability (in units of 10^-7 erg/s/cm^2):\n\nTimescale Soft Normal Hard\n------------------------------------\n0.128 s: 1.2 1.9 3.5\n1.024 s: 0.5 0.7 1.2\n8.192 s: 0.2 0.2 0.4\n\nAssuming the median luminosity distance of 200.6 Mpc from the GW detection, we estimate the following intrinsic luminosity upper limits over the 1 keV-10 MeV energy range (in units of 10^50 erg/s):\n\nTimescale Soft Normal Hard\n------------------------------------\n0.128s: 0.009 0.013 0.039\n1.024s: 0.003 0.005 0.013\n8.192s: 0.001 0.002 0.005\n\n",
"published": "2023-05-30T01:55:39.553047Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-30T01:55:39.553068Z",
"modified": "2023-05-30T01:55:39.559630Z",
"nonlocalizedevents": [
{
"event_id": "S230529a"
}
],
"targets": []
},
{
"id": 153,
"topic": "igwn.gwalert",
"uuid": "32d2ad54-7826-442f-a63d-c70d47edfd4b",
"title": "S230605o - INITIAL",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230605o/files/bayestar.multiorder.fits,1",
"gracedb": "https://gracedb.ligo.org/superevents/S230605o/view/"
},
"event": {
"far": 4.521287e-09,
"time": "2023-06-05T06:53:43.493Z",
"group": "CBC",
"search": "AllSky",
"area_50": 402.75603799570877,
"area_90": 1370.3566992185326,
"duration": null,
"pipeline": "MBTA",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.0,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "7d4bfe7c9df8179abf766db83844b646",
"classification": {
"BBH": 0.98770478,
"BNS": 0.0,
"NSBH": 0.0,
"Terrestrial": 0.01229522
},
"skymap_version": 1,
"central_frequency": null
},
"alert_type": "INITIAL",
"sequence_num": 3,
"time_created": "2023-06-05T07:09:54Z",
"superevent_id": "S230605o",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-05T07:09:55.492512Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-05T07:09:55.492548Z",
"modified": "2023-06-05T07:09:55.497720Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 154,
"topic": "gcn.circular",
"uuid": "473bf297-2887-48bc-834e-20c7530293a3",
"title": "LIGO/Virgo/KAGRA S230605o: Identification of a GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "lucia.papalini@phd.unipi.it",
"data": {
"date": "23/06/05 07:20:47 GMT",
"from": "lucia.papalini@phd.unipi.it",
"title": "GCN CIRCULAR",
"number": "33914",
"subject": "LIGO/Virgo/KAGRA S230605o: 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 S230605o during\nreal-time processing of data from LIGO Hanford Observatory (H1) and\nLIGO Livingston Observatory (L1) at 2023-06-05 06:53:43.494 UTC (GPS\ntime: 1369983241.494). The candidate was found by the MBTA [1], GstLAL\n[2], PyCBC Live [3], and SPIIR [4] analysis pipelines.\n\nS230605o is an event of interest because its false alarm rate, as\nestimated by the online analysis, is 4.5e-09 Hz, or about one in 7\nyears. The event's properties can be found at this URL:\n\nhttps://gracedb.ligo.org/superevents/S230605o\n\nThe classification of the GW signal, in order of descending\nprobability, is BBH (99%), Terrestrial (1%), BNS (<1%), or NSBH (<1%).\n\nAssuming the candidate is astrophysical in origin, the probability\nthat the lighter compact object is consistent with a neutron star mass\n(HasNS) is <1%. [5] Using the masses and spins inferred from the\nsignal, the probability of matter outside the final compact object\n(HasRemnant) is <1%. [5] Both HasNS and HasRemnant consider the\nsupport of several neutron star equations of state. The probability\nthat any one of the binary components lie between 3 to 5 solar mass\n(HasMassgap) is <1%.\n\nTwo sky maps are available at this time and can be retrieved from the\nGraceDB event page:\n * bayestar.multiorder.fits,0, an initial localization generated by\nBAYESTAR [6], distributed via GCN notice about 22 seconds after the\ncandidate event time.\n * bayestar.multiorder.fits,1, an initial localization generated by\nBAYESTAR [6], distributed via GCN notice about 4 minutes after the\ncandidate event time.\n\nThe preferred sky map at this time is bayestar.multiorder.fits,1. For\nthe bayestar.multiorder.fits,1 sky map, the 90% credible region is\n1370 deg2. Marginalized over the whole sky, the a posteriori\nluminosity distance estimate is 1096 +/- 333 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\n<https://emfollow.docs.ligo.org/userguide/>.\n\n [1] Aubin et al. CQG 38, 095004 (2021)\n [2] Tsukada et al. arXiv:2305.06286 (2023) and Ewing et al.\narXiv:2305.05625 (2023)\n [3] Dal Canton et al. ApJ 923, 254 (2021)\n [4] Chu et al. PRD 105, 024023 (2022)\n [5] Chatterjee et al. ApJ 896, 54 (2020)\n [6] Singer & Price PRD 93, 024013 (2016)\n\n",
"published": "2023-06-05T07:20:56.776652Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-06-05T07:20:56.776681Z",
"modified": "2023-06-05T07:20:56.782181Z",
"nonlocalizedevents": [
{
"event_id": "S230605o"
}
],
"targets": []
},
{
"id": 578,
"topic": "hermes.message",
"uuid": "15787215-f7f8-4b21-9da3-e5e6e16f27d1",
"title": "INTEGRAL follow-up of S230624ae",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230624ae at 2023-06-24T07:29:02.000\n\n\nSPI-ACS excesses:\nat T0+-1.74 FAP = 0.011\nat T0+0.43 FAP = 0.038\nat T0+-6.92 FAP = 0.124\nat T0+112.16 FAP = 0.235\nat T0+2.23 FAP = 0.239\nat T0+76.31 FAP = 0.347\nat T0+-204.42 FAP = 0.354\nat T0+22.93 FAP = 0.492\nat T0+94.38 FAP = 0.498\n\n\n\n\nnext break in data in 46 hr: 2023-06-26T05:08:21, for 10 hr",
"published": "2023-06-24T16:13:46.880990Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-24T16:13:46.881009Z",
"modified": "2023-06-24T16:13:46.886147Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 579,
"topic": "hermes.message",
"uuid": "2b8d347b-9356-4e66-8e3b-0bb0b6e10f4c",
"title": "INTEGRAL follow-up of S230623as",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230623as at 2023-06-23T17:18:05.000\n\n\n\n\n\nbreak since 2.9 hr next data in 6.4 hr",
"published": "2023-06-24T16:26:46.670103Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-24T16:26:46.670122Z",
"modified": "2023-06-24T16:26:46.675367Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 2875,
"topic": "gcn.circular",
"uuid": "4d8c0e60-46a1-46f4-9a24-2fc95e350a12",
"title": "Fermi trigger No 716145795: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/09/11 19:30:44 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "34663",
"subject": "Fermi trigger No 716145795: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko,\nG.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gress, N.M. Budnev, O.Ershova\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,\nA.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nV. Yurkov, A. Gabovich\n(Blagoveschensk Educational State University)\n\nMASTER-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB230911.72 (trigger No 716145795,13h 20m 04.08s , +22d 45m 00.0s, R\".5) errorbox 3923 sec after notice time and 3931 sec after trigger time at 2023-09-11 18:28:41 UT, with upper limit up to 17.9 mag. The observations began at zenith distance = 76 deg. The sun altitude is -30.4 deg.\n\nThe galactic latitude b = 82 deg., longitude l = 1 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"69059\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 3961 | 2023-09-11 18:28:41 | MASTER-Kislovodsk | (13h 19m 18.50s , +39d 25m 08.4s) | C | 60 | 17.7 |\n 4041 | 2023-09-11 18:30:02 | MASTER-Kislovodsk | (12h 59m 41.52s , +39d 25m 54.4s) | C | 60 | 16.1 |\n 4288 | 2023-09-11 18:34:08 | MASTER-Kislovodsk | (13h 25m 13.11s , +43d 14m 08.8s) | C | 60 | 17.6 |\n 4368 | 2023-09-11 18:35:28 | MASTER-Kislovodsk | (13h 08m 27.03s , +45d 08m 27.7s) | C | 60 | 17.5 |\n 4448 | 2023-09-11 18:36:48 | MASTER-Kislovodsk | (13h 30m 00.25s , +45d 08m 12.0s) | C | 60 | 17.3 |\n 4608 | 2023-09-11 18:39:28 | MASTER-Kislovodsk | (13h 51m 25.36s , +45d 08m 03.0s) | C | 60 | 17.9 |\n 4689 | 2023-09-11 18:40:49 | MASTER-Kislovodsk | (13h 46m 02.67s , +43d 15m 33.9s) | C | 60 | 17.8 |\n 4769 | 2023-09-11 18:42:09 | MASTER-Kislovodsk | (13h 35m 50.37s , +47d 01m 21.6s) | C | 60 | 17.8 |\n 5121 | 2023-09-11 18:48:01 | MASTER-Kislovodsk | (13h 29m 54.06s , +45d 08m 47.8s) | C | 60 | 17.3 |\n 5282 | 2023-09-11 18:50:42 | MASTER-Kislovodsk | (13h 56m 41.44s , +44d 46m 59.4s) | C | 60 | 14.6 |\n 5282 | 2023-09-11 18:50:42 | MASTER-Kislovodsk | (13h 51m 20.77s , +45d 07m 29.8s) | C | 60 | 17.5 |\n 5362 | 2023-09-11 18:52:02 | MASTER-Kislovodsk | (13h 46m 07.06s , +43d 13m 41.8s) | C | 60 | 17.6 |\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.eyJlbWFpbCI6ImdjbmNpcmN1bGFyQGRldi5ob3Auc2NpbW1hLm9yZyIsInRvcGljcyI6WyJjaXJjdWxhcnMiXSwiaWF0IjoxNjk0NDYwNjQ5LCJpc3MiOiJodHRwczovL2djbi5uYXNhLmdvdiJ9.5KRy0BTvLtVNOePIPetAsb6iurBfbP2mu2FR_Ia8d-s\n\n",
"published": "2023-09-11T19:31:01.198061Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-09-11T19:31:01.198081Z",
"modified": "2023-09-11T19:31:01.205325Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 637,
"topic": "igwn.gwalert",
"uuid": "0b3f541e-2f83-46d8-9da1-62fd628bb9f4",
"title": "S230626ad - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230626ad/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230626ad/view/"
},
"event": {
"far": 9.4084397878484e-07,
"time": "2023-06-26T06:07:13.188Z",
"group": "Burst",
"search": "AllSky",
"area_50": 1764.4050656451757,
"area_90": 7577.143028966416,
"duration": 0.1627545195642458,
"pipeline": "oLIB",
"properties": {},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "16dda5ed9cb79af5467b7dc85d584634",
"classification": {},
"skymap_version": 0,
"central_frequency": 40.32842894344215
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-06-26T06:22:37Z",
"superevent_id": "S230626ad",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-26T06:22:38.464885Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-26T06:22:38.464910Z",
"modified": "2023-06-26T06:22:38.471763Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 638,
"topic": "hermes.message",
"uuid": "bf05a0fb-44ce-4c75-bb72-80fd7475283c",
"title": "INTEGRAL follow-up of S230626ad",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230626ad at 2023-06-26T06:07:13.000\n\n\n\n\n\nbreak since 0.98 hr next data in 9.4 hr",
"published": "2023-06-26T06:23:11.542176Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-26T06:23:11.542210Z",
"modified": "2023-06-26T06:23:11.547566Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 7634,
"topic": "lvk-users.beccatest",
"uuid": "aaa57d77-8c95-42d6-af5c-0fc48c5d33a4",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"L1"
],
"time": [
1400453000
],
"range": 167.13212308276468
},
"message_text": "",
"published": "2024-05-22T22:43:20.029416Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-22T22:43:20.029435Z",
"modified": "2024-05-22T22:43:20.029442Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 115,
"topic": "gcn.circular",
"uuid": "95424ed6-aa85-4adf-9a25-1a1bca7167fe",
"title": "LIGO/Virgo/KAGRA S230529ay: Coverage and upper limits from MAXI/GSC observations",
"submitter": "Hop gcn.circular",
"authors": "Motoko Serino at Aoyama Gakuin U. <serino@phys.aoyama.ac.jp>",
"data": {
"date": "23/05/30 05:13:28 GMT",
"from": "Motoko Serino at Aoyama Gakuin U. <serino@phys.aoyama.ac.jp>",
"title": "GCN CIRCULAR",
"number": "33893",
"subject": "LIGO/Virgo/KAGRA S230529ay: Coverage and upper limits from MAXI/GSC observations"
},
"message_text": "S. Sugita, M. Serino (AGU),\nH. Negoro (Nihon U.),\nN. Kawai (RIKEN),\nM. Nakajima, K. Kobayashi, M. Tanaka, Y. Soejima, Y. Kudo (Nihon U.),\nT. Mihara, T. Kawamuro, S. Yamada, T. Tamagawa, M. Matsuoka (RIKEN),\nT. Sakamoto, H. Hiramatsu, H. Nishikawa, A. Yoshida (AGU),\nY. Tsuboi, S. Urabe, S. Nawa, N. Nemoto (Chuo U.),\nM. Shidatsu (Ehime U.),\nI. Takahashi, M. Niwano, S. Sato, N. Higuchi, Y. Yatsu (Tokyo Tech),\nS. Nakahira, S. Ueno, H. Tomida, M. Ishikawa, S. Ogawa, T. Kurihara (JAXA),\nY. Ueda, K. Setoguchi, T. Yoshitake, Y. Nakatani (Kyoto U.),\nM. Yamauchi, Y. Hagiwara, Y. Umeki, Y. Otsuki (Miyazaki U.),\nK. Yamaoka (Nagoya U.),\nY. Kawakubo (LSU),\nM. Sugizaki (NAOC),\nW. Iwakiri (Chiba U.)\nreport on behalf of the MAXI team:\n\nWe examined MAXI/GSC all-sky X-ray images (2-20 keV)\nafter the compact binary merger candidate S230529ay at 2023-05-29 18:15:00.746 UTC (GCN 33889).\n\nAt the trigger time of S230529ay, the high-voltage of MAXI/GSC was off\nThe first one-orbit (92 min) scan observation with GSC after the event covered 91%\nof the 90% credible region of the Bilby skymap (GCN 33891) from 18:31:41 to 19:40:39 UTC (T0+1001 to T0+5139 sec).\n\nNo significant new source was found in the region in the one-orbit scan observation.\nA typical 1-sigma averaged upper limit obtained in one scan observation\nis 20 mCrab at 2-20 keV.\n\nIf you require information about X-ray flux by MAXI/GSC at specific coordinates,\nplease contact the submitter of this circular by email.\n\n",
"published": "2023-05-30T05:13:36.251141Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-30T05:13:36.251162Z",
"modified": "2023-05-30T05:13:36.257395Z",
"nonlocalizedevents": [
{
"event_id": "S230529a"
}
],
"targets": []
},
{
"id": 116,
"topic": "gcn.circular",
"uuid": "917e2495-3ecd-4bef-8c4f-346bcad37d5e",
"title": "LIGO/Virgo/KAGRA S230529ay: upper limits from AGILE/MCAL",
"submitter": "Hop gcn.circular",
"authors": "Francesco Verrecchia at SSDC,INAF-OAR <francesco.verrecchia@ssdc.asi.it>",
"data": {
"date": "23/05/30 08:00:31 GMT",
"from": "Francesco Verrecchia at SSDC,INAF-OAR <francesco.verrecchia@ssdc.asi.it>",
"title": "GCN CIRCULAR",
"number": "33894",
"subject": "LIGO/Virgo/KAGRA S230529ay: upper limits from AGILE/MCAL"
},
"message_text": "F. Longo (Univ. Trieste, and INFN Trieste), M. Tavani (INAF/IAPS,\nand Univ. Roma Tor Vergata), F. Verrecchia, C. Pittori (SSDC, and\nINAF/OAR), M. Cardillo, C. Casentini, L. Foffano, G. Piano (INAF/IAPS),\nA. Ursi (ASI and INAF/IAPS), F. Lucarelli (SSDC, and INAF/OAR),\nL. Baroncelli, A. Bulgarelli, A. Ciabattoni, A. Di Piano, V.\nFioretti, G. Panebianco, N. Parmiggiani (INAF/OAS-Bologna), M.\nPilia (INAF/OA-Cagliari), report on behalf of the AGILE Team:\n\nIn response to the LIGO/Virgo/KAGRA GW event S230529y at\nT0 = 2023-05-29 18:15:00.89 (UT), a preliminary analysis of the\nAGILE minicalorimeter (MCAL) triggered data found no event candidates\nwithin a time interval covering -/+ 15 sec from the LIGO/Virgo/KAGRA T0.\n\nAt the T0, about 60% of the S230529y 90% c.l. localization region\nwas accessible to the AGILE/MCAL.\n\nThree-sigma upper limits (ULs) are obtained for a 1 s integration\ntime at different celestial positions within the accessible S230529y\nlocalization region in the energy range 0.4-1 MeV, from a minimum\nof 1.5E-06 erg cm^-2 to a maximum of 3.1E-06 erg cm^-2 (assuming as\nspectral model a single power-law with photon index 1.5).\n\nAn independent procedure based on photon counting statistics provides\nUL fluences in the same band, from a minimum of 1.1E-08 erg cm^-2\nto a maximum of 2.1E-08 erg cm^-2.\n\nThe AGILE/MCAL detector is a CsI detector with a 4 pi FoV, sensitive\nin the energy range 0.4-100 MeV. Additional analysis of AGILE data\nis in progress.\n\n",
"published": "2023-05-30T08:00:40.745660Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-30T08:00:40.745681Z",
"modified": "2023-05-30T08:00:40.752036Z",
"nonlocalizedevents": [
{
"event_id": "S230529a"
}
],
"targets": []
},
{
"id": 117,
"topic": "gcn.circular",
"uuid": "6f458032-3e36-4fd8-8c82-87ff2c8f1bb5",
"title": "LIGO/Virgo S230529ay: 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": "23/05/30 08:50:55 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"title": "GCN CIRCULAR",
"number": "33895",
"subject": "LIGO/Virgo S230529ay: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,\nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov\n(Blagoveschensk Educational State University)\n\n\nMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230529ay errorbox 35464 sec after notice time and 35512 sec after trigger time at 2023-05-30 04:06:52 UT, with upper limit up to 20.0 mag. The observations began at zenith distance = 44 deg. The sun altitude is -79.1 deg.\n\nThe galactic latitude b = 10 deg., longitude l = 351 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id\u0011912\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 35602 | 2023-05-30 04:06:52 | MASTER-OAFA | (19h 30m 28.49s , -54d 33m 15.6s) | C | 180 | 17.5 |\n 35782 | 2023-05-30 04:06:52 | MASTER-OAFA | (19h 30m 28.48s , -54d 33m 15.6s) | C | 540 | 17.7 | Coadd\n 35802 | 2023-05-30 04:10:11 | MASTER-OAFA | (19h 44m 00.85s , -54d 34m 42.6s) | C | 180 | 17.3 |\n 35982 | 2023-05-30 04:10:11 | MASTER-OAFA | (19h 44m 00.85s , -54d 34m 42.7s) | C | 540 | 17.1 | Coadd\n 36001 | 2023-05-30 04:13:31 | MASTER-OAFA | (19h 01m 09.49s , -56d 46m 37.5s) | C | 180 | 16.5 |\n 36201 | 2023-05-30 04:16:50 | MASTER-OAFA | (19h 15m 33.95s , -56d 48m 33.1s) | C | 180 | 16.7 |\n 36400 | 2023-05-30 04:20:10 | MASTER-OAFA | (19h 30m 28.92s , -54d 32m 13.8s) | C | 180 | 17.1 |\n 36605 | 2023-05-30 04:23:34 | MASTER-OAFA | (19h 44m 00.34s , -54d 33m 38.6s) | C | 180 | 16.1 |\n 36804 | 2023-05-30 04:26:54 | MASTER-OAFA | (19h 01m 08.06s , -56d 46m 09.6s) | C | 180 | 16.1 |\n 37004 | 2023-05-30 04:30:13 | MASTER-OAFA | (19h 15m 38.21s , -56d 47m 39.9s) | C | 180 | 15.3 |\n 37203 | 2023-05-30 04:33:33 | MASTER-OAFA | (19h 30m 23.62s , -54d 34m 09.8s) | C | 180 | 16.6 |\n 37404 | 2023-05-30 04:36:54 | MASTER-OAFA | (19h 44m 06.81s , -54d 34m 15.8s) | C | 180 | 14.3 |\n 38403 | 2023-05-30 04:53:33 | MASTER-OAFA | (19h 01m 07.43s , -56d 48m 08.9s) | C | 180 | 12.2 |\n 38583 | 2023-05-30 04:53:33 | MASTER-OAFA | (19h 01m 07.47s , -56d 48m 09.0s) | C | 540 | 17.0 | Coadd\n 38603 | 2023-05-30 04:56:52 | MASTER-OAFA | (19h 15m 38.31s , -56d 48m 36.1s) | C | 180 | 13.6 |\n 38802 | 2023-05-30 05:00:12 | MASTER-OAFA | (19h 30m 28.11s , -54d 32m 28.0s) | C | 180 | 15.6 |\n 38982 | 2023-05-30 05:00:12 | MASTER-OAFA | (19h 30m 28.13s , -54d 32m 28.0s) | C | 540 | 17.4 | Coadd\n 39002 | 2023-05-30 05:03:31 | MASTER-OAFA | (19h 44m 05.53s , -54d 34m 27.1s) | C | 180 | 16.8 |\n 39201 | 2023-05-30 05:06:51 | MASTER-OAFA | (19h 01m 14.67s , -56d 46m 26.1s) | C | 180 | 16.9 |\n 39600 | 2023-05-30 05:13:30 | MASTER-OAFA | (19h 30m 26.22s , -54d 32m 07.7s) | C | 180 | 17.4 |\n 39800 | 2023-05-30 05:16:49 | MASTER-OAFA | (19h 44m 09.80s , -54d 33m 33.8s) | C | 180 | 18.4 |\n 40000 | 2023-05-30 05:20:09 | MASTER-OAFA | (19h 01m 09.23s , -56d 48m 12.2s) | C | 180 | 17.0 |\n 40199 | 2023-05-30 05:23:28 | MASTER-OAFA | (19h 15m 39.38s , -56d 48m 21.4s) | C | 180 | 17.5 |\n 40379 | 2023-05-30 05:23:28 | MASTER-OAFA | (19h 15m 39.38s , -56d 48m 21.3s) | C | 540 | 18.0 | Coadd\n 40439 | 2023-05-30 05:27:29 | MASTER-OAFA | (19h 30m 29.31s , -54d 34m 02.2s) | C | 180 | 17.3 |\n 40459 | 2023-05-30 05:27:48 | MASTER-OAFA | (19h 01m 10.37s , -56d 46m 13.3s) | C | 180 | 17.9 |\n 40658 | 2023-05-30 05:31:08 | MASTER-OAFA | (19h 15m 40.91s , -56d 47m 41.2s) | C | 180 | 18.0 |\n 40858 | 2023-05-30 05:34:27 | MASTER-OAFA | (18h 44m 35.92s , -54d 32m 44.0s) | C | 180 | 18.4 |\n 41107 | 2023-05-30 05:38:37 | MASTER-OAFA | (18h 58m 10.02s , -54d 31m 38.1s) | C | 180 | 17.6 |\n 41127 | 2023-05-30 05:38:56 | MASTER-OAFA | (19h 44m 10.12s , -54d 32m 51.9s) | C | 180 | 17.1 |\n 41347 | 2023-05-30 05:42:36 | MASTER-OAFA | (19h 01m 10.04s , -56d 47m 16.0s) | C | 180 | 17.4 |\n 41566 | 2023-05-30 05:46:16 | MASTER-OAFA | (19h 15m 36.26s , -56d 46m 41.8s) | C | 180 | 15.8 |\n 41869 | 2023-05-30 05:51:19 | MASTER-OAFA | (18h 44m 30.25s , -54d 30m 46.4s) | C | 180 | 16.1 |\n 42049 | 2023-05-30 05:51:19 | MASTER-OAFA | (18h 44m 30.24s , -54d 30m 46.4s) | C | 540 | 18.3 | Coadd\n 42124 | 2023-05-30 05:55:34 | MASTER-OAFA | (18h 58m 06.98s , -54d 31m 10.7s) | C | 180 | 17.7 |\n 42304 | 2023-05-30 05:55:34 | MASTER-OAFA | (18h 58m 06.96s , -54d 31m 10.7s) | C | 540 | 19.0 | Coadd\n 42344 | 2023-05-30 05:59:13 | MASTER-OAFA | (19h 30m 33.38s , -54d 33m 08.8s) | C | 180 | 16.5 |\n 42564 | 2023-05-30 06:02:54 | MASTER-OAFA | (19h 44m 05.20s , -54d 34m 32.2s) | C | 180 | 17.8 |\n 42955 | 2023-05-30 06:09:24 | MASTER-OAFA | (19h 01m 18.55s , -56d 48m 07.4s) | C | 180 | 16.9 |\n 43020 | 2023-05-30 06:10:30 | MASTER-OAFA | (18h 44m 35.08s , -54d 32m 23.2s) | C | 180 | 17.5 |\n 43239 | 2023-05-30 06:14:09 | MASTER-OAFA | (18h 58m 14.61s , -54d 31m 13.0s) | C | 180 | 18.6 |\n 43459 | 2023-05-30 06:17:48 | MASTER-OAFA | (18h 44m 33.23s , -54d 30m 50.7s) | C | 180 | 18.6 |\n 43678 | 2023-05-30 06:21:28 | MASTER-OAFA | (18h 58m 15.00s , -54d 32m 15.5s) | C | 180 | 18.7 |\n 43944 | 2023-05-30 06:25:54 | MASTER-OAFA | (18h 44m 39.81s , -54d 31m 52.1s) | C | 180 | 18.7 |\n 44124 | 2023-05-30 06:25:54 | MASTER-OAFA | (18h 44m 39.81s , -54d 31m 52.1s) | C | 540 | 19.3 | Coadd\n 44164 | 2023-05-30 06:29:33 | MASTER-OAFA | (18h 58m 10.72s , -54d 33m 09.7s) | C | 180 | 18.7 |\n 44344 | 2023-05-30 06:29:33 | MASTER-OAFA | (18h 58m 10.72s , -54d 33m 09.7s) | C | 540 | 19.4 | Coadd\n 44383 | 2023-05-30 06:33:13 | MASTER-OAFA | (18h 44m 39.91s , -54d 32m 09.9s) | C | 180 | 18.8 |\n 44603 | 2023-05-30 06:36:52 | MASTER-OAFA | (18h 58m 14.62s , -54d 31m 16.5s) | C | 180 | 18.8 |\n 44822 | 2023-05-30 06:40:31 | MASTER-OAFA | (18h 44m 38.06s , -54d 32m 26.4s) | C | 180 | 18.8 |\n 45087 | 2023-05-30 06:44:56 | MASTER-OAFA | (18h 58m 11.48s , -54d 30m 50.1s) | C | 180 | 18.8 |\n 45306 | 2023-05-30 06:48:36 | MASTER-OAFA | (18h 44m 41.94s , -54d 31m 29.9s) | C | 180 | 18.9 |\n 45526 | 2023-05-30 06:52:15 | MASTER-OAFA | (18h 58m 12.89s , -54d 32m 53.1s) | C | 180 | 18.9 |\n 45745 | 2023-05-30 06:55:55 | MASTER-OAFA | (18h 44m 43.01s , -54d 32m 04.3s) | C | 180 | 18.9 |\n 45965 | 2023-05-30 06:59:35 | MASTER-OAFA | (18h 58m 16.26s , -54d 31m 06.3s) | C | 180 | 18.9 |\n 46185 | 2023-05-30 07:03:14 | MASTER-OAFA | (21h 07m 49.25s , -43d 19m 29.1s) | C | 180 | 19.0 |\n 46365 | 2023-05-30 07:03:14 | MASTER-OAFA | (21h 07m 49.24s , -43d 19m 29.1s) | C | 540 | 19.7 | Coadd\n 46412 | 2023-05-30 07:07:01 | MASTER-OAFA | (21h 18m 37.52s , -43d 20m 22.6s) | C | 180 | 19.1 |\n 46592 | 2023-05-30 07:07:01 | MASTER-OAFA | (21h 18m 37.52s , -43d 20m 22.6s) | C | 540 | 19.8 | Coadd\n 46632 | 2023-05-30 07:10:41 | MASTER-OAFA | (21h 05m 33.17s , -47d 50m 06.3s) | C | 180 | 19.2 |\n 46812 | 2023-05-30 07:10:41 | MASTER-OAFA | (21h 05m 33.17s , -47d 50m 06.3s) | C | 540 | 19.9 | Coadd\n 46851 | 2023-05-30 07:14:21 | MASTER-OAFA | (21h 17m 14.87s , -47d 51m 22.5s) | C | 180 | 19.1 |\n 47031 | 2023-05-30 07:14:21 | MASTER-OAFA | (21h 17m 14.88s , -47d 51m 22.5s) | C | 540 | 19.9 | Coadd\n 47071 | 2023-05-30 07:18:01 | MASTER-OAFA | (21h 07m 49.44s , -43d 20m 57.2s) | C | 180 | 19.2 |\n 47291 | 2023-05-30 07:21:40 | MASTER-OAFA | (21h 18m 41.65s , -43d 19m 49.5s) | C | 180 | 19.1 |\n 47510 | 2023-05-30 07:25:20 | MASTER-OAFA | (21h 05m 30.21s , -47d 50m 58.9s) | C | 180 | 19.2 |\n 47730 | 2023-05-30 07:29:00 | MASTER-OAFA | (21h 17m 21.25s , -47d 49m 32.0s) | C | 180 | 19.1 |\n 47955 | 2023-05-30 07:32:44 | MASTER-OAFA | (21h 07m 44.55s , -43d 20m 09.8s) | C | 180 | 19.3 |\n 48178 | 2023-05-30 07:36:28 | MASTER-OAFA | (21h 18m 38.89s , -43d 19m 23.4s) | C | 180 | 19.1 |\n 48382 | 2023-05-30 07:39:51 | MASTER-OAFA | (21h 05m 34.34s , -47d 50m 09.6s) | C | 180 | 19.2 |\n 48581 | 2023-05-30 07:43:11 | MASTER-OAFA | (21h 17m 15.72s , -47d 51m 25.2s) | C | 180 | 19.2 |\n 48810 | 2023-05-30 07:47:00 | MASTER-OAFA | (21h 07m 47.95s , -43d 19m 33.3s) | C | 180 | 19.3 |\n 48990 | 2023-05-30 07:47:00 | MASTER-OAFA | (21h 07m 47.95s , -43d 19m 33.3s) | C | 540 | 20.0 | Coadd\n 49030 | 2023-05-30 07:50:39 | MASTER-OAFA | (21h 18m 42.68s , -43d 21m 22.8s) | C | 180 | 19.2 |\n 49210 | 2023-05-30 07:50:39 | MASTER-OAFA | (21h 18m 42.68s , -43d 21m 22.9s) | C | 540 | 19.9 | Coadd\n 49249 | 2023-05-30 07:54:19 | MASTER-OAFA | (21h 05m 27.48s , -47d 50m 12.3s) | C | 180 | 19.2 |\n 49456 | 2023-05-30 07:57:45 | MASTER-OAFA | (21h 17m 16.41s , -47d 49m 26.9s) | C | 180 | 19.3 |\n 49655 | 2023-05-30 08:01:05 | MASTER-OAFA | (21h 07m 51.38s , -43d 20m 14.2s) | C | 180 | 19.3 |\n 49855 | 2023-05-30 08:04:24 | MASTER-OAFA | (21h 18m 40.24s , -43d 21m 27.2s) | C | 180 | 19.2 |\n 50054 | 2023-05-30 08:07:44 | MASTER-OAFA | (21h 05m 34.85s , -47d 51m 06.0s) | C | 180 | 19.1 |\n 50254 | 2023-05-30 08:11:03 | MASTER-OAFA | (21h 17m 20.16s , -47d 49m 32.0s) | C | 180 | 18.3 |\n 50473 | 2023-05-30 08:14:43 | MASTER-OAFA | (21h 07m 48.91s , -43d 21m 05.2s) | C | 180 | 19.2 |\n 50693 | 2023-05-30 08:18:22 | MASTER-OAFA | (21h 18m 46.84s , -43d 19m 37.9s) | C | 180 | 19.1 |\n 50919 | 2023-05-30 08:22:09 | MASTER-OAFA | (17h 58m 36.70s , -30d 31m 04.3s) | C | 180 | 16.2 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n",
"published": "2023-05-30T08:51:03.888378Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-30T08:51:03.888401Z",
"modified": "2023-05-30T08:51:03.895512Z",
"nonlocalizedevents": [
{
"event_id": "S230529a"
}
],
"targets": []
},
{
"id": 118,
"topic": "gcn.circular",
"uuid": "1b098a19-40bf-4e30-8308-7cbbdd098743",
"title": "LIGO/Virgo/KAGRA S230529ay: AstroSat CZTI non-detection and upper limits",
"submitter": "Hop gcn.circular",
"authors": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"data": {
"date": "23/05/30 11:47:31 GMT",
"from": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"title": "GCN CIRCULAR",
"number": "33896",
"subject": "LIGO/Virgo/KAGRA S230529ay: AstroSat CZTI non-detection and upper limits"
},
"message_text": "G. Waratkar (IITB), V. Bhalerao (IITB), D. Bhattacharya (Ashoka University/IUCAA), A. R. Rao (TIFR), S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:\n\nWe have carried out a search for X-ray candidates in AstroSat CZTI data in a 100-sec window around the trigger time of the event S230529ay (UTC 2023-05-29 18:15:00, GraceDB event). We use the Bilby.multiorder.fits,0 map (https://gracedb.ligo.org/api/superevents/S230529ay/files/Bilby.multiorder.fits,0) for our analysis. CZTI is a coded aperture mask instrument that has a considerable effective area for about 29% of the entire sky but is also sensitive to brighter transients from the entire sky. At the time of the merger, AstroSat's nominal pointing is RA, DEC = 12:26:03.3, 33:32:18.1 (186.5138,33.5384), which is ~103 deg away from the maximum probability location, which severely reduces the effective area of CZTI. At the time of the merger event, the Earth-satellite-transient angle corresponding to the maximum probability location is ~81 deg and hence is not occulted by Earth in the satellite's frame. In a time interval of 100 sec around the event, the region of the localization map which Earth does not occult in the satellite's frame has a total probability of 0.76 (76%).\n\nCZTI data were de-trended to remove orbit-wise background variation. We then searched data from the four independent, identical quadrants for coincident spikes in the count rates. Searches were undertaken by binning the data in 0.1s, 1s, and 10s respectively. Statistical background count rate fluctuations were estimated using data from 5 preceding orbits. We selected confidence levels such that the probability of a false trigger in a 100-sec window is 10^-4. We do not find any evidence for any hard X-ray transient in this window, in the CZTI energy range of 20-200 keV.\n\nWe use a detailed mass model of the satellite to calculate the direction-dependent instrument response for points in the visible sky. We then assume the source is modeled as a power law with photon index alpha = -1, and convert our count rate upper limits to direction-dependent flux limits. We obtain the following upper limits for source flux in the 20-200 keV band by taking a probability-weighted mean over the visible sky:\n\n0.1 s: flux limit= 1.31e-05 ergs/cm^2/s; fluence limit = 1.31e-06 ergs/cm^2\n1.0 s: flux limit= 2.42e-06 ergs/cm^2/s; fluence limit = 2.42e-06 ergs/cm^2\n10.0 s: flux limit= 3.22e-07 ergs/cm^2/s; fluence limit = 3.22e-06 ergs/cm^2\n\nCZTI is built by a TIFR-led consortium of institutes across India, including VSSC, URSC, IUCAA, SAC, and PRL. The Indian Space Research Organisation funded, managed, and facilitated the project.\n\nCZTI EMGW detections are reported regularly on the payload site at:\nhttp://astrosat.iucaa.in/czti/?q=emgw\n\n",
"published": "2023-05-30T11:47:41.286272Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-05-30T11:47:41.286306Z",
"modified": "2023-05-30T11:47:41.293440Z",
"nonlocalizedevents": [
{
"event_id": "S230529a"
}
],
"targets": []
},
{
"id": 580,
"topic": "igwn.gwalert",
"uuid": "02e016d8-bc23-484c-bcd1-7b9e4b14d218",
"title": "S230624bv - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230624bv/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230624bv/view/"
},
"event": {
"far": 4.651857823919319e-06,
"time": "2023-06-24T18:19:56.213Z",
"group": "CBC",
"search": "AllSky",
"area_50": 418.3354262849411,
"area_90": 1689.9177546326846,
"duration": null,
"pipeline": "pycbc",
"properties": {
"HasNS": 1.0,
"HasMassGap": 0.13879755607185273,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": false,
"skymap_hash": "b719dba33ad22e18803dc40ec5764dc3",
"classification": {
"BBH": 0.0,
"BNS": 0.0002521384093454105,
"NSBH": 0.004027799702908307,
"Terrestrial": 0.9957200618877463
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-06-24T19:29:46Z",
"superevent_id": "S230624bv",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-24T19:29:48.215283Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-24T19:29:48.215308Z",
"modified": "2023-06-24T19:29:48.220418Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 149,
"topic": "igwn.gwalert",
"uuid": "46d059ab-6eda-4298-b322-ebea2145fba2",
"title": "S230605o - PRELIMINARY",
"submitter": "cody.messick-30d512c8",
"authors": "LVK",
"data": {
"urls": {
"skymap": "https://gracedb.ligo.org/api/superevents/S230605o/files/bayestar.multiorder.fits,0",
"gracedb": "https://gracedb.ligo.org/superevents/S230605o/view/"
},
"event": {
"far": 1.705496074225415e-12,
"time": "2023-06-05T06:53:43.493Z",
"group": "CBC",
"search": "AllSky",
"area_50": 352.24105172456166,
"area_90": 1420.7143179312027,
"duration": null,
"pipeline": "gstlal",
"properties": {
"HasNS": 0.0,
"HasMassGap": 0.0,
"HasRemnant": 0.0
},
"instruments": [
"H1",
"L1"
],
"significant": true,
"skymap_hash": "3f7045a8a4df5f69e8355147eebda7f7",
"classification": {
"BBH": 0.9999969581871078,
"BNS": 2.585750205322853e-25,
"NSBH": 1.7434438952535805e-23,
"Terrestrial": 3.0418128922349297e-06
},
"skymap_version": 0,
"central_frequency": null
},
"alert_type": "PRELIMINARY",
"sequence_num": 1,
"time_created": "2023-06-05T06:54:06Z",
"superevent_id": "S230605o",
"external_coinc": null
},
"message_text": "",
"published": "2023-06-05T06:54:07.943262Z",
"message_parser": "IGWN Alert Avro Parser v1",
"retracted": false,
"created": "2023-06-05T06:54:07.943285Z",
"modified": "2023-06-05T06:54:07.951276Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 150,
"topic": "hermes.message",
"uuid": "465d6380-643e-40b6-9415-e12dd7be999d",
"title": "INTEGRAL follow-up of S230605o",
"submitter": "Volodymyr Savchenko",
"authors": "",
"data": {},
"message_text": "INTEGRAL follow-up of S230605o at 2023-06-05T06:53:43.000\n\n\n\n\n\nbreak since 7.5 hr next data in 1.8 hr",
"published": "2023-06-05T06:54:31.050019Z",
"message_parser": "Hermes Message Parser v2",
"retracted": false,
"created": "2023-06-05T06:54:31.050051Z",
"modified": "2023-06-05T06:54:31.054997Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 7635,
"topic": "lvk-users.beccatest",
"uuid": "506abbce-85c2-4eb2-8d9a-3d1d490c6157",
"title": "Generic Message",
"submitter": "",
"authors": "",
"data": {
"ifo": [
"V1"
],
"time": [
1400453000
],
"range": 45.57833766594203
},
"message_text": "",
"published": "2024-05-22T22:43:28.053690Z",
"message_parser": "",
"retracted": false,
"created": "2024-05-22T22:43:28.053711Z",
"modified": "2024-05-22T22:43:28.053720Z",
"nonlocalizedevents": [],
"targets": []
}
]
}
