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"results": [
{
"id": 6343,
"topic": "gcn.circular",
"uuid": "c67e2bb4-571b-4748-96a9-90bfac01f988",
"title": "GRB/FXT 240402B: VLT/FORS2 optical afterglow candidate",
"submitter": "Hop gcn.circular",
"authors": "Andrew Levan at Radboud University <a.levan@astro.ru.nl>",
"data": {
"date": "24/04/04 14:40:14 GMT",
"from": "Andrew Levan at Radboud University <a.levan@astro.ru.nl>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36025"
},
"title": "GCN CIRCULAR",
"number": "36025",
"subject": "GRB/FXT 240402B: VLT/FORS2 optical afterglow candidate"
},
"message_text": "A.J. Levan (Radboud), D.B. Malesani (DAWN/NBI & Radboud), P.G. Jonker (Radboud), N.R. Tanvir (Leicester), M. E. Ravasio (Radboud), A. Martin-Carrillo (UCD), G. Pugliese (Amsterdam), S. Campana (INAF/Brera), D. Xu (NAOC/CAS) report on behalf of the Stargate collaboration: \n\nWe obtained observations of FXT/GRB 240402B (Xu et al., GCN 36016; Xue et al., GCN 36017) with the FORS2 imager on the VLT UT1 (Antu). Observations began at 06:44 UT on 4 April 2024, approximately 1.9 days after the high-energy detection. We obtained a total of 1400 s of observations in the R band. Within the 10â error box of the X-ray transient located by Einstein Probe follow-up observations (Jia et al., GCN 36022), we identify a new source not present in archival images retrieved via the Legacy Survey. This source lies at \n\nRA = 16:21:48.247\nDec = +25:45:47.34\n\nWe suggest this is the optical afterglow of FXT/GRB240402B. Photometry is complicated by the presence of a nearby star just 1â away (a confirmed star, given a Gaia measured proper motion), but the magnitude of the transient at the time of the observations was approximately r ~ 22 calibrated to Pan-STARRS. The offset from the nearby galaxy CGCG 138-001 (z = 0.047) is approximately 200 kpc in projection, at the higher end of those expected for ejected compact object mergers.\n\nWe thank the staff at the VLT for the rapid execution of these observations, in particular Julia Seidel.\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36025.",
"published": "2024-04-04T14:40:30.229707Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-04T14:40:30.229723Z",
"modified": "2024-04-04T14:40:30.235963Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6344,
"topic": "gcn.circular",
"uuid": "c5738abd-e508-4e99-8821-ea25a89c7a9f",
"title": "IceCube-240327B: GRANDMA observations of 4FGL J0555.9+0030",
"submitter": "Hop gcn.circular",
"authors": "marion.pillas@ligo.org",
"data": {
"date": "24/04/04 14:49:34 GMT",
"from": "marion.pillas@ligo.org",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36026"
},
"title": "GCN CIRCULAR",
"number": "36026",
"subject": "IceCube-240327B: GRANDMA observations of 4FGL J0555.9+0030"
},
"message_text": "M. Pillas, S. Antier (OCA), T. Pradier (Unistra/IPHC), E. Elhosseiny (NRIAG), F. Magnani (CPPM), Sh. Agayeva, Z.Vidadi, N. Ismailov, A.Hasanov and S. Alisov. (ShAO), M. Prouza, S. Karpov, M. Masek, M. Blazek (FZU), A. Baransky, O. Pyshna, O. Sokoliuk, A. Simon, V. Vasylenko (Lisnyky), Z. Benkhaldoun, A. Kaeouch (OUCA,KNC), I. Tosta e Melo (UniCT-DFA), P. Hello (IJCLAB), M. Coughlin (UMN), C. Andrade (UMN), P-A Duverne (APC), D. Turpin (CEA-Saclay/Irfu); X. Wang (Tsinghua Uni), T. Sun (PMO):\n\nOn behalf of GRANDMA collaboration:\n\nWe observed the localization region of the neutrino event IceCube-240327B (Sommani et. al, GCN 35984, Mang et al., GCN 36005) and especially in optical the known gamma-ray source 4FGL J0555.9+0030, located at RA = 89.00 deg, Dec = 0.51 deg J2000, a potential gamma-ray source counterpart candidate (Sommani et. al, GCN 35984)\n\nWe didnât find any optical counterpart at the location of 4FGL J0555.9+0030 from 0.8 to 4.2 days post T0 = 2024-03-27, at 16:12:0.47 UT. \n\nResults are consistent with Stein et al., (GCN. 35989)\n\nIn the following table, we report a subset of the preliminary photometry of our observations of 4FGL J0555.9+0030. Magnitudes are reported in Vega system.\n\n T-T0 day | MJD | Obser. | Exposure | Filter | Upper limit (5 sigma)\nâ------------------------------------------------------------------------------------------------\n 0.8 | 60397.52897106 | Yaonan-80 | 2x180s | Rc | 20.55 (Vega)\n 0.8 | 60397.52897106 | Yaonan-80 | 3x180s | B | 18.72 (Vega)\n 0.8 | 60397.52897106 | Yaonan-80 | 3x180s | Ic | 18.8 (Vega)\n 0.8 | 60397.52897106 | Yaonan-80 | 3x180s | V | 18 (Vega)\n 1.0 | 60397.70783564 | ShAO-T60 | 20x120s | V | 19.0 (Vega)\n 1.4 | 60398.05042824 | FRAM-Auger | 62X60s | Rc | 18.7 (Vega)\n 1.4 | 60398.05131481 | FRAM-Auger | 62X60s | V | 18.9 (Vega)\n 3.1 | 60399.74584491 | Lisnyky/AZT-8 | 29x60s | Rc | 18.8 (Vega)\n 3.1 | 60399.78062500 | Lisnyky/AZT-8 | 22x60s | Ic | 18.1 (Vega)\n 3.2 | 60399.85178840 | HAOs | 10x180 | V | 21.5 (Vega)\n 3.2 | 60399.87614483 | HAOs | 10x180 | Rc | 20.2 (Vega)\n 4.2 | 60400.88071398 | ASO | 10x180 | V | 21.9 (Vega) \n\n\nJohnson filters have been measured using the Gaia catalog (except for Yaonan-80 taken calibrated with USNO and UCAC4). All the data have been reduced by a single data processing pipeline STDPIPE (Karpov et al., 2022).\n\nWe also run subtracted detection pipeline from Karpov et al., on the deepest images from HAOs and ASO at 3.2 days post T0 and couldnât find any other new transient candidates within an 8 arcmin radius and 9 arcmin, respectively, around the location of 4FGL J0555.9+0030.\n\nGRANDMA is a worldwide coordinated telescope network (grandma.ijclab.in2p3.fr) devoted to the observation of transients in the context of multi-messenger astrophysics (Antier et al. 2020 MNRAS497, 5518). Kilonova-Catcher (KNC) is the citizen science program of GRANDMA (http://kilonovacatcher.in2p3.fr/).\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36026.",
"published": "2024-04-04T14:49:53.077913Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-04T14:49:53.077932Z",
"modified": "2024-04-04T14:49:53.085480Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6345,
"topic": "gcn.circular",
"uuid": "17349610-10f1-48bd-b464-b3fccee74f3c",
"title": "GRB/FXT 240402B: Kinder optical counterpart candidate",
"submitter": "Hop gcn.circular",
"authors": "Janet Chen at National Central University <janetstars@gmail.com>",
"data": {
"date": "24/04/04 15:37:12 GMT",
"from": "Janet Chen at National Central University <janetstars@gmail.com>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36027"
},
"title": "GCN CIRCULAR",
"number": "36027",
"subject": "GRB/FXT 240402B: Kinder optical counterpart candidate"
},
"message_text": "S. Yang (HNAS), T.-W. Chen, H.-Y. Hsiao, W.-J. Hou, A. Sankar.K, Y.-C. Pan, M.-H. Lee, C.-H. Lai, C.-C. Ngeow, C.-S. Lin, H.-C. Lin, J.-K. Guo (all NCUIA), S. J. Smartt, J. Gillanders, L. Rhodes, S. Srivastav (all Oxford) and T. Moore (QUB) report:\n\nFollowing the detection of an X-ray transient (LXT 240402A) by LEIA (Xu et al. GCN 36016) and FXT on board âEinstein Probe (Jia et al. GCN 36022), and an associated GRB 240402A by GECAM-C (Xue et al. GCN 36017), we used several telescopes at the Lulin Observatory, Taiwan as part of the Kinder collaboration (Chen et al., AstroNote 2021-92) for optical counterpart searches. Our followup facilities includes the Lulin One-meter Telescope (LOT) with g and r bands, and the 40cm Super Light Telescope (SLT) with r and i bands, and our observing details were below:\n\nTelescope | Filter | MJD | t-t0 | Explosure | avg. Seeing | med. Airmass\nSLT | r | 60403.644 | 1.28 day | 300 sec * 15 | 1\".8 | 1.33 \nSLT | i | 60403.713 | 1.35 day | 300 sec * 44 | 1\".8 | 1.03 \nLOT | r | 60403.720 | 1.35 day | 300 sec * 12 | 1\".2 | 1.08\nLOT | g | 60403.771 | 1.40 day | 300 sec * 10 | 1\".2 | 1.04 \n\n(1). LXT 240402A\n\nWe used the Kinder pipeline (Yang et al. A&A 646, A22) to stack the images with same pointing and subtract the stacked images with the LEGACY SURVEY template images. We do not detect significant optical counterpart candidates within the 1.5 arcmin error area of LXT 240402A. In 2.5 sigma level, we obtained the following preliminary upper limits (in the AB system): \n\nSLT r > 22.74, \nSLT i > 22.61, \nLOT r > 23.57 and \nLOT g > 23.58 mag.\n\nOur result is consistent with GWAC-F50A (Xin et al., GCN 36018), MASTER (Lipunov et al., GCN 36019) and AST3-3 (Sun et al., GCN 36023), and our limits are deeper than these reports.\n\n(2). FXT/GRB 240402B \n\nFurthermore, we noticed that EP-FXT announced the detection of the X-ray afterglow (Jia et al., GCN 36022) of LXT240402A, which is 2.4 arcmin away from the LEIA source. We thus repeat the procedure detailed above on this specific position and found a clear optical counterpart at the location of RA = 16:21:48.225, Dec = 25:45:47.57 in the differencing images. We measured the PSF magnitudes of this source after subtracted with the LEGACY SURVEY templates and obtained (all in the AB system):\n\ng = 22.86 +/- 0.09 and\nr = 22.28 +/- 0.10 mag.\nNo deep i-band template images were available in the LEGACY SURVEY archive, so we do not report the measurements in this note. Further analysis is on-going.\n\nThe given magnitudes are derived based on calibrating against SDSS field stars and is not corrected for the expected Galactic foreground extinction corresponding to a reddening of E_(B-V) = 0.03 mag in the direction of the burst (Schlafly & Finkbeiner 2011).\n\nWe note that this source is difficult to resolve from a star (i.e. SDSS J162148.18+254546.5, r = 20.6 mag) in our images. Upon visual inspection, the star appears to have a broader profile.\n\nWe independently identified this optical counterpart candidate while drafting this report, and we noticed that this counterpart has also been reported in Levan et al., GCN 36025.\n\nWe thank the Einstein Probe team for useful communication.\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36027.",
"published": "2024-04-04T15:37:32.226450Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-04T15:37:32.226464Z",
"modified": "2024-04-04T15:37:32.232421Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6863,
"topic": "gcn.circular",
"uuid": "034158af-b405-4e67-a82c-a08539092cd2",
"title": "LIGO/Virgo/KAGRA S240422ed: Zwicky Transient Facility observations and candidates",
"submitter": "Hop gcn.circular",
"authors": "Tomas Ahumada at Caltech <tahumada@caltech.edu>",
"data": {
"date": "24/04/23 07:17:27 GMT",
"from": "Tomas Ahumada at Caltech <tahumada@caltech.edu>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36246"
},
"title": "GCN CIRCULAR",
"number": "36246",
"subject": "LIGO/Virgo/KAGRA S240422ed: Zwicky Transient Facility observations and candidates"
},
"message_text": "Tomás Ahumada (Caltech), Shreya Anand (CIT), Viraj Karambelkar (CIT), Eric Bellm (UW), Robert Stein (CIT), Mansi Kasliwal (CIT), Avery Wold (IPAC), Utkarsh Pathak (IITB), Theophile du Laz (CIT), Simeon Reusch (DESY), Igor Andreoni (UMD), Varun Bhalerao (IITB), Brad Cenko (UMD), Michael Coughlin (UMN), David Kaplan (UWM), Ravi Kumar (IITB), A. Ernsts (DESY), J. Nordin (DESY), Jannis Necker (DESY), D. Perley (LJMU), Anirudh Salgundi (IITB), Aswin Suresh (IITB), Vishwajeet Swain (IITB), Gaurav Waratkar (IITB), Jesper Sollerman (OKC) report on behalf of the ZTF and GROWTH collaborations:\n\n\nWe observed the localization region of the LVK trigger S240422ed (GCN 36236) with the Palomar 48-inch telescope equipped with the 47 square-degree Zwicky Transient Facility (ZTF) camera (Graham et al., 2019; Bellm et al., 2019). We obtained images in the g- and r-bands of the Bilby map (GCN 36240) We started observations in the g-, r- and i-band beginning at 2024-04-23 03:26 UTC, approximately 5.9 hours after event time, targeting 70% of the localization - detailed map of our coverage was reported to TreasureMap (Wyatt et al. 2020). Accounting for southern fields without reference images, chip gaps and processing success rate, we searched 48.8% (149.8 sq deg) of the reported localization region in real-time. Our observations were 300s, and reached a median depth of 19.8 in g-band, 20.6 in r-band and 19.8 in i-band.\n\nWe queried the ZTF alert stream using Kowalski (Duev et al. 2019) through Fritz (Coughlin et al. 2023), emgwcave (Karambelkar et al. in prep), and AMPEL (Nordin et al. 2019). We required at least 2 detections separated by at least 15 minutes to select against moving objects. Furthermore, we cross-match our candidates with the Minor Planet Center to flag known asteroids, reject stellar sources (Tachibana and Miller 2018 and using the GAIA catalog), and apply machine learning algorithms (Mahabal et al. 2019). We require that no spatially coincident ZTF alerts were issued before the detection time of the LVK trigger. We also ran forced photometry on ZTF images (Masci et al. 2019) and require no detections before the LVK trigger.\n\nAll candidates were rejected. Further follow-up of these fields will continue.\n\nZTF and GROWTH are worldwide collaborations comprising Caltech, USA; IPAC, USA, WIS, Israel; OKC, Sweden; JSI/UMd, USA; U Washington, USA; DESY, Germany; MOST, Taiwan; UW Milwaukee, USA; LANL USA; Tokyo Tech, Japan; IITB, India; IIA, India; LJMU, UK; TTU, USA; SDSU, USA and USyd, Australia. ZTF acknowledges the generous support of the NSF under AST MSIP Grant No 1440341. GROWTH acknowledges the generous support of the NSF under PIRE Grant No 1545949. Alert distribution service provided by DIRAC@UW (Patterson et al. 2019). Alert database searches are done by AMPEL (Nordin et al. 2019) and Kowalski (Duev et al. 2019). The GROWTH India Telescope (GIT, Kumar et al., 2022) is set up by the Indian Institute of Astrophysics (IIA) and the Indian Institute of Technology Bombay (IITB) with funding from DST-SERB and IUSSTF. Its operations are partially supported by funding from the IIT Bombay alumni batch of 1994. The Fritz and SkyPortal projects acknowledge the generous support of The Gordon and Betty Moore Foundation.\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36246.",
"published": "2024-04-23T07:17:40.936033Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-23T07:17:40.936062Z",
"modified": "2024-04-23T07:17:40.946314Z",
"nonlocalizedevents": [
{
"event_id": "S240422e"
}
],
"targets": []
},
{
"id": 4426,
"topic": "gcn.circular",
"uuid": "20197063-ef70-4ab7-85cb-0c4919f98d07",
"title": "GRB 231104A: FRAM-ORM optical limit",
"submitter": "Hop gcn.circular",
"authors": "Martin Jelinek at Astro.Inst-AVCR,Ondrejov <martin.jelinek@asu.cas.cz>",
"data": {
"date": "23/11/07 13:35:15 GMT",
"from": "Martin Jelinek at Astro.Inst-AVCR,Ondrejov <martin.jelinek@asu.cas.cz>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34961"
},
"title": "GCN CIRCULAR",
"number": "34961",
"subject": "GRB 231104A: FRAM-ORM optical limit"
},
"message_text": "Alzbeta Malenakova, Martin Jelinek and Jan Strobl (ASU CAS Ondrejov, CZ),\nSergey Karpov, Martin Masek, Petr Janecek, Jakub Jurysek,\nJan Ebr, Ronan Cunniffe, Petr Travnicek and Michael Prouza\n(Institute of Physics, Prague, CZ)\n\nreport:\n\nThe 25cm robotic telescope FRAM-ORM at La Palma (Spain) reacted robotically\nto the Fermi-GBM/Swift/Fermi-LAT/AstroSat CZTI alert of GRB 231104A (Bala\net al., GCNC 34937, Page et al., GCNC 34938 and Goad et al., GCNC 34940,\nPrincipe. et al. 2023, GCNC 34943, Navaneeth et al., GCNC 34945), obtaining\na series of 20s unfiltered images starting at 01:48:10.3 UT, i.e. 31.3s\npost trigger, covering the third gamma ray episode of the GRB.\n\nWe do not detect any new source in comparison to Atlas Refcat 2.0 (Tonry et\nal., 2018) neither in single images (detection limit r'>17.6) nor in a\ncombined 40x20s frame (mean exp time 960s post trigger, with a limit\nr'>18.6) similarly to Strausbaugh et al. (GCNC 34939), Kuin et al. (GCNC\n34941), Odeh et al. (GCNC 34946), Zhu et al. (GCNC 34951), Gupta et al.\n(GCNC 34955) and Busman et al. (GCNC 34958).\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34961.",
"published": "2023-11-07T13:35:26.082707Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-07T13:35:26.082728Z",
"modified": "2023-11-07T13:35:26.089800Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4427,
"topic": "gcn.circular",
"uuid": "818a3c65-8bd8-4e8b-a389-f19be9c66f79",
"title": "Fermi Gamma-ray Burst Monitor trigger 231107654 / 721064512 is not a GRB",
"submitter": "Hop gcn.circular",
"authors": "Oliver J Roberts at USRA/NASA <oliver.roberts@nasa.gov>",
"data": {
"date": "23/11/07 22:27:00 GMT",
"from": "Oliver J Roberts at USRA/NASA <oliver.roberts@nasa.gov>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34962"
},
"title": "GCN CIRCULAR",
"number": "34962",
"subject": "Fermi Gamma-ray Burst Monitor trigger 231107654 / 721064512 is not a GRB"
},
"message_text": "O.J. Roberts (USRA/NASA-MSFC) reports on behalf of the Fermi Gamma-ray Burst Monitor Team:\n\nâThe Fermi Gamma-ray Burst Monitor (GBM) trigger 231107654 / 721064512 at 15:41:47.36 UT\non 07 November 2023, tentatively classified as a GRB, is in fact not due to a GRB. \nThis trigger is due to local particles.\"\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34962.",
"published": "2023-11-07T22:27:15.119912Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-07T22:27:15.119934Z",
"modified": "2023-11-07T22:27:15.127525Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4428,
"topic": "gcn.circular",
"uuid": "3ff2176d-1abc-4879-9a1c-fbe9c6471407",
"title": "Fermi trigger No 721006392: 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": "23/11/07 22:45:51 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34963"
},
"title": "GCN CIRCULAR",
"number": "34963",
"subject": "Fermi trigger No 721006392: 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-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB231106.98 (trigger No 721006392,08h 17m 40.80s , +53d 17m 24.0s, R=8.02) errorbox 12562 sec after notice time and 80126 sec after trigger time at 2023-11-07 21:48:34 UT, with upper limit up to 19.1 mag. The observations began at zenith distance = 47 deg. The sun altitude is -61.9 deg.\n\nThe galactic latitude b = 35 deg., longitude l = 165 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"97251\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 80157 | 2023-11-07 21:48:34 | MASTER-Tavrida | (08h 04m 24.79s , +54d 39m 15.6s) | C | 60 | 19.1 |\n 81504 | 2023-11-07 22:11:01 | MASTER-Tavrida | (08h 04m 24.92s , +54d 39m 04.6s) | C | 60 | 17.7 |\n 81576 | 2023-11-07 22:12:13 | MASTER-Tavrida | (08h 18m 07.02s , +54d 38m 20.4s) | C | 60 | 18.3 |\n 82472 | 2023-11-07 22:27:09 | MASTER-Tavrida | (08h 04m 22.89s , +54d 40m 10.0s) | C | 60 | 17.8 |\n 82543 | 2023-11-07 22:28:20 | MASTER-Tavrida | (08h 18m 04.92s , +54d 39m 32.1s) | C | 60 | 18.2 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34963.",
"published": "2023-11-07T22:46:02.993716Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-07T22:46:02.993757Z",
"modified": "2023-11-07T22:46:03.008958Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4431,
"topic": "gcn.circular",
"uuid": "00622a90-9e1a-4018-a0e7-06a70137e1a3",
"title": "GRB 231104A: Swift-BAT refined analysis",
"submitter": "Hop gcn.circular",
"authors": "Sibasish Laha at GSFC <sibasish.laha@nasa.gov>",
"data": {
"date": "23/11/08 01:28:51 GMT",
"from": "Sibasish Laha at GSFC <sibasish.laha@nasa.gov>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34964"
},
"title": "GCN CIRCULAR",
"number": "34964",
"subject": "GRB 231104A: Swift-BAT refined analysis"
},
"message_text": "M. Stamatikos (OSU), S. D. Barthelmy (GSFC),\nH. A. Krimm (NSF), S. Laha (GSFC/UMBC),\nA. Y. Lien (U Tampa),C. B. Markwardt (GSFC),\nD. M. Palmer (LANL), T. Parsotan (GSFC/UMBC),\nT. Sakamoto (AGU),(i.e. the Swift-BAT team):\n\nUsing the data set from T-239 to T+963 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 231104A (trigger #1194500)\n(Page et al., GCN Circ. 34938). The BAT ground-calculated position is\nRA, Dec = 23.824, 83.794 deg which is\n RA(J2000) = 01h 35m 17.8s\n Dec(J2000) = +83d 47' 38.7\"\nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 89%.\n\nThe BAT light curve shows a complex structure with a duration of ~ 80 sec.\nT90 (15-350 keV) is 46.77 +- 1.54 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-13.39 to T+55.84 sec is best fit by a simple\npower-law model. The power law index of the time-averaged spectrum is\n1.24 +- 0.03. The fluence in the 15-150 keV band is 1.3 +- 0.0 x 10^-05 erg/cm2.\nThe 1-sec peak photon flux measured from T+0.24 sec in the 15-150 keV band\nis 24.8 +- 0.6 ph/cm2/sec. All the quoted errors are at the 90% confidence\nlevel.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/1194500/BA/\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34964.",
"published": "2023-11-08T01:29:02.108265Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-08T01:29:02.108289Z",
"modified": "2023-11-08T01:29:02.119365Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6346,
"topic": "gcn.circular",
"uuid": "2cb24fb8-fe6d-4ede-8d9b-3cb3af3a37d3",
"title": "Konus-Wind detection of LXT 240402A/GRB 240402B",
"submitter": "Hop gcn.circular",
"authors": "Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru>",
"data": {
"date": "24/04/04 15:59:11 GMT",
"from": "Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36028"
},
"title": "GCN CIRCULAR",
"number": "36028",
"subject": "Konus-Wind detection of LXT 240402A/GRB 240402B"
},
"message_text": "A. Ridnaia, D. Frederiks, A. Lysenko, D. Svinkin,\nA. Tsvetkova, M. Ulanov, and T. Cline,\non behalf of the Konus-Wind team, report:\n\nThe long-duration GRB 240402B\n(GECAM-C detection: Xue et al., GCN 36017)\nassociated with the LEIA fast X-ray transient\nLXT 240402A (Xu et al., GCN 36016)\ntriggered Konus-Wind at T01668.797 s UT (08:47:48.797).\n\nThe burst light curve shows a multipeaked structure\nwhich starts at ~T0-0.2 s and has a total duration of ~5.1 s.\nThe emission is seen up to ~3 MeV.\n\nThe Konus-Wind light curve of this GRB is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB240402_T31668/\n\nAs observed by Konus-Wind, the burst\nhad a fluence of 7.56(-0.43,+0.50)x10^-6 erg/cm2,\nand a 64-ms peak flux, measured from T0+2.704 s,\nof 5.07(-0.66,+0.68)x10^-6 erg/cm2/s\n(both in the 20 keV - 10 MeV energy range).\n\nThe time-averaged spectrum of the burst\n(measured from T0 to T0+8.448 s)\nis best fit in the 20 keV - 4 MeV range\nby the GRB (Band) model with the following parameters:\nthe low-energy photon index alpha = -0.71(-0.17,+0.19),\nthe high energy photon index beta = -3.58(-1.30,+0.44),\nthe peak energy Ep = 86(-4,+5) keV\n(chi2 = 57/68 dof).\n\nThis spectrum is nearly-well fitted\nby a power law with exponential cutoff model:\ndN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)\nwith alpha = -0.78(-0.15,+0.16)\nand Ep = 88(-4,+4) keV (chi2 = 61/69 dof).\n\nAll the quoted errors are at the 90% confidence level.\nAll the quoted values are preliminary.\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36028.",
"published": "2024-04-04T15:59:27.316875Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-04T15:59:27.316890Z",
"modified": "2024-04-04T15:59:27.326509Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4436,
"topic": "gcn.circular",
"uuid": "2e748b0f-9047-4f96-b0d7-df0edcbc9c6d",
"title": "GRB 231106A: CALET Gamma-Ray Burst Monitor detection",
"submitter": "Hop gcn.circular",
"authors": "Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>",
"data": {
"date": "23/11/08 07:00:36 GMT",
"from": "Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34965"
},
"title": "GCN CIRCULAR",
"number": "34965",
"subject": "GRB 231106A: CALET Gamma-Ray Burst Monitor detection"
},
"message_text": "T. Sakamoto, A. Yoshida, 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 long GRB 231106A (Fermi GBM Final Real-time Localization:\nFermi GBM team, GCN Circ. 34956) triggered the CALET Gamma-ray\nBurst Monitor (CGBM) at 18:12:50.43 UTC on 6 November 2023\n(http://cgbm.calet.jp/cgbm_trigger/flight/1383329517).\nThe burst signal was seen by all CGBM detectors.\n\nThe burst light curve shows a multi-peaked structure that starts\nat T-8.5 sec, peaks at T+38.1 sec, and ends at T+80.9 sec.\nThe T90 duration measured by the SGM data are 61.6 +/- 6.3\nsec (40-1000 keV).\n\nThe ground-processed light curve is available at\n\nhttp://cgbm.calet.jp/cgbm_trigger/ground/1383329517/index.html\n\nThe CALET data used in this analysis are provided by\nthe Waseda CALET Operation Center located at Waseda University.\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34965.",
"published": "2023-11-08T07:00:46.980885Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-08T07:00:46.980916Z",
"modified": "2023-11-08T07:00:46.998173Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4437,
"topic": "gcn.circular",
"uuid": "cc6fa4ad-9bf1-4244-ac59-b2c7bd237f77",
"title": "GRB 231106A: AstroSat CZTI detection",
"submitter": "Hop gcn.circular",
"authors": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"data": {
"date": "23/11/08 09:10:39 GMT",
"from": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34966"
},
"title": "GCN CIRCULAR",
"number": "34966",
"subject": "GRB 231106A: AstroSat CZTI detection"
},
"message_text": "P. K. Navaneeth (IUCAA), G. Waratkar (IITB), A. Vibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (Ashoka University/IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:\n\nAnalysis of AstroSat CZTI data with the CIFT framework (Sharma et al., 2021, JApA, 42, 73) showed the detection of a GRB 231106A which was also detected by Fermi - GBM (Fermi GBM Team, GCN Circ. 34956) and CALET (Sakamoto et al., GCN Circ. 34965).\n\nThe source was clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range. The light curve showed multiple peaks of emission with the strongest peak at 2023-11-06 18:13:23.15 UTC. The measured peak count rate associated with the burst is 213 (+67, -26) counts/s above the background in the combined data of all quadrants, with a total of 3452 (+1277, -1014) counts. The local mean background count rate was 1235 (+4, -5) counts/s. We measure a T90 of 54 (+22, -11) s from the cumulative Veto light curve.\n\nCZTI is built by a TIFR-led consortium of institutes across India, including VSSC, URSC, IUCAA, SAC, and PRL. The Indian Space Research Organisation funded, managed, and facilitated the project.\n\nCZTI GRB detections are reported regularly on the payload site at:\nhttp://astrosat.iucaa.in/czti/?q=grb\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34966.",
"published": "2023-11-08T09:10:50.649911Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-08T09:10:50.649931Z",
"modified": "2023-11-08T09:10:50.657908Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4441,
"topic": "gcn.circular",
"uuid": "4854eabb-c31f-42db-9ca6-ff33192dbb45",
"title": "LIGO/Virgo/KAGRA S231108u: Identification of a GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "Maria Brozzetti at Virgo <marialisa.brozzetti@ligo.org>",
"data": {
"date": "23/11/08 13:53:38 GMT",
"from": "Maria Brozzetti at Virgo <marialisa.brozzetti@ligo.org>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34967"
},
"title": "GCN CIRCULAR",
"number": "34967",
"subject": "LIGO/Virgo/KAGRA S231108u: Identification of a GW compact binary merger candidate"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:\n\nWe identified the compact binary merger candidate S231108u during real-time processing of data from LIGO Hanford Observatory (H1) and LIGO Livingston Observatory (L1) at 2023-11-08 12:51:42.463 UTC (GPS time: 1383483120.463). The candidate was found by the CWB [1], GstLAL [2], MBTA [3], PyCBC Live [4], and SPIIR [5] analysis pipelines.\n\nS231108u is an event of interest because its false alarm rate, as estimated by the online analysis, is 3.2e-10 Hz, or about one in 1e2 years. The event's properties can be found at this URL:\n\nhttps://gracedb.ligo.org/superevents/S231108u\n\nThe classification of the GW signal, in order of descending probability, is BBH (>99%), Terrestrial (<1%), BNS (<1%), or NSBH (<1%).\n\nAssuming the candidate is astrophysical in origin, the probability that the lighter compact object is consistent with a neutron star mass (HasNS) is <1%. [6] Using the masses and spins inferred from the signal, the probability of matter outside the final compact object (HasRemnant) is <1%. [6] Both HasNS and HasRemnant consider the support of several neutron star equations of state. The probability that either of the binary components lies between 3 and 5 solar masses (HasMassGap) is <1%.\n\nTwo sky maps are available at this time and can be retrieved from the GraceDB event page:\n * bayestar.multiorder.fits,1, an initial localization generated by BAYESTAR [7], distributed via GCN notice about 27 seconds after the candidate event time.\n * bayestar.multiorder.fits,2, an initial localization generated by BAYESTAR [7], distributed via GCN notice about 5 minutes after the candidate event time.\n\nThe preferred sky map at this time is bayestar.multiorder.fits,2. For the bayestar.multiorder.fits,2 sky map, the 90% credible region is 1121 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 2240 +/- 592 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] Klimenko et al. PRD 93, 042004 (2016)\n [2] Tsukada et al. PRD 108, 043004 (2023) and Ewing et al. arXiv:2305.05625 (2023)\n [3] Aubin et al. CQG 38, 095004 (2021)\n [4] Dal Canton et al. ApJ 923, 254 (2021)\n [5] Chu et al. PRD 105, 024023 (2022)\n [6] Chatterjee et al. ApJ 896, 54 (2020)\n [7] Singer & Price PRD 93, 024013 (2016)\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34967.",
"published": "2023-11-08T13:53:49.599641Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-08T13:53:49.599668Z",
"modified": "2023-11-08T13:53:49.605598Z",
"nonlocalizedevents": [
{
"event_id": "S231108u"
}
],
"targets": []
},
{
"id": 4444,
"topic": "gcn.circular",
"uuid": "e3eb8ac8-bae4-427a-b6cb-b9b69bda48db",
"title": "LIGO/Virgo/KAGRA O4 Landscape",
"submitter": "Hop gcn.circular",
"authors": "Kunal Mooley at NRAO,Caltech <kmooley@caltech.edu>",
"data": {
"date": "23/11/08 18:39:47 GMT",
"from": "Kunal Mooley at NRAO,Caltech <kmooley@caltech.edu>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34968"
},
"title": "GCN CIRCULAR",
"number": "34968",
"subject": "LIGO/Virgo/KAGRA O4 Landscape"
},
"message_text": "Ajisha Sajayan, Kaustubh Jha (IIT Kanpur), Kunal Mooley (IIT Kanpur, Caltech)\n\nThe LVK Collaboration has announced over 50 significant GW events in the first ~5.5 months of O4. We present a (regularly-updated) Localization Distance vs. Area plot, for these mergers (FAR<1 per year), which portrays the current O4 landscape. The interactive plot is hosted here: http://www.tauceti.caltech.edu/kunal/O4.html.\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34968.",
"published": "2023-11-08T18:40:01.384895Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-08T18:40:01.384932Z",
"modified": "2023-11-08T18:40:01.400501Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6864,
"topic": "gcn.circular",
"uuid": "015aa676-07ef-4b44-a716-6dc55c2c22a4",
"title": "LIGO/Virgo S240422ed: No counterpart candidates in INTEGRAL SPI-ACS prompt observation",
"submitter": "Hop gcn.circular",
"authors": "Volodymyr Savchenko at UNIGE, EPFL <volodymyr.savchenko@epfl.ch>",
"data": {
"date": "24/04/23 07:47:35 GMT",
"from": "Volodymyr Savchenko at UNIGE, EPFL <volodymyr.savchenko@epfl.ch>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36247"
},
"title": "GCN CIRCULAR",
"number": "36247",
"subject": "LIGO/Virgo S240422ed: 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\nperformed a search for a prompt gamma-ray counterpart of S240422ed (GCN 36236).\n\nAt the time of the event (2024-04-22 21:35:13 UTC, hereafter T0),\nINTEGRAL was operating in nominal mode. The peak of the event\nlocalization probability was at an angle of 113 deg with respect to\nthe spacecraft pointing axis. This orientation implies strongly\nsuppressed (5.6% of optimal) response of ISGRI, strongly suppressed\n(27% of optimal) response of IBIS/Veto, and near-optimal (72% of\noptimal) response of SPI-ACS.\n\nThe background within +/-300 seconds around the event was rather\nstable (excess variance 1.3).\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 1.9e-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 ~1.7e-07 (5.4e-08)\nerg/cm^2/s at 1 s (8 s) time scale in 75-2000 keV energy range.\n\nWe report for completeness and in order of FAP, all excesses\nidentified in the search region. We find: 10 likely background\nexcesses:\n\nT-T0 | scale | S/N | flux ( x 1e-06 erg/cm2/s) | FAP\n-8.75 | 0.35 | 4.2 | 4.54 +/- 0.998 +/- 1.63 | 0.0646\n39.6 | 2.5 | 3.2 | 1.3 +/- 0.369 +/- 0.466 | 0.225\n14.7 | 0.05 | 5 | 1.47 +/- 0.274 +/- 0.526 | 0.228\n46.7 | 0.45 | 3.7 | 3.49 +/- 0.877 +/- 1.25 | 0.485\n-112 | 2.55 | 3.3 | 1.33 +/- 0.365 +/- 0.477 | 0.49\n-25.5 | 0.5 | 3.3 | 3.03 +/- 0.83 +/- 1.09 | 0.521\n-33.7 | 0.3 | 3.7 | 0.44 +/- 0.108 +/- 0.158 | 0.56\n-18.7 | 0.05 | 4.1 | 1.19 +/- 0.271 +/- 0.426 | 0.607\n-44.1 | 0.3 | 3.7 | 0.438 +/- 0.108 +/- 0.157 | 0.663\n-46.7 | 0.5 | 3.4 | 3.08 +/- 0.831 +/- 1.1 | 0.747\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\nWe note that no independent IBAS alerts happened in the vicinity.\n\nSPI-ACS data can be retrieved and interactively explored in MMODA with this link:\nhttps://www.astro.unige.ch/mmoda/?DEC=-29.74516667&RA&5.97845833&T1 24-04-22T21%3A35%3A03.000&T2 24-04-22T21%3A35%3A23.000&T_format=isot&data_level=ordinary&instrument=spi_acs&product_type=spi_acs_lc&query_status=new&query_type=Real&selected_catalog=&src_name\u001e+1740.7-2942&time_bin=0.05&time_bin_format=sec\n\nINTEGRAL follow-up alert was distributed to SCIMMA through HERMES few\nminutes after the trigger GCN:\nhttps://hermes.lco.global/message/4200a286-c463-437b-8363-6fd6b6df5d73\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\nsingificant counterpart is reported.\n\n[1] Savchenko et al. 2017, A&A 603, A46\n[2] Savchenko et al. 2012, A&A 541A, 122S\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36247.",
"published": "2024-04-23T07:47:51.031851Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-23T07:47:51.031865Z",
"modified": "2024-04-23T07:47:51.039320Z",
"nonlocalizedevents": [
{
"event_id": "S240422e"
}
],
"targets": []
},
{
"id": 4449,
"topic": "gcn.circular",
"uuid": "f1bc2329-66e7-444e-b643-e6b16c6a2db4",
"title": "GRB 231108A: 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": "23/11/08 21:14:37 GMT",
"from": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34969"
},
"title": "GCN CIRCULAR",
"number": "34969",
"subject": "GRB 231108A: Fermi GBM Final Real-time Localization"
},
"message_text": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 21:03:09 UT on 8 Nov 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231108A (trigger 721170194.442402 / 231108877).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 104.8, Dec = 50.5 (J2000 degrees, equivalent to J2000 06h 59m, 50d 30'), with a statistical uncertainty of 18.6 degrees.\n\nThe angle from the Fermi LAT boresight is 102.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231108877/quicklook/glg_skymap_all_bn231108877.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/bn231108877/quicklook/glg_healpix_all_bn231108877.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231108877/quicklook/glg_lc_medres34_bn231108877.gif\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34969.",
"published": "2023-11-08T21:14:48.952434Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-08T21:14:48.952474Z",
"modified": "2023-11-08T21:14:48.961782Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4450,
"topic": "gcn.circular",
"uuid": "87a1c597-1176-45d4-87d6-c3acedb8817a",
"title": "Fermi GRB 231108A: 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": "23/11/09 00:01:29 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34970"
},
"title": "GCN CIRCULAR",
"number": "34970",
"subject": "Fermi GRB 231108A: 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-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB 231108A ( Fermi GBM team, GCN 34969) errorbox 3 sec after notice time and 40 sec after trigger time at 2023-11-08 21:03:50 UT, with upper limit up to 18.5 mag. The observations began at zenith distance = 55 deg. The sun altitude is -62.2 deg.\n\nMASTER-Kislovodsk robotic telescope located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB 231108A errorbox 691 sec after notice time and 728 sec after trigger time at 2023-11-08 21:15:18 UT, with upper limit up to 19.0 mag. The observations began at zenith distance = 41 deg. The sun altitude is -63.2 deg.\n\nThe galactic latitude b = 22 deg., longitude l = 166 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"98284\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 71 | 2023-11-08 21:03:50 | MASTER-Tavrida | (08h 41m 45.01s , +58d 27m 23.1s) | C | 60 | 17.3 |\n 147 | 2023-11-08 21:05:06 | MASTER-Tavrida | (07h 07m 08.35s , +48d 54m 26.2s) | C | 60 | 18.1 |\n 218 | 2023-11-08 21:06:17 | MASTER-Tavrida | (07h 19m 20.09s , +48d 56m 14.2s) | C | 60 | 17.6 |\n 619 | 2023-11-08 21:12:58 | MASTER-Tavrida | (08h 21m 12.60s , +39d 27m 23.9s) | C | 60 | 18.0 |\n 691 | 2023-11-08 21:14:10 | MASTER-Tavrida | (08h 31m 33.20s , +39d 26m 06.7s) | C | 60 | 17.7 |\n 759 | 2023-11-08 21:15:18 | MASTER-Kislovodsk | (07h 23m 14.82s , +54d 32m 01.4s) | C | 60 | 17.7 |\n 759 | 2023-11-08 21:15:18 | MASTER-Kislovodsk | (07h 30m 25.80s , +54d 09m 17.2s) | C | 60 | 18.4 |\n 839 | 2023-11-08 21:16:38 | MASTER-Kislovodsk | (09h 07m 35.74s , +56d 21m 29.1s) | C | 60 | 16.4 |\n 919 | 2023-11-08 21:17:58 | MASTER-Kislovodsk | (07h 17m 38.12s , +56d 24m 36.4s) | C | 60 | 17.2 |\n 919 | 2023-11-08 21:17:58 | MASTER-Kislovodsk | (07h 25m 15.46s , +56d 01m 24.9s) | C | 60 | 17.8 |\n 921 | 2023-11-08 21:18:00 | MASTER-Tavrida | (07h 11m 59.70s , +54d 38m 22.4s) | C | 60 | 18.5 |\n 999 | 2023-11-08 21:19:18 | MASTER-Kislovodsk | (07h 25m 51.74s , +56d 01m 28.8s) | C | 60 | 13.1 |\n 1155 | 2023-11-08 21:21:54 | MASTER-Tavrida | (07h 25m 54.07s , +54d 36m 55.6s) | C | 60 | 17.9 |\n 1160 | 2023-11-08 21:21:58 | MASTER-Kislovodsk | (08h 38m 59.74s , +58d 15m 35.4s) | C | 60 | 16.4 |\n 1160 | 2023-11-08 21:21:59 | MASTER-Kislovodsk | (08h 46m 31.94s , +57d 52m 18.1s) | C | 60 | 17.0 |\n 1227 | 2023-11-08 21:23:06 | MASTER-Tavrida | (07h 18m 07.07s , +52d 44m 34.1s) | C | 60 | 18.1 |\n 1299 | 2023-11-08 21:24:18 | MASTER-Tavrida | (07h 31m 18.06s , +52d 43m 06.2s) | C | 60 | 18.0 |\n 1372 | 2023-11-08 21:25:31 | MASTER-Tavrida | (07h 05m 56.42s , +56d 31m 58.2s) | C | 60 | 18.3 |\n 1443 | 2023-11-08 21:26:42 | MASTER-Tavrida | (07h 20m 17.36s , +56d 31m 56.2s) | C | 60 | 18.2 |\n 1515 | 2023-11-08 21:27:54 | MASTER-Tavrida | (07h 23m 34.52s , +60d 20m 59.5s) | C | 60 | 18.0 |\n 1586 | 2023-11-08 21:29:05 | MASTER-Tavrida | (07h 39m 47.47s , +60d 20m 21.4s) | C | 60 | 17.8 |\n 1657 | 2023-11-08 21:30:16 | MASTER-Tavrida | (07h 54m 11.87s , +60d 19m 38.5s) | C | 60 | 17.7 |\n 1729 | 2023-11-08 21:31:28 | MASTER-Tavrida | (08h 10m 24.47s , +60d 20m 04.0s) | C | 60 | 17.6 |\n 1803 | 2023-11-08 21:32:42 | MASTER-Tavrida | (07h 24m 08.22s , +50d 50m 33.9s) | C | 60 | 18.0 |\n 1841 | 2023-11-08 21:33:20 | MASTER-Kislovodsk | (07h 34m 21.20s , +50d 43m 19.2s) | C | 60 | 16.6 |\n 1841 | 2023-11-08 21:33:20 | MASTER-Kislovodsk | (07h 41m 01.95s , +50d 21m 23.1s) | C | 60 | 17.4 |\n 1875 | 2023-11-08 21:33:54 | MASTER-Tavrida | (07h 36m 46.36s , +50d 49m 37.0s) | C | 60 | 18.0 |\n 1921 | 2023-11-08 21:34:40 | MASTER-Kislovodsk | (07h 51m 19.72s , +44d 59m 47.5s) | C | 60 | 16.8 |\n 1921 | 2023-11-08 21:34:40 | MASTER-Kislovodsk | (07h 57m 16.39s , +44d 37m 42.0s) | C | 60 | 17.5 |\n 1949 | 2023-11-08 21:35:08 | MASTER-Tavrida | (08h 55m 55.56s , +56d 33m 53.9s) | C | 60 | 17.9 |\n 2021 | 2023-11-08 21:36:20 | MASTER-Tavrida | (09h 10m 18.52s , +56d 33m 19.6s) | C | 60 | 18.2 |\n 2097 | 2023-11-08 21:37:36 | MASTER-Tavrida | (07h 42m 19.94s , +45d 09m 22.0s) | C | 60 | 18.2 |\n 2162 | 2023-11-08 21:38:41 | MASTER-Kislovodsk | (07h 39m 52.01s , +48d 48m 22.7s) | C | 60 | 16.5 |\n 2162 | 2023-11-08 21:38:41 | MASTER-Kislovodsk | (07h 46m 17.64s , +48d 25m 48.5s) | C | 60 | 17.1 |\n 2169 | 2023-11-08 21:38:48 | MASTER-Tavrida | (07h 53m 44.90s , +45d 08m 34.5s) | C | 60 | 17.8 |\n 2242 | 2023-11-08 21:40:01 | MASTER-Tavrida | (07h 30m 07.03s , +48d 55m 08.5s) | C | 60 | 17.6 |\n 2313 | 2023-11-08 21:41:12 | MASTER-Tavrida | (07h 42m 21.32s , +48d 55m 44.2s) | C | 60 | 16.0 |\n 2387 | 2023-11-08 21:42:26 | MASTER-Tavrida | (08h 26m 24.41s , +58d 27m 47.7s) | C | 60 | 16.1 |\n 2442 | 2023-11-08 21:43:21 | MASTER-Kislovodsk | (07h 45m 24.66s , +46d 55m 03.8s) | C | 60 | 16.1 |\n 2442 | 2023-11-08 21:43:21 | MASTER-Kislovodsk | (07h 51m 43.59s , +46d 32m 21.3s) | C | 60 | 16.8 |\n 2522 | 2023-11-08 21:44:41 | MASTER-Kislovodsk | (07h 16m 39.36s , +48d 50m 58.1s) | C | 60 | 16.5 |\n 2522 | 2023-11-08 21:44:41 | MASTER-Kislovodsk | (07h 23m 14.68s , +48d 28m 27.8s) | C | 60 | 17.4 |\n 2700 | 2023-11-08 21:47:39 | MASTER-Kislovodsk | (08h 38m 03.68s , +60d 10m 24.2s) | C | 60 | 16.8 |\n 2700 | 2023-11-08 21:47:39 | MASTER-Kislovodsk | (08h 46m 08.40s , +59d 47m 15.1s) | C | 60 | 17.1 |\n 2781 | 2023-11-08 21:49:00 | MASTER-Kislovodsk | (07h 10m 14.57s , +50d 43m 56.5s) | C | 60 | 17.2 |\n 2781 | 2023-11-08 21:49:00 | MASTER-Kislovodsk | (07h 17m 04.93s , +50d 20m 54.9s) | C | 60 | 18.0 |\n 2861 | 2023-11-08 21:50:20 | MASTER-Kislovodsk | (08h 37m 49.04s , +62d 06m 20.5s) | C | 60 | 17.3 |\n 2861 | 2023-11-08 21:50:20 | MASTER-Kislovodsk | (08h 46m 22.33s , +61d 43m 10.1s) | C | 60 | 18.1 |\n 3598 | 2023-11-08 22:02:37 | MASTER-Tavrida | (07h 07m 06.37s , +48d 56m 06.0s) | C | 60 | 17.5 |\n 3670 | 2023-11-08 22:03:48 | MASTER-Tavrida | (07h 19m 09.33s , +48d 55m 23.7s) | C | 60 | 18.2 |\n 3996 | 2023-11-08 22:09:15 | MASTER-Tavrida | (08h 21m 11.38s , +39d 28m 23.8s) | C | 60 | 17.4 |\n 4068 | 2023-11-08 22:10:27 | MASTER-Tavrida | (08h 31m 25.38s , +39d 27m 39.7s) | C | 60 | 16.8 |\n 4284 | 2023-11-08 22:14:03 | MASTER-Kislovodsk | (07h 39m 42.05s , +48d 51m 53.7s) | C | 60 | 16.5 |\n 4284 | 2023-11-08 22:14:03 | MASTER-Kislovodsk | (07h 46m 17.94s , +48d 29m 56.6s) | C | 60 | 17.0 |\n 4565 | 2023-11-08 22:18:44 | MASTER-Kislovodsk | (08h 15m 52.11s , +37d 24m 43.5s) | C | 60 | 17.0 |\n 4565 | 2023-11-08 22:18:44 | MASTER-Kislovodsk | (08h 21m 17.67s , +37d 01m 28.1s) | C | 60 | 17.7 |\n 4646 | 2023-11-08 22:20:05 | MASTER-Kislovodsk | (07h 45m 27.64s , +46d 55m 38.6s) | C | 60 | 17.2 |\n 4726 | 2023-11-08 22:21:25 | MASTER-Kislovodsk | (07h 16m 39.80s , +48d 53m 09.4s) | C | 60 | 17.5 |\n 4726 | 2023-11-08 22:21:25 | MASTER-Kislovodsk | (07h 23m 18.67s , +48d 29m 33.5s) | C | 60 | 18.5 |\n 4807 | 2023-11-08 22:22:46 | MASTER-Kislovodsk | (08h 34m 10.45s , +45d 00m 17.2s) | C | 60 | 17.4 |\n 4807 | 2023-11-08 22:22:46 | MASTER-Kislovodsk | (08h 40m 14.69s , +44d 37m 05.3s) | C | 60 | 18.4 |\n 4908 | 2023-11-08 22:24:26 | MASTER-Kislovodsk | (08h 37m 40.72s , +60d 14m 38.6s) | C | 60 | 17.5 |\n 4908 | 2023-11-08 22:24:27 | MASTER-Kislovodsk | (08h 46m 15.67s , +59d 50m 31.7s) | C | 60 | 18.6 |\n 4988 | 2023-11-08 22:25:47 | MASTER-Kislovodsk | (08h 38m 01.60s , +60d 14m 42.4s) | C | 60 | 12.9 |\n 5068 | 2023-11-08 22:27:07 | MASTER-Kislovodsk | (08h 39m 18.47s , +60d 14m 44.7s) | C | 60 | 12.7 |\n 5229 | 2023-11-08 22:29:47 | MASTER-Kislovodsk | (09h 07m 27.65s , +58d 17m 04.4s) | C | 60 | 17.6 |\n 5309 | 2023-11-08 22:31:08 | MASTER-Kislovodsk | (08h 02m 58.59s , +64d 03m 13.4s) | C | 60 | 17.6 |\n 5309 | 2023-11-08 22:31:08 | MASTER-Kislovodsk | (08h 12m 44.36s , +63d 38m 25.5s) | C | 60 | 18.4 |\n 5389 | 2023-11-08 22:32:27 | MASTER-Kislovodsk | (08h 17m 56.79s , +43d 08m 54.7s) | C | 60 | 17.4 |\n 5389 | 2023-11-08 22:32:28 | MASTER-Kislovodsk | (08h 23m 50.17s , +42d 45m 50.1s) | C | 60 | 18.2 |\n 5678 | 2023-11-08 22:37:17 | MASTER-Kislovodsk | (08h 15m 59.32s , +37d 27m 13.7s) | C | 60 | 16.7 |\n 5678 | 2023-11-08 22:37:17 | MASTER-Kislovodsk | (08h 21m 23.66s , +37d 04m 11.4s) | C | 60 | 17.6 |\n 5783 | 2023-11-08 22:39:02 | MASTER-Kislovodsk | (08h 21m 27.77s , +37d 04m 10.7s) | C | 60 | 12.5 |\n 7153 | 2023-11-08 23:01:52 | MASTER-Kislovodsk | (07h 16m 32.57s , +48d 54m 57.5s) | C | 60 | 17.1 |\n 7153 | 2023-11-08 23:01:52 | MASTER-Kislovodsk | (07h 23m 16.95s , +48d 32m 15.3s) | C | 60 | 18.0 |\n 7233 | 2023-11-08 23:03:12 | MASTER-Kislovodsk | (08h 34m 11.17s , +45d 02m 42.3s) | C | 60 | 17.0 |\n 7233 | 2023-11-08 23:03:12 | MASTER-Kislovodsk | (08h 40m 19.67s , +44d 40m 22.7s) | C | 60 | 18.1 |\n 7313 | 2023-11-08 23:04:32 | MASTER-Kislovodsk | (08h 37m 30.25s , +60d 15m 20.3s) | C | 60 | 17.5 |\n 7313 | 2023-11-08 23:04:32 | MASTER-Kislovodsk | (08h 46m 11.06s , +59d 51m 10.8s) | C | 60 | 18.4 |\n 7398 | 2023-11-08 23:05:57 | MASTER-Kislovodsk | (07h 17m 05.18s , +50d 24m 16.2s) | C | 60 | 18.3 |\n 7398 | 2023-11-08 23:05:57 | MASTER-Kislovodsk | (07h 10m 06.06s , +50d 47m 43.7s) | C | 60 | 17.4 |\n 7525 | 2023-11-08 23:08:04 | MASTER-Kislovodsk | (08h 37m 12.79s , +62d 10m 55.8s) | C | 60 | 17.6 |\n 7525 | 2023-11-08 23:08:04 | MASTER-Kislovodsk | (08h 46m 26.67s , +61d 46m 55.0s) | C | 60 | 18.3 |\n 7685 | 2023-11-08 23:10:44 | MASTER-Kislovodsk | (09h 07m 21.85s , +58d 21m 24.3s) | C | 60 | 17.6 |\n 7765 | 2023-11-08 23:12:04 | MASTER-Kislovodsk | (08h 02m 45.90s , +64d 05m 19.3s) | C | 60 | 17.9 |\n 7765 | 2023-11-08 23:12:04 | MASTER-Kislovodsk | (08h 12m 37.53s , +63d 41m 30.2s) | C | 60 | 18.7 |\n 7845 | 2023-11-08 23:13:24 | MASTER-Kislovodsk | (08h 17m 51.40s , +43d 10m 18.8s) | C | 60 | 17.9 |\n 7845 | 2023-11-08 23:13:24 | MASTER-Kislovodsk | (08h 23m 50.55s , +42d 48m 05.9s) | C | 60 | 19.0 |\n 7925 | 2023-11-08 23:14:44 | MASTER-Kislovodsk | (08h 18m 19.23s , +43d 10m 19.8s) | C | 60 | 12.4 |\n 8113 | 2023-11-08 23:17:52 | MASTER-Kislovodsk | (08h 55m 39.82s , +45d 01m 39.6s) | C | 60 | 15.9 |\n 8193 | 2023-11-08 23:19:12 | MASTER-Kislovodsk | (07h 57m 05.13s , +43d 10m 45.3s) | C | 60 | 16.0 |\n 8194 | 2023-11-08 23:19:12 | MASTER-Kislovodsk | (08h 03m 05.80s , +42d 48m 44.1s) | C | 60 | 16.7 |\n 8285 | 2023-11-08 23:20:44 | MASTER-Kislovodsk | (08h 37m 25.88s , +64d 03m 39.7s) | C | 60 | 15.4 |\n 8285 | 2023-11-08 23:20:44 | MASTER-Kislovodsk | (08h 47m 15.02s , +63d 39m 31.6s) | C | 60 | 15.8 |\n 8366 | 2023-11-08 23:22:04 | MASTER-Kislovodsk | (07h 32m 20.23s , +62d 12m 43.9s) | C | 60 | 15.4 |\n 8366 | 2023-11-08 23:22:05 | MASTER-Kislovodsk | (07h 41m 38.41s , +61d 49m 17.0s) | C | 60 | 16.1 |\n 9869 | 2023-11-08 23:47:08 | MASTER-Kislovodsk | (09h 07m 19.25s , +58d 22m 40.1s) | C | 60 | 16.9 |\n 9949 | 2023-11-08 23:48:28 | MASTER-Kislovodsk | (08h 02m 39.15s , +64d 05m 19.2s) | C | 60 | 16.7 |\n 9949 | 2023-11-08 23:48:28 | MASTER-Kislovodsk | (08h 12m 32.76s , +63d 41m 18.6s) | C | 60 | 17.1 |\n 10029 | 2023-11-08 23:49:48 | MASTER-Kislovodsk | (08h 17m 53.96s , +43d 09m 43.9s) | C | 60 | 17.2 |\n 10029 | 2023-11-08 23:49:48 | MASTER-Kislovodsk | (08h 23m 56.08s , +42d 47m 03.5s) | C | 60 | 18.2 |\n 10109 | 2023-11-08 23:51:08 | MASTER-Kislovodsk | (08h 38m 39.91s , +43d 10m 47.4s) | C | 60 | 17.1 |\n 10109 | 2023-11-08 23:51:08 | MASTER-Kislovodsk | (08h 44m 40.28s , +42d 48m 02.0s) | C | 60 | 17.9 |\n 10189 | 2023-11-08 23:52:28 | MASTER-Kislovodsk | (08h 55m 33.63s , +45d 02m 33.8s) | C | 60 | 17.1 |\n 10270 | 2023-11-08 23:53:49 | MASTER-Kislovodsk | (07h 57m 05.41s , +43d 12m 03.4s) | C | 60 | 16.5 |\n 10270 | 2023-11-08 23:53:49 | MASTER-Kislovodsk | (08h 03m 08.76s , +42d 49m 11.7s) | C | 60 | 17.2 |\n 10350 | 2023-11-08 23:55:09 | MASTER-Kislovodsk | (08h 37m 17.03s , +64d 05m 34.1s) | C | 60 | 16.1 |\n 10350 | 2023-11-08 23:55:09 | MASTER-Kislovodsk | (08h 47m 10.35s , +63d 41m 13.8s) | C | 60 | 16.6 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34970.",
"published": "2023-11-09T00:01:40.860227Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-09T00:01:40.860259Z",
"modified": "2023-11-09T00:01:40.867758Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6347,
"topic": "gcn.circular",
"uuid": "e7bf7714-3b4e-48fb-9127-1dadff6dedad",
"title": "X-ray transient LXT 240402A: WFST optical upper limitsâ",
"submitter": "Hop gcn.circular",
"authors": "Tianrui Sun at Purple Mountain Obs,CAS <trsun@pmo.ac.cn>",
"data": {
"date": "24/04/04 17:04:26 GMT",
"from": "Tianrui Sun at Purple Mountain Obs,CAS <trsun@pmo.ac.cn>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36029"
},
"title": "GCN CIRCULAR",
"number": "36029",
"subject": "X-ray transient LXT 240402A: WFST optical upper limitsâ"
},
"message_text": "Tian-Rui Sun, Jin-Jun Geng, Min-Xuan Cai, Zheng-Yan Liu, Ye Li, Xue-Feng Wu report on behalf of the WFST Collaboration:\n\nFollowing the detection of LXT 240402A by Leia (Xu et al. GCN 36016, Jia et al. GCN 36022) and FXT on board Einstein Probe (Jia et al. GCN 36022) ,VLT (Levan et al. GCN 36025) , we carried out image observations using the newly deployed Wide Field Survey Telescope (WFST Collaboration; arXiv:2306.07590) at Lenghu Astronomical Observation Base (Qinghai province, China) to search and follow up its afterglow in the error box.\n\nWe observed the target position with a total exposure of 1200s in g-band starting from 2024-04-03T19:28:35.\nNo new optical source was detected within the error box (Jia et al. GCN 36022) down to 23.8 mag in the coadded image.\n\nOur non-detection is consistent with the results from the GWAC-F50A (Xin et al., GCN 36018), MASTER (Lipunov et al. GCN 36019), Kinder (Yang et al. GCN 36027) limits. \nAs Yang noticed in GCN 36027, upon visual inspection, we also found that the star (SDSS J162148.18+254546.5) appears to have a broader profile. \n\nWe used the PanStarrs DR1 (Flewelling,2020) catalog as the magnitude reference for calibration.\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36029.",
"published": "2024-04-04T17:04:47.389333Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-04T17:04:47.389346Z",
"modified": "2024-04-04T17:04:47.395662Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6681,
"topic": "gcn.circular",
"uuid": "2b683dbd-5ad3-40cd-bfe7-6b9b974bf381",
"title": "GRB 240419A: VLT/UVES redshift of z = 5.178",
"submitter": "Hop gcn.circular",
"authors": "Benjamin Schneider at MIT <bschn@mit.edu>",
"data": {
"date": "24/04/19 10:34:58 GMT",
"from": "Benjamin Schneider at MIT <bschn@mit.edu>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36176"
},
"title": "GCN CIRCULAR",
"number": "36176",
"subject": "GRB 240419A: VLT/UVES redshift of z = 5.178"
},
"message_text": "B. Schneider (MIT), L. Izzo (INAF-Napoli & DARK/NBI), A. Saccardi (GEPI/Obs. de Paris), D. B. Malesani (DAWN/NBI and Radboud Univ.), J. T. Palmerio (GEPI, Obs. de Paris), A. de Ugarte Postigo (CNRS, OCA, LAM), V. D'Elia (ASI/SSDC & INAF-OAR), N. Gaspari (Radboud Univ.), P. Schady (Univ. of Bath), S. Covino (INAF/Brera), N. R. Tanvir (Univ. Leicester), A. J. Levan (Radboud Univ.), B. P. Gompertz (Birmingham), report on behalf of the Stargate collaboration:\n\nWe observed the optical afterglow of GRB 240419A (Siegel et al., GCN 36169; Schneider et al., GCN 36175) using the ESO VLT UT2 (Kueyen) equipped with the UVES high-resolution spectrograph. Observations were automatically performed via the rapid-response mode (RRM) system. The observations consisted of a series of spectra taken on April 19 with the first one starting at 02:15:42 UT (27.7 min after the GRB). The spectra cover a wavelength range from 3700 to 9300 AA and were obtained at a relatively high airmass of 2.4.\n\nIn the spectrum of 700 s, we only detect a continuum in the upper chip of the red arm (7770 to 9300 AA). From the detection of multiple absorption features, which we interpret as being due to SII, OI, Si II, Si II*, CII, CII*, Si IV, we infer a common redshift of z = 5.178. We conclude this is the redshift of the burst. This is consistent with the absence of flux in the blue dichroic, which covers the wavelength range from 3300 to 5000 AA, and which is entirely blue-ward of the Lyman break at z = 5.178. We also note the presence of additional absorption features likely due multiple intervening systems.\n\nWe acknowledge expert support from the ESO staff in Paranal, in particular Jonathan Smoker and Diego Parraguez.\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36176.",
"published": "2024-04-19T10:35:20.100604Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-19T10:35:20.100631Z",
"modified": "2024-04-19T10:35:20.109071Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6348,
"topic": "gcn.circular",
"uuid": "9eded558-31ae-4314-bd5b-93b55b43015f",
"title": "LXT 240402A/GRB 240402B: Glowbug gamma-ray detection",
"submitter": "Hop gcn.circular",
"authors": "C.C. Cheung at Naval Research Lab <Teddy.Cheung@nrl.navy.mil>",
"data": {
"date": "24/04/04 19:13:46 GMT",
"from": "C.C. Cheung at Naval Research Lab <Teddy.Cheung@nrl.navy.mil>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36030"
},
"title": "GCN CIRCULAR",
"number": "36030",
"subject": "LXT 240402A/GRB 240402B: Glowbug gamma-ray detection"
},
"message_text": "C.C. Cheung, R. Woolf, M. Kerr, J.E. Grove (NRL), A. Goldstein (USRA), C.A. Wilson-Hodge, D. Kocevski (MSFC), and M.S. Briggs (UAH) report:\n \nThe Glowbug gamma-ray telescope [1,2], operating on the International Space Station, reports the detection of LXT 240402A/GRB 240402B, which was also detected by LEIA (GCN 36016), GECAM-C (GCN 36017), and Konus/Wind (GCN 36028).\n \nUsing an adaptive window with a resolution of 32-ms, the burst onset is determined to be 2024-04-02 08:47:45.240 with a duration of 4.1 s and a total significance of about 18.3 sigma. The light curve comprises two primary peaks at ~T0+0.5s and ~T0+3s.\n \nThe analysis results presented here are preliminary and use a response function that lacks a detailed characterization of the surrounding passive structure of the ISS.\n \nGlowbug is a NASA-funded technology demonstrator for sensitive, low-cost gamma-ray transient telescopes developed, built, and operated by the U.S. Naval Research Laboratory (NRL) with support from the University of Alabama in Huntsville, USRA, and NASA MSFC. It was launched on 2023 March 15 aboard the Department of Defense Space Test Programâs STP-H9 to the ISS. The detector comprises 12 large-area (15 cm x 15 cm) CsI:Tl panels covering the surface of a half cube, and two hexagonal (5-cm diameter, 10-cm length) CLLB scintillators, giving it a large field of view (instantaneous FoV ~2/3 sky) over a wide energy band of 50 keV to >2 MeV.\n \n[1] Grove, J.E. et al. 2020, Proc. Yamada Conf. LXXI, arXiv:2009.11959\n[2] Woolf, R.S. et al. 2022, Proc. SPIE, 12181, id. 121811O\n[3] Goldstein, A. et al. 2020, ApJ 895, 40, arXiv :1909.03006\n \nDistribution Statement A: Approved for public release. Distribution is unlimited.\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36030.",
"published": "2024-04-04T19:14:02.986526Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-04T19:14:02.986544Z",
"modified": "2024-04-04T19:14:02.996187Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6349,
"topic": "gcn.circular",
"uuid": "5fcc85b3-ee16-45f1-a4b2-3eeb3cf64124",
"title": "GRB 240403A: Glowbug gamma-ray detection",
"submitter": "Hop gcn.circular",
"authors": "C.C. Cheung at Naval Research Lab <Teddy.Cheung@nrl.navy.mil>",
"data": {
"date": "24/04/04 21:35:35 GMT",
"from": "C.C. Cheung at Naval Research Lab <Teddy.Cheung@nrl.navy.mil>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36031"
},
"title": "GCN CIRCULAR",
"number": "36031",
"subject": "GRB 240403A: Glowbug gamma-ray detection"
},
"message_text": "C.C. Cheung, R. Woolf, M. Kerr, J.E. Grove (NRL), A. Goldstein (USRA), C.A. Wilson-Hodge, D. Kocevski (MSFC), and M.S. Briggs (UAH) report:\n \nThe Glowbug gamma-ray telescope [1,2], operating on the International Space Station, reports the detection of GRB 240403A, which was also detected by Fermi/GBM (GCN 36015, 36024). \n\nUsing an adaptive window with a resolution of 32-ms, the burst onset is determined to be 2024-04-03 11:57:53.912 with a duration of 7.2 s and a total significance of about 31.9 sigma. The Glowbug onset corresponds to the main emission peak seen in the GBM light curve (GCN 36024).\n\nThe analysis results presented here are preliminary and use a response function that lacks a detailed characterization of the surrounding passive structure of the ISS.\n \nGlowbug is a NASA-funded technology demonstrator for sensitive, low-cost gamma-ray transient telescopes developed, built, and operated by the U.S. Naval Research Laboratory (NRL) with support from the University of Alabama in Huntsville, USRA, and NASA MSFC. It was launched on 2023 March 15 aboard the Department of Defense Space Test Programâs STP-H9 to the ISS. The detector comprises 12 large-area (15 cm x 15 cm) CsI:Tl panels covering the surface of a half cube, and two hexagonal (5-cm diameter, 10-cm length) CLLB scintillators, giving it a large field of view (instantaneous FoV ~2/3 sky) over a wide energy band of 50 keV to >2 MeV.\n \n[1] Grove, J.E. et al. 2020, Proc. Yamada Conf. LXXI, arXiv:2009.11959\n[2] Woolf, R.S. et al. 2022, Proc. SPIE, 12181, id. 121811O\n[3] Goldstein, A. et al. 2020, ApJ 895, 40, arXiv :1909.03006\n \nDistribution Statement A: Approved for public release. Distribution is unlimited.\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36031.",
"published": "2024-04-04T21:35:53.730837Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-04T21:35:53.730852Z",
"modified": "2024-04-04T21:35:53.738691Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6350,
"topic": "gcn.circular",
"uuid": "74d920ec-bb6e-4093-af4f-5316ba62f54d",
"title": "GRB 240403B: Glowbug gamma-ray detection",
"submitter": "Hop gcn.circular",
"authors": "C.C. Cheung at Naval Research Lab <Teddy.Cheung@nrl.navy.mil>",
"data": {
"date": "24/04/04 21:36:45 GMT",
"from": "C.C. Cheung at Naval Research Lab <Teddy.Cheung@nrl.navy.mil>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36032"
},
"title": "GCN CIRCULAR",
"number": "36032",
"subject": "GRB 240403B: Glowbug gamma-ray detection"
},
"message_text": "C.C. Cheung, R. Woolf, M. Kerr, J.E. Grove (NRL), A. Goldstein (USRA), C.A. Wilson-Hodge, D. Kocevski (MSFC), and M.S. Briggs (UAH) report:\n \nThe Glowbug gamma-ray telescope [1,2], operating on the International Space Station, reports the detection of GRB 240403B, which was also detected by Fermi/GBM (Trigger 733808041). \n\nUsing an adaptive window with a resolution of 32-ms, the burst onset is determined to be 2024-04-03 03:33:50.176 with a duration of 26.6 s and a total significance of about 57 sigma. The light curve shows a gradual increase in flux (uncertain between ~T0+20s to ~T0+23s because of detector dead-time) with a sharp peak at ~T0+25s.\n\nThe analysis results presented here are preliminary and use a response function that lacks a detailed characterization of the surrounding passive structure of the ISS.\n \nGlowbug is a NASA-funded technology demonstrator for sensitive, low-cost gamma-ray transient telescopes developed, built, and operated by the U.S. Naval Research Laboratory (NRL) with support from the University of Alabama in Huntsville, USRA, and NASA MSFC. It was launched on 2023 March 15 aboard the Department of Defense Space Test Programâs STP-H9 to the ISS. The detector comprises 12 large-area (15 cm x 15 cm) CsI:Tl panels covering the surface of a half cube, and two hexagonal (5-cm diameter, 10-cm length) CLLB scintillators, giving it a large field of view (instantaneous FoV ~2/3 sky) over a wide energy band of 50 keV to >2 MeV.\n \n[1] Grove, J.E. et al. 2020, Proc. Yamada Conf. LXXI, arXiv:2009.11959\n[2] Woolf, R.S. et al. 2022, Proc. SPIE, 12181, id. 121811O\n[3] Goldstein, A. et al. 2020, ApJ 895, 40, arXiv :1909.03006\n \nDistribution Statement A: Approved for public release. Distribution is unlimited.\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36032.",
"published": "2024-04-04T21:36:51.829935Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-04T21:36:51.829956Z",
"modified": "2024-04-04T21:36:51.837297Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4469,
"topic": "gcn.circular",
"uuid": "ad5963d4-273b-40e4-abb0-48a8fbac45bd",
"title": "Fermi trigger No 721204446: 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": "23/11/09 17:16:48 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34971"
},
"title": "GCN CIRCULAR",
"number": "34971",
"subject": "Fermi trigger No 721204446: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko,\nG.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gress, N.M. Budnev, O.Ershova\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,\nA.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nV. Yurkov, A. Gabovich\n(Blagoveschensk Educational State University)\n\nMASTER-Tunka robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the Fermi GRB231109.27 (trigger No 721204446,11h 32m 09.60s , +50d 39m 36.0s, R=6.78) errorbox 33843 sec after notice time and 33877 sec after trigger time at 2023-11-09 15:58:38 UT, with upper limit up to 18.4 mag. The observations began at zenith distance = 68 deg. The sun altitude is -54.3 deg.\n\nMASTER-Tavrida robotic telescope located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB231109.27 errorbox 35379 sec after notice time and 35412 sec after trigger time at 2023-11-09 16:24:14 UT, with upper limit up to 17.9 mag. The observations began at zenith distance = 80 deg. The sun altitude is -21.9 deg.\n\nThe galactic latitude b = 63 deg., longitude l = 150 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id\"98669\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 33907 | 2023-11-09 15:58:38 | MASTER-Tunka | (10h 38m 55.16s , +51d 51m 44.7s) | C | 60 | 18.2 |\n 34066 | 2023-11-09 16:01:17 | MASTER-Tunka | (10h 38m 55.81s , +51d 51m 48.2s) | C | 60 | 18.4 |\n 35443 | 2023-11-09 16:24:14 | MASTER-Tavrida | (11h 08m 52.02s , +55d 12m 05.7s) | C | 60 | 17.6 |\n 35540 | 2023-11-09 16:25:51 | MASTER-Tavrida | (10h 50m 51.36s , +53d 36m 40.8s) | C | 60 | 16.3 |\n 35615 | 2023-11-09 16:27:06 | MASTER-Tavrida | (11h 36m 09.37s , +51d 42m 26.6s) | C | 60 | 15.9 |\n 35803 | 2023-11-09 16:30:13 | MASTER-Tavrida | (11h 24m 08.13s , +55d 31m 37.8s) | C | 60 | 16.8 |\n 35876 | 2023-11-09 16:31:27 | MASTER-Tavrida | (11h 43m 06.90s , +53d 36m 29.6s) | C | 60 | 16.5 |\n 36142 | 2023-11-09 16:35:53 | MASTER-Tavrida | (11h 54m 36.65s , +49d 48m 33.5s) | C | 60 | 16.4 |\n 36296 | 2023-11-09 16:38:27 | MASTER-Tavrida | (11h 32m 48.13s , +57d 24m 58.9s) | C | 60 | 17.1 |\n 36791 | 2023-11-09 16:46:42 | MASTER-Tavrida | (11h 08m 50.56s , +55d 13m 25.7s) | C | 60 | 17.9 |\n 36886 | 2023-11-09 16:48:17 | MASTER-Tavrida | (11h 30m 48.16s , +53d 37m 36.5s) | C | 60 | 16.8 |\n 36980 | 2023-11-09 16:49:51 | MASTER-Tavrida | (10h 56m 33.35s , +55d 12m 14.3s) | C | 60 | 17.7 |\n 37075 | 2023-11-09 16:51:26 | MASTER-Tavrida | (11h 49m 22.79s , +51d 42m 31.3s) | C | 60 | 15.0 |\n 37262 | 2023-11-09 16:54:33 | MASTER-Tavrida | (11h 11m 07.09s , +55d 32m 03.0s) | C | 60 | 15.7 |\n 37356 | 2023-11-09 16:56:07 | MASTER-Tavrida | (11h 15m 33.97s , +57d 07m 41.2s) | C | 60 | 17.7 |\n 37451 | 2023-11-09 16:57:42 | MASTER-Tavrida | (11h 38m 37.33s , +55d 31m 50.7s) | C | 60 | 16.6 |\n 37545 | 2023-11-09 16:59:15 | MASTER-Tavrida | (11h 34m 57.05s , +55d 11m 31.0s) | C | 60 | 16.3 |\n 37639 | 2023-11-09 17:00:50 | MASTER-Tavrida | (11h 56m 57.45s , +53d 36m 47.0s) | C | 60 | 16.1 |\n 37832 | 2023-11-09 17:04:03 | MASTER-Tavrida | (11h 19m 11.43s , +57d 25m 42.8s) | C | 60 | 14.5 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34971.",
"published": "2023-11-09T17:17:05.250282Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-09T17:17:05.250314Z",
"modified": "2023-11-09T17:17:05.262784Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4471,
"topic": "gcn.circular",
"uuid": "c9cfaf63-67de-4c30-bfeb-12b1089da3b1",
"title": "LIGO/Virgo/KAGRA S231108u: Updated Sky localization",
"submitter": "Hop gcn.circular",
"authors": "Colm Talbot at University of Chicago <talbotcolm@gmail.com>",
"data": {
"date": "23/11/09 17:54:08 GMT",
"from": "Colm Talbot at University of Chicago <talbotcolm@gmail.com>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34972"
},
"title": "GCN CIRCULAR",
"number": "34972",
"subject": "LIGO/Virgo/KAGRA S231108u: 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 S231108u (GCN Circular 34967). 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/S231108u\n\nFor the Bilby.multiorder.fits,0 sky map, the 90% credible region is 949 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 1986 +/- 494 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) and Morisaki et al. arXiv:2307.13380 (2023)\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34972.",
"published": "2023-11-09T17:54:18.268866Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-09T17:54:18.268897Z",
"modified": "2023-11-09T17:54:18.275947Z",
"nonlocalizedevents": [
{
"event_id": "S231108u"
}
],
"targets": []
},
{
"id": 4476,
"topic": "gcn.circular",
"uuid": "6038cceb-cd1b-4764-9bca-b611fbd99453",
"title": "IceCube-231103A: No candidates from the Zwicky Transient Facility",
"submitter": "Hop gcn.circular",
"authors": "Robert Stein at Caltech <rdstein@astro.caltech.edu>",
"data": {
"date": "23/11/09 18:56:46 GMT",
"from": "Robert Stein at Caltech <rdstein@astro.caltech.edu>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34973"
},
"title": "GCN CIRCULAR",
"number": "34973",
"subject": "IceCube-231103A: No candidates from the Zwicky Transient Facility"
},
"message_text": "Robert Stein (Caltech), Sven Weimann (Ruhr University Bochum), Anna Franckowiak (DESY/Ruhr University Bochum), Jannis Necker (DESY), Simeon Reusch (DESY), Jesper Sollerman (OKC), Theophile du Laz (Caltech) report:\n\nOn behalf of the Zwicky Transient Facility (ZTF) and Global Relay of Observatories Watching Transients Happen (GROWTH) collaborations:\n\nAs part of the ZTF neutrino follow up program (Stein et al. 2023), we observed the localization region of the neutrino event IceCube-231103A (Blaufuss et. al, GCN 34933) with the Palomar 48-inch telescope, equipped with the 47 square degree ZTF camera (Bellm et al. 2019, Graham et al. 2019). We started observations in the g- and r-band beginning at 2023-11-03 09:24 UTC, approximately 0.1 hours after event time. We covered 84.1% (12.9 sq deg) of the reported localization region. This estimate accounts for chip gaps. Each exposure was 300s with a typical depth of 21.0 mag.\n\nThe images were processed in real-time through the ZTF reduction and image subtraction pipelines at IPAC to search for potential counterparts (Masci et al. 2019). AMPEL (Nordin et al. 2019, Stein et al. 2021) was used to search the alerts database for candidates. We reject stellar sources (Tachibana and Miller 2018) and moving objects, and apply machine learning algorithms (Mahabal et al. 2019). After removing low-level AGN variability, we are left with one following high-significance transient candidate by our pipeline, lying within the 90.0% localization of the skymap:\n\n+--------------------------------------------------------------------------------+\n| ZTF Name | IAU Name | RA (deg) | DEC (deg) | Filter | Mag | MagErr |\n+--------------------------------------------------------------------------------+\n| ZTF23abnoapt | AT2023wue | 102.9192032 | +48.0780348 | g | 17.98 | 0.05 |\n+--------------------------------------------------------------------------------+\n\nZTF23abnoapt was first detected on 2023-10-27, with a fast rise, slow decay and blue colour resembling a CV. We obtained a follow-up spectrum with the SEDm (Blagorodnova et al. 2018), which confirmed a blue continuum as expected for a CV, and a SNID best-fit to a galactic source. We therefore consider it likely that ZTF23abnoapt is unrelated to the neutrino.\n\nWe note that one additional variable source in the localisation, ZTF19aaenfez, appears to be undergoing an extended optical flare. The source is WISE-detected (WISEA J065203.55+473924.6), and is a probable AGN based on WISE colours (W1-W2=0.95). The source is approximately 50% brighter in flux than the median across the 5-year baseline of ZTF. The flare has been ongoing for over one year in ZTF data.\n\nZTF and GROWTH are worldwide collaborations comprising Caltech, USA; IPAC, USA; WIS, Israel; OKC, Sweden; JSI/UMd, USA; DESY, Germany; TANGO, Taiwan; UW Milwaukee, USA; LANL, USA; TCD, Ireland; IN2P3, France.\n\nGROWTH acknowledges generous support of the NSF under PIRE Grant No 1545949.\nAlert distribution service provided by DIRAC@UW (Patterson et al. 2019).\nAlert database searches are done by AMPEL (Nordin et al. 2019).\nAlert filtering is performed with the nuztf (Stein et al. 2021, https://github.com/desy-multimessenger/nuztf ).\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34973.",
"published": "2023-11-09T18:56:56.592942Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-09T18:56:56.592961Z",
"modified": "2023-11-09T18:56:56.604001Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4481,
"topic": "gcn.circular",
"uuid": "937bdff0-9586-40d7-bc98-9ac33087c219",
"title": "GRB 231109A: Fermi GBM Final Localization",
"submitter": "Hop gcn.circular",
"authors": "Christian Malacaria at ISSI <cmalacaria.astro@gmail.com>",
"data": {
"date": "23/11/09 19:57:25 GMT",
"from": "Christian Malacaria at ISSI <cmalacaria.astro@gmail.com>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34974"
},
"title": "GCN CIRCULAR",
"number": "34974",
"subject": "GRB 231109A: Fermi GBM Final Localization"
},
"message_text": "The Fermi GBM team reports the detection of a likely SHORT GRB.\n\nAt 06:34:01.34 UT on 9 Nov 2023, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 231109A (trigger 721204446 / 231109274).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA\n= 173.0, Dec = 50.7 (J2000 degrees, equivalent to J2000 11h 32m, 50d 42â),\nwith a statistical uncertainty of 6.8 degrees.\n\nThe angle from the Fermi LAT boresight is 143 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231109274/quicklook/glg_skymap_all_bn231109274.png\n\nThe HEALPix FITS file, including the estimated localization systematic, can\nbe found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231109274/quicklook/glg_healpix_all_bn231109274.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231109274/quicklook/glg_lc_medres34_bn231109274.gif\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34974.",
"published": "2023-11-09T19:57:35.835836Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-09T19:57:35.835854Z",
"modified": "2023-11-09T19:57:35.843312Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6874,
"topic": "gcn.circular",
"uuid": "b470c767-f1cc-4213-8715-22eeeee60536",
"title": "LIGO/Virgo/KAGRA S240423br: Retraction of GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "Irina Dvorkin <dvorkin@iap.fr>",
"data": {
"date": "24/04/23 11:54:40 GMT",
"from": "Irina Dvorkin <dvorkin@iap.fr>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36252"
},
"title": "GCN CIRCULAR",
"number": "36252",
"subject": "LIGO/Virgo/KAGRA S240423br: Retraction of GW compact binary merger candidate"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:\n\nThe trigger S240423br is no longer considered to be a candidate of interest. Looking at the data, the trigger was due to non-stationary noise in the LIGO Livingston detector. Pipeline and data quality experts recommended a retraction.\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36252.",
"published": "2024-04-23T11:54:55.773673Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-23T11:54:55.773688Z",
"modified": "2024-04-23T11:54:55.781346Z",
"nonlocalizedevents": [
{
"event_id": "S240423b"
}
],
"targets": []
},
{
"id": 4497,
"topic": "gcn.circular",
"uuid": "0ac32b74-df0b-4813-bdcc-19b7b95cb3f0",
"title": "LIGO/Virgo/KAGRA S231110g: Identification of a GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "Hsun-Chung.Wu at National Tsing Hua University <s103066703@gmail.com>",
"data": {
"date": "23/11/10 06:03:25 GMT",
"from": "Hsun-Chung.Wu at National Tsing Hua University <s103066703@gmail.com>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34975"
},
"title": "GCN CIRCULAR",
"number": "34975",
"subject": "LIGO/Virgo/KAGRA S231110g: Identification of a GW compact binary merger candidate"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:\n\nWe identified the compact binary merger candidate S231110g during real-time processing of data from LIGO Hanford Observatory (H1) and LIGO Livingston Observatory (L1) at 2023-11-10 04:03:20.221 UTC (GPS time: 1383624218.221). The candidate was found by the GstLAL [1], MBTA [2], PyCBC Live [3], and SPIIR [4] analysis pipelines.\n\nS231110g is an event of interest because its false alarm rate, as estimated by the online analysis, is 1.9e-08 Hz, or about one in 1 year, 7 months. The event's properties can be found at this URL:\n\nhttps://gracedb.ligo.org/superevents/S231110g\n\nThe classification of the GW signal, in order of descending probability, is BBH (97%), Terrestrial (3%), BNS (<1%), or NSBH (<1%).\n\nAssuming the candidate is astrophysical in origin, the probability that the lighter compact object is consistent with a neutron star mass (HasNS) is <1%. [5] Using the masses and spins inferred from the signal, the probability of matter outside the final compact object (HasRemnant) is <1%. [5] Both HasNS and HasRemnant consider the support of several neutron star equations of state. The probability that either of the binary components lies between 3 and 5 solar masses (HasMassgap) is <1%.\n\nTwo sky maps are available at this time and can be retrieved from the GraceDB event page:\n * bayestar.multiorder.fits,0, an initial localization generated by BAYESTAR [6], distributed via GCN notice about 33 seconds after the candidate event time.\n * bayestar.multiorder.fits,1, an initial localization generated by BAYESTAR [6], distributed via GCN notice about 5 minutes after the candidate event time.\n\nThe preferred sky map at this time is bayestar.multiorder.fits,1. For the bayestar.multiorder.fits,1 sky map, the 90% credible region is 1095 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 1949 +/- 542 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] Tsukada et al. PRD 108, 043004 (2023) and Ewing et al. arXiv:2305.05625 (2023)\n [2] Aubin et al. CQG 38, 095004 (2021)\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\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34975.",
"published": "2023-11-10T06:03:36.694877Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-10T06:03:36.694901Z",
"modified": "2023-11-10T06:03:36.707605Z",
"nonlocalizedevents": [
{
"event_id": "S231110g"
}
],
"targets": []
},
{
"id": 4679,
"topic": "gcn.circular",
"uuid": "e8bc912d-ff47-417b-bd7a-f690930aa422",
"title": "GRB 231114A (short): Glowbug gamma-ray detection",
"submitter": "Hop gcn.circular",
"authors": "C.C. Cheung at Naval Research Lab <Teddy.Cheung@nrl.navy.mil>",
"data": {
"date": "23/11/14 19:47:23 GMT",
"from": "C.C. Cheung at Naval Research Lab <Teddy.Cheung@nrl.navy.mil>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/35028"
},
"title": "GCN CIRCULAR",
"number": "35028",
"subject": "GRB 231114A (short): Glowbug gamma-ray detection"
},
"message_text": "C.C. Cheung, M. Kerr, J. E. Grove, R. Woolf (NRL), A. Goldstein (USRA), C.A. Wilson-Hodge (MSFC), and M.S. Briggs (UAH) report: \n \nThe Glowbug gamma-ray telescope [1,2], operating on the International Space Station, reports the detection of GRB 231114A, which was also detected by Fermi/GBM (GCN 35025).\n \nUsing an adaptive window with a resolution of 32-ms, the burst onset is determined to be 2023-11-14 09:18:39.280 with a duration of 0.256 s and a total significance of about 11.6 sigma. The light curve comprises a single peak.\n \nUsing a standard power-law function with an exponential high-energy cutoff [3] to model the emission over this duration results in a photon index dN/dE~E^x of x=-0.1 and a cutoff energy (\"Epeak\") of 421 keV. The modeled 10-10000 keV fluence is 1.5e-07 erg/cm^2.\n \nThe analysis results presented here are preliminary and use a response function that lacks a detailed characterization of the surrounding passive structure of the ISS.\n \nGlowbug is a NASA-funded technology demonstrator for sensitive, low-cost gamma-ray transient telescopes developed, built, and operated by the U.S. Naval Research Laboratory (NRL) with support from the University of Alabama in Huntsville, USRA, and NASA MSFC. It was launched on 2023 March 15 aboard the Department of Defense Space Test Programâs STP-H9 to the ISS. The detector comprises 12 large-area (15 cm x 15 cm) CsI:Tl panels covering the surface of a half cube, and two hexagonal (5-cm diameter, 10-cm length) CLLB scintillators, giving it a large field of view (instantaneous FoV ~2/3 sky) over a wide energy band of 50 keV to >2 MeV.\n \n[1] Grove, J.E. et al. 2020, Proc. Yamada Conf. LXXI, arXiv:2009.11959\n[2] Woolf, R.S. et al. 2022, Proc. SPIE, 12181, id. 121811O\n[3] Goldstein, A. et al. 2020, ApJ 895, 40, arXiv :1909.03006\n \nDistribution Statement A: Approved for public release. Distribution is unlimited.\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35028.",
"published": "2023-11-14T19:47:33.892766Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-14T19:47:33.892797Z",
"modified": "2023-11-14T19:47:33.902473Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4680,
"topic": "gcn.circular",
"uuid": "86e18b3c-0c05-490c-afba-d2af7b6345c6",
"title": "GRB 231113A (short): Glowbug gamma-ray detection",
"submitter": "Hop gcn.circular",
"authors": "C.C. Cheung at Naval Research Lab <Teddy.Cheung@nrl.navy.mil>",
"data": {
"date": "23/11/14 22:32:07 GMT",
"from": "C.C. Cheung at Naval Research Lab <Teddy.Cheung@nrl.navy.mil>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/35029"
},
"title": "GCN CIRCULAR",
"number": "35029",
"subject": "GRB 231113A (short): Glowbug gamma-ray detection"
},
"message_text": "C.C. Cheung, M. Kerr, J. E. Grove, R. Woolf (NRL), A. Goldstein (USRA), C.A. Wilson-Hodge (MSFC), and M.S. Briggs (UAH) report:\n \nThe Glowbug gamma-ray telescope [1,2], operating on the International Space Station, reports the detection of a short burst, GRB 231113A.\n \nUsing an adaptive window with a resolution of 32-ms, the burst onset is determined to be 2023-11-13 17:57:11.152 with a duration of 1.02 s and a total significance of about 17.1 sigma. The light curve comprises an initial, brighter peak at ~T0+0.4s and a secondary peak at ~T0+0.8s.\n \nUsing a standard power-law function with an exponential high-energy cutoff [3] to model the emission over this duration results in a photon index dN/dE~E^x of x=0.2 and a cutoff energy (\"Epeak\") of 496 keV. The modeled 10-10000 keV fluence is 5.8e-07 erg/cm^2.\n \nThe best-fit localization is RA, Decl. (J2000) = 153.5 deg, -65.4 deg with a radius of 24.7 deg (95% confidence), with a highly uncertain systematic uncertainty.\n \nThe analysis results presented here are preliminary and use a response function that lacks a detailed characterization of the surrounding passive structure of the ISS.\n \nGlowbug is a NASA-funded technology demonstrator for sensitive, low-cost gamma-ray transient telescopes developed, built, and operated by the U.S. Naval Research Laboratory (NRL) with support from the University of Alabama in Huntsville, USRA, and NASA MSFC. It was launched on 2023 March 15 aboard the Department of Defense Space Test Programâs STP-H9 to the ISS. The detector comprises 12 large-area (15 cm x 15 cm) CsI:Tl panels covering the surface of a half cube, and two hexagonal (5-cm diameter, 10-cm length) CLLB scintillators, giving it a large field of view (instantaneous FoV ~2/3 sky) over a wide energy band of 50 keV to >2 MeV.\n \n[1] Grove, J.E. et al. 2020, Proc. Yamada Conf. LXXI, arXiv:2009.11959\n[2] Woolf, R.S. et al. 2022, Proc. SPIE, 12181, id. 121811O\n[3] Goldstein, A. et al. 2020, ApJ 895, 40, arXiv :1909.03006\n \nDistribution Statement A: Approved for public release. Distribution is unlimited.\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35029.",
"published": "2023-11-14T22:32:18.314246Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-14T22:32:18.314266Z",
"modified": "2023-11-14T22:32:18.323312Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4506,
"topic": "gcn.circular",
"uuid": "007bccb4-e914-4717-9f82-a3753459c1c9",
"title": "LIGO/Virgo/KAGRA S231110g: Updated Sky localization",
"submitter": "Hop gcn.circular",
"authors": "Nelson Christensen at Obs.de la Cote dAzur,Nice <nelson.christensen@oca.eu>",
"data": {
"date": "23/11/10 16:59:29 GMT",
"from": "Nelson Christensen at Obs.de la Cote dAzur,Nice <nelson.christensen@oca.eu>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34976"
},
"title": "GCN CIRCULAR",
"number": "34976",
"subject": "LIGO/Virgo/KAGRA S231110g: 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 S231110g (GCN Circular 34975). 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/S231110g\n\nFor the Bilby.multiorder.fits,0 sky map, the 90% credible region is 636 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 1849 +/- 533 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) and Morisaki et al. arXiv:2307.13380 (2023)\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34976.",
"published": "2023-11-10T16:59:46.115797Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-10T16:59:46.115816Z",
"modified": "2023-11-10T16:59:46.123507Z",
"nonlocalizedevents": [
{
"event_id": "S231110g"
}
],
"targets": []
},
{
"id": 4513,
"topic": "gcn.circular",
"uuid": "e503f089-0a5c-4739-bb34-0e77dc665ef3",
"title": "GRB 231110A: Swift detection of a burst",
"submitter": "Hop gcn.circular",
"authors": "Jamie Kennea at Penn State <jak51@psu.edu>",
"data": {
"date": "23/11/10 21:35:09 GMT",
"from": "Jamie Kennea at Penn State <jak51@psu.edu>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34977"
},
"title": "GCN CIRCULAR",
"number": "34977",
"subject": "GRB 231110A: Swift detection of a burst"
},
"message_text": "\nV. D'Elia (SSDC & INAF-OAR), E. Ambrosi (INAF-IASFPA),\nA. D'Ai (INAF-IASFPA), S. Dichiara (PSU), J.D. Gropp (PSU),\nJ. A. Kennea (PSU), A. Melandri (INAF-OAR) and M. A. Williams (PSU)\nreport on behalf of the Neil Gehrels Swift Observatory Team:\n\nAt 21:19:34 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 231110A (trigger\u001195733). Swift did not slew immediately\nto the burst due to an observing constraint.\nThe BAT on-board calculated location is\nRA, Dec 356.296, +82.621 which is\n RA(J2000) = 23h 45m 11s\n Dec(J2000) = +82d 37' 16\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including\nsystematic uncertainty). The BAT light curve showed a single-peaked\nstructure with a duration of about 20 sec. The peak count rate\nwas ~2800 counts/sec (15-350 keV), at ~1 sec after the trigger.\n\nDue to an observing constraint, Swift will not slew until T0+50.7\nminutes. There will be no XRT or UVOT data until this time.\n\nBurst Advocate for this burst is V. D'Elia (valerio.delia AT ssdc.asi.it).\nPlease contact the BA by email if you require additional information\nregarding Swift followup of this burst. In extremely urgent cases, after\ntrying the Burst Advocate, you can contact the Swift PI by phone (see\nSwift TOO web site for information: http://www.swift.psu.edu/)\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34977.",
"published": "2023-11-10T21:35:20.197225Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-10T21:35:20.197249Z",
"modified": "2023-11-10T21:35:20.210783Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4514,
"topic": "gcn.circular",
"uuid": "05af3f48-a823-42d5-8698-7c59a161b5e7",
"title": "Swift GRB231110.89: 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": "23/11/10 21:36:39 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34978"
},
"title": "GCN CIRCULAR",
"number": "34978",
"subject": "Swift GRB231110.89: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko,\nG.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gress, N.M. Budnev, O.Ershova\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,\nA.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nV. Yurkov, A. Gabovich\n(Blagoveschensk Educational State University)\n\nMASTER-Tunka robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the Swift GRB231110.89 (trigger No 1195733,23h 45m 11.04s , +82d 37m 15.6s, R=0.05) errorbox 47 sec after notice time and 548 sec after trigger time at 2023-11-10 21:28:43 UT, with upper limit up to 18.7 mag. The observations began at zenith distance = 43 deg. The sun altitude is -26.1 deg.\n\nThe galactic latitude b = 20 deg., longitude l = 121 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id#00846\n\nWe obtain a following upper limits.\n\nTmid-T0 | Site |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____|_______|______|________\n\n 579 | MASTER-Tunka | C | 60 | 18.7 |\n 658 | MASTER-Tunka | C | 60 | 18.7 |\n 737 | MASTER-Tunka | C | 60 | 18.7 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34978.",
"published": "2023-11-10T21:36:45.496906Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-10T21:36:45.496925Z",
"modified": "2023-11-10T21:36:45.502428Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4681,
"topic": "gcn.circular",
"uuid": "cd2c6903-3344-4f38-a007-1651556d5248",
"title": "Fermi GRB 231114A: 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": "23/11/14 22:47:08 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/35030"
},
"title": "GCN CIRCULAR",
"number": "35030",
"subject": "Fermi GRB 231114A: 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-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB 231114A ( Fermi GBM team, GCN 35025) errorbox 42669 sec after notice time and 42703 sec after trigger time at 2023-11-14 21:10:23 UT, with upper limit up to 18.1 mag. The observations began at zenith distance = 78 deg. The sun altitude is -36.8 deg.\n\nThe galactic latitude b = 15 deg., longitude l = 269 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id#05614\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 42733 | 2023-11-14 21:10:23 | MASTER-SAAO | (09h 16m 41.59s , -46d 56m 19.7s) | C | 60 | 17.9 |\n 42812 | 2023-11-14 21:11:42 | MASTER-SAAO | (09h 09m 16.66s , -45d 02m 40.0s) | C | 60 | 17.5 |\n 42903 | 2023-11-14 21:13:13 | MASTER-SAAO | (08h 58m 12.72s , -41d 14m 29.6s) | C | 60 | 17.9 |\n 43074 | 2023-11-14 21:16:04 | MASTER-SAAO | (09h 35m 43.50s , -48d 48m 37.4s) | C | 60 | 17.6 |\n 43520 | 2023-11-14 21:23:30 | MASTER-SAAO | (09h 13m 12.69s , -43d 08m 45.8s) | C | 60 | 17.7 |\n 43770 | 2023-11-14 21:27:40 | MASTER-SAAO | (09h 16m 41.55s , -46d 57m 23.9s) | C | 60 | 18.0 |\n 43940 | 2023-11-14 21:30:30 | MASTER-SAAO | (09h 20m 03.32s , -45d 01m 26.2s) | C | 60 | 17.8 |\n 44020 | 2023-11-14 21:31:50 | MASTER-SAAO | (08h 58m 13.04s , -41d 16m 17.4s) | C | 60 | 18.0 |\n 44279 | 2023-11-14 21:36:09 | MASTER-SAAO | (09h 35m 43.43s , -48d 48m 45.8s) | C | 60 | 17.6 |\n 44452 | 2023-11-14 21:39:01 | MASTER-SAAO | (09h 03m 44.32s , -43d 10m 07.9s) | C | 60 | 17.9 |\n 44531 | 2023-11-14 21:40:21 | MASTER-SAAO | (09h 13m 19.52s , -43d 09m 18.6s) | C | 60 | 17.8 |\n 44622 | 2023-11-14 21:41:52 | MASTER-SAAO | (09h 23m 46.90s , -43d 07m 57.2s) | C | 60 | 17.5 |\n 44781 | 2023-11-14 21:44:31 | MASTER-SAAO | (09h 16m 46.70s , -46d 55m 44.6s) | C | 60 | 18.1 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35030.",
"published": "2023-11-14T22:47:18.950316Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-14T22:47:18.950336Z",
"modified": "2023-11-14T22:47:18.959403Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4521,
"topic": "gcn.circular",
"uuid": "f30131c2-9959-49ff-823f-5725aa07f5b3",
"title": "GRB231110A: WFST Observation and upper limits",
"submitter": "Hop gcn.circular",
"authors": "Tianrui Sun at Purple Mountain Obs,CAS <trsun@pmo.ac.cn>",
"data": {
"date": "23/11/11 14:16:02 GMT",
"from": "Tianrui Sun at Purple Mountain Obs,CAS <trsun@pmo.ac.cn>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34979"
},
"title": "GCN CIRCULAR",
"number": "34979",
"subject": "GRB231110A: WFST Observation and upper limits"
},
"message_text": "Tian-Rui Sun, Jin-Jun Geng, and Zhen-Qiang Li report on behalf of the WFST Collaboration:\n\nFollowing the detection of GRB 231110A by SWIFT (DâElia et al., GCN 34977) and MASTER (Lipunov et al., GCN 34978), we carried out image observations using the newly deployed Wide Field Survey Telescope (WFST Collaboration; arXiv:2306.07590) at Lenghu Astronomical Observation Base (Qinghai province, China) to search and follow up its afterglow in the BAT error box.\n\nWe observed the target position with 13x60s and 27x90s exposure in i-band starting from 10 Nov 2023, UTC 05:59:01, about 39.45 minutes after the burst.\n\nAfter stacking the individual exposures (5x90s) to enhance observation depth at low altitude, we found two possible candidates:\n\nRA | DEC | i-magnitude |magerr |limit \n23:45:02.3407 | +82:38:43.067 | 21.6953 |0.0957 |22.3909\n23:45:18.0531 | +82:37:18.403 | 22.0166 |0.1286 |22.3909\n\nWe used the PanStarrs DR1 (Flewelling,2020) catalog as the magnitude reference for calibration.\n\n\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34979.",
"published": "2023-11-11T14:16:13.448954Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-11T14:16:13.448974Z",
"modified": "2023-11-11T14:16:13.457165Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4522,
"topic": "gcn.circular",
"uuid": "9c5937ec-da87-412e-9b08-80e2ea596044",
"title": "Swift GRB231111.60: 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": "23/11/11 14:29:23 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34980"
},
"title": "GCN CIRCULAR",
"number": "34980",
"subject": "Swift GRB231111.60: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko,\nG.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gress, N.M. Budnev, O.Ershova\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,\nA.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nV. Yurkov, A. Gabovich\n(Blagoveschensk Educational State University)\n\nMASTER-Tunka robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the Swift GRB231111.60 (trigger No 1195887,19h 20m 56.16s , +52d 26m 49.2s, R=0.05) errorbox 17 sec after notice time and 37 sec after trigger time at 2023-11-11 14:17:57 UT, with upper limit up to 19.4 mag. The observations began at zenith distance = 45 deg. The sun altitude is -44.8 deg.\n\nThe galactic latitude b = 17 deg., longitude l = 84 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id#01436\n\nWe obtain a following upper limits.\n\nTmid-T0 | Site |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____|_______|______|________\n\n 39 | MASTER-Tunka | C | 1 | 13.9 |\n 39 | MASTER-Tunka | C | 1 | 16.9 |\n 67 | MASTER-Tunka | C | 10 | 17.6 |\n 68 | MASTER-Tunka | C | 10 | 19.0 |\n 96 | MASTER-Tunka | C | 10 | 17.6 |\n 97 | MASTER-Tunka | C | 10 | 19.1 |\n 131 | MASTER-Tunka | C | 20 | 18.1 |\n 131 | MASTER-Tunka | C | 20 | 19.4 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34980.",
"published": "2023-11-11T14:29:33.419704Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-11T14:29:33.419763Z",
"modified": "2023-11-11T14:29:33.433264Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4523,
"topic": "gcn.circular",
"uuid": "ce04e0ed-fea3-4708-9136-6b02cddd8548",
"title": "GRB 231111A: Swift detection of a burst with an optical counterpart",
"submitter": "Hop gcn.circular",
"authors": "Jamie Kennea at Penn State <jak51@psu.edu>",
"data": {
"date": "23/11/11 14:33:33 GMT",
"from": "Jamie Kennea at Penn State <jak51@psu.edu>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34981"
},
"title": "GCN CIRCULAR",
"number": "34981",
"subject": "GRB 231111A: Swift detection of a burst with an optical counterpart"
},
"message_text": "\nA. Melandri (INAF-OAR), E. Ambrosi (INAF-IASFPA),\nA. D'Ai (INAF-IASFPA), S. Dichiara (PSU), J.D. Gropp (PSU),\nJ. A. Kennea (PSU) and D. M. Palmer (LANL) report on behalf of the\nNeil Gehrels Swift Observatory Team:\n\nAt 14:17:19 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 231111A (trigger\u001195887). Swift slewed immediately to\nthe event. The BAT on-board calculated location is\nRA, Dec 290.234, +52.447 which is\n RA(J2000) = 19h 20m 56s\n Dec(J2000) = +52d 26' 49\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including\nsystematic uncertainty). Due to a telemetry outage, there is no\nimmediately available BAT lightcurve information. However the\ntrigger information indicates an initial count rate of\n3100 counts/s (25-100 keV) on a 1 second timescale.\n\nThe XRT began observing the field at 14:18:59.3 UT, 99.6 seconds after\nthe BAT trigger. XRT found a bright, uncatalogued X-ray source located\nat RA, Dec 290.1915, 52.4383 which is equivalent to:\n RA(J2000) = 19h 20m 45.96s\n Dec(J2000) = +52d 26' 17.9\"\nwith an uncertainty of 5.5 arcseconds (radius, 90% containment). This\nlocation is 98 arcseconds from the BAT onboard position, within the BAT\nerror circle. No event data are yet available to determine the column\ndensity using X-ray spectroscopy.\n\nUVOT took a finding chart exposure of 238 seconds with the U filter starting\n164 seconds after the BAT trigger. There is a candidate afterglow in the\nrapidly available 2.7'x2.7' sub-image at\n RA(J2000) =\t19:20:45.24 = 290.18848\n DEC(J2000) = +52:26:10.5 = 52.43626\nwith a 90%-confidence error radius of about 0.62 arc sec. This position is 9.9\narc sec. from the center of the XRT error circle. The estimated magnitude is\n16.51 with a 1-sigma error of about 0.14. No correction has been made for the\nexpected extinction corresponding to E(B-V) of 0.117.\n\nBurst Advocate for this burst is A. Melandri (andrea.melandri AT inaf.it).\nPlease contact the BA by email if you require additional information\nregarding Swift followup of this burst. In extremely urgent cases, after\ntrying the Burst Advocate, you can contact the Swift PI by phone (see\nSwift TOO web site for information: http://www.swift.psu.edu/)\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34981.",
"published": "2023-11-11T14:33:41.112289Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-11T14:33:41.112310Z",
"modified": "2023-11-11T14:33:41.118209Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4528,
"topic": "gcn.circular",
"uuid": "39467b8f-b76d-4e0d-9857-fb853a9e03dc",
"title": "GRB 231111A: Nanshan/HMT optical observations",
"submitter": "Hop gcn.circular",
"authors": "Dong Xu at NAOC/CAS <dxu@nao.cas.cn>",
"data": {
"date": "23/11/11 16:34:46 GMT",
"from": "Dong Xu at NAOC/CAS <dxu@nao.cas.cn>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34982"
},
"title": "GCN CIRCULAR",
"number": "34982",
"subject": "GRB 231111A: Nanshan/HMT optical observations"
},
"message_text": "S.Q. Jiang, Z.P. Zhu, S.Y. Fu, J. An, X. Liu, T.H. Lu, D. Xu (NAOC), X. Gao (Urumqi No.1 Senior High School), J.Z. Liu (XAO) report:\n\nWe observed the optical afterglow of GRB 231111A detected by Swift (Melandri et al., GCN 34981) using the HMT-0.5m telescope located at Nanshan, Xinjiang, China. Observations started at 14:18:35 UT on 2023-11-11, i.e., 75 s after the Swift/BAT trigger, and we obtained a serise of 3x20, 3x40, 4x60, 4x90, 4x120, 4x200 s frames without any filter.\n\nThe optical afterglow has been decaying during our observations from m(r)~16.04 mag @85 s post-burst to m(r)~18.77 mag @2734 s post-burst, roughly in a powerlaw with a decay index of ~ -0.7, calibrated with the nearby PanSTAR field in the Sloan r-filter and the magnitude is not corrected for Galactic extinction.\n\n\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34982.",
"published": "2023-11-11T16:35:02.671142Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-11T16:35:02.671182Z",
"modified": "2023-11-11T16:35:02.678097Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4529,
"topic": "gcn.circular",
"uuid": "e17b19d8-8abe-4532-9c9b-9de0d3c5c36f",
"title": "GRB 231111A: MASTER OT earlier detection",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "23/11/11 16:40:06 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34983"
},
"title": "GCN CIRCULAR",
"number": "34983",
"subject": "GRB 231111A: MASTER OT earlier detection"
},
"message_text": "V. Lipunov, P.Balanutsa (Lomonosov MSU), N.Budnev, O.Gress (ISU, API),A.Sankovich,\nD.Vlasenko, Yu.Tselik, Ya.Kechin, E.Gorbovskoy, A.Kuznetsov, K.Zhirkov, N.Tiurina,\nA.Chasovnikov, I.Gorbunov, D.Zimnukhov, V.Senik, V.Topolev, D.Cheryasov, A.Sosnovskij, V.Senik (Lomonosov Moscow State University, SAI, Physics Department),\nR. Rebolo, M. Serra(The Instituto de Astrofisica de Canarias),\nD. Buckley (South African Astronomical Observatory),\nR. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico FelixAguilar OAFA),\nA. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),\nA. Gabovich, V.Yurkov (Blagoveschensk Educational State University)\n\nMASTER Global robotic net (http://observ.pereplet.ru Lipunov et al.,2010,Advances in Astronomy,2010,30L)\nstarted (Lipunov et al. GCN 34980)\nSwift GRB 231111A (Ttrigger\u0014:17:19UT, Melandri al. GCN 34981, XRTstarts after trigger time)\n17s after notice time at 14:17:57UT.\n\nWe detected optical counterpart (Melandri et al. GCN 34981) of GRB 231111A\nMASTER OT J192045.23+522610.1 from first image at rise stage.\nWe see Smooth Optical Self-similar Emission of this Gamma-Ray Bursts\n(SOSS-emission, Lipunov et al. 2017, ApJ, 845, id9 https://ui.adsabs.harvard.edu/abs/2017ApJ...845...52L/abstract )\n\nObservations and reduction will be continued.\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34983.",
"published": "2023-11-11T16:40:14.446452Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-11T16:40:14.446508Z",
"modified": "2023-11-11T16:40:14.452705Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4532,
"topic": "gcn.circular",
"uuid": "2a84873b-1d89-49c5-951c-089319d5ff35",
"title": "GRB231111A: GIT confirmation of the optical afterglow",
"submitter": "Hop gcn.circular",
"authors": "Anirudh Salgundi <salgundi.anirudh@gmail.com>",
"data": {
"date": "23/11/11 17:31:04 GMT",
"from": "Anirudh Salgundi <salgundi.anirudh@gmail.com>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34984"
},
"title": "GCN CIRCULAR",
"number": "34984",
"subject": "GRB231111A: GIT confirmation of the optical afterglow"
},
"message_text": "R. Kumar, A. Salgundi, V. Swain, V. Bhalerao (IIT Bombay), S. Barway, G. C. Anupama (IIA), K. Angail (IAO)\n\nWe observed the field of GRB 231111A detected by Swift (Melandri et al., GCN 34981) with 0.7m GROWTH-India Telescope (GIT). We started the observation at 14:30:41 UT on 2023-11-11, i.e., 14.46 minutes after the Swift trigger. We obtained multiple frames in the g' and r' bands, and have a clear detection at the position reported by Swift/XRT (Melandri et al., GCN 34981). The details of the photometry are given in the below table:\n\n----------------------------------------------------------------------\n\nJD (mid) | t-t0 (minutes) | Filter | Exposure (s) | Magnitude (AB) |\n\n----------------------------------------------------------------------\n\n\n2460260.105395619 | 14.46 | r' | 200 | 17.88 +/- 0.05 |\n2460260.108019142 | 18.23 | g' | 200 | 18.35 +/- 0.04 |\n2460260.110584214 | 21.92 | r' | 200 | 18.24 +/- 0.04 |\n2460260.113222184 | 25.72 | g' | 200 | 18.64 +/- 0.04 |\n2460260.204636255 | 157.36 | r' | 300 | 19.52 +/- 0.07 |\n2460260.208421405 | 162.81 | g' | 300 | 19.99 +/- 0.07 |\n\n----------------------------------------------------------------------\n\nBased on our photometry, we find that the source is consistently fading with power-law decay rate of 0.69 +/- 0.04 in both g' and r' band. Our results are consistent with magnitudes and decay rate obtained by Nanshan/HMT (Jiang et al. GCN 34982). The magnitudes are calibrated against PanSTARRS DR1 (Chambers et al., 2016) and not corrected for Galactic extinction.\n\nThe GROWTH India Telescope (GIT; Kumar et al. 2022) is a 70-cm telescope with a 0.7-degree field of view, set up by the Indian Institute of Astrophysics (IIA) and the Indian Institute of Technology Bombay (IITB) with funding from DST-SERB and IUSSTF. It is located at the Indian Astronomical Observatory (Hanle), operated by IIA. We acknowledge funding by the IITB alumni batch of 1994, which partially supports the operations of the telescope. Telescope technical details are available at https://sites.google.com/view/growthindia/.\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34984.",
"published": "2023-11-11T17:31:14.764497Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-11T17:31:14.764518Z",
"modified": "2023-11-11T17:31:14.770292Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4533,
"topic": "gcn.circular",
"uuid": "a8963cb2-9f96-4ab2-8b7e-a6f0cdc0adae",
"title": "GRB231110A: YAHPT Observations",
"submitter": "Hop gcn.circular",
"authors": "Tianrui Sun at Purple Mountain Obs,CAS <trsun@pmo.ac.cn>",
"data": {
"date": "23/11/11 18:04:47 GMT",
"from": "Tianrui Sun at Purple Mountain Obs,CAS <trsun@pmo.ac.cn>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34985"
},
"title": "GCN CIRCULAR",
"number": "34985",
"subject": "GRB231110A: YAHPT Observations"
},
"message_text": "Tian-Rui Sun, Jin-Jun Geng, Jian Chen and Lei Hu report on behalf of the YAHPT team:\n\n\nFollowing the detection of GRB 231111A by SWIFT (Melandri et al., GCN 34981), MASTER (Lipunov et al., GCN 34980, GCN 34983) and Nanshan/HMT (Jiang et al. GCN 34982), we conducted observations using the Yaoan High Precision Telescope at Yaoan Astronomy Observation Station (YAHPT; Yunnan province, China) to search and follow up its afterglow around the SWIFT/UVOT detection.\n\n\nOur follow-up imaging obervations adopted 180s exposure in Rc-band starting from 11 Nov 2023, UTC 14:47:12.70, about 1792.99 seconds after the burst.\nThe YAHPT observations detected a declining optical afterglow from 18.34 +/- 0.07 mag to 18.98 +/- 0.12 mag in Rc band throughout our observations.\nWe monitored this object until it is technically unobservable for our telescope, at about 4755 second after the burst.\n\n\nWe used the USNO B1.0 catalog (R1mag) as the magnitude reference for calibration.\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34985.",
"published": "2023-11-11T18:04:58.516199Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-11T18:04:58.516236Z",
"modified": "2023-11-11T18:04:58.523918Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6355,
"topic": "gcn.circular",
"uuid": "b40a8ba4-b26e-4d87-b801-d7e6d8ad1467",
"title": "Swift satellite resumes pointed science observations",
"submitter": "Hop gcn.circular",
"authors": "Brad Cenko at NASA/GSFC <brad.cenko@nasa.gov>",
"data": {
"date": "24/04/05 00:58:32 GMT",
"from": "Brad Cenko at NASA/GSFC <brad.cenko@nasa.gov>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36033"
},
"title": "GCN CIRCULAR",
"number": "36033",
"subject": "Swift satellite resumes pointed science observations"
},
"message_text": "Following the successful installation and testing of a flight software update to enable operation with two gyroscopes (GCN 35953), Swift has now resumed pointed science observations. Preliminary analysis indicates that spacecraft attitude control is as good, if not better, than prior to the onset of increased noise in gyroscope #1 in August 2023 (GCN 34633).\n\nXRT data collection resumed on 3 April 2024, while UVOT was re-enabled on 4 April 2024.\n\nWe anticipate that the rate of spurious BAT triggers resulting from the misidentification of known sources due to star tracker loss of lock should be dramatically reduced. Longer term, we plan to cease the public release of these spurious triggers. But in the interim we recommend careful filtering based on the comment fields of these notices on the user end.\n\nSimilarly, we anticipate that the trailed point spread functions seen in some UVOT images during the last 6 months should be largely mitigated. The team is developing software updates to correct affected event mode data taken during this period, and will update the community when this is ready for release.\n\nThe Swift team will continue to carefully monitor data from all instruments in the coming weeks, and we urge users to do the same as we gain experience with the new spacecraft performance.\n\nIf you have further questions, please feel free to reach out to the Swift PI, Brad Cenko, at brad.cenko@nasa.gov\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36033.",
"published": "2024-04-05T00:58:48.498769Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-05T00:58:48.498782Z",
"modified": "2024-04-05T00:58:48.505737Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6356,
"topic": "gcn.circular",
"uuid": "70d9ed87-6bad-4b3a-a5c8-609e7a602d95",
"title": "LXT 240402A/GRB 240402B: GECAM-C refined analysis",
"submitter": "Hop gcn.circular",
"authors": "Chenwei Wang at IHEP <cwwang@ihep.ac.cn>",
"data": {
"date": "24/04/05 01:59:44 GMT",
"from": "Chenwei Wang at IHEP <cwwang@ihep.ac.cn>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36034"
},
"title": "GCN CIRCULAR",
"number": "36034",
"subject": "LXT 240402A/GRB 240402B: GECAM-C refined analysis"
},
"message_text": "Wangchen Xue, Shaolin Xiong, Chenwei Wang, Chengkui Li, Shuxu Yi on behalf of GECAM team\n\nFollowing our initial analysis reported in GCN 36017, here we analyzed the Amati relation for this burst.\nWe find that, if this burst had a redshift of z~0.047 (Levan et al.; GCN 36025, Xu et al., GCN 36016),\nit falls in the short burst region, supporting the compact object merger origin as also evident by the large offset from the galaxy (Levan et al., GCN 36025).\n\nThe small spectral lag compared to its luminosity also indicates the compact object merger origin.\n\nThe associated gravitational wave would likely have been observed if LVK was observing at the time of this burst.\nThe gravitational wave of such kind of GRB with small redshift would be potentially observed in O4b of LVK.\n\nWith the probable compact object merger origin of this GRB, follow-up observations are encouraged.\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36034.",
"published": "2024-04-05T02:00:00.290922Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-05T02:00:00.290942Z",
"modified": "2024-04-05T02:00:00.313261Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4547,
"topic": "gcn.circular",
"uuid": "ff061181-456f-4457-9758-a4312a89962d",
"title": "GRB 231110A: GECAM detection",
"submitter": "Hop gcn.circular",
"authors": "Yue Wang <m18509381757@163.com>",
"data": {
"date": "23/11/12 01:01:31 GMT",
"from": "Yue Wang <m18509381757@163.com>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34989"
},
"title": "GCN CIRCULAR",
"number": "34989",
"subject": "GRB 231110A: GECAM detection"
},
"message_text": "Yue Wang, Shaoli Xiong, Yue Huang report on behalf of the GECAM team:\n\nGECAM-B was triggered in-flight by a long burst, GRB 231110A, at 2023-11-10T21:19:35.100 UTC (T0), which was also observed by Swift/BAT (GCN # 34977).\n\nAccording to the realtime alert data of GECAM-B, this burst\nmainly consists of a long pulse with a duration (T90) of about ~20 sec (20-1000 keV).\n\nThe GECAM-B localization is consistent with the Swift/BAT team localization (trigger\u001195733) within the error.\n\nThe time-averaged spectrum of GECAM-B realtime data shows that it could be\nadequately fit by a cut-off power-law with a flux about 1.3E-6 erg/cm^2 in 20-1000 keV.\n\nWe note that these results are based on realtime alert data and thus very preliminary.\nRefined analysis will be reported later.\n\nGravitational wave high-energy Electromagnetic Counterpart All-sky Monitor\n(GECAM) mission originally consists of two microsatellites (GECAM-A and GECAM-B)\nlaunched in Dec. 2020. As the third member of GECAM constellation,\nGECAM-C was launched onboard SATech-01 experimental satellite in July 2022.\nGECAM mission is funded by the Chinese Academy of Sciences (CAS).\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34989.",
"published": "2023-11-12T01:01:41.654331Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-12T01:01:41.654366Z",
"modified": "2023-11-12T01:01:41.662493Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4548,
"topic": "gcn.circular",
"uuid": "557798bd-64fa-4495-93bd-514569691e02",
"title": "GRB 231111A: GECAM-C detection of a long burst",
"submitter": "Hop gcn.circular",
"authors": "wenlongzhang2018@163.com",
"data": {
"date": "23/11/12 01:02:21 GMT",
"from": "wenlongzhang2018@163.com",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34990"
},
"title": "GCN CIRCULAR",
"number": "34990",
"subject": "GRB 231111A: GECAM-C detection of a long burst"
},
"message_text": "Wen-long Zhang, Shaoli Xiong, Yue Huang report on behalf of the GECAM team:\n\nGECAM-C was triggered by a long burst, GRB 231111A, at 2023-11-11T14:17:19.850 UTC (T0), which was also observed by Swift/BATÂ ( GCN 34981) . \n\nAccording to the realtime alert data, the GECAM-C light curve shows roughly two peaks with a total duration of ~30 sec (20-1000 keV). \nThe time-averaged spectrum could be adequately fit by a Band function with a flux about 3.36E-7 erg/cm2 in 20-1000 keV. \n\nWe note that these results are based on realtime alert data and thus very preliminary. Refined analysis will be reported later.\n\nGravitational wave high-energy Electromagnetic Counterpart All-sky Monitor(GECAM) mission originally consists of two microsatellites (GECAM-A and GECAM-B) launched in Dec. 2020. As the third member of GECAM constellation, GECAM-C was launched onboard SATech-01 experimental satellite in July 2022. GECAM mission is funded by the Chinese Academy of Sciences (CAS).\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34990.",
"published": "2023-11-12T01:02:27.764245Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-12T01:02:27.764264Z",
"modified": "2023-11-12T01:02:27.769837Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4542,
"topic": "gcn.circular",
"uuid": "76e4a21a-2162-417d-aece-7492d124a6c3",
"title": "GRB 231110A: Swift-XRT afterglow detection",
"submitter": "Hop gcn.circular",
"authors": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"data": {
"date": "23/11/11 20:48:23 GMT",
"from": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34986"
},
"title": "GCN CIRCULAR",
"number": "34986",
"subject": "GRB 231110A: Swift-XRT afterglow detection"
},
"message_text": "A.P. Beardmore (U. Leicester), J.P. Osborne (U. Leicester), M. Perri\n(SSDC & INAF-OAR), V. D'Elia (SSDC & INAF-OAR), B. Sbarufatti\n(INAF-OAB), A. Tohuvavohu (U. Toronto), D.N. Burrows (PSU), J. D. Gropp\n(PSU) and P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT\nteam:\n\nSwift-XRT has performed follow-up observations of the\nSwift-BAT-detected burst GRB 231110A, collecting 10 ks of Photon\nCounting (PC) mode data between T0+8.9 ks and T0+61.1 ks.\n\nFour uncatalogued X-ray sources are detected consistent with being\nwithin 296 arcsec of the Swift-BAT position, of which one (\"Source 2\")\nis believed to be the afterglow. The position of this source is RA,\nDec56.2752, +82.6447 which is equivalent to:\n\nRA (J2000): 23:45:6.05\nDec(J2000): +82:38:40.9\n\nwith an uncertainty of 5.1 arcsec (radius, 90% confidence). This\nposition is 85 arcsec from the Swift-BAT position. There is evidence\nthat the source may be fading, however we cannot constrain the decay at\nthe current time\n\nThe results of the XRT-team automatic analysis are available at\nhttp://www.swift.ac.uk/xrt_products/01195733.\nThe results of the full analysis of the XRT observations are available\nat https://www.swift.ac.uk/ToO_GRBs/01195733.\n\nThis circular is an official product of the Swift-XRT team.\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34986.",
"published": "2023-11-11T20:48:32.680255Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-11T20:48:32.680273Z",
"modified": "2023-11-11T20:48:32.685685Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4543,
"topic": "gcn.circular",
"uuid": "54254246-fc0b-4f99-b59a-e7709fe88ac8",
"title": "GRB 231110A: SAO RAS optical observations",
"submitter": "Hop gcn.circular",
"authors": "Moskvitin Alexander at SAO RAS <mosk@sao.ru>",
"data": {
"date": "23/11/11 21:59:36 GMT",
"from": "Moskvitin Alexander at SAO RAS <mosk@sao.ru>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34987"
},
"title": "GCN CIRCULAR",
"number": "34987",
"subject": "GRB 231110A: SAO RAS optical observations"
},
"message_text": "A. S. Moskvitin and O. A. Maslennikova (SAO RAS)\nreport on behalf of the GRB follow-up team.\n\nWe observed the field of Swift GRB 231110A (D'Elia et al., GCN #34977)\nwith the 1-m telescope of SAO RAS equipped with the CCD photometer.\nWe obtained 8 x 300 sec. images in Rc band on November 10,\n22:09:05--22:55:32 UT (t_mid - T0 = 1.21224 hours).\n\nFollowing the non-detection of OT by MASTER team (Lipunov et al.,\nGCN #34978) we also did not detect any significant source within\nthe probable XRT error circle (Beardmore et al., GCN #34986)\ndown to the limiting magnitude R_lim = 22.9. We should note\nthe presence of the first object mentioned by Sun et al. (GCN #34979)\nnear the XRT error circle. The brightness of this object is\nR = 22.50 +/- 0.24.\n\nPreliminary photometry is based on nearby USNO-B1 stars (R2 mag).\nMagnitudes are not corrected for MW extinction.\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34987.",
"published": "2023-11-11T21:59:45.879189Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-11T21:59:45.879216Z",
"modified": "2023-11-11T21:59:45.884795Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4549,
"topic": "gcn.circular",
"uuid": "7041e9b4-1330-4036-89cd-4d8a2a3a6028",
"title": "GRB 231111A: Enhanced Swift-XRT position",
"submitter": "Hop gcn.circular",
"authors": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"data": {
"date": "23/11/12 01:50:29 GMT",
"from": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34991"
},
"title": "GCN CIRCULAR",
"number": "34991",
"subject": "GRB 231111A: Enhanced Swift-XRT position"
},
"message_text": "J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester)\nreport on behalf of the Swift-XRT team.\n\nUsing 2772 s of XRT Photon Counting mode data and 5 UVOT\nimages for GRB 231111A, we find an astrometrically corrected X-ray\nposition (using the XRT-UVOT alignment and matching UVOT field sources\nto the USNO-B1 catalogue): RA, Dec = 290.18884, +52.43571 which is equivalent\nto:\n\nRA (J2000): 19h 20m 45.32s\nDec (J2000): +52d 26' 08.6\"\n\nwith an uncertainty of 2.3 arcsec (radius, 90% confidence).\n\nThis position may be improved as more data are received. The latest\nposition can be viewed at http://www.swift.ac.uk/xrt_positions. Position\nenhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans\net al. (2009, MNRAS, 397, 1177).\n\nThis circular was automatically generated, and is an official product of the\nSwift-XRT team.\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34991.",
"published": "2023-11-12T01:50:39.859214Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-12T01:50:39.859233Z",
"modified": "2023-11-12T01:50:39.865581Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4550,
"topic": "gcn.circular",
"uuid": "1ef4c51b-428e-46c9-b6e6-879e0ba75e24",
"title": "GRB 231110A: GECAM-B detection (correction)",
"submitter": "Hop gcn.circular",
"authors": "Yue Wang <m18509381757@163.com>",
"data": {
"date": "23/11/12 02:26:47 GMT",
"from": "Yue Wang <m18509381757@163.com>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34992"
},
"title": "GCN CIRCULAR",
"number": "34992",
"subject": "GRB 231110A: GECAM-B detection (correction)"
},
"message_text": "Yue Wang, Shao-Lin Xiong, Yue Huang report on behalf of the GECAM team:\n\nGECAM-B was triggered in-flight by a long burst, GRB 231110A, at 2023-11-10T21:19:35.100 UTC (T0), which was also observed by Swift/BAT (GCN #34977).\n\nAccording to the realtime alert data of GECAM-B, this burst\nmainly consists of a long pulse with a duration (T90) of about ~20 sec (20-1000 keV).\n\nThe GECAM-B localization is consistent with the Swift/BAT localization (trigger\u001195733) within the error.\n\nThe time-averaged spectrum of GECAM-B realtime data from about T0 to T0+4 s could be\nadequately fit by a cut-off power-law with a flux about 1.3E-6 erg/cm^2/s in 20-1000 keV.\n\nWe note that these results are based on realtime alert data and thus very preliminary.\nRefined analysis will be reported later.\n\nGravitational wave high-energy Electromagnetic Counterpart All-sky Monitor\n(GECAM) mission originally consists of two microsatellites (GECAM-A and GECAM-B)\nlaunched in Dec. 2020. As the third member of GECAM constellation,\nGECAM-C was launched onboard SATech-01 experimental satellite in July 2022.\nGECAM mission is funded by the Chinese Academy of Sciences (CAS).\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34992.",
"published": "2023-11-12T02:26:57.837115Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-12T02:26:57.837134Z",
"modified": "2023-11-12T02:26:57.842544Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4544,
"topic": "gcn.circular",
"uuid": "9b51b61c-3919-4708-8140-c12ce31a0118",
"title": "GRB 231110A: GOTO optical upper limits",
"submitter": "Hop gcn.circular",
"authors": "Ben Gompertz at U of Birmingham <b.gompertz@bham.ac.uk>",
"data": {
"date": "23/11/11 22:37:18 GMT",
"from": "Ben Gompertz at U of Birmingham <b.gompertz@bham.ac.uk>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34988"
},
"title": "GCN CIRCULAR",
"number": "34988",
"subject": "GRB 231110A: GOTO optical upper limits"
},
"message_text": "B. P. Gompertz, R. Starling, A. Kumar, K. Ackley, M. J. Dyer, J. Lyman, K. Ulaczyk, F. Jimenez-Ibarra, D. O'Neill, D. Steeghs, D. K. Galloway, V. Dhillon, P. O'Brien, G. Ramsay, K. Noysena, R. Kotak, R. P. Breton, L. K. Nuttall, E. Pall'e and D. Pollacco report on behalf of the GOTO collaboration:\n\nThe Gravitational-wave Optical Transient Observer (GOTO, Steeghs et al. 2022) performed a targeted observation in response to GRB 231110A (DâElia et al., GCN 34977) at 22:26:08 UT on 2023-11-10, 66.5 minutes after trigger. The observation consisted of a 4x90s exposure in the GOTO L-band (400-700 nm).\n\nImages were processed immediately after acquisition using the GOTO pipeline. No optical counterpart is detected at the position of the X-ray afterglow (Beardmore et al., GCN 34986) to a 3-sigma limit of L > 19.9 magnitudes (AB).\n\nMagnitudes were calibrated using ATLAS-REFCAT2 (Tonry et al. 2018) and are not corrected for Galactic extinction.\n\nGOTO (https://goto-observatory.org) is a network of telescopes that is principally funded by the STFC and operated at the Roque de los Muchachos Observatory on La Palma, Spain, and Siding Spring Observatory in NSW, Australia, on behalf of a consortium including the University of Warwick, Monash University, Armagh Observatory & Planetarium, the University of Leicester, the University of Sheffield, the National Astronomical Research Institute of Thailand (NARIT), the University of Turku, the University of Portsmouth, the University of Manchester and the Instituto de Astrofisica de Canarias (IAC).\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34988.",
"published": "2023-11-11T22:37:29.627538Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-11T22:37:29.627558Z",
"modified": "2023-11-11T22:37:29.633234Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4551,
"topic": "gcn.circular",
"uuid": "d46b7831-06f6-4837-b305-e6e1ce9fe590",
"title": "GRB 231111A: GECAM-C detection of a long burst (correction)",
"submitter": "Hop gcn.circular",
"authors": "wenlongzhang2018@163.com",
"data": {
"date": "23/11/12 02:28:22 GMT",
"from": "wenlongzhang2018@163.com",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34993"
},
"title": "GCN CIRCULAR",
"number": "34993",
"subject": "GRB 231111A: GECAM-C detection of a long burst (correction)"
},
"message_text": "Wen-Long Zhang, Shao-Lin Xiong, Yue Huang report on behalf of the GECAM team:\n\nGECAM-C was triggered by a long burst, GRB 231111A, at 2023-11-11T14:17:19.850 UTC (T0), which was also observed by Swift/BAT (GCN #34981) .\n\nAccording to the realtime alert data, the GECAM-C light curve shows roughly two peaks with a total duration of ~30 sec (20-1000 keV).\n\nThe time-averaged spectrum of GECAM-C realtime data from about T0 to T0+20 s could be adequately fit by a cut-off power-law with a flux about 3.3E-7 erg/cm^2/s in 20-1000 keV.\n\nWe note that these results are based on realtime alert data and thus very preliminary. Refined analysis will be reported later.\n\nGravitational wave high-energy Electromagnetic Counterpart All-sky Monitor(GECAM) mission originally consists of two microsatellites (GECAM-A and GECAM-B) launched in Dec. 2020. As the third member of GECAM constellation, GECAM-C was launched onboard SATech-01 experimental satellite in July 2022. GECAM mission is funded by the Chinese Academy of Sciences (CAS).\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34993.",
"published": "2023-11-12T02:28:29.012136Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-12T02:28:29.012159Z",
"modified": "2023-11-12T02:28:29.018306Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4552,
"topic": "gcn.circular",
"uuid": "a4a850fb-5214-4825-bcf6-344f57b36d48",
"title": "GRB 231111A: Mondy optical observations",
"submitter": "Hop gcn.circular",
"authors": "Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>",
"data": {
"date": "23/11/12 03:05:47 GMT",
"from": "Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34994"
},
"title": "GCN CIRCULAR",
"number": "34994",
"subject": "GRB 231111A: Mondy optical observations"
},
"message_text": "N. Pankov (HSE, IKI), E. Klunko (ISTP), A. Pozanenko (IKI), S. Belkin (IKI,HSE) report on behalf of GRB IKI FuN:\n\nWe observed the field of Swift GRB 231111A (Melandri et al. GCN 34981) with AZT-33IK telescope of Mondy observatory in R-filter on\n2023-11-11 starting (UT) 14:36:53. We detect afterglow (Melandri et al. GCN 34981; Jiang et al. GCN 34982; Lipunov et al. GCN 34983) within Enhanced Swift-XRT error circle.\nPreliminary photometry of first images is following\n\nDate UT start t-T0 Exp. Filter OT Err. UL(3sigma)\n (mid, days) (s)\n2023-11-11 14:36:53 0.014284 1x120 R 18.24 0.08 20.3\n\nThe photometry is based on nearby USNO-B1.0 R2 stars.\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34994.",
"published": "2023-11-12T03:05:58.072706Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-12T03:05:58.072726Z",
"modified": "2023-11-12T03:05:58.078220Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4555,
"topic": "gcn.circular",
"uuid": "fe59659f-229c-4392-bbc8-0b94062da165",
"title": "GRB 231111A: Swift-XRT refined Analysis",
"submitter": "Hop gcn.circular",
"authors": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"data": {
"date": "23/11/12 04:47:24 GMT",
"from": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34995"
},
"title": "GCN CIRCULAR",
"number": "34995",
"subject": "GRB 231111A: Swift-XRT refined Analysis"
},
"message_text": "J.P. Osborne (U. Leicester), V. D'Elia (SSDC & INAF-OAR), B. Sbarufatti\n(INAF-OAB), A. D'Ai (INAF-IASFPA), D.N. Burrows (PSU), J. D. Gropp\n(PSU), S. Dichiara (PSU), K.L. Page (U. Leicester) and P.A. Evans\nreport on behalf of the Swift-XRT team:\n\nWe have analysed 7.3 ks of XRT data for GRB 231111A, from 93 s to 39.7\nks after the BAT trigger. The data comprise 296 s in Windowed Timing\n(WT) mode (the first 5 s were taken while Swift was slewing) with the\nremainder in Photon Counting (PC) mode.\n\nThe late-time light curve (from T0+16.2 ks) can be modelled with a\npower-law decay with a decay index of alpha=1.03 (+/-0.23).\n\nA spectrum formed from the WT mode data can be fitted with an absorbed\npower-law with a photon spectral index\tof 2.47 (+0.10, -0.06). The\nbest-fitting absorption column is 1.297 (+0.206, -0.027) x 10^21\ncm^-2, consistent with the Galactic value of 1.3 x 10^21 cm^-2\n(Willingale et al. 2013). The PC mode spectrum has a photon index of\n1.98 (+0.19, -0.18) and a best-fitting absorption column of 1.6 (+0.6,\n-0.3) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV\nflux conversion factor deduced from this spectrum is 3.5 x 10^-11 (4.6\nx 10^-11) erg cm^-2 count^-1.\n\nA summary of the PC-mode spectrum is thus:\nTotal column:\t 1.6 (+0.6, -0.3) x 10^21 cm^-2\nGalactic foreground: 1.3 x 10^21 cm^-2\nExcess significance: <1.6 sigma\nPhoton index:\t 1.98 (+0.19, -0.18)\n\nIf the light curve continues to decay with a power-law decay index of\n1.03, the count rate at T+24 hours will be 0.029 count s^-1,\ncorresponding to an observed (unabsorbed) 0.3-10 keV flux of 10.0 x\n10^-13 (1.3 x 10^-12) erg cm^-2 s^-1.\n\nThe results of the XRT-team automatic analysis are available at\nhttp://www.swift.ac.uk/xrt_products/01195887.\n\nThis circular is an official product of the Swift-XRT team.\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34995.",
"published": "2023-11-12T04:47:35.586005Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-12T04:47:35.586040Z",
"modified": "2023-11-12T04:47:35.592022Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4564,
"topic": "gcn.circular",
"uuid": "2777ffa8-91d0-46b8-b9f9-31f31979e22c",
"title": "GRB 231110A: Terskol Zeiss-2000 optical upper limit",
"submitter": "Hop gcn.circular",
"authors": "Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>",
"data": {
"date": "23/11/12 10:50:05 GMT",
"from": "Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34996"
},
"title": "GCN CIRCULAR",
"number": "34996",
"subject": "GRB 231110A: Terskol Zeiss-2000 optical upper limit"
},
"message_text": "N. Pankov (IKI, HSE), I. Sokolov (INASAN, KIAM), A. Buslaeva (INASAN), A. Pozanenko (IKI), S. Belkin (IKI, HSE) report on behalf of GRB IKI FuN:\n\nWe observed the Swift GRB 231110A (D'Elia et al., GCN #34977) with Zeiss-2000 telescope of Terskol observatory starting on 2023-11-10 (UTC) 23:25:16. We do not detect any object within Source #2 of XRT probable afterglow (Beardmore et al., GCN 34986). This is cosnistent with non-detection in other observations (Lipunov et al., GCN 34978; Sun et al., GCN 34979; Sun et al., GCN 34985; Moskvitin et al., GCN 34987; Gompertz et al., GCN 34988). Preliminary photometry of the field is following.\n\nDate UT start t-T0 Filter Exp. OT Err. UL. Telescope\n (mid, days) (s)\n2023-11-10 23:25:16 0.08729 R 28*120 R n/d n/d 22.4 Zeiss-2000\n\nThe photometry is based on the nearby USNO-B1.0 stars.\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34996.",
"published": "2023-11-12T10:50:16.004443Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-12T10:50:16.004463Z",
"modified": "2023-11-12T10:50:16.013839Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4566,
"topic": "gcn.circular",
"uuid": "1414e31b-444f-4e46-ad0c-0111632586d9",
"title": "GRB 231111A: Osservatorio Astronomico \"Nastro Verde\" optical observations with detection of an optical counterpart",
"submitter": "Hop gcn.circular",
"authors": "Nello Ruocco at Osservatorio Nastro Verde - Sorrento (Naples) - Italy - MPC Code C82 <osservatorionastroverde@gmail.com>",
"data": {
"date": "23/11/12 11:03:17 GMT",
"from": "Nello Ruocco at Osservatorio Nastro Verde - Sorrento (Naples) - Italy - MPC Code C82 <osservatorionastroverde@gmail.com>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34997"
},
"title": "GCN CIRCULAR",
"number": "34997",
"subject": "GRB 231111A: Osservatorio Astronomico \"Nastro Verde\" optical observations with detection of an optical counterpart"
},
"message_text": "Nello Ruocco at Osservatorio Nastro Verde - Sorrento (Naples) - Italy\nin a large collaboration with:\nM.G. Dainotti (National Astronomical Observatory of Japan),\nY. Niino (Tokyo University, Institute of Astronomy),\nK. Kalinowski (Aarhus University, Department of Physics and Astronomy),\nB. De Simone (Universita' degli Studi Di Salerno)\nreport:\nFollowing the Swift trigger no. 1195887 (GCN 34981 A. Melandri et al) from the Swift Burst Alert Telescope (BAT), we pointed at the coordinates RA(J2000)\u0019h 20m 45.96s: Dec(J2000)Rd 26' 17.9\" and started our observations with telescope of Nastro Verde Observatory - Sorrento (Naples), Italy.\nMember of:\nAAVSO - American Association of Variable Star Observers.\nUAI/SSV - Unione Astrofili Italiani/sezione stelle variabili.\nAstroCampania Associazione.\n\nThe observations started at 18:00 UT of 2023/11/11, after about 4 hours after the GRB trigger, with light cloud veils that left large spaces of clear sky, with principal telescope SC 0.35 f/10 with focal reduced + CCD Sbig ST10 XME\nI took 13 unfiltered images of 120 sec and 26 unfiltered images of 60 sec . All images, calibrated with masterdark and masterflat have been measured with Thycho Tracker and Astrometrica software\nWe have detected a faint source at the enhanced position reported by Swift-XRT team (J.P. Osborne et al., GCN 34991 )\nat following position\n\nRA (J2000.0) 19 20 45.12\nDec (J2000.0) +52 26 10.2\n\nwith the following photometry and astrometry:\n\nGRB 23111 KC2023 11 11.82061 19 20 45.12 +52 26 10.2 20.4 C82\n\n\n\n\nMagnitudes were estimated with the GAIA DR2 cat. and are not corrected for galactic dust extinction.\n\nFurther observations are encouraged.\n\nThe message may be cited.\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34997.",
"published": "2023-11-12T11:03:27.006697Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-12T11:03:27.006716Z",
"modified": "2023-11-12T11:03:27.012577Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4568,
"topic": "gcn.circular",
"uuid": "d29d71ca-65de-4b1c-89e6-aad33df5957d",
"title": "GRB 231106B: GRBAlpha detection",
"submitter": "Hop gcn.circular",
"authors": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"data": {
"date": "23/11/12 11:28:33 GMT",
"from": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34998"
},
"title": "GCN CIRCULAR",
"number": "34998",
"subject": "GRB 231106B: GRBAlpha detection"
},
"message_text": "M. Dafcikova, J. Ripa (Masaryk U.), A. Pal (Konkoly Observatory), N. Werner (Masaryk U.), M. Ohno, H. Takahashi (Hiroshima U.), L. Meszaros, B. Csak (Konkoly Observatory), N. Husarikova, F. Munz , M. Topinka, M. Kolar, J.-P. Breuer, F. Hroch (Masaryk U.), T. Urbanec, M. Kasal, A. Povalac (Brno U. of Technology), J. Hudec, J. Kapus, M. Frajt (Spacemanic s.r.o), R. Laszlo, M. Koleda (Needronix s.r.o), M. Smelko, P. Hanak, P. Lipovsky (Technical U. of Kosice), G. Galgoczi (Wigner Research Center/Eotvos U.), Y. Uchida, H. Poon, H. Matake (Hiroshima U.), N. Uchida (ISAS/JAXA), T. Bozoki (Eotvos U.), G. Dalya (Eotvos U.), yyT. Enoto (Kyoto U.), Zs. Frei (Eotvos U.), G. Friss (Eotvos U.), Y. Fukazawa, K. Hirose (Hiroshima U.), S. Hisadomi (Nagoya U.), Y. Ichinohe (Rikkyo U.), K. Kapas (Eotvos U.), L. L. Kiss (Konkoly Observatory), T. Mizuno (Hiroshima U.), K. Nakazawa (Nagoya U.), H. Odaka (Univ of Tokyo), J. Takatsy (Eotvos U.), K. Torigoe (Hiroshima U.), N. Kogiso, M. Yoneyama (Osaka Metropolitan U.), M. Moritaki (U. Tokyo), T. Kano (U. Michigan) -- the GRBAlpha collaboration.\n\nThe short-duration GRB 231106B (Konus/Wind trigger at 2023-11-06 21:19:01.729 UT; INTEGRAL/SPI-ACS peak detection at 2023-11-06 ~21:19:01 UT) was observed by the GRBAlpha 1U CubeSat (Pal et al. 2023, A&A, 677, 40; arXiv:2302.10048).\n\nThe detection was confirmed at the peak time 2023-11-06 21:19:01 UTC. The T90 duration measured by GRBAlpha is 1 s and the overall significance during T90 reaches 6.8 sigma.\n\nThe light curve obtained by GRBAlpha is available here: https://grbalpha.konkoly.hu/static/share/GRB231106B_GCN.pdf\n\nAll GRBAlpha detections are listed at: https://monoceros.physics.muni.cz/hea/GRBAlpha/ \nGRBAlpha, launched on 2021 March 22, is a demonstration mission for a future CubeSat constellation (Werner et al. Proc. SPIE 2018). The detector of GRBAlpha consists of a 75 x 75 x 5 mm3 CsI scintillator read out by a SiPM array, covering the energy range from ~50 keV to ~1000 keV. To increase the duty cycle and the downlink rate, the upgrade of the on-board data acquisition software stack is in progress. The ground segment is also supported by the radio amateur community and it takes advantage of the SatNOGS network for increased data downlink volume. \n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34998.",
"published": "2023-11-12T11:28:44.144682Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-12T11:28:44.144702Z",
"modified": "2023-11-12T11:28:44.151012Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4569,
"topic": "gcn.circular",
"uuid": "cecc020e-5344-40ec-80ba-65de594c5cf2",
"title": "GRB 231111A: GMG observation upper limit",
"submitter": "Hop gcn.circular",
"authors": "Jirong Mao at Yunnan Obs <jirongmao@mail.ynao.ac.cn>",
"data": {
"date": "23/11/12 12:30:52 GMT",
"from": "Jirong Mao at Yunnan Obs <jirongmao@mail.ynao.ac.cn>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/34999"
},
"title": "GCN CIRCULAR",
"number": "34999",
"subject": "GRB 231111A: GMG observation upper limit"
},
"message_text": "B.-T. Wang, R.-Z. Li, J. Mao, X. Ding, J.-M. Bai report:\n\nWe observed the field of GRB 231111A ( Melandri et al. GCN 34981) by the GMG telescope in Yunnan observatories. The observation began from UT 11:29:03 Nov 12, 2023, about 21.2 hours from the trigger. We could not observe the optical afterglow down to a magnitude limit of R~20.7.\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/34999.",
"published": "2023-11-12T12:31:03.148813Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-12T12:31:03.148834Z",
"modified": "2023-11-12T12:31:03.158484Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6363,
"topic": "gcn.circular",
"uuid": "c0016a2d-86aa-4f74-96c9-f931adfaf9bd",
"title": "GRB 240331A: GRBAlpha detection",
"submitter": "Hop gcn.circular",
"authors": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"data": {
"date": "24/04/05 14:27:11 GMT",
"from": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36035"
},
"title": "GCN CIRCULAR",
"number": "36035",
"subject": "GRB 240331A: GRBAlpha detection"
},
"message_text": "M. Dafcikova, J. Ripa, M. Kolar (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. Duriskova, L. Szakszonova, J.-P. Breuer, F. Hroch (Masaryk U.), T. Urbanec, M. Kasal, A. Povalac (Brno U. of Technology), J. Hudec, J. Kapus, M. Frajt (Spacemanic s.r.o), R. Laszlo, M. Koleda (Needronix s.r.o), M. Smelko, P. Hanak, P. Lipovsky (Technical U. of Kosice), G. Galgoczi (Wigner Research Center/Eotvos U.), Y. Uchida, H. Poon, H. Matake (Hiroshima U.), N. Uchida (ISAS/JAXA), T. Bozoki (Eotvos U.), G. Dalya (Eotvos U.), T. Enoto (Kyoto U.), Zs. Frei (Eotvos U.), G. Friss (Eotvos U.), Y. Fukazawa, K. Hirose (Hiroshima U.), S. Hisadomi (Nagoya U.), Y. Ichinohe (Rikkyo U.), K. Kapas (Eotvos U.), L. L. Kiss (Konkoly Observatory), T. Mizuno (Hiroshima U.), K. Nakazawa (Nagoya U.), H. Odaka (Univ of Tokyo), J. Takatsy (Eotvos U.), K. Torigoe (Hiroshima U.), N. Kogiso, M. Yoneyama (Osaka Metropolitan U.), M. Moritaki (U. Tokyo), T. Kano (U. Michigan) -- the GRBAlpha collaboration.\n\nThe long-duration GRB 240331A (Fermi/GBM detection: GCN 35998; AstroSat detection: GCN 36000; INTEGRAL/SPI-ACS peak detection at 2024-03-31 ~23:55:20 UT) was observed by the GRBAlpha 1U CubeSat (Pal et al. 2023, A&A, 677, 40; https://ui.adsabs.harvard.edu/abs/2023A%26A...677A..40P/abstract).\n\nThe detection was confirmed at the peak time 2024-03-31 23:55:19.5 UTC. The T90 duration measured by GRBAlpha is 9.5 s and the overall significance during T90 reaches 6.8 sigma.\n\nThe light curve obtained by GRBAlpha is available here: https://grbalpha.konkoly.hu/static/share/GRB240331A_GCN.pdf\n\nAll GRBAlpha detections are listed at: https://monoceros.physics.muni.cz/hea/GRBAlpha/\nGRBAlpha, launched on 2021 March 22, is a demonstration mission for a future CubeSat constellation (Werner et al. Proc. SPIE 2018). The detector of GRBAlpha consists of a 75 x 75 x 5 mm3 CsI scintillator read out by a SiPM array, covering the energy range from ~50 keV to ~1000 keV. To increase the duty cycle and the downlink rate, the upgrade of the on-board data acquisition software stack is in progress. The ground segment is also supported by the radio amateur community and it takes advantage of the SatNOGS network for increased data downlink volume. \n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36035.",
"published": "2024-04-05T14:27:29.512082Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-05T14:27:29.512098Z",
"modified": "2024-04-05T14:27:29.517431Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6364,
"topic": "gcn.circular",
"uuid": "20d01043-6ca8-4d17-9607-97f7eb3f0bad",
"title": "GRB 240402C: GRBAlpha detection",
"submitter": "Hop gcn.circular",
"authors": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"data": {
"date": "24/04/05 14:27:47 GMT",
"from": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36036"
},
"title": "GCN CIRCULAR",
"number": "36036",
"subject": "GRB 240402C: GRBAlpha detection"
},
"message_text": "M. Dafcikova, J. Ripa, M. Kolar (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. Duriskova, L. Szakszonova, J.-P. Breuer, F. Hroch (Masaryk U.), T. Urbanec, M. Kasal, A. Povalac (Brno U. of Technology), J. Hudec, J. Kapus, M. Frajt (Spacemanic s.r.o), R. Laszlo, M. Koleda (Needronix s.r.o), M. Smelko, P. Hanak, P. Lipovsky (Technical U. of Kosice), G. Galgoczi (Wigner Research Center/Eotvos U.), Y. Uchida, H. Poon, H. Matake (Hiroshima U.), N. Uchida (ISAS/JAXA), T. Bozoki (Eotvos U.), G. Dalya (Eotvos U.), T. Enoto (Kyoto U.), Zs. Frei (Eotvos U.), G. Friss (Eotvos U.), Y. Fukazawa, K. Hirose (Hiroshima U.), S. Hisadomi (Nagoya U.), Y. Ichinohe (Rikkyo U.), K. Kapas (Eotvos U.), L. L. Kiss (Konkoly Observatory), T. Mizuno (Hiroshima U.), K. Nakazawa (Nagoya U.), H. Odaka (Univ of Tokyo), J. Takatsy (Eotvos U.), K. Torigoe (Hiroshima U.), N. Kogiso, M. Yoneyama (Osaka Metropolitan U.), M. Moritaki (U. Tokyo), T. Kano (U. Michigan) -- the GRBAlpha collaboration.\n\nThe long-duration GRB 240402C (CALET/CGBM detection: trigger no. 1396070722; INTEGRAL/SPI-ACS peak detection at 2024-04-02 ~05:29:48 UT) was observed by the GRBAlpha 1U CubeSat (Pal et al. 2023, A&A, 677, 40; https://ui.adsabs.harvard.edu/abs/2023A%26A...677A..40P/abstract).\n\nThe detection was confirmed at the peak time 2024-04-02 05:30:53.0 UTC. The T90 duration measured by GRBAlpha is 91.0 s and the overall significance during T90 reaches 11 sigma in the 120-400 keV band.\n\nThe light curve obtained by GRBAlpha is available here: https://grbalpha.konkoly.hu/static/share/GRB240402C_GCN.pdf\n\nAll GRBAlpha detections are listed at: https://monoceros.physics.muni.cz/hea/GRBAlpha/\nGRBAlpha, launched on 2021 March 22, is a demonstration mission for a future CubeSat constellation (Werner et al. Proc. SPIE 2018). The detector of GRBAlpha consists of a 75 x 75 x 5 mm3 CsI scintillator read out by a SiPM array, covering the energy range from ~50 keV to ~1000 keV. To increase the duty cycle and the downlink rate, the upgrade of the on-board data acquisition software stack is in progress. The ground segment is also supported by the radio amateur community and it takes advantage of the SatNOGS network for increased data downlink volume. \n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36036.",
"published": "2024-04-05T14:27:53.559206Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-05T14:27:53.559220Z",
"modified": "2024-04-05T14:27:53.563000Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4573,
"topic": "gcn.circular",
"uuid": "dbbcd72d-e50c-4606-86ee-30fa3799a974",
"title": "LIGO/Virgo/KAGRA S231112ag: Retraction of GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "daniela.pascucci@ugent.be",
"data": {
"date": "23/11/12 13:12:25 GMT",
"from": "daniela.pascucci@ugent.be",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35000"
},
"title": "GCN CIRCULAR",
"number": "35000",
"subject": "LIGO/Virgo/KAGRA S231112ag: Retraction of GW compact binary merger candidate"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:\n\nThe trigger S231112ag is no longer considered to be a candidate of interest. Looking at the data, pipeline experts consider this trigger is not consistent with a signal.\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35000.",
"published": "2023-11-12T13:12:35.854557Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-12T13:12:35.854578Z",
"modified": "2023-11-12T13:12:35.859998Z",
"nonlocalizedevents": [
{
"event_id": "S231112a"
}
],
"targets": []
},
{
"id": 4576,
"topic": "gcn.circular",
"uuid": "934a7e9e-8b12-4731-b256-d1d92594243f",
"title": "GRB 231111A: GMG observation (correction)",
"submitter": "Hop gcn.circular",
"authors": "Rui-Zhi Li at Yunnan Astronomical Observatory, CAS <liruizhi@ynao.ac.cn>",
"data": {
"date": "23/11/12 14:40:17 GMT",
"from": "Rui-Zhi Li at Yunnan Astronomical Observatory, CAS <liruizhi@ynao.ac.cn>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35001"
},
"title": "GCN CIRCULAR",
"number": "35001",
"subject": "GRB 231111A: GMG observation (correction)"
},
"message_text": "R.-Z. Li, B.-T. Wang, J. Mao, X. Ding, J.-M. Bai (YNAO) report:\n\nWe observed the field of GRB 231111A (Melandri et al. GCN 34981) by the GMG telescope in Yunnan observatories. The observation began from UT 11:29:03 Nov 12, 2023, about 21.2 hours from the trigger. The preliminary results are shown as\n\n----------------------------------------------------\nUT\t\t\t\tfilter\tmag\n----------------------------------------------------\n2023-11-12T11:29:03.291\t\tR\t22.2 ± 0.4\n----------------------------------------------------\n\nWe apologize for any inconvenience this may have caused.\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35001.",
"published": "2023-11-12T14:40:29.367731Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-12T14:40:29.367751Z",
"modified": "2023-11-12T14:40:29.373337Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4577,
"topic": "gcn.circular",
"uuid": "52d2d8b4-d04a-4661-aaf7-147aca3679f8",
"title": "GRB231110A: Optical follow-up observations with Mephisto",
"submitter": "Hop gcn.circular",
"authors": "Tianrui Sun at Purple Mountain Obs,CAS <trsun@pmo.ac.cn>",
"data": {
"date": "23/11/12 15:11:08 GMT",
"from": "Tianrui Sun at Purple Mountain Obs,CAS <trsun@pmo.ac.cn>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35002"
},
"title": "GCN CIRCULAR",
"number": "35002",
"subject": "GRB231110A: Optical follow-up observations with Mephisto"
},
"message_text": "Tian-Rui Sun, Xin-Lei Chen, Xiangkun Liu, Yuan-Pei Yang, Tianyu Zhang, Helong Guo, Guowang Du, Haipeng Lei, Brajesh Kumar, Xiaowei Liu report on behalf of the Mephisto Collaboration:\n\nFollowing the detection of GRB 231111A by SWIFT (Melandri et al., GCN 34981, Osborne et al., GCN 34991 and GCN 34995), MASTER (Lipunov et al., GCN 34980, GCN 34983) , Nanshan/HMT (Jiang et al., GCN 34982), Git (Kumar et al., GCN 34984), YAHPT (Sun et al., GCN 34985), Gecam (Zhang et al, GCN 34990 and 34993), Mondy (Pankov et al., GCN 34994), Terskol Zeiss-2000 (Pankov et al., GCN 34996), Nastro Verde (Dainotti et al., GCN 34997), GMG (Mao et al., GCN 34999, GCN 35001), we conducted observations using the Multi-channel Photometric Survey Telescope (Mephisto) of Yunnan University at Lijiang Observatory (IAU code: 044) of Yunnan Astronomical Observatories, Chinese Academy of Sciences (CAS) to search and follow up its afterglow near SWIFT/UVOT position.\n\nWe simultaneously observed the target position with 60s exposure in u/g bands and v/r bands starting from 11 Nov 2023, UTC 14:49:05, about 1905 seconds after the burst.\n\nAt the beginning of our observation:\nFilter |Mag |Magerr | Time |reference \nMu |19.48| 0.12 | 2023-11-11T14:56:35 |Mephisto u\nMv |19.13| 0.07 | 2023-11-11T14:49:05 |Mephisto v\nMg |18.65| 0.04 | 2023-11-11T14:56:35 |Mephisto g\nMr |18.15| 0.04 | 2023-11-11T14:49:05 |Mephisto r\n\nTo do the flux calibration, we chose the exposure with the best image quality as the reference image, and used stars of signal-to-noise ratio (SNR) > 30 after removing variables by cross-matching with variable catalogs in each band to scale the flux level to that of the reference image. Atmospheric extinction corrections and instrumental magnitude zero points are applied to the reference image.\n\nMephisto is a 1.6-m wide-field multi-channel telescope, the first of its type in the world, capable of imaging the same field of view in three optical bands simultaneously. It will yield real-time, high-quality colors of unprecedented accuracy of billions of objects, enable fast and robust classification of variables and transients, and for the first time, deliver a panoramic and panchromatic documentary of our dynamic universe. The on-site telescope assemblage and commissioning were carried out in September 2022, and the first light with the small system of 4 filters (uviz) in dual channels was achieved on October 23, 2022. Mephisto is currently equipped with two commercial Andor iKon-XXL single-chip CCD cameras for the blue and yellow channels. Each camera covers an area about a quarter of the full field-of-view (2°in diameter).\n\n\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35002.",
"published": "2023-11-12T15:11:22.832617Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-12T15:11:22.832635Z",
"modified": "2023-11-12T15:11:22.838563Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4580,
"topic": "gcn.circular",
"uuid": "c71707c1-b200-46ad-a417-d3fb03b6825d",
"title": "GRB 231111A: Leavitt Observatory optical observations",
"submitter": "Hop gcn.circular",
"authors": "leavittob@gmail.com",
"data": {
"date": "23/11/12 17:16:00 GMT",
"from": "leavittob@gmail.com",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35003"
},
"title": "GCN CIRCULAR",
"number": "35003",
"subject": "GRB 231111A: Leavitt Observatory optical observations"
},
"message_text": "L. Moretti and E. Pavoni (Leavitt Observatory), in a large collaboration with:\nM.G. Dainotti (National Astronomical Observatory of Japan),\nY. Niino (Tokyo University, Institute of Astronomy),\nK. Kalinowski (Aarhus University, Department of Physics and Astronomy),\nB. De Simone (Universita' degli Studi Di Salerno)\nreport:\n\nWe imaged the field of GRB 231111A (Lipunov et al., GCN 34980; Melandri et al., GCN 34981; Jiang et al., GCN 34982; Lipunov et al., GCN 34983; Kumar et al., GCN 34984; Osborne et al., GCN 34991; Wen-Long Zhang et al., GCN 34993; Pankov et al., GCN 34994; Osborne et al., GCN 34995; Ruocco, GCN 34997; Li et al., GCN 35001) with the telescope of Leavitt Observatory, Italy. Member of:\n\nUAI/SSV - Unione Astrofili Italiani/sezione stelle variabili, GRB section.\nATA - Associazione Tuscolana di Astronomia.\n\nThe observations started 189 minutes after the BAT trigger, at 17:26:49 UT on 2023/11/11, with our RC telescope D%0 mm F/D=8.\n\nWeather conditions were medium, with light and variable cloud cover.\n\nWe co-added 15 images of 120 sec each, acquired from 17:26:49 to 18:20:58 UT. All images are R (Cousins) filtered, calibrated with master dark and master flat.\n\nWe confirm a fading afterglow in the error box of the astrometrically corrected position measured by Swift-XRT (GCN 34991), at the following coordinates +/- 2 arcsec:\n\nRA(J2000.0) = 19h 20m 45.25s\nDEC(J2000.0) = +52d 26' 09.9''\n\nThe result of our photometry is:\n\n-------------------------------------------------------------------------\nJD_UTC at mid-exposure mag Err Flt\n-------------------------------------------------------------------------\n2460260.2464583 20.1 +/- 0.2 R\n\n\nMagnitudes were estimated with the Gaia DR3 catalogue (*) and are not corrected for galactic dust extinction.\n\nThe message may be cited.\n\n(*) https://gea.esac.esa.int/archive/documentation/GEDR3/Data_processing/chap_cu5pho/cu5pho_sec_photSystem/cu5pho_ssec_photRelations.html\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35003.",
"published": "2023-11-12T17:16:11.216295Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-12T17:16:11.216315Z",
"modified": "2023-11-12T17:16:11.221457Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4581,
"topic": "gcn.circular",
"uuid": "4a8e515e-26fb-4ee6-ad85-888044778bc8",
"title": "GRB 231111A NUTTelA-TAO / BSTI Early Measurements",
"submitter": "Hop gcn.circular",
"authors": "Toktarkhan Komesh at Nazarbayev University <toktarkhan.komesh@nu.edu.kz>",
"data": {
"date": "23/11/12 18:00:28 GMT",
"from": "Toktarkhan Komesh at Nazarbayev University <toktarkhan.komesh@nu.edu.kz>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35004"
},
"title": "GCN CIRCULAR",
"number": "35004",
"subject": "GRB 231111A NUTTelA-TAO / BSTI Early Measurements"
},
"message_text": "T. Komesh (NU), B. Grossan (UCB, NU), Zh. Maksut (NU), Zh. Abdullayev (NU), M. Krugov (FAI), and E. Abdikamalov (NU) report on behalf of the Energetic Cosmos Laboratory:\n\nThe Nazarbayev University Transient Telescope at Assy-Turgen Astrophysical Observatory (NUTTelA-TAO) pointed at GRB231111A on receipt of an automated GCN / BAT position alert, observing in Sloan g', r' and i' bands, with the Burst Simultaneous Three-Channel Imager (BSTI; Grossan, Kumar & Smoot 2019, JHEA, 32, 14).\n\nWe started observations at UT 2023-11-11 14:18:02, 43 s after the BAT trigger. Observations were made under partially cloudy conditions. A new and changing source consistent with the XRT position (Osborne 2023, GCN 34991) was detected. Note that these observations provide essentially full-time coverage, simultaneous in all three bands. We report the following photometric values for the OT:\n\ntc-t0(s) g'(mag) r'(mag) i'(mag) exposure_time (s)\n---- ----- ----- ----- -----\n69 16.6 16.3 16.0 52.5\n133 16.8 16.3 16.4 75\n208 17.1 16.7 16.7 75\n283 17.2 16.8 16.8 75\n358 17.3 16.9 16.8 75\n433 17.5 17.2 17.0 75\n508 17.6 17.3 17.2 75\n583 17.6 17.4 17.3 75\n658 17.7 17.5 17.3 75\n733 18.0 17.7 17.3 75\n808 17.9 17.7 17.6 75\n883 18.1 17.9 17.6 75\n958 18.0 17.8 17.7 75\n1033 18.0 17.9 17.6 75\n1108 18.2 18.0 17.6 75\n1183 18.0 18.2 17.9 75\n1296 18.4 18.3 18.0 150\n1446 18.4 18.2 17.9 150\n\n\n\nUncertainties are estimated at ~ 0.1 mag for all three filters. tc-t0 = trigger time minus image center time. Calibration was done with 5 bright Pan-STARRS catalog stars on our images, and no other analysis or corrections.\n\nWe caution the reader that these are preliminary results, without color or other corrections, and will likely change in small measure. Please also note that times are approximate.\n\n----------------------------------\nNU = Nazarbayev University, Nur-Sultan, Kazakhstan\nUCB = University of California, Berkeley, USA\nFAI = Fesenkov Astrophysical Institute, Kazakhstan\n\nThis research has been funded by the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan (Grant No. AP14870504). The NUTTelA-TAO Team acknowledges the support of the staff of the Assy-Turgen Astrophysical Observatory, Almaty, Kazakhstan, and the Fesenkov Astrophysical Institute, Almaty, Kazkhstan.\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35004.",
"published": "2023-11-12T18:00:40.613484Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-12T18:00:40.613504Z",
"modified": "2023-11-12T18:00:40.619027Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4584,
"topic": "gcn.circular",
"uuid": "ba1e4313-c00b-4ca4-8e7d-071700404113",
"title": "GRB 231110A: AstroSat CZTI detection",
"submitter": "Hop gcn.circular",
"authors": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"data": {
"date": "23/11/12 19:05:57 GMT",
"from": "Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35005"
},
"title": "GCN CIRCULAR",
"number": "35005",
"subject": "GRB 231110A: 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-duration GRB 231110A which was also detected by Swift-BAT (D'Elia et al., GCN Circ. 34977), and GECAM-B (Wang et al., GCN Circ. 34992).\n\nThe source was clearly detected in the CZT detectors in the 20-200 keV energy range. The light curve peaks at 2023-11-10 21:19:35.25 UTC. The measured peak count rate associated with the burst is 246 (+54, -49) counts/s above the background in the combined data of all quadrants, with a total of 611 (+135, -146) counts. The local mean background count rate was 290 (+4, -5) counts/s. Using cumulative rates, we measure a T90 of 6 (+2, -2) s.\n\nThe source was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range. The light curve peaks at 2023-11-10 21:19:34.93 UTC. The measured peak count rate associated with the burst is 469 (+67, -71) counts/s above the background in the combined data of all quadrants, with a total of 957 (+229, -242) counts. The local mean background count rate was 1167 (+6, -7) counts/s. We measure a T90 of 5 (+3, -2) s from the cumulative Veto light curve.\n\nCZTI is built by a TIFR-led consortium of institutes across India, including VSSC, URSC, IUCAA, SAC, and PRL. The Indian Space Research Organisation funded, managed, and facilitated the project.\n\nCZTI GRB detections are reported regularly on the payload site at:\nhttp://astrosat.iucaa.in/czti/?q=grb\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35005.",
"published": "2023-11-12T19:06:08.614686Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-12T19:06:08.614717Z",
"modified": "2023-11-12T19:06:08.621783Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6365,
"topic": "gcn.circular",
"uuid": "f104c03d-6f18-41aa-b00c-403926eebc23",
"title": "GRB 240405A: 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": "24/04/05 15:17:52 GMT",
"from": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36037"
},
"title": "GCN CIRCULAR",
"number": "36037",
"subject": "GRB 240405A: Fermi GBM Final Real-time Localization"
},
"message_text": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 15:06:46 UT on 5 Apr 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240405A (trigger 734022411.49845 / 240405630).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 289.6, Dec = 37.8 (J2000 degrees, equivalent to J2000 19h 18m, 37d 47'), with a statistical uncertainty of 5.2 degrees.\n\nThe angle from the Fermi LAT boresight is 143.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240405630/quicklook/glg_skymap_all_bn240405630.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/2024/bn240405630/quicklook/glg_healpix_all_bn240405630.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240405630/quicklook/glg_lc_medres34_bn240405630.gif\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36037.",
"published": "2024-04-05T15:18:12.493426Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-05T15:18:12.493440Z",
"modified": "2024-04-05T15:18:12.499686Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6366,
"topic": "gcn.circular",
"uuid": "07ee658d-e199-4f66-a2f1-ed36fece0663",
"title": "GRB 240402C: Glowbug gamma-ray detection",
"submitter": "Hop gcn.circular",
"authors": "C.C. Cheung at Naval Research Lab <Teddy.Cheung@nrl.navy.mil>",
"data": {
"date": "24/04/05 17:03:54 GMT",
"from": "C.C. Cheung at Naval Research Lab <Teddy.Cheung@nrl.navy.mil>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36038"
},
"title": "GCN CIRCULAR",
"number": "36038",
"subject": "GRB 240402C: Glowbug gamma-ray detection"
},
"message_text": "C.C. Cheung, R. Woolf, M. Kerr, J.E. Grove (NRL), A. Goldstein (USRA), C.A. Wilson-Hodge, D. Kocevski (MSFC), and M.S. Briggs (UAH) report:\n \nThe Glowbug gamma-ray telescope [1,2], operating on the International Space Station, reports the detection of GRB 240402C, which was also detected by GRBAlpha (GCN 36036), INTEGRAL/SPI-ACS, and CALET/CGBM (Trigger 1396070722). \n\nUsing an adaptive window with a resolution of 32-ms, the burst onset is determined to be 2024-04-02 05:29:43.544 with a duration of 98.3 s and a total significance of about 16 sigma. The light curve comprises an initial double-peaked structure from T0 to T0+20s, and a complex multi-peaked structure from T0+60s to T0+80s.\n\nThe analysis results presented here are preliminary and use a response function that lacks a detailed characterization of the surrounding passive structure of the ISS.\n \nGlowbug is a NASA-funded technology demonstrator for sensitive, low-cost gamma-ray transient telescopes developed, built, and operated by the U.S. Naval Research Laboratory (NRL) with support from the University of Alabama in Huntsville, USRA, and NASA MSFC. It was launched on 2023 March 15 aboard the Department of Defense Space Test Programâs STP-H9 to the ISS. The detector comprises 12 large-area (15 cm x 15 cm) CsI:Tl panels covering the surface of a half cube, and two hexagonal (5-cm diameter, 10-cm length) CLLB scintillators, giving it a large field of view (instantaneous FoV ~2/3 sky) over a wide energy band of 50 keV to >2 MeV.\n \n[1] Grove, J.E. et al. 2020, Proc. Yamada Conf. LXXI, arXiv:2009.11959\n[2] Woolf, R.S. et al. 2022, Proc. SPIE, 12181, id. 121811O\n[3] Goldstein, A. et al. 2020, ApJ 895, 40, arXiv :1909.03006\n \nDistribution Statement A: Approved for public release. Distribution is unlimited.\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36038.",
"published": "2024-04-05T17:04:18.811797Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-05T17:04:18.811812Z",
"modified": "2024-04-05T17:04:18.817326Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 7807,
"topic": "gcn.circular",
"uuid": "2153a73c-b7ef-41d2-b555-cf1e890f5b4d",
"title": "Fermi GBM Sub-Threshold Detection of GRB 240516B",
"submitter": "Hop gcn.circular",
"authors": "Sarah Dalessi at UAH <sd0104@uah.edu>",
"data": {
"date": "24/05/23 00:17:44 GMT",
"from": "Sarah Dalessi at UAH <sd0104@uah.edu>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36534"
},
"title": "GCN CIRCULAR",
"number": "36534",
"subject": "Fermi GBM Sub-Threshold Detection of GRB 240516B"
},
"message_text": "S. Dalessi (UAH), S. Bala (USRA), P. Veres (UAH), and C. Meegan (UAH) report on behalf of the Fermi-GBM Team:\n\nAstroSat CZTI detected GRB 240516B at 03:41:01.51 UT (GCN 36527). There was a\nFermi-GBM onboard trigger 259s before the event (GCN 36499) and due to the Fermi-GBM trigger latency, were unable to trigger on this event.\n\nThe GBM targeted search (Goldstein et al. 2019 arXiv:1903.12597), the most sensitive, coherent search for GRB-like signals identified a transient most significantly on the 8.192 s\ntimescale, with a false alarm rate of 1.1e-05 Hz, using the standard search protocol with a S/N of 15.\n\nThe GBM targeted search event was found with the highest\nsignificance with a \"normal\" spectrum (Band function with\nEpeak = 230 keV, alpha = -1.0, beta = -2.3) for a GRB.\n\n\nThe on-ground calculated location, using the Fermi GBM trigger data,\nis RA = 145.4, Dec = -9.8 (J2000 degrees, equivalent to\nJ2000 3h 5m, +47d 6'), with a statistical uncertainty of 4 degrees.\n(radius, 1-sigma containment, statistical only. There is additionally a\nsystematic error which we have characterized as a core-plus-tail model,\nwith 90% of GRBs having a 3.7 deg error and a small tail suffering a\nlarger than 10 deg systematic error (Connaughton et al. 2015, ApJS, 216, 32)).\n\nThe angle from the Fermi LAT boresight is 41 degrees.\n\nThe GBM light curve single emission episode with a duration (T90)\nof about 50 s (50-300 keV). The time-averaged spectrum\nfrom T0+259.1 to T0+309.0 s is best fit by\na power law function with an exponential high-energy cutoff.\nThe power law index is -0.44 +/- 0.12 and the cutoff energy,\nparameterized as Epeak, is 220 +/- 19 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(6.15 +/- 0.36)E-06 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+278.9 s in the 10-1000 keV band is 2.6 +/- 0.2 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog:\nhttps://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html\n\nFor Fermi GBM data and info, please visit the official Fermi GBM Support Page:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36534.",
"published": "2024-05-23T00:17:53.842205Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-05-23T00:17:53.842225Z",
"modified": "2024-05-23T00:17:53.848791Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4618,
"topic": "gcn.circular",
"uuid": "ddf1f002-ae20-4a1f-befc-244bbdd020d9",
"title": "GRB 231111A: TNG tentative redshift",
"submitter": "Hop gcn.circular",
"authors": "Paolo D'Avanzo at INAF-OAB <pda.davanzo@gmail.com>",
"data": {
"date": "23/11/13 10:40:29 GMT",
"from": "Paolo D'Avanzo at INAF-OAB <pda.davanzo@gmail.com>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35007"
},
"title": "GCN CIRCULAR",
"number": "35007",
"subject": "GRB 231111A: TNG tentative redshift"
},
"message_text": "P. D'Avanzo (INAF-OAB), V. D'Elia (ASI/SSDC & INAF/OAR), D. B. Malesani (DAWN/NBI & Radboud Univ.), A. Melandri (INAF/OAR) , M. Cecconi, C. P. Padilla-Torres (INAF/TNG) report on behalf of the CIBO collaboration:\n\nWe report observations of GRB 231111A (Melandri et al. GCN Circ. 34981) with the 3.6m Telescopio Nazionale Galileo (TNG) equipped with DOLORES.\n\nWe acquired a spectrum of the optical source reported by Melandri et al. (GCN Circ. 34981). We obtained 2x1200 s with the LR-B grism, for a total exposure of 2400 s, covering the wavelength range 3500 - 8000 AA. The observations started on 2023-11-11 at 19:31:33 UT (i.e. about 5.2 hours after the GRB detection).\n\nThe reduced spectrum is rather noisy and extends down to at least 3600 AA, indicating that the redshift is likely lower than z ~ 2. From preliminary reduction and calibration we tentatively infer a redshift of z ~ 1.39 from the possible detection of MgII 2796,2803.\nFurther analysis is ongoing.\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35007.",
"published": "2023-11-13T10:40:40.849485Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-13T10:40:40.849524Z",
"modified": "2023-11-13T10:40:40.857414Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4621,
"topic": "gcn.circular",
"uuid": "c1e50024-14d9-4e04-98f2-8b12426621dd",
"title": "GRB 231104A: VZLUSAT-2 detection",
"submitter": "Hop gcn.circular",
"authors": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"data": {
"date": "23/11/13 11:04:18 GMT",
"from": "Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35008"
},
"title": "GCN CIRCULAR",
"number": "35008",
"subject": "GRB 231104A: 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 long-duration GRB 231104A (Fermi/GBM detection: GCN 34937; Fermi/LAT detection: GCN 34943; Swift/BAT detection: GCN 34938; AstroSat detection: GCN 34945; NuSTAR detection: GCN 34957; Konus/WIND trigger at 2023-11-04 01:47:39.141 UT, INTEGRAL/SPI-ACS peak detection at 2023-11-04 ~01:47:40 UT) was detected by the GRB detector on board of the VZLUSAT-2 3U CubeSat (https://www.vzlusat2.cz/en/).\n\nThe data acquisition was performed by the GRB detector unit no. 1. The detection was confirmed at the peak time 2023-11-04 01:47:39 UTC. The T90 duration is 26 s and the significance during T90 reaches 21 sigma.\n\nThe light curve obtained by VZLUSAT-2 is available here:\nhttps://vzlusat2.konkoly.hu/static/share/GRB231104A_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\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35008.",
"published": "2023-11-13T11:04:29.187345Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-13T11:04:29.187377Z",
"modified": "2023-11-13T11:04:29.193405Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6367,
"topic": "gcn.circular",
"uuid": "ab491e1d-4d0f-48cc-92d7-73d2d2a49391",
"title": "GRB 240405B: 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": "24/04/05 22:32:47 GMT",
"from": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36039"
},
"title": "GCN CIRCULAR",
"number": "36039",
"subject": "GRB 240405B: Fermi GBM Final Real-time Localization"
},
"message_text": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 22:22:27 UT on 5 Apr 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240405B (trigger 734048552.443682 / 240405932).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 262.8, Dec = 44.8 (J2000 degrees, equivalent to J2000 17h 31m, 44d 47'), with a statistical uncertainty of 8.7 degrees.\n\nThe angle from the Fermi LAT boresight is 55.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240405932/quicklook/glg_skymap_all_bn240405932.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/2024/bn240405932/quicklook/glg_healpix_all_bn240405932.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240405932/quicklook/glg_lc_medres34_bn240405932.gif\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36039.",
"published": "2024-04-05T22:33:08.471703Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-05T22:33:08.471718Z",
"modified": "2024-04-05T22:33:08.476663Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4624,
"topic": "gcn.circular",
"uuid": "1dbdcbac-cfe1-4cc2-a850-5bb92ac8ded9",
"title": "GRB 231111A: Afterglow redshift from OSIRIS+/GTC",
"submitter": "Hop gcn.circular",
"authors": "C. C. Thoene at ASU-CAS <christina.thoene@gmail.com>",
"data": {
"date": "23/11/13 11:53:53 GMT",
"from": "C. C. Thoene at ASU-CAS <christina.thoene@gmail.com>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35009"
},
"title": "GCN CIRCULAR",
"number": "35009",
"subject": "GRB 231111A: Afterglow redshift from OSIRIS+/GTC"
},
"message_text": "C. C. Thoene (ASU-CAS), A. de Ugarte Postigo (CNRS/OCA), L. Izzo (INAF/Capodimonte), F. Agui Fernandez (CAHA), F. Perez Toledo (GTC), M. Blazek (CAHA), J. Fynbo (DAWN/NBI), S. Geier (GTC) and N.R. Tanvir (Univ. Leicester) report:\n\nWe observed the afterglow of GRB 231111A (Melandri et al. GCN 34981, Jiang et al. GCN 34982) with OSIRIS+ at the 10.4m GTC on Nov. 11, 2023, starting at 20:19:13 UT, 6h after the GRB. We obtained 3x900s exposures under bad seeing conditions (1.9 arcsec) using the R1000B grism, which gives a wavelength coverage between 3700 and 7800 A. At the time of observations, the afterglow had a magnitude of r~20.2 as determined from the acquisition image.\n\nIn the combined spectrum we detect the MgII 2796,2803 Ã
doublet and faint lines of FeII 2585 and 2600 Ã
, which results in a redshift of z=1.179. TNG (DâAvanzo et al. GCN 35007) also claims the detection of a MgII doublet, however, at their reported redshift of z=1.39, no lines are present in our spectrum. No fine-structure lines are detected, making the redshift of 1.179 strictly seen as a lower limit. However, given the lack of further emission or absorption features in the spectral range and the upper limit of z~2 due to the detection of continuum down to 3650 Ã
(similar to the claim of D'Avanzo et al. GCN 35007) we expect this to be the actual redshift of the GRB.\n\nWe acknowledge the excellent support by the GTC staff. \n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35009.",
"published": "2023-11-13T11:54:04.240224Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-13T11:54:04.240247Z",
"modified": "2023-11-13T11:54:04.249941Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 6368,
"topic": "gcn.circular",
"uuid": "05abc0c4-66e8-4ef4-aa39-cf2bb3591b11",
"title": "Fermi GRB 240405B: Global MASTER-Net observations report",
"submitter": "Hop gcn.circular",
"authors": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"data": {
"date": "24/04/05 23:16:14 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36040"
},
"title": "GCN CIRCULAR",
"number": "36040",
"subject": "Fermi GRB 240405B: 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-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB 240405B ( Fermi GBM team, GCN 36039) errorbox 1885 sec after notice time and 1920 sec after trigger time at 2024-04-05 22:54:27 UT, with upper limit up to 19.4 mag. The observations began at zenith distance = 34 deg. The sun altitude is -37.2 deg.\n\nThe galactic latitude b = 32 deg., longitude l = 71 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id$15539\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 1950 | 2024-04-05 22:54:27 | MASTER-Tavrida | (17h 22m 31.42s , +45d 05m 50.3s) | C | 60 | 19.2 |\n 2101 | 2024-04-05 22:56:58 | MASTER-Tavrida | (17h 31m 17.62s , +43d 11m 34.5s) | C | 60 | 19.0 |\n 2253 | 2024-04-05 22:59:30 | MASTER-Tavrida | (17h 10m 24.70s , +43d 14m 19.7s) | C | 60 | 19.1 |\n 2414 | 2024-04-05 23:02:11 | MASTER-Tavrida | (17h 14m 28.16s , +47d 00m 34.6s) | C | 60 | 19.3 |\n 2640 | 2024-04-05 23:05:57 | MASTER-Tavrida | (17h 36m 34.61s , +47d 00m 21.4s) | C | 60 | 19.2 |\n 2795 | 2024-04-05 23:08:32 | MASTER-Tavrida | (17h 20m 20.88s , +41d 18m 01.9s) | C | 60 | 19.4 |\n 2867 | 2024-04-05 23:09:44 | MASTER-Tavrida | (17h 22m 34.70s , +45d 06m 27.5s) | C | 60 | 19.3 |\n 2939 | 2024-04-05 23:10:56 | MASTER-Tavrida | (17h 33m 51.42s , +45d 07m 19.3s) | C | 60 | 19.1 |\nFilter C is a clear (unfiltred) band.\n\n\nThe observation and reduction will continue.\nThe message may be cited.\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36040.",
"published": "2024-04-05T23:16:30.452244Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-05T23:16:30.452261Z",
"modified": "2024-04-05T23:16:30.459629Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4630,
"topic": "gcn.circular",
"uuid": "b51ec7b2-de89-4975-843c-c7c82d21d2bb",
"title": "LIGO/Virgo/KAGRA S231113bb: Identification of a GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "daniela.pascucci@ugent.be",
"data": {
"date": "23/11/13 14:43:37 GMT",
"from": "daniela.pascucci@ugent.be",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35010"
},
"title": "GCN CIRCULAR",
"number": "35010",
"subject": "LIGO/Virgo/KAGRA S231113bb: Identification of a GW compact binary merger candidate"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:\n\nWe identified the compact binary merger candidate S231113bb during real-time processing of data from LIGO Hanford Observatory (H1) and LIGO Livingston Observatory (L1) at 2023-11-13 12:26:23.884 UTC (GPS time: 1383913601.884). The candidate was found by the GstLAL [1] and MBTA [2] analysis pipelines.\n\nS231113bb is an event of interest because its false alarm rate, as estimated by the online analysis, is 5.6e-08 Hz, or about one in 6 months. The event's properties can be found at this URL:\n\nhttps://gracedb.ligo.org/superevents/S231113bb\n\nThe classification of the GW signal, in order of descending probability, is BBH (96%), Terrestrial (4%), NSBH (<1%), or BNS (<1%).\n\nAssuming the candidate is astrophysical in origin, the probability that the lighter compact object is consistent with a neutron star mass (HasNS) is <1%. [3] Using the masses and spins inferred from the signal, the probability of matter outside the final compact object (HasRemnant) is <1%. [3] Both HasNS and HasRemnant consider the support of several neutron star equations of state. The probability that either of the binary components lies between 3 and 5 solar masses (HasMassGap) is <1%.\n\nTwo sky maps are available at this time and can be retrieved from the GraceDB event page:\n * bayestar.multiorder.fits,1, an initial localization generated by BAYESTAR [4], distributed via GCN notice about 27 seconds after the candidate event time.\n * bayestar.multiorder.fits,2, an initial localization generated by BAYESTAR [4], distributed via GCN notice about 5 minutes after the candidate event time.\n\nThe preferred sky map at this time is bayestar.multiorder.fits,2. For the bayestar.multiorder.fits,2 sky map, the 90% credible region is 2716 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 4900 +/- 1642 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] Tsukada et al. PRD 108, 043004 (2023) and Ewing et al. arXiv:2305.05625 (2023)\n [2] Aubin et al. CQG 38, 095004 (2021)\n [3] Chatterjee et al. ApJ 896, 54 (2020)\n [4] Singer & Price PRD 93, 024013 (2016)\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35010.",
"published": "2023-11-13T14:43:48.361056Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-13T14:43:48.361096Z",
"modified": "2023-11-13T14:43:48.370393Z",
"nonlocalizedevents": [
{
"event_id": "S231113b"
}
],
"targets": []
},
{
"id": 4633,
"topic": "gcn.circular",
"uuid": "6a7c4537-3370-4dc0-8e3c-bb1599d0c6cc",
"title": "GRB 231110A: Swift-UVOT Upper Limits",
"submitter": "Hop gcn.circular",
"authors": "N. Klingler at NASA-GSFC/UMBC/CRESST II <noelklingler@gmail.com>",
"data": {
"date": "23/11/13 15:10:22 GMT",
"from": "N. Klingler at NASA-GSFC/UMBC/CRESST II <noelklingler@gmail.com>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35011"
},
"title": "GCN CIRCULAR",
"number": "35011",
"subject": "GRB 231110A: Swift-UVOT Upper Limits"
},
"message_text": "Swift-UVOT has performed follow-up observations of the Swift-BAT-detected burst GRB 231110A (Kennea et al. GCN 34977), collecting 2.8 ks of observations between T0+8.80 ks and T0+27.45 ks. No source was detected in the UVOT data at the position of the X-ray source reported by Evans et al. (GCN 34986).\n\n3-sigma upper limits (AB) using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) are:\n\nFilter T_start(s) T_stop(s) Exp(s) Mag\nV\t\t 8893\t\t 9216\t 314.67\t>19.55\nB\t\t14638\t\t15545\t 881.77\t>21.00\nU\t\t26828\t\t27450\t 604.93\t>21.67\nW1\t\t25992\t\t26822\t 885.58\t>21.76\nwhite\t\t15545\t\t15695\t 147.43\t>21.68\n\nThe magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.198 in the direction of the burst (Schlegel et al. 1998).\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35011.",
"published": "2023-11-13T15:10:36.433028Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-13T15:10:36.433058Z",
"modified": "2023-11-13T15:10:36.438885Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4635,
"topic": "gcn.circular",
"uuid": "129dea64-d381-47f1-84f0-5da612a009b5",
"title": "GRB 231111A: Xinglong-2.16m optical observations",
"submitter": "Hop gcn.circular",
"authors": "Dong Xu at NAOC/CAS <dxu@nao.cas.cn>",
"data": {
"date": "23/11/13 15:33:47 GMT",
"from": "Dong Xu at NAOC/CAS <dxu@nao.cas.cn>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35012"
},
"title": "GCN CIRCULAR",
"number": "35012",
"subject": "GRB 231111A: Xinglong-2.16m optical observations"
},
"message_text": "S.Q. Jiang, Z.P. Zhu, S.Y. Fu, J. An, X. Liu, T.H. Lu, D. Xu (NAOC) report:\n\nWe observed the optical afterglow of GRB 231111A detected by Swift (Melandri et al., GCN 34981) using the 2.16m telescope\nlocated at Xinglong, Hebei, China, equipped with the BFOSC camera. Observations started at 14:34:11 UT on 2023-11-11 (i.e., 16.87 min after the Swift/BAT trigger), and 3x200, 9x300 s frames were obtained in the R-band.\n\nPreliminary photometric results of the optical afterglow (e.g., Melandri et al. GCN 34981; Jiang et al. GCN 34982; Lipunov et al. GCN 34983; Kumar et al. GCN 34984; Sun et al. GCN 34985; Pankov et al. GCN 34994; Ruocco et al. GCN 34997; Li et al. GCN 35001; Sun et al. GCN 35002; Moretti et al. GCN 35003; Komesh et al. GCN 35004) are as follows:\n\nTmid-T0 (day) Filter Magnitude (5-sigma)\n 0.0153 R 17.89 +/- 0.01\n 0.8523 R >21.6\n\ncalibrated with the nearby Pan-STARRS field.\n\nWe thank the great support of the Xinglong-2.16m staff.\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35012.",
"published": "2023-11-13T15:33:58.069626Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-13T15:33:58.069646Z",
"modified": "2023-11-13T15:33:58.075711Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4637,
"topic": "gcn.circular",
"uuid": "eefd5780-a3db-4eae-9ae9-824c70e2ab3f",
"title": "GRB 231106A: Glowbug gamma-ray detection",
"submitter": "Hop gcn.circular",
"authors": "C.C. Cheung at Naval Research Lab <Teddy.Cheung@nrl.navy.mil>",
"data": {
"date": "23/11/13 15:39:22 GMT",
"from": "C.C. Cheung at Naval Research Lab <Teddy.Cheung@nrl.navy.mil>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35013"
},
"title": "GCN CIRCULAR",
"number": "35013",
"subject": "GRB 231106A: Glowbug gamma-ray detection"
},
"message_text": "C.C. Cheung, M. Kerr, J. E. Grove, R. Woolf (NRL), A. Goldstein (USRA), C.A. Wilson-Hodge (MSFC), and M.S. Briggs (UAH) report:\n\nThe Glowbug gamma-ray telescope [1,2], operating on the International Space Station, reports the detection of GRB 231106A, which was also detected by Fermi/GBM, CALET, and AstroSat/CZTI (GCN 34956, 34965, 34966).\n\nUsing an adaptive window with a resolution of 32-ms, the burst onset is determined to be 2023-11-06 18:12:49.696. The light curve comprises an initial peak followed by a multi-peaked structure as observed by CALET (GCN 34965).\n\nIn the Glowbug data, the initial peak has a duration of 6.1 s and a total significance of about 24.1 sigma. Using a standard power-law function with an exponential high-energy cutoff [3] to model the emission over this duration results in a photon index dN/dE~E^x of x=0.4 and a cutoff energy (\"Epeak\") of 356 keV. The modeled 10-10000 keV fluence is 1.9e-06 erg/cm^2.\n\nThe onset of the later multi-peaked structure observed by Glowbug is determined to be 2023-11-06 18:13:18.368 with a duration of 26.6 s and a total significance of about 46.1 sigma. Using a standard power-law function with an exponential high-energy cutoff to model the emission over this duration results in a photon index of x=2.0 and an Epeak of 204 keV. The modeled 10-10000 keV fluence is 4.2e-06 erg/cm^2.\n\nThe analysis results presented here are preliminary and use a response function that lacks a detailed characterization of the surrounding passive structure of the ISS.\n\nGlowbug is a NASA-funded technology demonstrator for sensitive, low-cost gamma-ray transient telescopes developed, built, and operated by the U.S. Naval Research Laboratory (NRL) with support from the University of Alabama in Huntsville, USRA, and NASA MSFC. It was launched on 2023 March 15 aboard the Department of Defense Space Test Programâs STP-H9 to the ISS. The detector comprises 12 large-area (15 cm x 15 cm) CsI:Tl panels covering the surface of a half cube, and two hexagonal (5-cm diameter, 10-cm length) CLLB scintillators, giving it a large field of view (instantaneous FoV ~2/3 sky) over a wide energy band of 50 keV to >2 MeV.\n\n[1] Grove, J.E. et al. 2020, Proc. Yamada Conf. LXXI, arXiv:2009.11959\n[2] Woolf, R.S. et al. 2022, Proc. SPIE, 12181, id. 121811O\n[3] Goldstein, A. et al. 2020, ApJ 895, 40, arXiv :1909.03006\n\nDistribution Statement A: Approved for public release. Distribution is unlimited.\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35013.",
"published": "2023-11-13T15:39:30.124946Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-13T15:39:30.124965Z",
"modified": "2023-11-13T15:39:30.634642Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4645,
"topic": "gcn.circular",
"uuid": "0a0e5727-ad32-41c1-b1a6-a13e4f8d5026",
"title": "LIGO/Virgo/KAGRA S231113bw: Identification of a GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "brina.martinez@ligo.org",
"data": {
"date": "23/11/13 20:28:39 GMT",
"from": "brina.martinez@ligo.org",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35016"
},
"title": "GCN CIRCULAR",
"number": "35016",
"subject": "LIGO/Virgo/KAGRA S231113bw: Identification of a GW compact binary merger candidate"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:\n\nWe identified the compact binary merger candidate S231113bw during real-time processing of data from LIGO Hanford Observatory (H1) and LIGO Livingston Observatory (L1) at 2023-11-13 20:04:17.911 UTC (GPS time: 1383941075.911). The candidate was found by the CWB [1], GstLAL [2], MBTA [3], PyCBC Live [4], and SPIIR [5] analysis pipelines.\n\nS231113bw is an event of interest because its false alarm rate, as estimated by the online analysis, is 1.4e-08 Hz, or about one in 2 years. The event's properties can be found at this URL:\n\nhttps://gracedb.ligo.org/superevents/S231113bw\n\nThe classification of the GW signal, in order of descending probability, is BBH (79%), NSBH (17%), Terrestrial (4%), or BNS (<1%).\n\nAssuming the candidate is astrophysical in origin, the probability that the lighter compact object is consistent with a neutron star mass (HasNS) is <1%. [6] Using the masses and spins inferred from the signal, the probability of matter outside the final compact object (HasRemnant) is <1%. [6] Both HasNS and HasRemnant consider the support of several neutron star equations of state. The probability that either of the binary components lies between 3 and 5 solar masses (HasMassgap) is 6%.\n\nTwo sky maps are available at this time and can be retrieved from the GraceDB event page:\n * bayestar.multiorder.fits,1, an initial localization generated by BAYESTAR [7], distributed via GCN notice about 32 seconds after the candidate event time.\n * bayestar.multiorder.fits,2, an initial localization generated by BAYESTAR [7], distributed via GCN notice about 5 minutes after the candidate event time.\n\nThe preferred sky map at this time is bayestar.multiorder.fits,2. For the bayestar.multiorder.fits,2 sky map, the 90% credible region is 1499 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 1431 +/- 426 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] Klimenko et al. PRD 93, 042004 (2016)\n [2] Tsukada et al. PRD 108, 043004 (2023) and Ewing et al. arXiv:2305.05625 (2023)\n [3] Aubin et al. CQG 38, 095004 (2021)\n [4] Dal Canton et al. ApJ 923, 254 (2021)\n [5] Chu et al. PRD 105, 024023 (2022)\n [6] Chatterjee et al. ApJ 896, 54 (2020)\n [7] Singer & Price PRD 93, 024013 (2016)\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35016.",
"published": "2023-11-13T20:28:50.086262Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-13T20:28:50.086300Z",
"modified": "2023-11-13T20:28:50.092638Z",
"nonlocalizedevents": [
{
"event_id": "S231113b"
}
],
"targets": []
},
{
"id": 4638,
"topic": "gcn.circular",
"uuid": "0a17868d-608c-43e9-8ffa-58cf53abe665",
"title": "GRB231111A: MDM 2.4m Hiltner Telescope Observation",
"submitter": "Hop gcn.circular",
"authors": "Tianrui Sun at Purple Mountain Obs,CAS <trsun@pmo.ac.cn>",
"data": {
"date": "23/11/13 16:57:13 GMT",
"from": "Tianrui Sun at Purple Mountain Obs,CAS <trsun@pmo.ac.cn>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35014"
},
"title": "GCN CIRCULAR",
"number": "35014",
"subject": "GRB231111A: MDM 2.4m Hiltner Telescope Observation"
},
"message_text": "\nTian-Rui Sun, Tian-Ci Zheng, Hui-Yang Mao, Jiang-Tao Li report:\n\nFollowing the detection of GRB 231111A by SWIFT (Melandri et al., GCN 34981; Osborne et al., GCN 34991;GCN 34995), MASTER (Lipunov et al., GCN 34980; GCN 34983), Nanshan/HMT (Jiang et al., GCN 34982), GIT (Kumar et al., GCN 34984), YAHPT (Sun et al., GCN 34985), GECAM (Zhang et al., GCN 34990; GCN 34993), Mondy (Pankov et al., GCN 34994), Terskol Zeiss-2000 (Pankov et al., GCN 34996), Nastro Verde (Dainotti et al., GCN 34997), GMG (Mao et al., GCN 34999; GCN 35001), Mephisto (Sun et al., GCN 35002), Leavitt (Moretti et al., GCN 35003), NUTTelA-TAO (Komesh et al., GCN 35004) and Xinglong-2.16m (Jiang et al., GCN 35012), we conducted observations using the MDM 2.4m Hiltner telescope with the clear filter.\n\nThis observation began from 2023-11-12T01:44:16.415, about 11.4 hours after the burst.\n\nThe PSF photometry results are shown as :\n----------------------------------------------------\nUT exposure filter mag magerr\n------------------------------------------------------\n2023-11-12T01:44:16.415 600 Clear 20.7669 +/- 0.0622\n2023-11-13T01:35:18.404 600 Clear 22.1815 +/- 0.0697\n------------------------------------------------------\n\n\nWe used the GAIA-DR3 catalogue (G mag) as the magnitude reference for calibration.\n\n\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35014.",
"published": "2023-11-13T16:57:24.704797Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-13T16:57:24.704830Z",
"modified": "2023-11-13T16:57:24.726368Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4639,
"topic": "gcn.circular",
"uuid": "a4bb56c2-1524-41c6-8284-667d203a367b",
"title": "GRB 231110A: Swift-BAT refined analysis",
"submitter": "Hop gcn.circular",
"authors": "Mike Moss at NASA GSFC <mikejmoss3@gmail.com>",
"data": {
"date": "23/11/13 17:16:36 GMT",
"from": "Mike Moss at NASA GSFC <mikejmoss3@gmail.com>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35015"
},
"title": "GCN CIRCULAR",
"number": "35015",
"subject": "GRB 231110A: Swift-BAT refined analysis"
},
"message_text": "S. Laha (GSFC/UMBC), S. D. Barthelmy (GSFC),\nV. D'Elia (SSDC & INAF-OAR), H. A. Krimm (NSF),\nA. Y. Lien (U Tampa), C. B. Markwardt (GSFC),\nM. J. Moss (GSFC), D. M. Palmer (LANL),\nT. Parsotan (GSFC/UMBC), T. Sakamoto (AGU),\nM. Stamatikos (OSU) (i.e. the Swift-BAT team):\n\nUsing the data set from T-239 to T+963 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 231110A (trigger #1195733)\n(D'Elia, et al., GCN Circ. 34977). The BAT ground-calculated position is\nRA, Dec = 356.244, 82.630 deg which is\n RA(J2000) = 23h 44m 58.7s\n Dec(J2000) = +82d 37' 48.6\"\nwith an uncertainty of 1.2 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 34%.\n\nThe BAT light curve shows a single pulse structure with a duration of ~ 11\nseconds and peaking ~1.5 seconds after the trigger time.\nT90 (15-350 keV) is 11.34 +- 1.56 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-1.60 to T+12.32 sec is best fit by a simple\npower-law model. The power law index of the time-averaged spectrum is\n1.35 +- 0.11. The fluence in the 15-150 keV band is 1.5 +- 0.1 x 10^-06 erg/cm2.\nThe 1-sec peak photon flux measured from T+0.63 sec in the 15-150 keV band\nis 3.4 +- 0.4 ph/cm2/sec. All the quoted errors are at the 90% confidence\nlevel.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/1195733/BA/\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35015.",
"published": "2023-11-13T17:16:47.328794Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-13T17:16:47.328814Z",
"modified": "2023-11-13T17:16:47.334395Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4650,
"topic": "gcn.circular",
"uuid": "97d0575c-db10-4252-9dac-52801afd70e3",
"title": "LIGO/Virgo/KAGRA S231113bw: Coverage and upper limits from MAXI/GSC observations",
"submitter": "Hop gcn.circular",
"authors": "Satoshi Sugita at Aoyama Gakuin U. <sugita@phys.aoyama.ac.jp>",
"data": {
"date": "23/11/13 22:32:16 GMT",
"from": "Satoshi Sugita at Aoyama Gakuin U. <sugita@phys.aoyama.ac.jp>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35017"
},
"title": "GCN CIRCULAR",
"number": "35017",
"subject": "LIGO/Virgo/KAGRA S231113bw: Coverage and upper limits from MAXI/GSC observations"
},
"message_text": "H. Nishikawa, S. Sugita, M. Serino, H. Hiramatsu, Y. Kondo (AGU),\nN. Kawai (RIKEN), H. Negoro, M. Nakajima (Nihon U.),\nT. Mihara (RIKEN),\nY. Kawakubo (LSU)\nreport on behalf of the MAXI team:\n\nWe examined MAXI/GSC all-sky X-ray images (2-20 keV)\nafter compact binary merger candidate S231113bw at 2023-11-13 20:04:17\nUTC (GCN 35016).\n\nAt the trigger time of S231113bw, the high-voltage of MAXI/GSC was off,\nand it was turned on at T0+285 sec (+4.8 min).\nThe first one-orbit (92 min) scan observation with GSC after the event\ncovered 53%\nof the 90% credible region of the bayestar skymap from 20:09:15 to\n21:34:10 UTC (T0+298 to T0+5393 sec).\n\nNo significant new source was found in the region in the one-orbit\nscan 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\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35017.",
"published": "2023-11-13T22:32:28.413904Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-13T22:32:28.413933Z",
"modified": "2023-11-13T22:32:28.421260Z",
"nonlocalizedevents": [
{
"event_id": "S231113b"
}
],
"targets": []
},
{
"id": 4653,
"topic": "gcn.circular",
"uuid": "a3ceade0-4990-4ba7-be12-0d3076a9e803",
"title": "LIGO/Virgo/KAGRA S231113bb: Updated Sky localization",
"submitter": "Hop gcn.circular",
"authors": "Charlie Hoy at University of Portsmouth <charlie.hoy@port.ac.uk>",
"data": {
"date": "23/11/13 23:32:55 GMT",
"from": "Charlie Hoy at University of Portsmouth <charlie.hoy@port.ac.uk>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35018"
},
"title": "GCN CIRCULAR",
"number": "35018",
"subject": "LIGO/Virgo/KAGRA S231113bb: 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 S231113bb (GCN Circular 35010). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.multiorder.fits, distributed via GCN Notice, is available for retrieval from the GraceDB event page:\n\nhttps://gracedb.ligo.org/superevents/S231113bb\n\nFor the Bilby.multiorder.fits sky map, the 90% credible region is 2172 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 3260 +/- 1181 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) and Morisaki et al. arXiv:2307.13380 (2023)\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35018.",
"published": "2023-11-13T23:33:06.574701Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-13T23:33:06.574720Z",
"modified": "2023-11-13T23:33:06.580291Z",
"nonlocalizedevents": [
{
"event_id": "S231113b"
}
],
"targets": []
},
{
"id": 4657,
"topic": "gcn.circular",
"uuid": "01961142-2fc9-4a2b-b81b-621e3bc485bf",
"title": "LIGO/Virgo/KAGRA S231113cd: 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": "23/11/14 01:30:52 GMT",
"from": "Motoko Serino at Aoyama Gakuin U. <serino@phys.aoyama.ac.jp>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35019"
},
"title": "GCN CIRCULAR",
"number": "35019",
"subject": "LIGO/Virgo/KAGRA S231113cd: Coverage and upper limits from MAXI/GSC observations"
},
"message_text": "Y. Kondo, S. Sugita, M. Serino, H. Hiramatsu, H. Nishikawa (AGU),\nN. Kawai (RIKEN), H. Negoro, M. Nakajima (Nihon U.),\nT. Mihara (RIKEN),\nY. Kawakubo (LSU)\nreport on behalf of the MAXI team:\n\nWe examined MAXI/GSC all-sky X-ray images (2-20 keV)\nafter compact binary merger candidate S231113cd at 2023-11-13 22:12:17 UTC.\n\nAt the trigger time of S231113cd, the high-voltage of MAXI/GSC was off,\nand it was turned on at T0+105 sec (+1.8 min).\nThe first one-orbit (92 min) scan observation with GSC after the event covered 100%\nof the 90% credible region of the cwb skymap from 23:02:32 to 23:23:40 UTC (T0+3015 to T0+4283 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\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35019.",
"published": "2023-11-14T01:31:02.553296Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-14T01:31:02.553328Z",
"modified": "2023-11-14T01:31:02.560508Z",
"nonlocalizedevents": [
{
"event_id": "S231113c"
}
],
"targets": []
},
{
"id": 4660,
"topic": "gcn.circular",
"uuid": "4bebfa02-2f65-41e3-bdb5-5af38bd08b35",
"title": "GRB 231110A: CALET Gamma-Ray Burst Monitor detection",
"submitter": "Hop gcn.circular",
"authors": "Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>",
"data": {
"date": "23/11/14 03:07:36 GMT",
"from": "Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35020"
},
"title": "GCN CIRCULAR",
"number": "35020",
"subject": "GRB 231110A: CALET Gamma-Ray Burst Monitor detection"
},
"message_text": "S. Sugita, A. Yoshida, T. Sakamoto (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 long GRB 231110A (Swift detection: D'Elia et al., GCN Circ. 34977;\nGECAM-B detection: Wang et al., GCN Circ. 34992; AstroSat CZTI\ndetection: Navaneeth et al., GCN Circ. 35005; Glowbug gamma-ray\ndetection: Cheung et al., GCN Circ. 35006; Swift-BAT refined analysis:\nLaha et al., GCN Circ. 35015) triggered the CALET Gamma-ray Burst\nMonitor (CGBM) at 21:19:35.19 UTC on 10 November 2023\n(http://cgbm.calet.jp/cgbm_trigger/flight/1383686313/index.html).\nThe burst signal was seen by all CGBM detectors. No real-time\nCGBM GCN notice was distributed about this trigger because\nthe real-time communication from the ISS was off (loss of signal).\n\nThe burst light curve shows a single pulse that starts\nat T-1.0 sec, peaks at T+0.5 sec, and ends at T+1.5 sec.\nThe T90 and T50 durations measured by the SGM data are 2.1 +/- 0.2 sec\nand 1.1 +/- 0.1 sec (40-1000 keV), respectively.\n\nThe ground-processed light curve is available at\n\nhttp://cgbm.calet.jp/cgbm_trigger/ground/1383686313/index.html\n\nThe CALET data used in this analysis are provided by\nthe Waseda CALET Operation Center located at Waseda University.\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35020.",
"published": "2023-11-14T03:07:46.567039Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-14T03:07:46.567060Z",
"modified": "2023-11-14T03:07:46.573150Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4661,
"topic": "gcn.circular",
"uuid": "340ba6be-7613-429e-95db-00bf8797fe97",
"title": "LIGO/Virgo/KAGRA S231113bw: Upper limits from Fermi-GBM Observations",
"submitter": "Hop gcn.circular",
"authors": "Peter Veres at University of Alabama in Huntsville <veresp@gmail.com>",
"data": {
"date": "23/11/14 03:11:36 GMT",
"from": "Peter Veres at University of Alabama in Huntsville <veresp@gmail.com>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35021"
},
"title": "GCN CIRCULAR",
"number": "35021",
"subject": "LIGO/Virgo/KAGRA S231113bw: Upper limits from Fermi-GBM Observations"
},
"message_text": "P. Veres (UAH) reports on behalf of the Fermi-GBM Team:\n\n\"For S231113bw (GCN 35016) and using the initial bayestar skymap, Fermi-GBM was observing 37% 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 S231113bw. 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 RA(0.7, Dec\u0012.6 with a radius of 67.4 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 2.0 4.3\n1.024 s: 0.39 0.49 1.2\n8.192 s: 0.097 0.15 0.35\n\nAssuming the median luminosity distance of 1431 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: 0.46 0.68 2.5\n1.024s: 0.15 0.17 0.69\n8.192s: 0.037 0.051 0.20\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35021.",
"published": "2023-11-14T03:11:43.946724Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-14T03:11:43.946742Z",
"modified": "2023-11-14T03:11:43.952389Z",
"nonlocalizedevents": [
{
"event_id": "S231113b"
}
],
"targets": []
},
{
"id": 4664,
"topic": "gcn.circular",
"uuid": "ee58f07f-35e1-4e7f-9584-69381b66b3a3",
"title": "SGRJ1555-5402: Swift/BAT-GUANO arcminute localization of a SGR flare",
"submitter": "Hop gcn.circular",
"authors": "Samuele Ronchini at PSU <sjs8171@psu.edu>",
"data": {
"date": "23/11/14 03:29:14 GMT",
"from": "Samuele Ronchini at PSU <sjs8171@psu.edu>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35022"
},
"title": "GCN CIRCULAR",
"number": "35022",
"subject": "SGRJ1555-5402: Swift/BAT-GUANO arcminute localization of a SGR flare"
},
"message_text": "Aaron Tohuvavohu (U Toronto), James DeLaunay (PSU), Gayathri Raman (PSU), Jamie A. Kennea (PSU), Tyler Parsotan (NASA GSFC), Samuele Ronchini (PSU) report:\n\nSwift/BAT did not localize SGRJ1555-5402 onboard (T0: 2023-11-11T21:35:11.4 UTC, Fermi trigger n. 721431316).\n\nThe Fermi 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 in a 0.128 s analysis time bin with a sqrt(TS) of 29.2, starting at T0 - 0.128 s.\nAn arcminute localization is found with DeltaLLHOut of 86.12 and a DeltaLLHPeak of 112.11.\n\nFrom the spectral template, the best fit value of the peak energy is 77.6 keV.\n\nSee Section 9.1 and Figures 10 and 17 in the NITRATES paper for brief descriptions and interpretations of sqrt(TS), DeltaLLHPeak, and DeltaLLHOut.\n\nThe BAT position is\nRA, Dec = 238.818, -54.077 deg which is\n RA(J2000) = 15h 55m 16.32s\n Dec(J2000) = -54d 04m 37.20s\nwith an estimated uncertainty of 5 arcmin radius.\n\nGUANO is a fully autonomous, extremely low latency, spacecraft\ncommanding pipeline designed for targeted recovery of BAT event mode\ndata around the times of compelling astrophysical events to enable\nmore sensitive GRB searches.\n\nA live reporting of Swift/BAT event data recovered by GUANO can be\nfound at: https://www.swift.psu.edu/guano/\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35022.",
"published": "2023-11-14T03:29:24.564508Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-14T03:29:24.564527Z",
"modified": "2023-11-14T03:29:24.570158Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4668,
"topic": "gcn.circular",
"uuid": "95d130f3-5afe-45b1-b876-cfde57769846",
"title": "LIGO/Virgo/KAGRA S231114n: Identification of a GW compact binary merger candidate",
"submitter": "Hop gcn.circular",
"authors": "Yi-Ru Chen at NTHU <eunice298123@gmail.com>",
"data": {
"date": "23/11/14 05:32:31 GMT",
"from": "Yi-Ru Chen at NTHU <eunice298123@gmail.com>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35023"
},
"title": "GCN CIRCULAR",
"number": "35023",
"subject": "LIGO/Virgo/KAGRA S231114n: Identification of a GW compact binary merger candidate"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:\n\nWe identified the compact binary merger candidate S231114n during real-time processing of data from LIGO Hanford Observatory (H1) and LIGO Livingston Observatory (L1) at 2023-11-14 04:32:11.255 UTC (GPS time: 1383971549.255). The candidate was found by the GstLAL [1], MBTA [2], PyCBC Live [3], and SPIIR [4] analysis pipelines.\n\nS231114n is an event of interest because its false alarm rate, as estimated by the online analysis, is 3.2e-10 Hz, or about one in 1e2 years. The event's properties can be found at this URL:\n\nhttps://gracedb.ligo.org/superevents/S231114n\n\nThe classification of the GW signal, in order of descending probability, is BBH (>99%), Terrestrial (<1%), BNS (<1%), or NSBH (<1%).\n\nAssuming the candidate is astrophysical in origin, the probability that the lighter compact object is consistent with a neutron star mass (HasNS) is <1%. [5] Using the masses and spins inferred from the signal, the probability of matter outside the final compact object (HasRemnant) is <1%. [5] Both HasNS and HasRemnant consider the support of several neutron star equations of state. The probability that either of the binary components lies between 3 and 5 solar masses (HasMassGap) is <1%.\n\nTwo sky maps are available at this time and can be retrieved from the GraceDB event page:\n * bayestar.multiorder.fits,1, an initial localization generated by BAYESTAR [6], distributed via GCN notice about 27 seconds after the candidate event time.\n * bayestar.multiorder.fits,2, an initial localization generated by BAYESTAR [6], distributed via GCN notice about 5 minutes after the candidate event time.\n\nThe preferred sky map at this time is bayestar.multiorder.fits,2. For the bayestar.multiorder.fits,2 sky map, the 90% credible region is 1508 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 1965 +/- 576 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] Tsukada et al. PRD 108, 043004 (2023) and Ewing et al. arXiv:2305.05625 (2023)\n [2] Aubin et al. CQG 38, 095004 (2021)\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\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35023.",
"published": "2023-11-14T05:32:41.111170Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-14T05:32:41.111189Z",
"modified": "2023-11-14T05:32:41.116755Z",
"nonlocalizedevents": [
{
"event_id": "S231114n"
}
],
"targets": []
},
{
"id": 4675,
"topic": "gcn.circular",
"uuid": "5548fdf5-cc61-4831-a8a2-d80550db5655",
"title": "LIGO/Virgo S231113bw: upper limits from AGILE/MCAL",
"submitter": "Hop gcn.circular",
"authors": "L. Foffano at INAF <luca.foffano@inaf.it>",
"data": {
"date": "23/11/14 13:13:59 GMT",
"from": "L. Foffano at INAF <luca.foffano@inaf.it>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35024"
},
"title": "GCN CIRCULAR",
"number": "35024",
"subject": "LIGO/Virgo S231113bw: upper limits from AGILE/MCAL"
},
"message_text": "L. Foffano (INAF/IAPS), F. Verrecchia (SSDC, and INAF/OAR), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), C. Casentini (INAF/IAPS), C. Pittori (SSDC, and INAF/OAR), M. Cardillo, G. Piano (INAF/IAPS), A. Ursi (ASI and INAF/IAPS), L. Baroncelli, A. Bulgarelli, A. Ciabattoni, A. Di Piano, V. Fioretti, G. Panebianco, N. Parmiggiani (INAF/OAS-Bologna), M. Pilia (INAF/OA-Cagliari), P.W. Cattaneo (INFN Pavia), F. Cutrona (Univ. Milano Bicocca), F. Longo (Univ. Trieste, and INFN Trieste), report on behalf of the AGILE Team:\n\nIn response to the LIGO/Virgo GW event S231113bw at T0 = 2023-11-13 20:04:17.06 (UT), a preliminary analysis of the AGILE minicalorimeter (MCAL) triggered data found no event candidates within a time interval covering -/+ 15 sec from the LIGO/Virgo T0.\n\nAt the T0, about 65% of the S231113bw 90% c.l. localization region was accessible to the AGILE MCAL.\n\nThree-sigma upper limits (ULs) are obtained for a 1 s integration time at different celestial positions within the accessible S231113bw localization region in the 0.4-1 MeV energy range, from a minimum of 1.3E-06 erg cm^-2 to a maximum of 7.3E-06 erg cm^-2 (assuming as spectral model a single power-law with photon index 1.5).\n\nAn independent procedure based on photon counting statistics provides UL fluences in the same band, for a 300 microseconds integration time, from a minimum of 1.0E-08 erg cm^-2 to a maximum of 4.4E-08 erg cm^-2.\n\nThe AGILE-MCAL detector is a CsI detector with a 4 pi FoV, sensitive in the energy range 0.4-100 MeV. Additional analysis of AGILE data is in progress.\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35024.",
"published": "2023-11-14T13:14:11.220010Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-14T13:14:11.220028Z",
"modified": "2023-11-14T13:14:11.227374Z",
"nonlocalizedevents": [
{
"event_id": "S231113b"
}
],
"targets": []
},
{
"id": 4676,
"topic": "gcn.circular",
"uuid": "c58acaf6-8581-4296-8ca3-1fa3b4e1fd57",
"title": "GRB 231114A: Fermi GBM Final Localization",
"submitter": "Hop gcn.circular",
"authors": "Andreas von Kienlin at MPE <azk@mpe.mpg.de>",
"data": {
"date": "23/11/14 13:16:58 GMT",
"from": "Andreas von Kienlin at MPE <azk@mpe.mpg.de>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35025"
},
"title": "GCN CIRCULAR",
"number": "35025",
"subject": "GRB 231114A: Fermi GBM Final Localization"
},
"message_text": "The Fermi GBM team reports the detection of a likely SHORT GRB\n\n\"At 09:18:40.39 UT on 14 November 2023, the Fermi Gamma-ray Burst Monitor\n(GBM)\ntriggered and located GRB 231114A (trigger 721646325/231114388).\n\nThe on-ground calculated location, using the Fermi GBM trigger data,\nis RA = 150.00, Dec = -36.55 (J2000 degrees, equivalent to J2000 10h 0m,\n-36d 32'),\nwith a statistical uncertainty of 11.38 degrees.\n\nThe angle from the Fermi LAT boresight is 77 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231114388/q\nuicklook/glg_skymap_all_bn231114388.png\n\nThe HEALPix FITS file, including the estimated localization systematic, can\nbe found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231114388/q\nuicklook/glg_healpix_all_bn231114388.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231114388/q\nuicklook/glg_lc_medres34_bn231114388.gif\"\n\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35025.",
"published": "2023-11-14T13:17:05.510045Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-14T13:17:05.510065Z",
"modified": "2023-11-14T13:17:05.515849Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4677,
"topic": "gcn.circular",
"uuid": "0eadaf28-db78-443e-a476-7b7fc4a673b2",
"title": "GECAM-B observation of a short burst from SGR J1555-5402",
"submitter": "Hop gcn.circular",
"authors": "wenlongzhang2018@163.com",
"data": {
"date": "23/11/14 15:24:46 GMT",
"from": "wenlongzhang2018@163.com",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35026"
},
"title": "GCN CIRCULAR",
"number": "35026",
"subject": "GECAM-B observation of a short burst from SGR J1555-5402"
},
"message_text": "Wen-Long Zhang, Shao-Lin Xiong, Yan-Ting Zhang, Chen-Wei Wang, Wang-Chen Xue, Ce Cai, Ping Wang, Yue Huang, Jin Wang report on behalf of the GECAM team:\n\nA short burst was triggered at 2023-11-11T21:35:11.400 UTC (T0) during the routine on-ground search of GECAM-B data, which was also detected by Swift/BAT (GCN #35022) and Fermi/GBM (trigger number 721431316).\n\nAccording to the GECAM-B light curve in about 40-300 keV, this burst mainly consists of a short pulse with duration of about 25 ms.\n\nThe time-integrated spectrum of GECAM-B data from T0-0.05 s to T0+0.05 s can be fitted by the blackbody function, with the best fit parameters kT = 17.3 +/- 2.3 keV. The energy fluence is about 5.9E-8 erg/cm^2 in 40-300 keV.\n\nGECAM-B localized this burst to the following position (J2000):\nRa: 235 deg\nDec: -45 deg\nErr: 5 deg (1-sigma, statistical only)\nThis GECAM-B localization is consistent with SGR J1555-5402 within the error, which is confirmed by the Swift/BAT-GUANO arcminute localization (GCN #35022).\n\nPlease note that all GECAM results here are preliminary. The final analysis will be reported.\n\nGravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) mission originally consists of two microsatellites (GECAM-A and GECAM-B) launched in Dec. 2020. As the third member of GECAM constellation, GECAM-C was launched onboard SATech-01 experimental satellite in July 2022. GECAM mission is funded by the Chinese Academy of Sciences (CAS).\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35026.",
"published": "2023-11-14T15:24:59.654892Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-14T15:24:59.654923Z",
"modified": "2023-11-14T15:24:59.661652Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4678,
"topic": "gcn.circular",
"uuid": "7cb274c5-4fcd-4569-b56d-7fe212e969fb",
"title": "LIGO/Virgo/KAGRA S231113bw: GROWTH-India coverage and upper limits",
"submitter": "Hop gcn.circular",
"authors": "Anirudh Salgundi <salgundi.anirudh@gmail.com>",
"data": {
"date": "23/11/14 16:38:00 GMT",
"from": "Anirudh Salgundi <salgundi.anirudh@gmail.com>",
"urls": {
"gcn": "https://gcn.nasa.gov/circulars/35027"
},
"title": "GCN CIRCULAR",
"number": "35027",
"subject": "LIGO/Virgo/KAGRA S231113bw: GROWTH-India coverage and upper limits"
},
"message_text": "R. Kumar, A. Salgundi, R. Sharma, G. Waratkar, A. Suresh, Y. Wagh, A. Arya, V. Swain, D. Raman, T. Roychowdhury, V. Bhalerao (IIT Bombay), S. Barway, G. C. Anupama (IIA), R. Norboo (IAO)\n\nWe followed up the sky localisation of the gravitational wave trigger S231113bw (GCN 35016) with the 0.7m GROWTH-India Telescope (GIT). We obtained multiple 300-sec exposures in the r' filter starting at 2023-11-13T20:38:43.52 UT, 34.4 minutes after the LVK trigger. We prioritised our observations based on galaxies in the localisation region, using the NASA/IPAC Extragalactic Database (NED, Cook et al., 2023). We obtained 39 images covering 18 sq deg, with a median depth of 20.27. Based on the \"bayestar.multiorder.fits,2\" skymap our images have a 1.23% probability of containing the true source.\n\nData were processed using the GIT pipeline (Kumar et al., 2022). The pipeline performed image subtraction with the ZOGY (Zackay et al., 2016) algorithm, and resultant images were scanned to find transients. Where available, PanSTARRS images (Chambers et al., 2016) were used as references for image subtraction. In other fields (marked with ^), we looked for new point sources absent in the GSC2.3 catalog (Lasker et al., 2008). We rejected a few candidates that were coincident with field stars and minor planets. We did not find any suitable kilonova or transient candidate in our data.\n\nThe detailed observation log is:\n\n| Tile ID | RA (deg) | Dec (deg) | Lim Mag (AB) |\n\n| 4573 | 77.062 | -25.51 | 20.44 |\n| 1410 | 81.537 | -30.41 | 20.27 |\n| 1854 | 81.796 | -29.71 | 20.24 |\n| 530 | 80.178 | -31.81 | 19.94 |\n| 62104 | 255.824 | 69.00 | 19.28 |\n| 9803 | 69.433 | -17.81 | 20.94 |\n| 6915 | 73.605 | -22.01 | 20.04 |\n| 4115 | 79.910 | -26.21 | 20.27 |\n| 2298 | 79.639 | -29.01 | 20.34 |\n| 2745 | 77.514 | -28.31 | 20.51 |\n| 5502 | 75.469 | -24.11 | 20.26 |\n| 3653 | 77.286 | -26.91 | 20.72 |\n| 2753 | 83.903 | -28.31 | 19.99 |\n| 60221 | 246.237 | 62.70 | 19.86 |\n| 5038 | 77.506 | -24.81 | 20.74 |\n| 60678 | 245.466 | 64.10 | 19.55 |\n| 16286 | 65.409 | -8.71 | 19.62 |\n| 5035 | 75.184 | -24.81 | 20.74 |\n| 10293 | 69.880 | -17.11 | 20.41 |\n| 13264 | 67.764 | -12.91 | 19.39 |\n| 6441 | 73.911 | -22.71 | 20.53 |\n| 969 | 81.274 | -31.11 | 19.91 |\n| 2746 | 78.311 | -28.31 | 20.51 |\n| 22422 | 62.539 | -0.31 | 20.08 |\n| 4112 | 77.563 | -26.21 | 20.37 |\n| 1413 | 83.979 | -30.41 | 20.40 |\n| 7871 | 73.588 | -20.61 | 20.79 |\n| 968 | 80.453 | -31.11 | 20.09 |\n| 8832 | 70.746 | -19.21 | 20.67 |\n| 63242 | 270.732 | 73.90 | 18.59 |\n| 6442 | 74.673 | -22.71 | 20.66 |\n| 63241^ | 268.179 | 73.91 | 18.63 |\n| 4113 | 78.348 | -26.21 | 20.70 |\n| 15273 | 65.673 | -10.11 | 21.00 |\n| 4570 | 74.729 | -25.51 | 20.53 |\n| 16795 | 65.989 | -8.01 | 19.81 |\n| 63404 | 336.108 | 74.60 | 20.18 |\n| 61723^ | 248.747 | 67.60 | 19.36 |\n| 10296 | 72.084 | -17.11 | 19.54 |\n\n\nThe magnitudes are calibrated against PanSTARRS DR1 (Chambers et al., 2016) and not corrected for Galactic extinction.\n\nThe GROWTH India Telescope (GIT; Kumar et al., 2022) is a 70-cm telescope with a 0.7-degree field of view, set up by the Indian Institute of Astrophysics (IIA) and the Indian Institute of Technology Bombay (IITB) with funding from DST-SERB and IUSSTF. It is located at the Indian Astronomical Observatory (Hanle), operated by IIA. We acknowledge funding by the IITB alumni batch of 1994, which partially supports the operations of the telescope. Telescope technical details are available at https://sites.google.com/view/growthindia/.\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35027.",
"published": "2023-11-14T16:38:11.743255Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-14T16:38:11.743275Z",
"modified": "2023-11-14T16:38:11.750609Z",
"nonlocalizedevents": [
{
"event_id": "S231113b"
}
],
"targets": []
},
{
"id": 6682,
"topic": "gcn.circular",
"uuid": "62fdbfb6-d326-417b-b7bf-104e405a1518",
"title": "GRB240418A: YAHPT Upper Limits",
"submitter": "Hop gcn.circular",
"authors": "Tianrui Sun at Purple Mountain Obs,CAS <trsun@pmo.ac.cn>",
"data": {
"date": "24/04/19 11:15:10 GMT",
"from": "Tianrui Sun at Purple Mountain Obs,CAS <trsun@pmo.ac.cn>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/36177"
},
"title": "GCN CIRCULAR",
"number": "36177",
"subject": "GRB240418A: YAHPT Upper Limits"
},
"message_text": "Tian-Rui Sun, Jin-Jun Geng, Jian Chen, Yan-Long Hua and Lei Hu report on behalf of the YAHPT team:\n\nFollowing the detection of GRB 240418A by SWIFT (Siegel et al., GCN 36162; Evans et al., GCN 36166),\nwe use the Yaoan High Precision Telescope at Yaoan Astronomy Observation Station (Yunnan province, China) to search and follow up its afterglow at XRT position.\n\nWe observed the target position with 180s exposure in V-band starting from 2024-04-18T20:32:14.600 about 486.6 seconds after the burst.\nWe took 25 images with total exposure time of 4500 seconds from 20:32:14 to 21:48:29.4.\nWe did not detect any object up to V = 22.2 with the stacked images within the Enhanced Swift XRT position\nThis non-detection results of the gamma-ray bursts is in agreement with the previous circulars\n(Lipunov et al., GCN 36163; Odeh et al., GCN 36165; Malesani et al., GCN 36167; Pozanenko et al. GCN 36168;).\n\nWe used the UCAC4 catalog (Vmag) as the magnitude reference for calibration.\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/36177.",
"published": "2024-04-19T11:15:28.468952Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2024-04-19T11:15:28.468965Z",
"modified": "2024-04-19T11:15:28.474853Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4683,
"topic": "gcn.circular",
"uuid": "256f24d3-c499-495b-bbe1-95fe384691d8",
"title": "LIGO/Virgo/KAGRA S231114n: Updated Sky localization",
"submitter": "Hop gcn.circular",
"authors": "Charlie Hoy at University of Portsmouth <charlie.hoy@port.ac.uk>",
"data": {
"date": "23/11/14 23:03:41 GMT",
"from": "Charlie Hoy at University of Portsmouth <charlie.hoy@port.ac.uk>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/35031"
},
"title": "GCN CIRCULAR",
"number": "35031",
"subject": "LIGO/Virgo/KAGRA S231114n: 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 S231114n (GCN Circular 35023). 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/S231114n\n\nFor the Bilby.multiorder.fits,0 sky map, the 90% credible region is 1267 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 1317 +/- 407 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) and Morisaki et al. arXiv:2307.13380 (2023)\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35031.",
"published": "2023-11-14T23:03:51.720773Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-14T23:03:51.720794Z",
"modified": "2023-11-14T23:03:51.727149Z",
"nonlocalizedevents": [
{
"event_id": "S231114n"
}
],
"targets": []
},
{
"id": 4684,
"topic": "gcn.circular",
"uuid": "804aa999-1259-444a-a463-a79d29d6a744",
"title": "LIGO/Virgo/KAGRA S231113bw: Zwicky Transient Facility observations",
"submitter": "Hop gcn.circular",
"authors": "Tomas Ahumada Mena at Caltech <tahumada@caltech.edu>",
"data": {
"date": "23/11/14 23:35:36 GMT",
"from": "Tomas Ahumada Mena at Caltech <tahumada@caltech.edu>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/35032"
},
"title": "GCN CIRCULAR",
"number": "35032",
"subject": "LIGO/Virgo/KAGRA S231113bw: Zwicky Transient Facility observations"
},
"message_text": "Tomas Ahumada (CIT), Anirudh Salgundi (IITB), Robert Stein (CIT), Viraj Karambelkar (CIT), Gaurav Waratkar (IITB), Vishwajeet Swain (IITB), Theophile du Laz (CIT), Igor Andreoni (SURA), Michael Coughlin (UMN), Mansi Kasliwal (CIT), Varun Bhalerao (IITB), Simeon Reusch (DESY), Jannis Necker (DESY), Shreya Anand (CIT), Eric Bellm (UW), S.B. Cenko (UMD), D. Perley (LJMU), D. Kaplan (UWM) report on behalf of the ZTF and GROWTH collaborations:\n\n\nWe observed the localization region of LVC trigger S231113bw (GCN 35016) as part of routine Zwicky Transient Facility (ZTF; Graham et al., 2019; Bellm et al., 2019) survey operations. We obtained images in the g, r, and i bands beginning at 2023-11-14T03:50:13 (7.7 hours after the burst trigger time). The observations covered 9.2% of the probability enclosed in the localization region.\n\nWe queried the ZTF alert stream using Kowalski (Duev et al. 2019) through Fritz (Coughlin et al. 2023) and emgwcave (Karambelkar et al. in prep), AMPEL (Nordin et al. 2019), and ZTFReST (Andreoni & Coughlin et al., 2021). We required at least 2 detections separated by at least 15 minutes to select against moving objects. Furthermore, we cross-match our candidates with the Minor Planet Center to flag known asteroids, reject stellar sources (Tachibana and Miller 2018), and apply machine learning algorithms (Mahabal et al. 2019). We require that no spatially coincident ZTF alerts were issued before the detection time of the LVC trigger. We also run forced photometry on ZTF images (Masci et al. 2019) and ATLAS images (Tonry et al. 2018, Smith et al. 2020) and require no detections before the LVC trigger.\n\nWe do not identify any sources that pass our selection criteria.\n\nFurther follow-up of this localization region will continue as part of regular survey operations.\n\n\nZTF and GROWTH are worldwide collaborations comprising Caltech, USA; IPAC, USA; WIS, Israel; OKC, Sweden; JSI/UMd, USA; U Washington, USA; DESY, Germany; MOST, Taiwan; UW Milwaukee, USA; LANL USA; Tokyo Tech, Japan; IITB, India; IIA, India; LJMU, UK; TTU, USA; SDSU, USA and USyd, Australia. ZTF acknowledges the generous support of the NSF under AST MSIP Grant No 1440341. GROWTH acknowledges generous support of the NSF under PIRE Grant No 1545949. Alert distribution service provided by DIRAC@UW (Patterson et al. 2019). Alert database searches are done by AMPEL (Nordin et al. 2019) and Kowalski (Duev et al. 2019). GROWTH India telescope is located at the Indian Astronomical Observatory (Hanle), operated by the Indian Institute of Astrophysics (IIA). GROWTH-India project is supported by SERB and administered by IUSSTF, under grant number IUSSTF/PIRE Program/GROWTH/2015-16 and IUCAA.\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35032.",
"published": "2023-11-14T23:35:47.210138Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-14T23:35:47.210164Z",
"modified": "2023-11-14T23:35:47.219030Z",
"nonlocalizedevents": [
{
"event_id": "S231113b"
}
],
"targets": []
},
{
"id": 4691,
"topic": "gcn.circular",
"uuid": "b4a80e53-eb23-4010-9c70-3253b11cee02",
"title": "GRB 231115A: significance of INTEGRAL localization alignment with M82",
"submitter": "Hop gcn.circular",
"authors": "Eric Burns at LSU <erickayserburns@gmail.com>",
"data": {
"date": "23/11/15 17:29:21 GMT",
"from": "Eric Burns at LSU <erickayserburns@gmail.com>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/35038"
},
"title": "GCN CIRCULAR",
"number": "35038",
"subject": "GRB 231115A: significance of INTEGRAL localization alignment with M82"
},
"message_text": "Eric Burns (LSU)\n\nINTEGRAL has localized the GRB 231115A to be coincident with the nearby, star-forming galaxy M82, suggesting a possible giant flare origin (S.Mereghetti et al., GCN 35037). Using the method in [1] we estimate the Bayes factor that this is a giant flare from M82 vs neutron star merger GRB with a chance alignment to be approximately 180,000 to 1. The corresponding value for GRB 200415A, the previous most confident event is 6,000 to 1. The false alarm rate for GRB 231115A is beyond 4.5 sigma in Gaussian-equivalent significance. This is a lower bound as the necessary background simulations for more confident constraints will take weeks to run. We report this to support additional follow-up\n\nWe emphasize this is a very preliminary significance estimate, using code which had to be quickly modified and updated to handle Python package updates that occurred since it was last used, and it has not been checked carefully.\n\n[1] E Burns et al., ApjL 907 2 2021\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35038.",
"published": "2023-11-15T17:29:34.715313Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-15T17:29:34.715350Z",
"modified": "2023-11-15T17:29:34.722988Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4692,
"topic": "gcn.circular",
"uuid": "df850e3b-3e2f-403d-aa2f-774f9fb18607",
"title": "Fermi GRB 231115A: 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": "23/11/15 17:30:44 GMT",
"from": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/35039"
},
"title": "GCN CIRCULAR",
"number": "35039",
"subject": "Fermi GRB 231115A: Global MASTER-Net observations report"
},
"message_text": "V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko,\nG.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley\n(South African Astronomical Observatory),\n\nO.A. Gress, N.M. Budnev, O.Ershova\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,\nA.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nV. Yurkov, A. Gabovich\n(Blagoveschensk Educational State University)\n\nMASTER-Tunka robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the Fermi GRB 231115A ( Fermi GBM team, GCN 35035) errorbox 4601 sec after notice time and 4635 sec after trigger time at 2023-11-15 16:53:37 UT, with upper limit up to 18.8 mag. The observations began at zenith distance = 47 deg. The sun altitude is -57.5 deg.\n\nThe galactic latitude b = 34 deg., longitude l = 141 deg.\n\n\nReal time updated cover map and OT discovered available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id#06520\n\nWe obtain a following upper limits.\n\nTmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n 4726 | 2023-11-15 16:53:37 | MASTER-Tunka | (09h 52m 05.00s , +66d 57m 09.9s) | C | 180 | 14.1 |\n 4726 | 2023-11-15 16:53:37 | MASTER-Tunka | (09h 53m 24.26s , +67d 39m 25.7s) | C | 180 | 18.8 |\n 4890 | 2023-11-15 16:57:06 | MASTER-Tunka | (09h 52m 11.37s , +66d 56m 35.9s) | C | 90 | 15.5 |\n 4890 | 2023-11-15 16:57:06 | MASTER-Tunka | (09h 53m 31.95s , +67d 38m 26.3s) | C | 90 | 18.1 |\n 5007 | 2023-11-15 16:59:02 | MASTER-Tunka | (09h 52m 07.51s , +66d 55m 13.1s) | C | 90 | 13.3 |\n 5007 | 2023-11-15 16:59:03 | MASTER-Tunka | (09h 53m 26.66s , +67d 37m 26.5s) | C | 90 | 18.0 |\n 5124 | 2023-11-15 17:01:00 | MASTER-Tunka | (09h 52m 12.62s , +66d 55m 43.4s) | C | 90 | 15.3 |\n 5124 | 2023-11-15 17:01:00 | MASTER-Tunka | (09h 53m 33.01s , +67d 37m 31.8s) | C | 90 | 18.0 |\n 5242 | 2023-11-15 17:02:58 | MASTER-Tunka | (09h 52m 11.14s , +66d 57m 23.6s) | C | 90 | 15.4 |\n 5242 | 2023-11-15 17:02:58 | MASTER-Tunka | (09h 53m 31.53s , +67d 39m 11.8s) | C | 90 | 17.9 |\n 5356 | 2023-11-15 17:04:52 | MASTER-Tunka | (09h 53m 32.24s , +67d 37m 28.1s) | C | 90 | 17.6 |\n 5475 | 2023-11-15 17:06:50 | MASTER-Tunka | (09h 52m 15.59s , +66d 57m 34.6s) | C | 90 | 15.3 |\n 5475 | 2023-11-15 17:06:51 | MASTER-Tunka | (09h 53m 35.65s , +67d 39m 20.1s) | C | 90 | 17.6 |\n 5593 | 2023-11-15 17:08:49 | MASTER-Tunka | (09h 52m 10.80s , +66d 56m 43.7s) | C | 90 | 15.1 |\n 5593 | 2023-11-15 17:08:49 | MASTER-Tunka | (09h 53m 30.64s , +67d 38m 28.1s) | C | 90 | 17.7 |\n 5710 | 2023-11-15 17:10:46 | MASTER-Tunka | (09h 52m 11.18s , +66d 57m 44.6s) | C | 90 | 15.0 |\n 5710 | 2023-11-15 17:10:46 | MASTER-Tunka | (09h 53m 30.87s , +67d 39m 28.0s) | C | 90 | 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\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35039.",
"published": "2023-11-15T17:30:54.820478Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-15T17:30:54.820498Z",
"modified": "2023-11-15T17:30:54.828729Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4685,
"topic": "gcn.circular",
"uuid": "33a5f48f-667c-4099-993b-409d674f7ba0",
"title": "GRB 231111A: Swift-BAT refined analysis",
"submitter": "Hop gcn.circular",
"authors": "Mike Moss at NASA GSFC <mikejmoss3@gmail.com>",
"data": {
"date": "23/11/15 00:21:53 GMT",
"from": "Mike Moss at NASA GSFC <mikejmoss3@gmail.com>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/35033"
},
"title": "GCN CIRCULAR",
"number": "35033",
"subject": "GRB 231111A: Swift-BAT refined analysis"
},
"message_text": "A. Y. Lien (U Tampa), S. D. Barthelmy (GSFC),\nH. A. Krimm (NSF), S. Laha (GSFC/UMBC),\nC. B. Markwardt (GSFC), A. Melandri (INAF-OAR),\nM. J. Moss (GSFC), D. M. Palmer (LANL),\nT. Parsotan (GSFC/UMBC), T. Sakamoto (AGU),\nM. Stamatikos (OSU) (i.e. the Swift-BAT team):\n\nUsing the data set from T-239 to T+200 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 231111A (trigger #1195887)\n(Melandri, et al., GCN Circ. 34981). The BAT ground-calculated position is\nRA, Dec = 290.197, 52.440 deg which is\n RA(J2000) = 19h 20m 47.3s\n Dec(J2000) = +52d 26' 22.9\"\nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 61%.\n\nThe BAT light curve shows a FRED-pulse structure peaking ~0 seconds after the trigger time.\nT90 (15-350 keV) is 34.08 +- 4.88 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-5.32 to T+40.06 sec is best fit by a simple\npower-law model. The power law index of the time-averaged spectrum is\n1.58 +- 0.07. The fluence in the 15-150 keV band is 3.4 +- 0.1 x 10^-06 erg/cm2.\nThe 1-sec peak photon flux measured from T+0.07 sec in the 15-150 keV band\nis 2.7 +- 0.3 ph/cm2/sec. All the quoted errors are at the 90% confidence\nlevel.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/1195887/BA/\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35033.",
"published": "2023-11-15T00:22:03.862755Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-15T00:22:03.862774Z",
"modified": "2023-11-15T00:22:03.870465Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4687,
"topic": "gcn.circular",
"uuid": "e000533f-abde-47a9-9cf8-1a4ddfbdb7f6",
"title": "LIGO/Virgo/KAGRA S231113bw: Updated Sky localization, EM Bright Classification, and Source Classification",
"submitter": "Hop gcn.circular",
"authors": "jgolomb@caltech.edu",
"data": {
"date": "23/11/15 01:32:36 GMT",
"from": "jgolomb@caltech.edu",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/35034"
},
"title": "GCN CIRCULAR",
"number": "35034",
"subject": "LIGO/Virgo/KAGRA S231113bw: Updated Sky localization, EM Bright Classification, and Source Classification"
},
"message_text": "The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:\n\nWe have conducted further analysis of the LIGO Hanford Observatory (H1) and LIGO Livingston Observatory (L1) data around the time of the compact binary merger (CBC) candidate S231113bw (GCN Circular 35016). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.multiorder.fits, distributed via GCN Notice, is available for retrieval from the GraceDB event page:\n\nhttps://gracedb.ligo.org/superevents/S231113bw\n\nBased on posterior support from parameter estimation [1], under the assumption that the candidate S231113bw is astrophysical in origin, the probability that the lighter compact object is consistent with a neutron star mass (HasNS) is <1%. [2] Using the masses and spins inferred from the signal, the probability of matter outside the final compact object (HasRemnant) is <1%. [2] Both HasNS and HasRemnant consider the support of several neutron star equations of state. The probability that either of the binary components lies between 3 and 5 solar masses (HasMassgap) is 2%.\n\nAfter parameter estimation by RapidPE-RIFT [3], the updated classification of the GW signal, in order of descending probability, is BBH (96%), Terrestrial (4%), NSBH (<1%), or BNS (<1%).\n\nFor the Bilby.multiorder.fits sky map, the 90% credible region is 1713 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 1186 +/- 376 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) and Morisaki et al. arXiv:2307.13380 (2023)\n [2] Chatterjee et al. ApJ 896, 54 (2020)\n [3] Rose et al. arXiv:2201.05263 (2022) and Pankow et al. PRD 92, 023002 (2015)\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35034.",
"published": "2023-11-15T01:32:47.505228Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-15T01:32:47.505249Z",
"modified": "2023-11-15T01:32:47.512054Z",
"nonlocalizedevents": [
{
"event_id": "S231113b"
}
],
"targets": []
},
{
"id": 4688,
"topic": "gcn.circular",
"uuid": "4c0a6845-52c0-4a76-a400-352cc985681a",
"title": "GRB 231115A: 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": "23/11/15 15:46:53 GMT",
"from": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/35035"
},
"title": "GCN CIRCULAR",
"number": "35035",
"subject": "GRB 231115A: Fermi GBM Final Real-time Localization"
},
"message_text": "The Fermi GBM team reports the detection of a likely SHORT GRB\n\nAt 15:36:21 UT on 15 Nov 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231115A (trigger 721755386.20138 / 231115650).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 131.0, Dec = 73.5 (J2000 degrees, equivalent to J2000 08h 43m, 73d 30'), with a statistical uncertainty of 8.7 degrees.\n\nThe angle from the Fermi LAT boresight is 38.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231115650/quicklook/glg_skymap_all_bn231115650.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/bn231115650/quicklook/glg_healpix_all_bn231115650.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231115650/quicklook/glg_lc_medres34_bn231115650.gif\n\n\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35035.",
"published": "2023-11-15T15:47:11.528300Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-15T15:47:11.528333Z",
"modified": "2023-11-15T15:47:11.537973Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4689,
"topic": "gcn.circular",
"uuid": "560f8c2b-fbb2-463b-a81c-ad9733f55663",
"title": "GRB 231115A position consistent with M 82 galaxy",
"submitter": "Hop gcn.circular",
"authors": "Paolo D'Avanzo at INAF-OAB <pda.davanzo@gmail.com>",
"data": {
"date": "23/11/15 16:25:31 GMT",
"from": "Paolo D'Avanzo at INAF-OAB <pda.davanzo@gmail.com>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/35036"
},
"title": "GCN CIRCULAR",
"number": "35036",
"subject": "GRB 231115A position consistent with M 82 galaxy"
},
"message_text": "P. DâAvanzo (INAF - OAB), E. Palazzi (INAF - OAS), S. Campana (INAF - OAB), M. G. Bernardini (INAF - OAB), D. B. Malesani (DAWN/NBI & Radboud Univ.) \non behalf of the CIBO collaboratio report:\n\n\nGRB 231115A has been recently detected by Fermi/GBM (Fermi GBM team, GCN Circ. 35035) and INTEGRAL (https://gcn.gsfc.nasa.gov/other/10427.integral <https://gcn.gsfc.nasa.gov/other/10427.integral>). \n\nWe note that the INTEGRAL position (which has an uncertainty radius or 3 arcmin) is consistent with the position of the M 82 galaxy (luminosity distance of ~ 3.5 Mpc). \n\nFollow-up observations are encouraged. \n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35036.",
"published": "2023-11-15T16:25:42.419604Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-15T16:25:42.419623Z",
"modified": "2023-11-15T16:25:42.426779Z",
"nonlocalizedevents": [],
"targets": []
},
{
"id": 4690,
"topic": "gcn.circular",
"uuid": "f8903e69-7385-4c04-bdba-7f326fb085ae",
"title": "GRB 231115A: a short hard GRB detected by IBAS, poistionally coincident with M82",
"submitter": "Hop gcn.circular",
"authors": "Diego Gotz at CEA <diego.gotz@cea.fr>",
"data": {
"date": "23/11/15 16:26:24 GMT",
"from": "Diego Gotz at CEA <diego.gotz@cea.fr>",
"urls": {
"gcn_circular": "https://gcn.nasa.gov/circulars/35037"
},
"title": "GCN CIRCULAR",
"number": "35037",
"subject": "GRB 231115A: a short hard GRB detected by IBAS, poistionally coincident with M82"
},
"message_text": "S.Mereghetti (INAF, IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno, E.Bozzo, V.Savchenko (ISDC, Versoix), L.Ducci (IAAT, Germany and ISDC, Versoix) and J.Borkowski (CAMK, Torun) report:\n\na short hard burst lasting about 150 ms has been detected by IBAS in the IBIS/ISGRI data at 15:36:22 UT of November 15, 2023.\n\nThe refined coordinates (J2000) are:\nR.A.= 149.000901 [degrees]\nDEC.= 69.680130 [degrees]\nwith an uncertainty of 2 arcmin (90% c.l.).\n\nWe note that this position is consistent with the galaxy M82, so this event, which also triggered Fermi/GBM, may be due to a magnetar giant flare or to a nearby merger. So we encourage follow-up at other wavelengths.\n\nA plot of the light curve will be posted at\nhttp://ibas.iasf-milano.inaf.it/IBAS_Results.html\n\n\nView this GCN Circular online at https://gcn.nasa.gov/circulars/35037.",
"published": "2023-11-15T16:26:30.491146Z",
"message_parser": "GCN Circular Parser v1",
"retracted": false,
"created": "2023-11-15T16:26:30.491179Z",
"modified": "2023-11-15T16:26:30.497352Z",
"nonlocalizedevents": [],
"targets": []
}
]
}
