March 2025 - vsnet-grb-info - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-grb-info 37988] GRB20250327B: 45th Parallel Observatory upper limit
by GCN Circulars 31 Mar '25

31 Mar '25

TITLE: GCN CIRCULAR NUMBER: 39969 SUBJECT: GRB20250327B: 45th Parallel Observatory upper limit DATE: 25/03/31 12:21:20 GMT FROM: Vincenzo Della Vecchia <v.dellavecchia(a)uai.it> Vincenzo della Vecchia (45th Parallel Observatory, Italy) Member of: AAVSO - American Association of Variable Star Observers UAI - Unione Astrofili Italiani - Gamma Ray Burst Section In a large collaboration with: M.G. Dainotti (National Astronomical Observatory of Japan), Y. Niino (Tokyo University, … [View More]

1 0

[vsnet-grb-info 37987] GRB 250328A: Swift/UVOT Detection
by GCN Circulars 31 Mar '25

31 Mar '25

TITLE: GCN CIRCULAR NUMBER: 39968 SUBJECT: GRB 250328A: Swift/UVOT Detection DATE: 25/03/31 10:23:48 GMT FROM: noelklin(a)umbc.edu N. Klingler (NASA-GSFC / UMBC / CRESST II), M.H. Siegel (PSU), and P.A. Evans (U. Leicester), report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 250328A 3254 s after the SVOM trigger sb25032803 (GCN Circ. 39910). A source consistent with the XRT position (Evans et al., GCN Circ. 39967) is detected in … [View More]

1 0

[vsnet-grb-info 37986] GRB 250328A: Swift-XRT refined Analysis
by GCN Circulars 31 Mar '25

31 Mar '25

TITLE: GCN CIRCULAR NUMBER: 39967 SUBJECT: GRB 250328A: Swift-XRT refined Analysis DATE: 25/03/31 09:33:00 GMT FROM: Phil Evans at U of Leicester <pae9(a)star.le.ac.uk> J.P. Osborne (U. Leicester), A. D'Ai (INAF-IASFPA), A. Melandri (INAF-OAR), T. Sbarrato (INAF-OAB), M. A. Williams (PSU), S. Dichiara (PSU), J.A. Kennea (PSU), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester) and P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team: We have analysed 4.5 ks of … [View More]

1 0

[vsnet-grb-info 37985] Fermi-LAT gamma-ray observations of IceCube-250330A
by GCN Circulars 31 Mar '25

31 Mar '25

TITLE: GCN CIRCULAR NUMBER: 39966 SUBJECT: Fermi-LAT gamma-ray observations of IceCube-250330A DATE: 25/03/31 07:12:49 GMT FROM: Leo Pfeiffer at University of Würzburg <pfeiffer.leo(a)gmail.com> L. Pfeiffer (Univ. of Wuerzburg), S. Buson (DESY, Univ. of Wuerzburg), C. Bartolini (INFN Bari), S. Garrappa (Weizmann Institute of Science) on behalf of the Fermi-LAT collaboration: We report an analysis of observations of the vicinity of the high-energy IC250330A neutrino event (GCN … [View More]

1 0

[vsnet-grb-info 37984] SVOM/sb25033102 is a false trigger
by GCN Circulars 31 Mar '25

31 Mar '25

TITLE: GCN CIRCULAR NUMBER: 39965 SUBJECT: SVOM/sb25033102 is a false trigger DATE: 25/03/31 07:00:53 GMT FROM: SVOM_group <svomgroup(a)bao.ac.cn> Yinuo MA, Chao WU, Donghua ZHAO, Wenjin XIE (NAOC), Hatsune GOTO (CEA, Kanazawa Univ) on behalf of the SVOM mission team. The SVOM trigger sb25033102 (GCN Circular 39955) on 2025-03-31T02:04:18 UTC (Tb) is a false trigger, caused by the nearby known bright source SCO X-1, and does not correspond to a real transient. We apologize for … [View More]

1 0

[vsnet-grb-info 37983] GRB 250330A: Fermi GBM Observation
by GCN Circulars 31 Mar '25

31 Mar '25

TITLE: GCN CIRCULAR NUMBER: 39964 SUBJECT: GRB 250330A: Fermi GBM Observation DATE: 25/03/31 06:48:11 GMT FROM: Utkarsh Pathak at IIT Bombay <utkarshpathak.07(a)gmail.com> U. Pathak (IITB), R. Sonawane (IISER, TVM) and C. Meegan (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team: "At 06:07:38.42 UT on 30 March 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250330A (trigger 765007663/250330255). which was also detected by Swift-BAT (Cenko … [View More]

1 0

[vsnet-grb-info 37982] GRB 250331C: COLIBRÍ/DDRAGO optical upper limit
by GCN Circulars 31 Mar '25

31 Mar '25

TITLE: GCN CIRCULAR NUMBER: 39963 SUBJECT: GRB 250331C: COLIBRÍ/DDRAGO optical upper limit DATE: 25/03/31 06:24:32 GMT FROM: damien dornic <damiendornic(a)gmail.com> Damien Dornic (CPPM), Margarita Pereyra (UNAM), Jean-Grégoire Ducoin (CPPM), Jean-Luc Atteia (IRAP), Stéphane Basa (UAR Pytheas), William H. Lee (UNAM), Dalya Akl (AUS), Camila Angulo (UNAM), Sarah Antier (OCA), Rosa L. Becerra (U Roma), Nathaniel R. Butler (ASU), Francis Fortin (IRAP), Ny Avo Rakotondrainibe (LAM), … [View More]

1 0

[vsnet-grb-info 37981] GRB 250331B: COLIBRÍ/DDRAGO optical upper limit
by GCN Circulars 31 Mar '25

31 Mar '25

TITLE: GCN CIRCULAR NUMBER: 39962 SUBJECT: GRB 250331B: COLIBRÍ/DDRAGO optical upper limit DATE: 25/03/31 06:21:34 GMT FROM: damien dornic <damiendornic(a)gmail.com> Damien Dornic (CPPM), Margarita Pereyra (UNAM), Jean-Grégoire Ducoin (CPPM), Jean-Luc Atteia (IRAP), Stéphane Basa (UAR Pytheas), William H. Lee (UNAM), Dalya Akl (AUS), Camila Angulo (UNAM), Sarah Antier (OCA), Rosa L. Becerra (U Roma), Nathaniel R. Butler (ASU), Francis Fortin (IRAP), Ny Avo Rakotondrainibe (LAM), … [View More]

1 0

[vsnet-grb-info 37980] GRB 250331D: Fermi GBM Final Real-time Localization
by GCN Circulars 31 Mar '25

31 Mar '25

TITLE: GCN CIRCULAR NUMBER: 39961 SUBJECT: GRB 250331D: Fermi GBM Final Real-time Localization DATE: 25/03/31 05:59:53 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply(a)GIOC.nsstc.nasa.gov> The Fermi GBM team reports the detection of a likely LONG GRB At 05:49:17 UT on 31 Mar 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250331D (trigger 765092962.014718 / 250331243). The on-ground calculated location, using the Fermi GBM trigger data, is RA =… [View More]

1 0

[vsnet-grb-info 37979] GRB 250331C: Prompt enhanced Swift-XRT position
by GCN Circulars 31 Mar '25

31 Mar '25

TITLE: GCN CIRCULAR NUMBER: 39960 SUBJECT: GRB 250331C: Prompt enhanced Swift-XRT position DATE: 25/03/31 05:45:04 GMT FROM: Phil Evans at U of Leicester <pae9(a)star.le.ac.uk> P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team: Using 1.6 ks of promptly downlinked XRT event data for GRB 250331C, we find an enhanced XRT position of the afterglow: RA, Dec: 80.95640, 33.06317 which is equivalent to: RA (J2000) = 05 23 49.54 Dec (J2000) = +33 03 47.4 with an … [View More]

1 0

2025

2024

2023

2022

2021

vsnet-grb-info March 2025