GCN Circular 37495
Subject
GRB 240914A : An intermediate duration GRB located on-board by SVOM/ECLAIRs.
Date
2024-09-14T07:31:46Z (3 months ago)
From
Jean-Luc Atteia at IRAP <jean-luc.atteia@irap.omp.eu>
Via
Web form
SVOM/ECLAIRs commissioning team: Alexis Coleiro (APC), Stéphane Schanne, Frédéric Chateau, Nicolas Dagoneau, Hervé Le Provost (CEA), Olivier Godet, Laurent Bouchet, Sebastien Guillot, Juliette Alaux (IRAP), Tais Maiolino (LUPM), Karine Mercier, Marie-Claire Charmeau, Stefano Crepaldi (CNES)
SVOM JSWG: Jian-Yan Wei (NAOC), Bertrand Cordier (CEA), Shuang-Nan Zhang (IHEP), Stéphane Basa (LAM), Jean-Luc Atteia (IRAP), Arnaud Claret (CEA), Zi-Gao Dai (USTC), Frédéric Daigne (IAP), Jin-Song Deng (NAOC), Andrea Goldwurm (APC), Diego Götz (CEA), Xu-Hui Han (NAOC), Cyril Lachaud (APC), En-Wei Liang (GXU), Yu-Lei Qiu (NAOC), Susanna Vergani (Obs.Paris), Jing Wang (NAOC), Chao Wu (NAOC), Li-Ping Xin (NAOC), Bing Zhang (UNLV)
report on behalf of the SVOM team:
During the commissioning phase, the SVOM/ECLAIRs telescope triggered and located GRB 240914A (sb24091403) an intermediate duration GRB or SGR at 2024-09-14T01:40:03.9 UT (T0).
The following information was received on the ground with by the SVOM VHF Alert Network:
The burst was detected by the Count-Rate Trigger (CRT) onboard ECLAIRs. The signal to noise ratio in the reconstructed image is 10.5 in the 8-50 keV energy band during a time window of 5.12 s starting at T0. The transient location is RA, DEC = 54.281, -35.027 (J2000). The statistical uncertainty on this position is 10.3 arcminutes, to which we recommend to add 10 arcminutes of systematic uncertainty in quadrature during the commissioning phase.
SVOM did not slew to the burst since automated slewing was not enabled.
We note that this position is about 10 arcminutes from NGC 1380.
The Space Variable Objects Monitor (SVOM) is a China-France joint mission led by the Chinese National Space Administration (CNSA, China), French Space Agency (CNES, France) and the Chinese Academy of Sciences (CAS, China), which is dedicated to observing gamma-ray bursts and other transient phenomena in the energetic universe. ECLAIRs was developed jointly by APC, CEA, CNES and IRAP.
The SVOM point of contact for this burst is J-L Atteia: jean-luc.atteia@irap.omp.eu