GCN Circular 37799

SVOM/ECLAIRs Commissioning Team:  Hervé Le Provost, Stéphane Schanne, Frédéric Chateau, Nicolas Dagoneau (CEA), Jean-Luc Atteia, Laurent Bouchet, Sebastien Guillot, Juliette Alaux (IRAP), Wenjin Xie (NAOC), Alexis Coleiro (APC), 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), Olivier Godet (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 the soft transient, labelled GRB 241017A (sb24101702) at 2024-10-17T03:57:04 UT (Tb).

The burst was detected by the Image Trigger (IMT), which sent 1 Alert, with a signal-to-noise ratio of 6.9 in the 5-8 keV energy band over a time window of 40.96 s starting at Tb.
The excess was confirmed after reception of the full dataset on ground.

The localization of the burst is RA, Dec = 356.28, 15.72 (J2000).

The statistical uncertainty on this position is 12.4 arcminutes, to which we recommend adding 10 arcminutes of systematic uncertainty in quadrature.

The significance of the detection was too low to request an automatic slew of SVOM to the burst position.

The Space Variable Objects Monitor (SVOM) is a China-France joint mission led by the Chinese National Space Administration (CNSA), French Space Agency (CNES), and the Chinese Academy of Sciences (CAS), 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: s.schanne AT cea.fr