TITLE: GCN CIRCULAR NUMBER: 37655 SUBJECT: GRB 241001A : Detection of a soft transient by ECLAIRs onboard SVOM DATE: 24/10/01 17:59:27 GMT FROM: s.schanne@cea.fr SVOM/ECLAIRs Commissioning Team: Nicolas Dagoneau, Stéphane Schanne, Frédéric Chateau, Hervé Le Provost (CEA), Wenjin Xie (NAOC), Jean-Luc Atteia, Laurent Bouchet, Sebastien Guillot, Juliette Alaux (IRAP), Tais Maiolino (LUPM), Alexis Coleiro (APC), 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 a soft transient, called GRB 241001A (sb24100102) at 2024-10-01T17:08:45 UT (TimtTb). The following information from the ECLAIRs onboard trigger was received on ground with low-latency by the SVOM VHF Alert Network. The burst was detected by the Count-Rate Trigger (CRT) which produced 3 Alerts in the 5-8 keV energy band. The best Alert has a signal-to-noise ratio of 7.8 over a time window of 5.12 s starting at TimtTb. A clear point-like source is visible in the deconvolved sky image downloaded. The GRB location is RA, Dec = 20.42, -43.53 (J2000), far from the Galactic plane (L, B = 75.56, -72.49). The statistical uncertainty on this position is 11.0 arcminutes, to which we recommend adding 10 arcminutes of systematic uncertainty in quadrature. SVOM did not slew to the burst since automated slewing was not enabled. 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. View this GCN Circular online at https://gcn.nasa.gov/circulars/37655. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...