TITLE: GCN CIRCULAR NUMBER: 38697 SUBJECT: GRB 241229A: SVOM detection of a long burst DATE: 24/12/29 01:42:15 GMT FROM: SVOM_group svomgroup@bao.ac.cn
Yifang Liang (PMOC), An Li (BNU), Wenjin Xie, Donghua Zhao (NAOC), Hui Yang (IRAP), Hatsune Goto (CEA), Li Zhang (IHEP), Lipin Xin (NAOC) report:
At 2024-12-29T00:04:21 (Tb) SVOM/ECLAIRs triggered on GRB 241229A (SVOM burst-id sb24122901).
The following trigger information was received on the ground with low-latency by the SVOM VHF Alert Network. A total of 8 Alerts were received from Count-Rate Trigger (CRT) and Image Trigger (IMT). The best Alert was produced by CRT with a signal-to-noise ratio of 11.0 in the 8-120 keV energy band over a time window of 20.48 s starting at Tb.
The localization of the best Alert is RA, DEC = 192.893, +31.857 (J2000) with a 90% C.L. radius of 7.6 arcmin (including a systematic error of 2 arcmin added in quadrature).
SVOM slewed automatically to the burst. GRM, MXT and VT data will be reported later.
Burst Advocate for this burst is Yifang Liang (yfliang@pmo.ac.cn). Please contact the BA by email if you require additional information regarding the SVOM follow-up of this burst.
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