{
  "body": "W.J. Xie (NAOC), Y.H. Cheng (SWIFAR, YNU), B.T. Wang (YNAO, CAS), O. Godet, S. Guillot (IRAP), S. Schanne (CEA), M. Brunet (IRAP) on behalf of the SVOM mission team.\n\nSVOM/ECLAIRs triggered on the gamma-ray burst GRB 250329B (SVOM burst-id sb25032902) starting at 2025-03-29T12:10:18 UTC (Tb).\n\nThe following trigger information was received on the ground with low latency by the SVOM VHF Alert Network.\n\nThe burst was detected by the Image Trigger (IMT), which produced a sequence of 2 alerts. IMT provided the alert with the best signal-to-noise-ratio (SNR) of 7.33 in the 8-120 keV energy band over a time window of 40.96 seconds starting at Tb.\n\nThe localization of the best alert is R.A., Dec 207.6731, 52.8853 degrees:\nRA (J2000) = 13h50m41.55s\nDec (J2000) = 52d53m07.02s\nwith a 90% C.L. radius of 10.69 arcmin (including systematic error of 2 arcmin added in quadrature).\n\nNo immediate slew was performed on this burst, because its significance was below the slew threshold. A SVOM ToO will be performed.\n\nThe Space-based multi-band astronomical 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.\n\nThe Burst Advocate (BA) on shift for this burst is Wenjin XIE: xiewj@bao.ac.cn.\nPlease contact the BA by email if you require additional information regarding the SVOM follow-up of this burst.\n\n",
  "circularId": 39925,
  "subject": "GRB 250329B: SVOM detection of a faint transient ",
  "submittedHow": "web",
  "bibcode": "2025GCN.39925....1X",
  "eventId": "GRB 250329B",
  "format": "text/plain",
  "submitter": "SVOM_group <svomgroup@bao.ac.cn>",
  "createdOn": 1743254662869
}