{
  "bibcode": "2025GCN.40168....1W",
  "eventId": "GRB 250419A",
  "format": "text/plain",
  "body": "B.-T. Wang (YNAO, CAS), Y.H. Cheng (SWIFAR,YNU), W. J. Xie, D. H. ZHAO (NAO, CAS), C. W. WANG (IHEP) on behalf of the SVOM mission team.\n\nAt 2025-04-19T02:29:32 UTC (Tb) SVOM/ECLAIRs triggered on the gamma-ray burst GRB 250419A (SVOM burst-id sb25041901).\n\nThe following trigger information was received on the ground with low latency by the SVOM VHF Alert Network.\n\nThe burst was detected both by the Count-Rate Trigger (CRT) and the Image Trigger (IMT), which produced a sequence of 5 alerts. CRT provided the alert with the best signal-to-noise-ratio (SNR) of 8.62 in the [5-8] keV energy band over a time window of 20.40 seconds starting at Tb.\n\nThe localization of the best alert is R.A., Dec 202.387, 7.086 degrees:\nRA (J2000) = 13h29m32.97s\nDec (J2000) = 7d05m09.92s\nwith a 90% C.L. radius of 9.15 arcmin (including systematic error of 2 arcmin added in quadrature).\n\nSVOM slewed to the burst.\n\nNo prompt X-ray observation could be performed by MXT.\n\nVT began observing the field after the slew. The analysis of the recorded images will be published in a future circular gathering information on the follow-up of the SVOM optical instruments.\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 Boting Wang: wangbaiting@ynao.ac.cn.\nPlease contact the BA by email if you require additional information regarding the SVOM follow-up of this burst.",
  "circularId": 40168,
  "submitter": "SVOM_group <svomgroup@bao.ac.cn>",
  "createdOn": 1745032956174,
  "subject": "GRB 250419A: SVOM detection of a soft burst",
  "submittedHow": "web"
}