GRB 260316A detected by multiple satellites with detailed follow-up

AI Summary

GRB 260316A was detected by SVOM/GRM, GECAM, Fermi/GBM, and AstroSat CZTI; characterized by a single pulse lasting 1.6-2.4 seconds with a fluence of 3.21e-06 erg/cm^2, and followed up optically where a counterpart candidate was identified.

Measurements

Notices (1)

SVOM — GRB · Mon, 16 Mar 2026 17:12:53 GMT

GCN Circulars (3)

GCN-44040 — GRB 260316A · Tue, 17 Mar 2026 15:46:38 GMT
GRB 260316A was detected by the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) at 2026-03-16T17:12:53.100 UTC. The burst, also detected by Fermi/GBM and SVOM, consisted of a single pulse with a duration (T90) of 2.2 seconds. The GECAM-B light curve is available at <https://www.bursthub.cn//admin/static/gecambgrb260316A.png>. GECAM is a Chinese mission consisting of three micro-satellites, GECAM-A, GECAM-B, and GECAM-C.

GCN-44039 — GRB 260316A · Tue, 17 Mar 2026 15:43:47 GMT
GRB 260316A was detected by the Space Variable Objects Monitor (SVOM)/GRM, triggering an in-flight observation. The burst consisted of a single pulse with a duration of approximately 1.6 seconds and a fluence of 3.21e-06 erg/cm^2 in the 10-1000 keV energy range. The position of the burst, determined by Fermi/GBM, was outside the SVOM/ECLAIRs field of view. The time-averaged spectrum was best fitted by a power law function with a power law index of -2.23.

GCN-44035 — GRB 260316A · Tue, 17 Mar 2026 09:51:41 GMT
Astronomers using the AstroSat CZTI collaboration detected a gamma-ray burst (GRB 260316A) in the 20-200 keV energy range. The burst, also detected by Fermi GBM, Calet, and SVOM, peaked at 17:12:53.75 UTC with a peak count rate of 524 counts/s above the background. The source was faintly detected in the CsI anticoincidence detector in the 100-500 keV energy range.