GRB 261024A detected by Fermi GBM and followed up by other instruments

AI Summary

A long-duration gamma-ray burst (GRB 261024A) was detected on October 24, 2026, by Fermi GBM. It showed multiple pulses with a T90 of 7.0 seconds and a peak energy of 138 keV. Follow-up observations from SVOM/GRM and NuSTAR provided additional insights into the burst's characteristics.

Measurements

Notices (1)

Fermi GBM — GRB · Sat, 24 Oct 2026 16:23:00 GMT

GCN Circulars (4)

GCN-46057 — GRB 261024A · Tue, 27 Oct 2026 07:22:26 GMT
The SVOM/GRM instrument detected a gamma-ray burst, GRB 261024A, on October 24, 2026, which was also observed by Fermi/GBM. The burst exhibited multiple pulses with a duration (T90) of 7.0 seconds and a peak energy of 138 keV, providing valuable data for studying gamma-ray bursts and transient phenomena.

GCN-46031 — GRB 261024A · Mon, 26 Oct 2026 06:39:29 GMT
The NuSTAR SINGS working group detected prompt emission from the long-duration gamma-ray burst GRB 261024A using the NuSTAR CsI anti-coincidence shields. This detection, also observed by Fermi-GBM, involved a single-peaked burst lasting about 10 seconds with a peak count rate of approximately 1500 counts per second.

GCN-46020 — GRB 261024A · Sat, 24 Oct 2026 16:50:33 GMT
A gamma-ray burst, designated GRB 261024A, was detected by the Fermi Gamma-ray Burst Monitor on October 24, 2026. The event was localized using the BALROG algorithm, with a best-fit position at RA(2000.0) = 311.8 deg and Decl.(2000.0) = 59.9 deg, and an estimated total error radius of 2.2 degrees.

GCN-46019 — GRB 261024A · Sat, 24 Oct 2026 16:33:31 GMT
The Fermi Gamma-ray Burst Monitor (GBM) detected a likely long gamma-ray burst (GRB 261024A) on October 24, 2026, at 16:23:00 UT. The burst was located at RA = 317.0, Dec = 63.1 (J2000) with a statistical uncertainty of 1.6 degrees, and the angle from the Fermi LAT boresight was 49.0 degrees.