Fermi GBM detects GRB 260808A with likely AGN origin

AI Summary

On Aug 8, 2026, Fermi GBM detected GRB 260808A with a likely AGN origin, localizing it to RA(2000.0)=344.1 deg, Decl.(2000.0)=11.9 deg within 3.9 degrees accuracy. MASTER-OAFA reported no optical counterpart.

Measurements

Notices (1)

Fermi GBM — GRB · Sat, 08 Aug 2026 02:51:42 GMT

GCN Circulars (3)

GCN-45315 — GRB 260808A · Sat, 08 Aug 2026 06:09:23 GMT
A gamma-ray burst, designated GRB 260808A, was detected by the Fermi Gamma-ray Burst Monitor (GBM) on August 8, 2026. The event was localized using the BALROG algorithm, with a best-fit position at RA(2000.0) = 344.1 deg and Decl.(2000.0) = 11.9 deg, and an estimated error radius of 2.9 degrees plus an additional systematic error of 1 degree.

GCN-45314 — GRB 260808A · Sat, 08 Aug 2026 04:46:20 GMT
The MASTER-OAFA robotic telescope in Argentina began observing the error box of Fermi GRB 260808A 99 seconds after the alert, with an upper limit magnitude of 19.2. The observations were conducted under specific galactic coordinates and atmospheric conditions, with no optical transient detected.

GCN-45313 — GRB 260808A · Sat, 08 Aug 2026 03:02:15 GMT
The Fermi Gamma-ray Burst Monitor (GBM) detected a likely long gamma-ray burst (GRB 260808A) on August 8, 2026, at 02:51:42 UT. The event was located at RA = 341.8, Dec = 14.1 (J2000) with a statistical uncertainty of 2.2 degrees, and the angle from the Fermi LAT boresight was 72.0 degrees.