Fermi GBM detects a likely long GRB 260907B with significance and localization.

AI Summary

The Fermi Gamma-ray Burst Monitor detected a probable long-duration gamma-ray burst (GRB 260907B) on September 7, 2026. Initial localization indicated RA = 327.5, Dec = 24.9 with a statistical uncertainty of 5.8 degrees. Follow-up observations by the MASTER-SAAO telescope set an upper limit magnitude of 17.0 at the error box.

Measurements

Notices (1)

Fermi GBM — GRB · Mon, 07 Sep 2026 07:55:23 GMT

GCN Circulars (2)

GCN-45528 — GRB 260907B · Mon, 07 Sep 2026 17:33:28 GMT
The MASTER-SAAO robotic telescope in South Africa began observing the error box of the Fermi GRB 260907B 33,321 seconds after the notice time, with an upper limit magnitude of 17.0. Observations started at twilight with a zenith distance of 77 degrees and a sun altitude of -11.2 degrees, and multiple upper limits were obtained in the clear (unfiltered) band.

GCN-45525 — GRB 260907B · Mon, 07 Sep 2026 08:05:55 GMT
The Fermi Gamma-ray Burst Monitor (GBM) detected a likely long gamma-ray burst (GRB 260907B) on 7 September 2026 at 07:55:23 UT, located at RA = 327.5, Dec = 24.9 with a statistical uncertainty of 5.8 degrees. The event was significant enough to trigger the GBM, and its location and details are provided for further analysis.