Short GRB 260907A detected by Fermi GBM, SVOM, and Glowbug on ISS

AI Summary

Fermi GBM triggered on a likely short gamma-ray burst (GRB 260907A) at 2026-09-07T00:28:01.94Z, localized to RA=22.4°, Dec=-39.0° with 8.4° uncertainty. The burst was independently confirmed by SVOM/GRM (T90=0.6s, power-law index -1.30) and Glowbug on the ISS (duration 0.26s, 19σ significance), with fluence of 7.56×10⁻⁷ erg/cm². Ground-based optical follow-up by MASTER-OAFA began ~3.15 hours post-trigger with limiting magnitude 20.5, though no optical counterpart was reported.

Measurements

Notices (1)

Fermi GBM — GRB · Mon, 07 Sep 2026 00:28:01 GMT

GCN Circulars (4)

GCN-45555 — GRB 260907A · Sat, 12 Sep 2026 13:18:50 GMT
The SVOM/GRM instrument detected a gamma-ray burst (GRB 260907A) on September 7, 2026, which was also observed by Fermi/GBM and Glowbug. The burst exhibited multiple peaks with a T90 duration of 0.6 seconds and a power-law spectrum with an index of -1.30.

GCN-45530 — GRB 260907A · Tue, 08 Sep 2026 15:37:26 GMT
The Glowbug gamma-ray telescope on the International Space Station detected a likely short gamma-ray burst, GRB 260907A, with a duration of 0.26 seconds and a significance of 19.0 sigma. This event was also detected by the Fermi/GBM and is notable for its brief but intense gamma-ray emission.

GCN-45524 — GRB 260907A · Mon, 07 Sep 2026 04:31:48 GMT
The MASTER-OAFA robotic telescope in Argentina began observing the Fermi GRB 260907A error box approximately 11,328 seconds after the notice time, with upper magnitude limits up to 20.5. The observations were conducted in a clear (unfiltered) band, and the data is available for further analysis and reduction.

GCN-45523 — GRB 260907A · Mon, 07 Sep 2026 00:38:36 GMT
The Fermi Gamma-ray Burst Monitor (GBM) detected a likely short gamma-ray burst (GRB 260907A) on September 7, 2026, at 00:28:01 UT. The event was located at RA = 22.4, Dec = -39.0 (J2000) with a statistical uncertainty of 8.4 degrees.