STARITHM
Fermi GBM detected likely short GRB 260926B at RA=184.2°, Dec=4.8° with 11.6° uncertainty
AI Summary
The Fermi Gamma-ray Burst Monitor triggered on a likely short gamma-ray burst (GRB 260926B) on 2026-09-26 at 18:55:49 UT. The burst showed a significance of 8.5σ with a duration of 64 ms and intensity of 567 counts, detected across energy bands from 44 keV to 280 keV. Ground-based localization placed the source at RA=184.25°, Dec=4.79° (J2000) with an 11.6° statistical error circle; the burst was located 100° from the Fermi LAT boresight, limiting immediate gamma-ray follow-up capability.
Measurements
| Event ID | 812141754 |
|---|---|
| Source | Fermi GBM |
| Alert type | GRB |
| Significance | high |
| Trigger time (UTC) | Sat, 26 Sep 2026 18:55:49 GMT |
| Right ascension (J2000) | 184.25° |
| Declination (J2000) | 4.79° |
| Position error radius | 11.58° |
| GCN notices | 4 |
| GCN circulars | 1 |
Notices (1)
Fermi GBM — GRB · Sat, 26 Sep 2026 18:55:49 GMT
GCN Circulars (1)
GCN-45764 — GRB 260926B
· Sat, 26 Sep 2026 19:06:22 GMT
The Fermi Gamma-ray Burst Monitor (GBM) detected a likely short gamma-ray burst (GRB 260926B) on September 26, 2026, at 18:55:49 UT. The event was located at RA = 184.2, Dec = 4.8 (J2000) with a statistical uncertainty of 11.6 degrees, and the angle from the Fermi LAT boresight was 100.0 degrees.
AI summary generated Sun, 27 Sep 2026 06:45:41 GMT.