STARITHM
Fermi GBM detects likely long GRB 261011B with localization uncertainty of 4.2 degrees
AI Summary
On October 11, 2026, Fermi GBM detected a likely long Gamma-Ray Burst (GRB 261011B) with precise coordinates RA = 185.63, Dec = -38.37 (J2000). The statistical localization uncertainty is approximately 4.2 degrees, and the burst duration was around 1 second with high significance.
Measurements
| Event ID | 813432415 |
|---|---|
| Source | Fermi GBM |
| Alert type | GRB |
| Significance | high |
| Trigger time (UTC) | Sun, 11 Oct 2026 17:26:50 GMT |
| Right ascension (J2000) | 0° |
| Declination (J2000) | 0° |
| Position error radius | 0° |
| GCN notices | 2 |
| GCN circulars | 1 |
Notices (1)
Fermi GBM — GRB · Sun, 11 Oct 2026 17:26:50 GMT
GCN Circulars (1)
GCN-45910 — GRB 261011B
· Sun, 11 Oct 2026 21:40:10 GMT
The Fermi Gamma-ray Burst Monitor (GBM) detected a likely long Gamma-Ray Burst (GRB 261011B) on 11 October 2026 at 17:26:50.57 UT. The event was localized to RA = 185.63, Dec = -38.37 (J2000) with a statistical uncertainty of 4.2 degrees, and the angle from the Fermi LAT boresight was 83 degrees.
AI summary generated Mon, 12 Oct 2026 16:45:53 GMT.