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Fermi GBM detects GRB 261101B with significant gamma-ray emission
AI Summary
On November 1, 2026, Fermi GBM detected a likely long gamma-ray burst (GRB 261101B) at 15:37:52 UT. The burst exhibited high significance and intensity across multiple detectors, with localizations indicating RA = 321.6 deg, Dec = 14.6 deg (J2000) and RA = 316.3 deg, Dec = 9.8 deg (J2000), each with respective uncertainties.
Measurements
| Event ID | 815240277 |
|---|---|
| Source | Fermi GBM |
| Alert type | GRB |
| Significance | high |
| Trigger time (UTC) | Sun, 01 Nov 2026 15:37:52 GMT |
| Right ascension (J2000) | 321.65° |
| Declination (J2000) | 14.55° |
| Position error radius | 1.96° |
| GCN notices | 7 |
| GCN circulars | 2 |
Notices (1)
Fermi GBM — GRB · Sun, 01 Nov 2026 15:37:52 GMT
GCN Circulars (2)
GCN-46127 — GRB 261101B
· Sun, 01 Nov 2026 16:00:44 GMT
A gamma-ray burst (GRB 261101B) was detected by the Fermi Gamma-ray Burst Monitor on November 1, 2026, at 15:37:52. The event was localized using the BALROG algorithm, with a best-fit position at RA 316.3 deg and Decl. 9.8 deg, and an estimated error radius of 3.3 deg (statistical) and 2 deg (systematic).
GCN-46126 — GRB 261101B
· Sun, 01 Nov 2026 15:48:21 GMT
The Fermi Gamma-ray Burst Monitor (GBM) detected a likely long gamma-ray burst (GRB 261101B) on November 1, 2026, at 15:37:52 UT. The event was localized to RA = 321.6, Dec = 14.6 (J2000) with a statistical uncertainty of 2.0 degrees.
AI summary generated Sun, 01 Nov 2026 18:00:11 GMT.