STARITHM
Fermi GBM detected long GRB 260926C at RA=313.8°, Dec=10.1° with 5.3° uncertainty
AI Summary
The Fermi Gamma-ray Burst Monitor triggered on a likely long gamma-ray burst (GRB 260926C) on 2026 September 26 at 23:27:12 UT. The burst was localized to RA = 313.8°, Dec = 10.1° (J2000) with a statistical uncertainty of 5.3 degrees, placing it 46 degrees from the Fermi LAT boresight. The event showed a burst significance of 16.3 sigma with energy range 44-280 keV, and subsequent ground-processed positions refined the localization. Classification analysis suggests a possible AGN or starbursting galaxy origin with 76-78% probability, though the GRB classification remains valid.
Measurements
| Event ID | 812158037 |
|---|---|
| Source | Fermi GBM |
| Alert type | GRB |
| Significance | high |
| Trigger time (UTC) | Sat, 26 Sep 2026 23:27:12 GMT |
| Right ascension (J2000) | 313.8° |
| Declination (J2000) | 10.13° |
| Position error radius | 5.26° |
| GCN notices | 6 |
| GCN circulars | 1 |
Notices (1)
Fermi GBM — GRB · Sat, 26 Sep 2026 23:27:12 GMT
GCN Circulars (1)
GCN-45766 — GRB 260926C
· Sat, 26 Sep 2026 23:37:41 GMT
The Fermi Gamma-ray Burst Monitor (GBM) detected a likely long gamma-ray burst (GRB 260926C) on September 26, 2026, at 23:27:12 UT. The event was located at RA = 313.8, Dec = 10.1 (J2000) with a statistical uncertainty of 5.3 degrees.
AI summary generated Sun, 27 Sep 2026 00:45:15 GMT.