Fermi GBM detects gamma-ray burst with Galactic Center localization
AI Summary
Fermi GBM triggered on a gamma-ray burst at 2026-07-22T06:32:39.75Z (TrigID 806394764). The initial alerts strongly favor a Galactic Center origin (87-97% probability across multiple detections) with secondary AGN classification at 1-6% probability. The burst shows variable intensity (51-703 counts) and hardness ratios (38-50), with position refinement across sequential alerts. However, the latest alert classifies the location as unreliable, and no ground-generated confirmation or follow-up observations have been reported yet, warranting continued monitoring.
Measurements
| Event ID | 806394764 |
|---|---|
| Source | Fermi GBM |
| Alert type | GRB |
| Significance | medium |
| Trigger time (UTC) | Wed, 22 Jul 2026 06:32:39 GMT |
| Right ascension (J2000) | 123.65° |
| Declination (J2000) | 15.4333° |
| Position error radius | 4.65° |
| GCN notices | 6 |
| GCN circulars | 0 |
Notices (1)
Fermi GBM — GRB · Wed, 22 Jul 2026 06:32:39 GMT
AI summary generated Mon, 27 Jul 2026 14:42:52 GMT.