Fermi GBM detects gamma-ray burst trigger 806066200 with ambiguous classification
Event ID: 806066200
Significance: medium
Notices: 4
Generated: Sat, 18 Jul 2026 14:58:44 GMT
AI Summary
Fermi GBM triggered on a gamma-ray transient on 2026-07-18 at 11:16:35 UTC with a significance of 4.8σ and duration of ~4.1 seconds. The event shows conflicting classifications: the flight-processed analysis suggests AGN or SGR Complex with equal 44% probabilities, while ground-based localization indicates a possible GRB with 5σ significance. Position estimates vary significantly across processing algorithms (RA: 26.6°–42.1°, Dec: −50.9° to −38.6°), with localization uncertainties of 12.8°–29.7°. No GCN circulars or follow-up observations have been reported yet.
Notices (1)
Fermi GBM — GRB · Sat, 18 Jul 2026 11:16:35 GMT