Fermi GBM trigger 805929723: Probable non-GRB transient with 47% confidence
Event ID: 805929723
Significance: low
Notices: 2
Generated: Sat, 18 Jul 2026 14:58:40 GMT
AI Summary
Fermi GBM detected a transient event on 2026-07-16 at 21:21:58.61 UTC with a significance of 9.7-9.8σ over 16 ms timescale. The automated classification indicates only 47% probability of GRB origin, with AGN (36%) as the second-most likely classification. The event was localized to RA=260.07°, Dec=-5.92° with a 14.2° error radius, showing a hardness ratio of 2.74 and burst intensity of 1537 counts. No follow-up observations or GCN circulars have been issued, and the delayed transmission flag suggests this was a flight-generated alert with marginal astrophysical significance.
Notices (1)
Fermi GBM — GRB · Thu, 16 Jul 2026 21:21:58 GMT