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GCN Circular 45039

Subject
Fermi GBM trigger 804010507/260624677 is not a GRB
Date
2026-06-24T17:44:48Z (14 days ago)
From
rhamburg@usra.edu
Via
Web form
R. Hamburg (USRA) reports report on behalf of the Fermi Gamma-ray Burst Monitor Team:

"The Fermi Gamma-ray Burst Monitor (GBM) trigger 804010507/260624677 at 16:15:02.91 UT on 24 June 2026, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is likely due to particle activity."
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