TITLE: GCN CIRCULAR NUMBER: 45460 SUBJECT: Fermi GBM trigger 809666623/260829141 is not a GRB DATE: 26/08/29 04:11:56 GMT FROM: rhamburg@usra.edu R. Hamburg (USRA) reports report on behalf of the Fermi Gamma-ray Burst Monitor Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 809666623/260829141 at 03:23:38.10 UT on 29 August 2026, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is likely due to local particles."