TITLE: GCN CIRCULAR NUMBER: 36916 SUBJECT: Fermi Gamma-ray Burst Monitor trigger 743243582/240721356 (GRB 240721A) is not a GRB DATE: 24/07/21 16:28:21 GMT FROM: Cori Fletcher at USRA <cfletcher@usra.edu> B. Mailyan (Florida Tech) reports on behalf of the Fermi Gamma-ray Burst Monitor Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 743243582/240721356 (GRB 240721A, GCN 36914) at 08:32:57.02 UT on 21 July 2024, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is likely due to a solar flare." View this GCN Circular online at https://gcn.nasa.gov/circulars/36916. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...