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."