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GCN Circular 36916

Subject

Fermi Gamma-ray Burst Monitor trigger 743243582/240721356 (GRB 240721A) is not a GRB

Date

2024-07-21T16:28:21Z (4 months ago)

From

Cori Fletcher at USRA <cfletcher@usra.edu>

Via

Web form

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 36914Not found
 
 
) 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."