TITLE:   GCN CIRCULAR
NUMBER:  44750
SUBJECT: Fermi Gamma-ray Burst Monitor trigger 801900520/260531256 is not a GRB
DATE:    26/05/31 21:26:24 GMT
FROM:    Eva M. Palafox at INAOE <eva.palafox@gmail.com>

B. Mailyan (Florida Tech), E. Palafox (INAOE, Mexico) report on behalf of the Fermi Gamma-ray Burst Monitor Team:

"The Fermi Gamma-ray Burst Monitor (GBM) trigger 801900520/260531256 at 06:08:35.57 UT
on 31 May 2026, tentatively classified as a GRB, is in fact not due
to a GRB. This trigger is likely due to particle activity."