TITLE: GCN CIRCULAR NUMBER: 40581 SUBJECT: Fermi Gamma-ray Burst Monitor trigger 770296643/250530470 is not a GRB DATE: 25/05/30 14:00:40 GMT FROM: Peter Veres at University of Alabama in Huntsville veresp@gmail.com

"The Fermi Gamma-ray Burst Monitor (GBM) trigger 770296643/250530470 at 11:17:18.008 UT on 30 May 2025, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is likely due a particle event."

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