TITLE: GCN CIRCULAR NUMBER: 44644 SUBJECT: Fermi Gamma-ray Burst Monitor trigger 800627191/260516518 is not a GRB DATE: 26/05/16 14:08:33 GMT FROM: Utkarsh Pathak at IIT Bombay U. Pathak (IITB) reports on behalf of the Fermi Gamma-ray Burst Monitor Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 800627191/260516518 at 12:26:26.60 UT on 16 May 2026, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is likely due to local particles."