TITLE: GCN CIRCULAR NUMBER: 35813 SUBJECT: Fermi Gamma-ray Burst Monitor trigger 730618809/240226236 is not a GRB DATE: 24/02/27 00:17:45 GMT FROM: Lorenzo Scotton at UAH L. Scotton (UAH) reports on behalf of the Fermi Gamma-ray Burst Monitor Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 730618809/240226236 at 05:40:04.58 UT on 26 February 2024 was initially classified as a GRB, and named GRB 240226B (GCN 35809). This trigger is in fact not due to a GRB, but to a solar flare."