TITLE: GCN CIRCULAR NUMBER: 20608 SUBJECT: Fermi GBM trigger 508010837/170205755 is not a GRB DATE: 17/02/05 19:09:26 GMT FROM: Matthew Stanbro at UAH/Fermi M. Stanbro (UAH) reports on behalf of the Fermi GBM Team: The Fermi Gamma-ray Burst Monitor (GBM) trigger 508010837/170205755 at 18:07:12.64 UT on 05 February 2017, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is due to local particles.