TITLE: GCN CIRCULAR NUMBER: 15504 SUBJECT: Fermi Gamma-ray Burst Monitor trigger 406601061 / 131120031 is not a GRB DATE: 13/11/20 02:50:21 GMT FROM: Peter Jenke at MSFC P. Jenke (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team: “The Fermi Gamma-ray Burst Monitor (GBM) trigger 406601061 / 131120031 at 00:44:18.02 UT on 20 November 2013, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is due to local particles."