TITLE: GCN CIRCULAR NUMBER: 14664 SUBJECT: Fermi GBM trigger 390275038 / 130515072 is not a GRB DATE: 13/05/15 18:56:33 GMT FROM: Peter Jenke at MSFC P. Jenke (UAH), reports on behalf of the Fermi Gamma-ray Burst Monitor Team: “The Fermi Gamma-ray Burst Monitor (GBM) trigger 390275038 / 130515072 at 01:43:55.53 UT on 15 May 2013, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is due to an X-class solar flare."