TITLE: GCN CIRCULAR NUMBER: 8663 SUBJECT: Fermi Gamma-ray Burst Monitor trigger 250533995 is not a GRB DATE: 08/12/12 21:15:58 GMT FROM: Colleen A. Wilson at NASA/MSFC/NSSTC Colleen A. Wilson-Hodge reports on behalf of the Fermi Gamma-ray Burst Monitor Team: The Fermi Gamma-ray Burst Monitor (GBM) trigger 250533995 at 16:46:34.31 UT on 09 December 2008, tentatively classified by the GBM flight software as a GRB, is in fact not due to a GRB or any other astrophysical source. This trigger is probably due to a coincidental chance fluctuation in two GBM detectors.