TITLE:   GCN CIRCULAR
NUMBER:  18713
SUBJECT: Fermi GBM trigger 472271765/151220108 is not a GRB
DATE:    15/12/21 12:48:56 GMT
FROM:    Hoi-Fung Yu at MPE  <sptfung@mpe.mpg.de>

Hoi-Fung Yu (MPE) reports on behalf of the Fermi GBM Team:

"The Fermi Gamma-ray Burst Monitor (GBM) trigger 472271765/151220108
at 02:36:01.57 UT on 20 December 2015, tentatively classified as a GRB,
is in fact not due to a GRB.

This trigger is due to particle activity."