[vsnet-grb-info 19331] Fermi GBM trigger 514436208/170421123 is not a GRB

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  21028
SUBJECT: Fermi GBM trigger 514436208/170421123 is not a GRB
DATE:    17/04/21 08:49:42 GMT
FROM:    Andreas von Kienlin at MPE  <azk at mpe.mpg.de>

A. von Kienlin (MPE) reports on behalf of the Fermi GBM Team: 

 "The Fermi Gamma-ray Burst Monitor (GBM) trigger 514436208/170421123 
at 02:56:43.38 UT on 21 April 2017, tentatively classified as a GRB, 
is in fact not due to a GRB. This trigger is due to local particles."