TITLE:   GCN CIRCULAR
NUMBER:  9348
SUBJECT: Fermi Gamma-ray Burst Monitor trigger 263649437 is not a GRB
DATE:    09/05/11 16:02:58 GMT
FROM:    Arne Rau at MPE  <arau@mpe.mpg.de>

Arne Rau (MPE) and Michael Briggs (UAH), report on behalf of
the Fermi GBM Team:

“The Fermi Gamma-ray Burst Monitor (GBM) trigger 263649437 at 
11:57:15.99 UT
on 10 May 2009, tentatively classified as a GRB, is in fact not due
to a GRB. This trigger is due to a terrestrial gamma-ray flash."