[vsnet-grb-info 20970] Fermi GBM trigger 554730582/180731493 is not a GRB

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  23068
SUBJECT: Fermi GBM trigger 554730582/180731493 is not a GRB
DATE:    18/07/31 14:38:42 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 554730582/180731493 at 11:49:37.31 UT
on 31 July 2018, tentatively classified as a GRB, is in fact not due to a GRB.
This trigger is due to a terrestrial gamma-ray flash (TGF)."