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GCN Circular 18714

Subject
Fermi GBM trigger 151221690 is not a GRB
Date
2015-12-21T23:55:57Z (8 years ago)
From
Peter Jenke at MSFC <peter.a.jenke@nasa.gov>
P. Jenke (UAH) reports on behalf of the Fermi GBM team:

"The Fermi Gamma-ray Burst Monitor (GBM) trigger 472408444/151221690
at 16:34:00.82 UT on the 21th of December 2015, tentatively classified 
as a GRB, is in fact not due to a GRB. This trigger is due to a 
local particles."
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