TITLE:   GCN CIRCULAR
NUMBER:  20320
SUBJECT: Fermi GBM trigger 503982114/161221126 is not a GRB
DATE:    16/12/21 13:36:16 GMT
FROM:    Oliver Roberts at UCD/Fermi  <oliver.roberts@ucd.ie>

O.J. Roberts (UCD) reports on behalf of the Fermi GBM Team:

"The Fermi Gamma-ray Burst Monitor (GBM) trigger
503982114/161221126 at 03:01:50.55 UT on 21 December 2016,
tentatively classified as a GRB, is in fact not due to a GRB.
This trigger is due to local particles."