GCN Circular 31239
Subject
GRB 211216A: BALROG localization (Fermi Trigger 661329957 / GRB 211216282)
Date
2021-12-16T07:22:31Z (3 years ago)
From
Jochen Greiner at MPE,Garching <jcg@mpe.mpg.de>
B. Biltzinger, F. Kunzweiler, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
661329957 at 06:45:52 on 16 Dec. 2021 were automatically fitted for spectrum
and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427;
Berlato et al. 2019, ApJ 873, 60).
The best-fit position (1 sigma statistical errors) is:
RA(2000.0) = 51.0+/-2.4 deg
Decl.(2000.0) = -62.2+/-4.0 deg
We estimate an additional systematic error of 2 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB211216282/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB211216282/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB211216282/json