TITLE:   GCN CIRCULAR
NUMBER:  30727
SUBJECT: GRB 210827B: BALROG localization (Fermi Trigger 651751821 / GRB 210827424)
DATE:    21/08/27 10:28:30 GMT
FROM:    Jochen Greiner at MPE,Garching  <jcg@mpe.mpg.de>

J. Burgess, F. Kunzweiler, B. Biltzinger, F. Berlato,  & J. Greiner (all MPE Garching) report:

The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
651751821 at 10:10:16 on 27 Aug. 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) = 305.1+/-2.9 deg
Decl.(2000.0) = -17.3+/-2.3 deg
We estimate an additional systematic error of 1 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB210827424/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB210827424/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB210827424/json