TITLE:   GCN CIRCULAR
NUMBER:  30531
SUBJECT: GRB 210727A: BALROG localization (Fermi Trigger 649072251 / GRB 210727410)
DATE:    21/07/27 11:44:42 GMT
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
649072251 at 09:50:46 on 27 July 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) = 184.2+/-6.6 deg
Decl.(2000.0) = -64.3+/-3.5 deg
We estimate an additional systematic error of 2 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB210727410/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB210727410/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB210727410/json