TITLE:   GCN CIRCULAR
NUMBER:  37221
SUBJECT: GRB 240821A: BALROG localization (Fermi Trigger 745958167 / GRB 240821775)
DATE:    24/08/21 20:15:08 GMT
FROM:    Jochen Greiner at MPE <jcgrog@mpe.mpg.de>

T. Preis, B. Biltzinger, J. Burgess & J. Greiner (all MPE Garching) report:

The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
745958167 at 18:36:02 on 21 Aug. 2024 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 is:
RA(2000.0) = 352.9 deg
Decl.(2000.0) = -11.2 deg
The 1 sigma statistical error radius is 3.0 deg.
We estimate an additional systematic error of 1 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB240821775/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB240821775/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB240821775/json