TITLE:   GCN CIRCULAR
NUMBER:  34864
SUBJECT: GRB 231020B: BALROG localization (Fermi Trigger 719530557 / GRB 231020900)
DATE:    23/10/21 07:02:45 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
719530557 at 21:35:52 on 20 Oct. 2023 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) = 221.6+/-0.4 deg
Decl.(2000.0) = 17.6+/-0.6 deg
We estimate an additional systematic error of 1 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB231020900/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB231020900/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB231020900/json