TITLE:   GCN CIRCULAR
NUMBER:  43190
SUBJECT: GRB 251222A: BALROG localization (Fermi Trigger  / GRB 251222712)
DATE:    25/12/22 18:24:42 GMT
FROM:    Jochen Greiner at MPE <jcgrog@mpe.mpg.de>

T. Preis (University of Innsbruck) & J. Greiner (MPE Garching) report:

The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
 at 17:05:51 on 22 Dec. 2025 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) = 76.6 deg
Decl.(2000.0) = -7.7 deg
The 1 sigma statistical error radius is 2.5 deg.
We estimate an additional systematic error of 1 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB251222712/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB251222712/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB251222712/json