TITLE:   GCN CIRCULAR
NUMBER:  43343
SUBJECT: GRB 260105B: BALROG localization (Fermi Trigger 789348101 / GRB 260105973)
DATE:    26/01/06 08:43:43 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
789348101 at 23:21:36 on 05 Jan. 2026 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) = 258.7 deg
Decl.(2000.0) = 7.9 deg
The 1 sigma statistical error radius is 2.1 deg.
We estimate an additional systematic error of 1 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB260105973/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB260105973/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB260105973/json