TITLE:   GCN CIRCULAR
NUMBER:  40105
SUBJECT: GRB 250407A: BALROG localization (Fermi Trigger 765733706 / GRB 250407659)
DATE:    25/04/07 16:20:40 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
765733706 at 15:48:21 on 07 April 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) = 111.6 deg
Decl.(2000.0) = 36.5 deg
The 1 sigma statistical error radius is 3.5 deg.
We estimate an additional systematic error of 2 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB250407659/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB250407659/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB250407659/json