TITLE:   GCN CIRCULAR
NUMBER:  46115
SUBJECT: GRB 261030A: BALROG localization (Fermi Trigger 815070447 / GRB 261030686)
DATE:    26/10/30 16:51:50 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
815070447 at 16:27:22 on 30 Oct. 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) = 341.2 deg
Decl.(2000.0) = 7.5 deg
The 1 sigma statistical error radius is 1.7 deg.
We estimate an additional systematic error of 2 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB261030686/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB261030686/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB261030686/json