TITLE:   GCN CIRCULAR
NUMBER:  45604
SUBJECT: GRB 260917A: BALROG localization (Fermi Trigger 811304653 / GRB 260917100)
DATE:    26/09/17 02:57:11 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
811304653 at 02:24:08 on 17 Sept. 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) = 310.2 deg
Decl.(2000.0) = -31.9 deg
The 1 sigma statistical error radius is 1.4 deg.
We estimate an additional systematic error of 1 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB260917100/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB260917100/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB260917100/json