TITLE: GCN CIRCULAR NUMBER: 25820 SUBJECT: GRB 190923A: BALROG localization (Fermi Trigger 590942887 / GRB 190923617) DATE: 19/09/23 15:09:00 GMT FROM: Jochen Greiner at MPE,Garching F. Kunzweiler, B. Biltzinger, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report: The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger 590942887 at 14:48:02 on 23 Sept. 2019 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 (1 sigma statistical errors) is: RA(2000.0) = 5.9+/-1.6 deg Decl.(2000.0) = -14.0+/-1.3 deg We estimate an additional systematic error of 1 deg. Further details are available at: https://grb.mpe.mpg.de/grb/GRB190923617/ The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB190923617/healpix The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB190923617/json