TITLE: GCN CIRCULAR NUMBER: 30642 SUBJECT: GRB 210813A: BALROG localization (Fermi Trigger 650508868 / GRB 210813038) DATE: 21/08/13 04:08:35 GMT FROM: Jochen Greiner at MPE,Garching B. Biltzinger, F. Kunzweiler, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report: The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger 650508868 at 00:54:23 on 13 Aug. 2021 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) = 11.7+/-2.5 deg Decl.(2000.0) = 8.6+/-2.2 deg We estimate an additional systematic error of 1 deg. Further details are available at: https://grb.mpe.mpg.de/grb/GRB210813038/ The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB210813038/healpix The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB210813038/json