TITLE: GCN CIRCULAR NUMBER: 29391 SUBJECT: GRB 210204A: BALROG localization (Fermi Trigger 634112970 / GRB 210204270) DATE: 21/02/04 06:59:58 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 634112970 at 06:29:25 on 04 Feb. 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) = 118.6+/-3.1 deg Decl.(2000.0) = 12.0+/-3.1 deg We estimate an additional systematic error of 1 deg. Further details are available at: https://grb.mpe.mpg.de/grb/GRB210204270/ The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB210204270/healpix The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB210204270/json