TITLE: GCN CIRCULAR NUMBER: 27248 SUBJECT: GRB 200228A: BALROG localization (Fermi Trigger 604565918 / GRB 200228291) DATE: 20/02/28 07:24:28 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 604565918 at 06:58:33 on 28 Feb. 2020 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) = 332.9+/-0.9 deg Decl.(2000.0) = -39.9+/-1.0 deg We estimate an additional systematic error of 1 deg. Further details are available at: https://grb.mpe.mpg.de/grb/GRB200228291/ The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB200228291/healpix The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB200228291/json