TITLE: GCN CIRCULAR NUMBER: 24332 SUBJECT: Fermi Trigger 578170097 / GRB 190428783 / GRB190428A: BALROG localization DATE: 19/04/28 19:29:10 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 578170097 at 18:48:12 on 28 April 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) = 34.5+/-2.8 deg Decl.(2000.0) = 19.4+/-2.1 deg We estimate an additional systematic error of 1 deg. Further details are available at: https://grb.mpe.mpg.de/grb/GRB190428783/ The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB190428783/healpix The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB190428783/json