GRB 201218A: BALROG localization (Fermi Trigger 629957660 / GRB 201218177)

The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger 629957660 at 04:14:15 on 18 Dec. 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) = 287.38+/-0.29 deg Decl.(2000.0) = 26.80+/-0.30 deg We estimate an additional systematic error of 1 deg. Further details are available at: https://grb.mpe.mpg.de/grb/GRB201218177/ The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB201218177/healpix The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB201218177/json