TITLE: GCN CIRCULAR NUMBER: 34827 SUBJECT: GRB 231018A: BALROG localization (Fermi Trigger / GRB 231018521) DATE: 23/10/18 13:15:13 GMT FROM: Jochen Greiner at MPE <jcgrog@mpe.mpg.de> T. Preis, B. Biltzinger, J. Burgess & J. Greiner (all MPE Garching) report: The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger at 12:30:10 on 18 Oct. 2023 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) = 1.2+/-0.5 deg Decl.(2000.0) = 51.5+/-0.2 deg We estimate an additional systematic error of 1 deg. Further details are available at: https://grb.mpe.mpg.de/grb/GRB231018521/ The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB231018521/healpix The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB231018521/json View this GCN Circular online at https://gcn.nasa.gov/circulars/34827. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...