TITLE: GCN CIRCULAR NUMBER: 40701 SUBJECT: GRB 250612A: BALROG localization (Fermi Trigger 771424081 / GRB 250612519) DATE: 25/06/12 13:17:08 GMT FROM: Jochen Greiner at MPE <jcgrog@mpe.mpg.de> T. Preis (University of Innsbruck) & J. Greiner (MPE Garching) report: The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger 771424081 at 12:27:56 on 12 June 2025 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 is: RA(2000.0) = 226.1 deg Decl.(2000.0) = -28.9 deg The 1 sigma statistical error radius is 2.4 deg. We estimate an additional systematic error of 1 deg. This is consistent in time and position with the Einstein Probe detection of the X-ray transient EP 250612a (GCN 40700). Further details are available at: https://grb.mpe.mpg.de/grb/GRB250612519/ The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB250612519/healpix The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB250612519/json View this GCN Circular online at https://gcn.nasa.gov/circulars/40701. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...