{
  "subject": "GRB 250309B: BALROG localization (Fermi Trigger 763198715 / GRB 250309318)",
  "body": "T. Preis (University of Innsbruck) & J. Greiner (MPE Garching) report:\n\nThe public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger\n763198715 at 07:38:30 on 09 March 2025 were automatically fitted for spectrum\nand sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427;\nBerlato et al. 2019, ApJ 873, 60).\n\nThe best-fit position is:\nRA(2000.0) = 210.5 deg\nDecl.(2000.0) = -7.6 deg\nThe 1 sigma statistical error radius is 1.3 deg.\nWe estimate an additional systematic error of 1 deg.\n\nFurther details are available at:\nhttps://grb.mpe.mpg.de/grb/GRB250309318/\n\nThe Healpix map can be downloaded from:\nhttps://grb.mpe.mpg.de/grb/GRB250309318/healpix\n\nThe location parameters are available as JSON at:\nhttps://grb.mpe.mpg.de/grb/GRB250309318/json\n\n                        \n",
  "submittedHow": "email",
  "circularId": 39629,
  "createdOn": 1741507499826,
  "bibcode": "2025GCN.39629....1P",
  "submitter": "Jochen Greiner at MPE <jcgrog@mpe.mpg.de>",
  "eventId": "GRB 250309B"
}