{
  "eventId": "GRB 250920B",
  "createdOn": 1758358606466,
  "circularId": 41897,
  "submittedHow": "email",
  "bibcode": "2025GCN.41897....1F",
  "subject": "GRB 250920B: Fermi GBM Final Real-time Localization",
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 08:46:26 UT on 20 Sep 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250920B (trigger 780050791.161292 / 250920366).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 190.8, Dec = 47.4 (J2000 degrees, equivalent to J2000 12h 43m, 47d 23'), with a statistical uncertainty of 2.4 degrees.\n\nThe angle from the Fermi LAT boresight is 56.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250920366/quicklook/glg_skymap_all_bn250920366.png\n\nThe HEALPix FITS file, including the estimated localization systematic, can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250920366/quicklook/glg_healpix_all_bn250920366.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250920366/quicklook/glg_lc_medres34_bn250920366.gif\n",
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>"
}