{
  "submittedHow": "email",
  "subject": "GRB 260204B: Fermi GBM Final Real-time Localization",
  "bibcode": "2026GCN.43614....1F",
  "createdOn": 1770224430537,
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 16:50:06 UT on 4 Feb 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260204B (trigger 791916611.958652 / 260204701).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 338.5, Dec = -50.1 (J2000 degrees, equivalent to J2000 22h 33m, -50d 06'), with a statistical uncertainty of 6.4 degrees.\n\nThe angle from the Fermi LAT boresight is 70.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260204701/quicklook/glg_skymap_all_bn260204701.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/2026/bn260204701/quicklook/glg_healpix_all_bn260204701.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260204701/quicklook/glg_lc_medres34_bn260204701.gif\n",
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "circularId": 43614,
  "eventId": "GRB 260204B"
}