{
  "submittedHow": "email",
  "createdOn": 1792609420913,
  "circularId": 46007,
  "subject": "GRB 261021A: Fermi GBM Final Real-time Localization",
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 18:53:09 UT on 21 Oct 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 261021A (trigger 814301594.113176 / 261021787).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 245.7, Dec = 42.9 (J2000 degrees, equivalent to J2000 16h 22m, 42d 53'), with a statistical uncertainty of 6.1 degrees.\n\nThe angle from the Fermi LAT boresight is 119.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn261021787/quicklook/glg_skymap_all_bn261021787.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/bn261021787/quicklook/glg_healpix_all_bn261021787.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn261021787/quicklook/glg_lc_medres34_bn261021787.gif\n",
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "eventId": "GRB 261021A"
}