{
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "circularId": 45888,
  "subject": "GRB 261010A: Fermi GBM Final Real-time Localization",
  "createdOn": 1791660461542,
  "eventId": "GRB 261010A",
  "submittedHow": "email",
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 19:17:03 UT on 10 Oct 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 261010A (trigger 813352628.162212 / 261010804).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 244.7, Dec = 27.6 (J2000 degrees, equivalent to J2000 16h 18m, 27d 36'), with a statistical uncertainty of 3.3 degrees.\n\nThe angle from the Fermi LAT boresight is 25.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn261010804/quicklook/glg_skymap_all_bn261010804.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/bn261010804/quicklook/glg_healpix_all_bn261010804.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn261010804/quicklook/glg_lc_medres34_bn261010804.gif\n"
}