{
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "createdOn": 1779565000817,
  "body": "The Fermi GBM team reports the detection of a likely SHORT GRB\n\nAt 19:26:02 UT on 23 May 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260523B (trigger 801257167.544222 / 260523810).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 34.1, Dec = -63.1 (J2000 degrees, equivalent to J2000 02h 16m, -63d 06'), with a statistical uncertainty of 3.1 degrees.\n\nThe angle from the Fermi LAT boresight is 121.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260523810/quicklook/glg_skymap_all_bn260523810.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/bn260523810/quicklook/glg_healpix_all_bn260523810.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260523810/quicklook/glg_lc_medres34_bn260523810.gif\n",
  "bibcode": "2026GCN.44699....1F",
  "submittedHow": "email",
  "circularId": 44699,
  "eventId": "GRB 260523B",
  "subject": "GRB 260523B: Fermi GBM Final Real-time Localization"
}