{
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "submittedHow": "email",
  "bibcode": "2026GCN.43987....1F",
  "circularId": 43987,
  "subject": "GRB 260313A: Fermi GBM Final Real-time Localization",
  "createdOn": 1773403863637,
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 12:00:28 UT on 13 Mar 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260313A (trigger 795096033.584074 / 260313500).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 53.4, Dec = 33.3 (J2000 degrees, equivalent to J2000 03h 33m, 33d 17'), with a statistical uncertainty of 14.1 degrees.\n\nThe angle from the Fermi LAT boresight is 152.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260313500/quicklook/glg_skymap_all_bn260313500.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/bn260313500/quicklook/glg_healpix_all_bn260313500.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260313500/quicklook/glg_lc_medres34_bn260313500.gif\n",
  "eventId": "GRB 260313A"
}