{
  "bibcode": "2026GCN.44979....1F",
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 16:55:04 UT on 18 Jun 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260618B (trigger 803494509.712104 / 260618705).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 351.1, Dec = -44.1 (J2000 degrees, equivalent to J2000 23h 24m, -44d 06'), with a statistical uncertainty of 1.8 degrees.\n\nThe angle from the Fermi LAT boresight is 18.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260618705/quicklook/glg_skymap_all_bn260618705.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/bn260618705/quicklook/glg_healpix_all_bn260618705.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260618705/quicklook/glg_lc_medres34_bn260618705.gif\n",
  "circularId": 44979,
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "subject": "GRB 260618B: Fermi GBM Final Real-time Localization",
  "createdOn": 1781802450768,
  "eventId": "GRB 260618B",
  "submittedHow": "email"
}