{
  "bibcode": "2026GCN.44331....1F",
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 15:43:55 UT on 17 Apr 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260417B (trigger 798133440.23068 / 260417655).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 264.8, Dec = -27.4 (J2000 degrees, equivalent to J2000 17h 39m, -27d 23'), with a statistical uncertainty of 8.4 degrees.\n\nThe angle from the Fermi LAT boresight is 29.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260417655/quicklook/glg_skymap_all_bn260417655.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/bn260417655/quicklook/glg_healpix_all_bn260417655.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260417655/quicklook/glg_lc_medres34_bn260417655.gif\n",
  "subject": "GRB 260417B: Fermi GBM Final Real-time Localization",
  "createdOn": 1776441269539,
  "eventId": "GRB 260417B",
  "submittedHow": "email",
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "circularId": 44331
}