{
  "eventId": "GRB 260516C",
  "submittedHow": "email",
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 19:34:38 UT on 16 May 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260516C (trigger 800652883.931176 / 260516816).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 172.6, Dec = -59.9 (J2000 degrees, equivalent to J2000 11h 30m, -59d 53'), with a statistical uncertainty of 3.2 degrees.\n\nThe angle from the Fermi LAT boresight is 36.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260516816/quicklook/glg_skymap_all_bn260516816.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/bn260516816/quicklook/glg_healpix_all_bn260516816.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260516816/quicklook/glg_lc_medres34_bn260516816.gif\n",
  "circularId": 44648,
  "subject": "GRB 260516C: Fermi GBM Final Real-time Localization",
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "bibcode": "2026GCN.44648....1F",
  "createdOn": 1778960710989
}