{
  "submittedHow": "email",
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 09:12:58 UT on 4 May 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260504A (trigger 799578783.057988 / 260504384).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 308.8, Dec = 48.4 (J2000 degrees, equivalent to J2000 20h 35m, 48d 23'), with a statistical uncertainty of 5.0 degrees.\n\nThe angle from the Fermi LAT boresight is 44.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260504384/quicklook/glg_skymap_all_bn260504384.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/bn260504384/quicklook/glg_healpix_all_bn260504384.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260504384/quicklook/glg_lc_medres34_bn260504384.gif\n",
  "createdOn": 1777886473528,
  "eventId": "GRB 260504A",
  "subject": "GRB 260504A: Fermi GBM Final Real-time Localization",
  "circularId": 44452
}