{
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "circularId": 44299,
  "subject": "GRB 260415A: Fermi GBM Final Real-time Localization",
  "createdOn": 1776228880931,
  "bibcode": "2026GCN.44299....1F",
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 04:43:59 UT on 15 Apr 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260415A (trigger 797921044.314306 / 260415197).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 58.5, Dec = -24.0 (J2000 degrees, equivalent to J2000 03h 53m, -24d 00'), with a statistical uncertainty of 5.5 degrees.\n\nThe angle from the Fermi LAT boresight is 92.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260415197/quicklook/glg_skymap_all_bn260415197.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/bn260415197/quicklook/glg_healpix_all_bn260415197.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260415197/quicklook/glg_lc_medres34_bn260415197.gif\n",
  "submittedHow": "email",
  "eventId": "GRB 260415A"
}