{
  "circularId": 46075,
  "body": "The Fermi GBM team reports the detection of a likely SHORT GRB\n\nAt 02:24:10 UT on 29 Oct 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 261029B (trigger 814933455.723852 / 261029100).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 48.5, Dec = 4.3 (J2000 degrees, equivalent to J2000 03h 14m, 4d 17'), with a statistical uncertainty of 9.4 degrees.\n\nThe angle from the Fermi LAT boresight is 71.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn261029100/quicklook/glg_skymap_all_bn261029100.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/bn261029100/quicklook/glg_healpix_all_bn261029100.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn261029100/quicklook/glg_lc_medres34_bn261029100.gif\n",
  "eventId": "GRB 261029B",
  "submittedHow": "email",
  "subject": "GRB 261029B: Fermi GBM Final Real-time Localization",
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "createdOn": 1793241291803
}