{
  "subject": "GRB 261030B: Fermi GBM Final Real-time Localization",
  "submittedHow": "email",
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "circularId": 46118,
  "eventId": "GRB 261030B",
  "createdOn": 1793397240523,
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 21:43:27 UT on 30 Oct 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 261030B (trigger 815089412.659158 / 261030905).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 101.4, Dec = -52.8 (J2000 degrees, equivalent to J2000 06h 45m, -52d 47'), with a statistical uncertainty of 5.8 degrees.\n\nThe angle from the Fermi LAT boresight is 24.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn261030905/quicklook/glg_skymap_all_bn261030905.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/bn261030905/quicklook/glg_healpix_all_bn261030905.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn261030905/quicklook/glg_lc_medres34_bn261030905.gif\n"
}