{
  "version": 2,
  "eventId": "GRB 261010A",
  "submittedHow": "web",
  "editedOn": 1791770192973,
  "circularId": 45911,
  "eventType": [
    "GRB",
    "Gamma-ray Transient"
  ],
  "format": "text/plain",
  "editedBy": "Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Eva MP at INAOE <eva.palafox@gmail.com>",
  "body": "E. Palafox (INAOE) and A. Jameson (USRA) report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"At 19:17:03.16 UT on 10 October 2026, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 261010A (trigger 813352628/261010804).\nwhich was also detected by Swift BAT (A. Y. Lien et al. 2026, GCN 45889).\nThe Fermi GBM on-ground location is consistent with the Swift BAT position.\n\nThe angle from the Fermi LAT boresight is 22 degrees.\n\nThe GBM light curve consists of a bright emission episode follwed by several lower peaks with a duration (T90)\nof about 54 s (50-300 keV). The time-averaged spectrum\nfrom T0-7.4 to T0+54.0 s is best fit by\na power law function with an exponential high-energy cutoff.\nThe power law index is -1.30 +/- 0.05 and the cutoff energy,\nparameterized as Epeak, is 450 +/- 90 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(1.70 +/- 0.05)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+4.2 s in the 10-1000 keV band is 8.2 +/- 0.3 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog:\nhttps://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html\n\nFor Fermi GBM data and info, please visit the official Fermi GBM Support Page:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"",
  "createdOn": 1791755268959,
  "subject": "GRB 261010A: Fermi GBM Observation",
  "submitter": "Eva MP at INAOE <eva.palafox@gmail.com>"
}