{
  "createdOn": 1768408366298,
  "eventId": "GRB 260114A",
  "circularId": 43400,
  "bibcode": "2026GCN.43400....1B",
  "submittedHow": "web",
  "subject": "GRB 260114A: Fermi GBM observation",
  "submitter": "Elisabetta Bissaldi at Politecnico and INFN Bari <elisabetta.bissaldi@ba.infn.it>",
  "body": "E. Bissaldi (Politecnico and INFN Bari)\nreports on behalf of the Fermi GBM Team:\n\n\n\"At 11:40:26.31 UT on 14 January 2026, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 260114A (trigger 790083631 / 260114486),\nwhich was also detected by the Swift/BAT (Eyles-Ferris et al. 2026, GCN 43396).\nThe GBM on-ground location is consistent with the Swift position.\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 70 degrees.\n\nThe GBM light curve consists of a bright emission episode\nwith a duration (T90) of about 320 ms (50-300 keV).\nThe time-averaged spectrum from T0-0.064 s to T0+0.384 s is\nbest fit by a power law function with an exponential\nhigh-energy cutoff. The power law index is -0.07 +/- 0.06 and\nthe cutoff energy, parameterized as Epeak, is 583 +/- 25 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(4.87 +/- 0.12)E-06 erg/cm^2. The 64-ms peak photon flux measured\nstarting from T0+0.064 s in the 10-1000 keV band\nis 35.9 +/- 1.4 ph/s/cm^2.\n\nA Band function fits the spectrum equally well \nwith Epeak = 575 +/- 29 keV, alpha = -0.06 +/- 0.06, and beta = -3.5 +/- 0.6.\n\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/\"",
  "format": "text/plain"
}