{
  "subject": "GRB 260718A: Fermi GBM Observation",
  "submittedHow": "web",
  "eventId": "GRB 260718A",
  "format": "text/plain",
  "bibcode": "2026GCN.45181....1H",
  "body": "A. Holzmann Airasca (UniTrento and INFN Bari) reports on behalf of the Fermi Gamma-ray Burst Monitor Team:\n\n\"At 11:16:35.01 UT on 18 July 2026, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 260718A (trigger 806066200/260718470),\nwhich was also detected by SVOM/ECLAIRs (S. Antier et al. 2026, GCN 45177).\nThe Fermi GBM on-ground location is consistent with the SVOM/ECLAIRs position.\n\nThe angle from the Fermi LAT boresight is 31 degrees.\n\nThe GBM light curve consists of a single emission episode with a duration (T90)\nof about 19 s (50-300 keV). The time-averaged spectrum\nfrom T0-3.8 to T0+16.3 s is best fit by\na power law function with an exponential high-energy cutoff.\nThe power law index is -1.29 +/- 0.05 and the cutoff energy,\nparameterized as Epeak, is 68 +/- 3 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(6.8 +/- 0.6)E-07 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0-2.4 s in the 10-1000 keV band is 2.1 +/- 0.2 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/\"",
  "circularId": 45181,
  "createdOn": 1784395441173,
  "submitter": "A. Holzmann Airasca at University of Trento and INFN Bari <a.holzmannairasca@unitn.it>"
}