{
  "bibcode": "2026GCN.44279....1P",
  "submittedHow": "web",
  "body": "E. Palafox (INAOE) and U. Pathak (IIT Bombay) report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"At 06:13:46.17 UT on 12 April 2026, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 260412A (trigger 797667231/260412260).\nwhich was also detected by SVOM/ECLAIRs (Wang et al. 2026, GCN 44276).\nThe Fermi GBM on-ground location is consistent with the SVOM/ECLAIRs position.\n\nThe angle from the Fermi LAT boresight is 35 degrees.\n\nThe GBM light curve consists of a bright emission episode with multiple peaks with a duration (T90)\nof about 80 s (50-300 keV). The time-averaged spectrum\nfrom T0-19 to T0+60 s is best fit by\na power law function with an exponential high-energy cutoff.\nThe power law index is -1.28 +/- 0.07 and the cutoff energy,\nparameterized as Epeak, is 210 +/- 30 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(7.9 +/- 0.5)E-06 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+22 s in the 10-1000 keV band is 3 +/- 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/\"",
  "subject": "GRB 260412A: Fermi GBM Observation",
  "eventId": "GRB 260412A",
  "format": "text/plain",
  "submitter": "Eva MP at INAOE <eva.palafox@gmail.com>",
  "circularId": 44279,
  "createdOn": 1776031096360
}