{
  "bibcode": "2017GCN.20533....1B",
  "body": "E. Bissaldi (Politecnico & INFN Bari)\nreports on behalf of the Fermi GBM Team:\n\n\n\"At 11:30:41.54 UT on 26 January 2017, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 170126A (trigger 507123046 / 170126480),\nwhich was also detected by the Swift/BAT (Kocevski et al. 2017, GCN 20530).\nThe GBM on-ground location is consistent with the Swift position.\n\nThe trigger resulted in an Autonomous Repoint Request (ARR)\nby the GBM Flight Software owing to the high peak flux\nof the GRB. This ARR was accepted and the spacecraft slewed\nto the GBM in-flight location. The initial angle from the\nFermi-LAT boresight to the BAT location is 46 degrees.\n\nThe GBM light curve consists of a single peak\nwith a duration (T90) of about 14 s (50-300 keV).\nThe time-averaged spectrum from T0 to T0+14 s is\nadequately fit by a power law function with an exponential\nhigh-energy cutoff. The power law index is -1.13 +/- 0.04 and\nthe cutoff energy, parameterized as Epeak, is 260 +/- 21 keV.\nA Band function fits the spectrum equally well\nwith Epeak = 187 +/- 23 keV, alpha = -1.02 +/- 0.06 and\nbeta = -2.08 +/- 0.11.\n\nThe event fluence (10-1000 keV) in this time interval is\n(9.5 +/- 0.3)E-06 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+1 s in the 10-1000 keV band\nis 12.3 +/- 0.4 ph/s/cm^2.\n\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 20533,
  "createdOn": 1485457213000,
  "email": "Elisabetta.Bissaldi@uibk.ac.at",
  "subject": "GRB 170126A: Fermi GBM observation",
  "submitter": "Elisabetta Bissaldi at U.Innsbruk/IAPP  <Elisabetta.Bissaldi@uibk.ac.at>",
  "eventId": "GRB 170126A"
}