{
  "bibcode": "2017GCN.20633....1R",
  "body": "O.J. Roberts (USRA/NASA) and C. Meegan (UAH) report on \nbehalf of the Fermi GBM Team:\n\n\"At 18:11:16.40 UT on the 8th of February 2017, the Fermi\nGamma-Ray Burst Monitor triggered and located GRB 170208A\n(trigger 508270281 / 170208758), which was also detected by \nSwift (A. Cholden-Brown et al. 2017, GCN 20631). The GBM \non-ground location is consistent with the Swift position.\n\nThe angle from the Fermi LAT boresight at the GBM trigger\ntime using the Swift-XRT position is 117 degrees.\n\nThis burst was also independently detected by INTEGRAL SPI-ACS.\n\nThe GBM light curve consists of a long GRB with several\nepisodes of bright emission over a duration (T90) of about\n7 s (50-300 keV). The time-averaged spectrum from T0+0 s\nto T0+7.2 s is best fit by a power law function with an \nexponential high-energy cutoff.  The power law index is \n-0.92 +/- 0.09 and the cutoff energy, parameterized as Epeak \nis 246.9 +/- 30.5 keV\n\nThe event fluence (10-1000 keV) in this time interval is \n(3.10 +/- 0.19)E-06 erg/cm^2. The 1-sec peak photon flux\nmeasured starting from T0-0.13 s in the 10-1000 keV band\nis 8.1 +/- 0.4 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 20633,
  "createdOn": 1486598714000,
  "email": "oliver.roberts@nasa.gov",
  "subject": "GRB 170208A: Fermi GBM Detection",
  "submitter": "Oliver J Roberts at USRA/NASA  <oliver.roberts@nasa.gov>",
  "eventId": "GRB 170208A"
}