{
  "bibcode": "2015GCN.18358....1R",
  "body": "O.J. Roberts (UCD), A. von Kienlin (MPE) and\nC. Meegan (UAH),report on behalf of the Fermi GBM Team:\n\n\"At 05:37:29.08 UT on 22 September 2015, the Fermi\nGamma-Ray Burst Monitor triggered and located\nGRB 150922A (trigger 464593053 / 150922234), which was\nalso detected by IPN (Svinkin et al. 2015, GCN 18357).\nThe GBM on-ground location is consistent with the IPN\nposition. The angle from the Fermi LAT boresight is\nabout 38 degrees.\n\nThe GBM light curve shows a short burst with a\nduration (T90) of 0.144 s (50-300 keV). The time-averaged\nspectrum from T0-0.016 to T0+0.128 s is best fit by a\npower law function with an exponential high-energy cutoff.\nThe power law index is -0.55 +/- 0.11 and the cutoff energy,\nparameterized as Epeak, is 625 +/- 97  keV.\n\nThe event fluence (10-1000 keV) in this time interval\nis (8.0 +/- 0.4) E-07 erg/cm^2. The 64 ms peak photon\nflux measured starting from T0-0.016 s in the 10-1000 keV\nband is 23.0 +/- 1.3 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 18358,
  "createdOn": 1442999045000,
  "email": "oliver.roberts@ucd.ie",
  "subject": "GRB 150922A: Fermi GBM observation",
  "submitter": "Oliver Roberts at UCD/Fermi  <oliver.roberts@ucd.ie>",
  "eventId": "GRB 150922A"
}