{
  "bibcode": "2008GCN..8290....1V",
  "body": "A. von Kienlin (MPE), E. Bissaldi (MPE), S. McBreen (MPE) \nreport on behalf of the Fermi GBM Team: \n\n\"At 06:25:48 UT on 20 September 2008, the Fermi Gamma-ray Burst Monitor\ntriggered and located GRB 080920 (trigger 243584749 / 080920268). \nThe on-ground calculated location using the Fermi GBM trigger data is \nRA = 124.6, Dec = 1.6 (equivalent to J2000 08h 18m, 01d 36'), \nwith a statistical uncertainty of 3.4  degrees \n(radius, 1-sigma containment; there is additionally a systematic \nerror which is currently estimated to be 2 to 3 degrees). \nThe angle from the Fermi LAT boresight is 16 degrees.\n\nThis long GRB comprises one FRED like pulse, starting at T0-6 s.\nT90 (25-1000 keV) is about 85 s. The time-averaged spectrum \nfrom T0-6 to T0+79 s is adequately fit by a power law model \nwith index -1.42 +/- 0.06. It can also be fit with a power \nlaw function with an exponential high energy cutoff. \nThe cutoff energy, parameterized as Epeak, is 162 +/- 35 keV. \nIn this case the power law index is poorly constrained (-0.63 +/- 0.25).\n\n\nThe fluence in the 25-1000 keV band is 2.4 (+/- 0.5) E-06 erg/cm2 \nand the peak flux (25-1000 keV) on the 1 s timescale\nis 1.29 (+/- 0.14) ph/cm2/s.  \n\nThe spectral analysis results presented above are preliminary; \nfinal results will be published in the Fermi GBM GRB Catalog.\"",
  "circularId": 8290,
  "createdOn": 1222350936000,
  "email": "azk@mpe.mpg.de",
  "subject": "GRB 080920: Fermi GBM detection",
  "submitter": "Andreas von Kienlin at MPE  <azk@mpe.mpg.de>",
  "eventId": "GRB 080920"
}