{
  "bibcode": "2008GCN..8280....1P",
  "body": "Bill Paciesas (UAH), Alexander van der Horst (NASA/MSFC) and Adam Goldstein\n(UAH), report on behalf of the Fermi Gamma-ray Burst Monitor Team:\n\n\"At 17:38:31 UT on 13 September 2008, the Fermi Gamma-Ray Burst Monitor\n(GBM) triggered and located GRB 080913B (trigger 243020312 / 080913.735).\nThe on-ground calculated location, using the GBM trigger data,\nis RA = 46.3, Dec = -4.6 (J2000 degrees) (equivalent to J2000 3h 05m,\n-4d 36'), with an uncertainty of 3.3 degrees (radius, 1-sigma containment,\nstatistical only; there is additionally a systematic error which is\ncurrently estimated to be 2 to 3 degrees).  The angle from the Large Area\nTelescope (LAT) boresight is 71 degrees.\n\nThis GRB was about 140 s long consisting of several peaks with a main\nemission period of 30 seconds.  The time-averaged spectrum from T-2 to T+28 s \nis best fit by a power law with exponential cut-off,\nwith a power-law index of -0.69 +/- 0.16 and a cut-off energy, parameterized as \nEpeak, of 114 +/- 14 keV. The fluence between 50 and 300 keV over these 30 seconds \nis (2.2 +/- 0.5) x 10^-6 erg/cm^2.\n\nThe spectral analysis results presented above are preliminary; the final\nresults will be published in the GBM GRB Catalog.\"",
  "circularId": 8280,
  "createdOn": 1222011140000,
  "email": "bill.paciesas@nasa.gov",
  "subject": "GRB 080913B:  Fermi GBM detection",
  "submitter": "Bill Paciesas at UAH  <bill.paciesas@nasa.gov>",
  "eventId": "GRB 080913B"
}