{
  "bibcode": "2009GCN..9661....1V",
  "body": "A.J. van der Horst (NASA/MSFC/ORAU) reports on behalf of the Fermi GBM Team:\n\n\"At 00:29:28.06 UT on 13 July 2009, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 090713 (trigger 269137770 / 090713020).\nThe on-ground calculated location, using the GBM trigger data, is\nRA = 284.8, Dec = -3.3 (J2000 degrees, equivalent to 18h59m, -3d20'),\nwith an uncertainty of 2.4 degrees (radius, 1-sigma containment,\nstatistical only; there is additionally a systematic error which is\ncurrently estimated to be 2 to 3 degrees).\nThe angle from the Fermi LAT boresight is 63 degrees.\n\nThe GBM light curve consists of multiple peaks with a duration (T90)\nof about 113 s (8-1000 keV).\nThe time-averaged spectrum from T0-4.1 s to T0+55.3 s is well fit by\na power law function with an exponential high energy cutoff. The\npower-law index is -0.34 +/- 0.12 and the cutoff energy, parameterized\nas Epeak, is 99 +/- 5 keV (chi squared 339 for 359 d.o.f.).\n\nThe event fluence (8-1000 keV) in this time interval is (3.7 +/- 0.4)E-6\nerg/cm^2. The 1-sec peak photon flux measured starting from T0+24.6 s\nin the 8-1000 keV band is 1.6 +/- 0.2 ph/s/cm^2.\n\nThe temporal and spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 9661,
  "createdOn": 1247498447000,
  "email": "Alexander.J.VanDerHorst@nasa.gov",
  "subject": "GRB 090713: Fermi GBM detection",
  "submitter": "Alexander van der Horst at NASA/MSFC  <Alexander.J.VanDerHorst@nasa.gov>",
  "eventId": "GRB 090713"
}