{
  "bibcode": "2009GCN..9390....1W",
  "body": "Colleen A. Wilson-Hodge (NASA/MSFC)\nreports on behalf of the Fermi GBM Team:\n\n\"At 21:58:47.92 UT on 13 May 2009, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 090513 (trigger 263944729 / 090513.916).\n\nThe on-ground calculated location, using the GBM trigger\ndata, is RA = 269.8, DEC = -31.6 (J2000 degrees,\nequivalent to 17 h 59 m, -31 d 36'), with an uncertainty\nof 4.6 degrees (radius, 1-sigma containment,\nstatistical only; there is additionally a systematic\nerror which is currently estimated to be 2 to 3 degrees).\n \nThe angle from the Fermi LAT boresight is 89 degrees.\n\nThe GBM light curve shows a broad peak\nwith a duration (T90) of about 23 s (8-1000 keV).\nThe time-averaged spectrum from T0-1 s to T0+19 s is\nadequately fit by a power law function with an exponential\nhigh energy cutoff.  The power law index is -0.9 +/- 0.1 and\nthe cutoff energy, parameterized as Epeak, is 850 +/- 390 keV\n\nThe event fluence (8-1000 keV) in this time interval is\n(6.8 +/- 0.4)E-06 erg/cm^2. The 1 s peak photon flux measured\nstarting from T0+5.1 s in the 8-1000 keV band\nis 2.7 +/- 0.2 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 9390,
  "createdOn": 1242648388000,
  "email": "colleen.wilson@nasa.gov",
  "subject": "GRB090513: Fermi GBM detection",
  "submitter": "Colleen A. Wilson at NASA/MSFC/NSSTC  <colleen.wilson@nasa.gov>",
  "eventId": "GRB 090513"
}