{
  "bibcode": "2009GCN..9413....1M",
  "body": "Sheila McBreen (UCD/MPE)\nreports on behalf of the Fermi GBM Team:\n\n\"At 03:17:20.17 UT on 16 May 2009, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 090516B (trigger 264136642 / 090516137).\n\nThe on-ground calculated location, using the GBM trigger\ndata, is RA = 122.2, DEC = -71.62 (J2000 degrees,\nequivalent to 08 h 09 m, -71 d 37 '), with an uncertainty\nof 2.6 degrees (radius, 1-sigma containment,\nstatistical only; there is additionally a systematic\nerror which is currently estimated to be 2 to 3 degrees).\nThe angle from the Fermi LAT boresight is 45 degrees.\n\nThe GBM light curve consists of several overlapping\npeaks from the trigger to about 140 s and possible\nweak emission out to about 350 s.\n\nThe time-averaged spectrum from T0 s to T0+138 s is\nadequately fit by a power law function with an exponential\nhigh energy cutoff.  The power law index is -1.01 (+/-0.06) and\nthe cutoff energy, parameterized as Epeak, is\n327.0 (+/-58.7) keV (chi squared 419 for 359 d.o.f.).\n\nThe event fluence (8-1000 keV) in this time interval is\n(3.0 +/- 0.1)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+80 s in the 8-1000 keV band\nis 4.0 +/- 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": 9413,
  "createdOn": 1242839092000,
  "email": "smcbreen@mpe.mpg.de",
  "subject": "GRB 090516B: Fermi GBM detection",
  "submitter": "Sheila McBreen at MPE  <smcbreen@mpe.mpg.de>",
  "eventId": "GRB 090516B"
}