{
  "bibcode": "2009GCN..9428....1B",
  "body": "P. N. Bhat (UAH)\nreport on behalf of the Fermi GBM Team:\n\n\"At 20:23:19.31 UT on 20 May 2009, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 090520C (trigger 264543801 / 090520850).\n\nThe on-ground calculated location, using the GBM trigger\ndata, is RA = 111.2, DEC = -19.7 (J2000 degrees,\nequivalent to 07 h 24.8 m, -19 d 42'), with an uncertainty\nof 1.2 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 71 degrees.\n\nThe GBM light curve consists of single peak\nwith a duration (T90) of about 4.9 s (10-1000 keV).\nThe time-averaged spectrum from T0-0.512 s to T0+3.968 s is\nadequately fit by a Band function with Epeak = 204.2 +/- 27.9 keV,\nalpha = -0.73 +/- 0.09, and beta = -1.96 +/- 0.10\n\n(chi squared 400.9for 362 d.o.f.).\n\nThe event fluence (8-1000 keV) in this time interval is\n(3.54 +/- 0.25)E-06 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+0.872 s in the 8-1000 keV band\nis 4.47 +/- 0.32 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 9428,
  "createdOn": 1243517522000,
  "email": "Narayana.Bhat@nasa.gov",
  "subject": "GRB 090520C: Fermi GBM detection",
  "submitter": "Narayana Bhat at U Alabama/Huntsville/GBM  <Narayana.Bhat@nasa.gov>",
  "eventId": "GRB 090520C"
}