{
  "bibcode": "2009GCN..9554....1R",
  "body": "Arne Rau (MPE) reports on behalf of the Fermi GBM Team:\n\n\"At 09:36:23.47 UT on 20 June 2009, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 090620 (trigger 267183385 / 090620400).\n\nThe on-ground calculated location, using the GBM trigger\ndata, is RA = 237.4 deg, DEC = 61.2 deg (J2000 degrees,\nequivalent to 15 h 50 m, 61 d 12 '), with an uncertainty\nof 1.0 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 60 degrees.\n\nThis burst was also independently detected by INTEGRAL SPI-ACS.\n\nThe GBM light curve shows a single peak\nwith a duration (T90) of about 16.5 s (8-1000 keV).\nThe time-averaged spectrum from T0-0.003 s to T0+16.640 s is\nbest fit by a Band function with Epeak = 156 +/- 6 keV,\nalpha = -0.40 +/- 0.04, and beta = -2.44 +/- 0.10\n(chi squared 576 for 532 d.o.f.).\n\nThe event fluence (8-1000 keV) in this time interval is\n(6.6 +/- 0.2)E-06 erg/cm^2. The 1.024-sec peak photon flux measured\nstarting from T0+4.352 s in the 8-1000 keV band\nis 7.0 +/- 0.3 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 9554,
  "createdOn": 1245683502000,
  "email": "arau@mpe.mpg.de",
  "subject": "GRB 090620: Fermi GBM detecion",
  "submitter": "Arne Rau at MPE  <arau@mpe.mpg.de>",
  "eventId": "GRB 090620"
}