{
  "bibcode": "2009GCN..9983....1R",
  "body": "Arne Rau (MPE) reports on behalf of the Fermi GBM Team:\n\n\"At 04:35:45.58 UT on 03 September 2009, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 091003A (trigger 276237347 / 091003191).\n\nThe on-ground calculated location, using the GBM trigger\ndata, is RA = 251.1, DEC = 37.2 (J2000 degrees,\nequivalent to 16h 44m, 37d 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 13 degrees.\n\nThis burst was also independently detected by INTEGRAL SPI-ACS.\n\nThe GBM light curve consists of multiple peaks\nwith a duration (T90) of about 21.1 +/- 0.5s (8-1000 keV).\nThe time-averaged spectrum from T0-0.384s to T0+23.168s is\nbest fit by a Band function with Epeak = 486.2 +/- 23.6 keV,\nalpha = -1.13 +/- 0.01, and beta = -2.64 +/- 0.24\n(chi squared 851 for 611 d.o.f.).\n\nThe event fluence (8-1000 keV) in this time interval is\n(3.76 +/- 0.04)E-05 erg/cm^2. The 1.024-sec peak photon flux measured\nstarting from T0+18.048 s in the 8-1000 keV band\nis 31.8 +/- 0.4 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 9983,
  "createdOn": 1254570128000,
  "email": "arau@mpe.mpg.de",
  "subject": "GRB 091003A: Fermi GBM detection",
  "submitter": "Arne Rau at MPE  <arau@mpe.mpg.de>",
  "eventId": "GRB 091003A"
}