{
  "bibcode": "2009GCN.10018....1V",
  "body": "A. von Kienlin, E. Bissaldi and D. Gruber (all MPE)\nreport on behalf of the Fermi GBM Team:\n\n\n\"At 02:43:09.32 UT on 10 October 2009, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 091010 (trigger 276835391 / 091010113),\nwhich was also detected by SuperAGILE (Donnarumma et al., GCN 10004).\nThe GBM on-ground location is consistent with the Swift-XRT position\n(Margutti et al. 2009, GCN 10006 and Evans et al. 2009, GCN 10012).\n\nThe angle from the Fermi LAT boresight is 55.7 degrees.\nMoreover, this burst was bright enough to result in\na Fermi spacecraft repointing maneuver.\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 8.1 +/- 0.5 s (8-1000 keV).\nThe time-averaged spectrum from T0-0.128 s to T0+8.064 s is\nbest fit by a power law function with an exponential\nhigh energy cutoff. The power law index is -1.11 +/- 0.03 and\nthe cutoff energy, parameterized as Epeak, is 150 (+6/-5) keV\n(C-stat 446 for 359 d.o.f.).\n\nThe event fluence (8-1000 keV) in this time interval is\n(1.09 +/- 0.02)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+1.9 s in the 8-1000 keV band\nis 40.9 +/- 0.5 ph/s/cm^2.\n\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 10018,
  "createdOn": 1255359912000,
  "email": "dgruber@mpe.mpg.de",
  "subject": "GRB 091010: Fermi GBM observation",
  "submitter": "David Gruber at MPE  <dgruber@mpe.mpg.de>",
  "eventId": "GRB 091010"
}