{
  "bibcode": "2009GCN..9040....1V",
  "body": "A. von Kienlin (MPE) reports on behalf of the Fermi GBM Team: \n\n\"At 09:41:41.51 UT on 27 March 2009, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 090327 (trigger 259839703 / 090327404).\nThe on-ground calculated location, using the GBM trigger \ndata, is RA = 29.5, DEC = -41.6 (J2000 degrees,\nequivalent to 01h 58m, -41d 36'), with an uncertainty \nof  3.4 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 66 degrees.\n\nThe GBM light curve consists of single peak\nwith a duration (T90) of about 24 s (8-1000 keV). \nThe time-averaged spectrum from T0 to T0+16.384 s is  \nwell fit by a power law function with an exponential\nhigh energy cutoff.  The power law index is -0.50 +/- 0.12 and\nthe cutoff energy, parameterized as Epeak, is 96.4 +/- 5.1 keV\n(chi squared 550 for 475 d.o.f.).\n\nThe event fluence (8-1000 keV) in this time interval is \n(3.0 +/- 0.4)E-06 erg/cm^2. The 1-sec peak photon flux measured \nstarting from T0+9.216 s in the 8-1000 keV band \nis 3.5 +/- 0.7  ph/s/cm^2.\n\nA Band function fits the spectrum equally well (chi squared 549 \nfor 474 d.o.f.) with Epeak= 89.7 +/- 7.0  keV, \nalpha = -0.39 +/- 0.16 and beta = -2.90 +/- 0.45. \n\nThe spectral analysis results presented above are preliminary; \nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 9040,
  "createdOn": 1238171550000,
  "email": "azk@mpe.mpg.de",
  "subject": "GRB 090327: Fermi GBM detection",
  "submitter": "Andreas von Kienlin at MPE  <azk@mpe.mpg.de>",
  "eventId": "GRB 090327"
}