{
  "bibcode": "2009GCN..9056....1G",
  "body": "A. Goldstein (UAH) reports on behalf of the Fermi GBM Team: \n\n\"At 17:07:04.94 UT on 28 March 2009, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 090328B (trigger 259952826 / 090328713).\nThe Fermi Observatory executed a maneuver following this trigger and \ntracked the burst location for the next 5 hours, subject to \nEarth-angle constraints.\n\nThe on-ground calculated location, using the GBM trigger \ndata, is RA = 155.72, DEC = +33.40 (J2000 degrees, \nequivalent to 10h 23m, 33d 24'), with an uncertainty \nof 7.94 degrees (radius, 1-sigma containment, \nstatistical only; there is additionally a systematic\nerror which is currently estimated to be 2 to 3 degrees).\nThe angle from the Fermi LAT boresight is 74 degrees.\n\nThe GBM light curve consists of a single bright peak\nwith a duration (T90) of about 0.32 s (8-1000 keV). \nThe time-averaged spectrum from T0-0.13 s to T0+0.13 s is \nwell fit by a Band function with Epeak = 1967.0 +/- 701.0 keV, \nalpha = -0.92 +/- 0.06, and beta = -2.48 +/- 0.66\n(chi squared 452.6 for 482 d.o.f.).\n\nThe event fluence (8-1000 keV) in this time interval is \n(9.61 +/- 0.31)E-07 erg/cm^2. The 0.064-sec peak photon flux measured \nstarting from T0+0.0 s in the 8-1000 keV band \nis 29.83 +/- 2.38 ph/s/cm^2. \n\nThe spectral analysis results presented above are preliminary; \nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 9056,
  "createdOn": 1238436360000,
  "email": "adam.m.goldstein@msfc.nasa.gov",
  "subject": "GRB 090328B: Fermi GBM Detection",
  "submitter": "Adam Goldstein at Fermi-GBM/UAH  <adam.m.goldstein@msfc.nasa.gov>",
  "eventId": "GRB 090328B"
}