{
  "bibcode": "2009GCN..9562....1G",
  "body": "A. Goldstein (UAH) and J.M. Burgess (UAH) \nreport on behalf of the Fermi GBM Team: \n\n\"At 22:07:25.70 UT on 21 June 2009, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 090621B (trigger 267314847 / 090621922)\nwhich was also detected by the Swift BAT (P.A. Curran et al. 2009, \nGCN 9545). The GBM on-ground location is consistent with the \nSwift position.  The angle from the Fermi LAT boresight \nis 108 degrees.\n\nThe GBM light curve consists of one short spike\nwith a duration (T90) of about 0.128 s (8-1000 keV). \nThe time-averaged spectrum from T0-0.064 s to T0+0.064 s is \nbest fit by a Band function with Epeak = 321.60 +/- 129.00 keV, \nalpha = -0.13 +/- 0.38, and beta = -1.57 +/- 0.08\n(chi squared 401 for 481 d.o.f.).\n\nThe event fluence (8-1000 keV) in this time interval is \n(3.71 +/- 0.58)E-07 erg/cm^2. The 0.128-sec peak photon flux measured \nstarting from T0-0.064 s in the 8-1000 keV band \nis 6.4 +/- 1.4 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary; \nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 9562,
  "createdOn": 1245715391000,
  "email": "adam.m.goldstein@msfc.nasa.gov",
  "subject": "GRB 090621B: Fermi GBM detection",
  "submitter": "Adam Goldstein at Fermi-GBM/UAH  <adam.m.goldstein@msfc.nasa.gov>",
  "eventId": "GRB 090621B"
}