{
  "bibcode": "2009GCN..9230....1C",
  "body": "Valerie Connaughton (UAH) reports on behalf of the Fermi GBM Team:\n\n\"At 14:08:12.67 UT on 24 April 2009, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 090424 (trigger 262275130 / 090424592).\nwhich was also detected by the Swift-BAT\n(J. Cannizzo et al. 2009, GCN 9223).\nThe GBM on-ground location is consistent with the Swift position.\nThe angle from the Fermi LAT boresight is 71 degrees, increasing\nafter trigger time.\n\nThe GBM light curve shows an intense, multi-peaked\nemission period lasting around 6 sec, tailing off\ninto smaller peaks until about 20 sec after trigger time,\nfollowed by a smaller peak between 45-60 sec after the trigger.  \nThe duration (T90) between 8 and 1000 keV is about 52 sec.\n \nThe time-averaged spectrum of the peak from T0-0.3 s to T0+5.5 s is\nbest fit by a Band function with Epeak = 177 +/- 3 keV,\nalpha = 0.90 +/- 0.02, and beta = -2.9 +/- 0.1\n\nThe event fluence (8-1000 keV) over the entire event (-0.3 s to 59 s) is\n(5.2 +/- 0.1)E-05 erg/cm^2. The 0.128-sec peak photon flux measured\nat 1.4 s in the 8-1000 keV band is 137 +/- 5 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 9230,
  "createdOn": 1240595184000,
  "email": "valerie@nasa.gov",
  "subject": "GRB 090424: Fermi GBM Observation",
  "submitter": "Valerie Connaughton at MSFC  <valerie@nasa.gov>",
  "eventId": "GRB 090424"
}