{
  "bibcode": "2009GCN..9301....1B",
  "body": "M. S. Briggs (UAH) reports on behalf of the Fermi GBM Team:\n\n\"At 15:27:00.86  UT on 27 April 2009, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 090427B (trigger 262538822 / 090427644).\n\nThe on-ground calculated location, using the GBM trigger\ndata, is RA = 210.0, DEC = -45.7 (J2000 degrees,\nequivalent to 14 h 00 m, -45 d 42'), with an uncertainty\nof 11.8 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 14 degrees.\n\nThe GBM light curve consists of a single peak\nwith a duration about 7 s (8-1000 keV).\nThe time-averaged spectrum from T0-4.096 s to T0+2.048 s is\nwell fit by a simple power law function with\nindex -1.1 +/- 0.1.\n\nThe event fluence (8-1000 keV) in this time interval is\n(8.0 +/- 0.5)E-7 erg/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 9301,
  "createdOn": 1241036679000,
  "email": "michael.briggs@nasa.gov",
  "subject": "GRB 090427B: Fermi GBM detection",
  "submitter": "Michael S. Briggs at UAH and MSFC  <michael.briggs@nasa.gov>",
  "eventId": "GRB 090427B"
}