{
  "bibcode": "2009GCN..9856....1W",
  "body": "Colleen A. Wilson-Hodge (NASA/MSFC)reports on behalf of the Fermi GBM Team:\n\n\"At 16:50:40.13 UT on 29 August 2009, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 090829B (trigger 273257442 / 090829702).\n\nThe on-ground calculated location, using the GBM trigger data, is\nRA = 355.0, DEC = -9.4 (J2000 degrees, equivalent to 23 h 40 m, -9 d 22'),\nwith an uncertainty of 3.2 degrees (radius, 1-sigma containment,\nstatistical only; there is additionally a systematic error which is\ncurrently estimated to be 2 to 3 degrees).\n \nThe angle from the Fermi LAT boresight is 42 degrees.\n\nThe GBM light curve consists of two widely spaced peaks with a duration\n(T90) of about 100 s (8-1000 keV). The time-averaged spectrum from\nT0-1.5 s to T0+31.2 s is best fit by a Band function with\nEpeak = 143 +/- 30 keV, alpha = -0.7 +/- 0.2, and beta = -2.4 +/- 0.5\n\nThe event fluence (8-1000 keV) in this time interval is\n(6.4 +/- 0.7)E-6 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+4.6 s in the 8-1000 keV band is 3.2 +/- 0.3 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 9856,
  "createdOn": 1251773886000,
  "email": "colleen.wilson@nasa.gov",
  "subject": "GRB 090829B: Fermi GBM Detection",
  "submitter": "Colleen A. Wilson at NASA/MSFC/NSSTC  <colleen.wilson@nasa.gov>",
  "eventId": "GRB 090829B"
}