{
  "bibcode": "2009GCN..8798....1G",
  "body": "A. Goldstein (UAH) and R. Preece (UAH) \nreport on behalf of the Fermi GBM Team: \n\n\"At 00:29:02.37 UT on 08 January 2009, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 090108 (trigger 253067344 / 090108020).\n\nThe on-ground calculated location, using the GBM trigger \ndata, is RA = 263.04, DEC = 52.46 (J2000 degrees, \nequivalent to 17h 32m, 52d 28'), with an uncertainty \nof 2.93 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 60 degrees.\n\nThe GBM light curve consists of a single bright pulse \nfollowed by a peak of significantly lesser intensity.\nThe duration of the burst (T90) is about 0.90 s (8-1000 keV). \nThe time-averaged spectrum from T0-0.17 s to T0+0.73 s is \nbest fit by a Band function with Epeak = 104.8 +/- 16.4 keV, \nalpha = -0.47 +/- 0.20, and beta = -1.97 +/- 0.09 \n(chi squared 722.8.5 for 733 d.o.f.).\n\nThe event fluence (8-1000 keV) in this time interval is \n(1.28 +/- 0.24)E-06 erg/cm^2. The 0.064-sec peak photon flux measured \nstarting from T0+0.027 s in the 8-1000 keV band \nis 39.7 +/- 3.9 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary; \nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 8798,
  "createdOn": 1231786842000,
  "email": "adam.m.goldstein@msfc.nasa.gov",
  "subject": "GRB 090108: Fermi GBM Detection",
  "submitter": "Adam Goldstein at Fermi-GBM/UAH  <adam.m.goldstein@msfc.nasa.gov>",
  "eventId": "GRB 090108"
}