{
  "bibcode": "2009GCN..8805....1V",
  "body": "A.J. van der Horst (NASA/MSFC/ORAU) reports on behalf of the\nFermi GBM Team:\n\n\"At 17:30:15.45 UT on 12 January 2009, the Fermi Gamma-ray Burst Monitor\n(GBM) triggered and located GRB 090112B (trigger 253474217 / 090112.729).\nThe on-ground calculated location, using the Fermi GBM trigger data,\nis RA = 192.7, Dec = +22.2 (J2000 degrees, equivalent to\nJ2000 12h51m, +22d12'), with a statistical uncertainty of 2.1 degrees\n(radius, 1-sigma containment, statistical only; there is additionally\na systematic error which is currently estimated to be 2 to 3 degrees).\nThe angle from the Fermi LAT boresight is 95 degrees.\n\nThe GBM light curve shows one pulse with some substructure, with a\nduration (T90) of about 12 s (50-300 keV). The time-averaged spectrum\nfrom T0 to T0+8.70 s is best fit by a Band function with\nEpeak = 139 +/- 9 keV, alpha = -0.75 +/- 0.06 and beta = -2.43 +/- 0.14.\nThe fluence (8-1000 keV) in this time interval is (5.4 +/- 0.3)E-6 \nerg/cm^2.\nThe 1-sec peak photon flux measured starting from T0+2.6s in the 8-1000 keV\nband is 14 +/- 1 ph/s/cm^2.\n\nThe spectral and temporal analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 8805,
  "createdOn": 1231885286000,
  "email": "Alexander.J.VanDerHorst@nasa.gov",
  "subject": "GRB 090112B: Fermi GBM Detection",
  "submitter": "Alexander van der Horst at NASA/MSFC  <Alexander.J.VanDerHorst@nasa.gov>",
  "eventId": "GRB 090112B"
}