{
  "bibcode": "2009GCN..8853....1V",
  "body": "A. von Kienlin (MPE) reports on behalf of the Fermi GBM Team: \n\n\"At 05:26:22.23 UT on 26 January 2009, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 090126B (trigger 254640384  / 090126227 ).\n\nThe on-ground calculated location, using the GBM trigger \ndata, is RA = 190.5, DEC = 33.2  (J2000 degrees, \nequivalent to 19h 42m, 33d 12'), with an uncertainty \nof 4.4 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 18 degrees.\n\nThe GBM light curve consists of a single peak\nwith a duration (T90) of about 10.8 s (8-1000 keV). \nThe time-averaged spectrum from T0-4.608 s to T0+5.632 s is \nbest fit by a power law function with an exponential\nhigh energy cutoff.  The power law index is -0.99 +/- 0.18 and\nthe cutoff energy, parameterized as Epeak, is 47.5 +/- 3.4 keV\n(chi squared 404.17 for 360 d.o.f.).\n\nThe event fluence (8-1000 keV) in this time interval is \n(1.25 +/- 0.24)E-06 erg/cm^2. The 1-sec peak photon flux measured \nstarting from T0-0.512 s in the 8-1000 keV band \nis 4.9 +/- 1.3 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary; \nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 8853,
  "createdOn": 1232987503000,
  "email": "azk@mpe.mpg.de",
  "subject": "GRB 090126B: Fermi GBM detection",
  "submitter": "Andreas von Kienlin at MPE  <azk@mpe.mpg.de>",
  "eventId": "GRB 090126B"
}