{
  "bibcode": "2012GCN.13925....1V",
  "body": "A. von Kienlin reports on behalf of the Fermi GBM Team:\n\n\"At 08:24:19.93 UT on 29 October 2012, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 121029A (trigger 373191862 / 121029350).\n\nThe on-ground calculated location, using the GBM trigger\ndata, is RA = 226.8, DEC = -28.2 (J2000 degrees,\nequivalent to 15h 07m, -28d 12'), with an uncertainty\nof 1.7 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 57 degrees.\n\nThe burst triggered an ARR (Automatic Repointing Request), \ncausing Fermi to slew so the LAT would point to the source.  \n\nThis burst was also independently detected by INTEGRAL SPI-ACS.\n\nThe GBM light curve shows a double-peaked burst \nwith a duration (T90) of about 16 s (50-300 keV).\nThe time-averaged spectrum from T0-0.128 s to T0+15.104 s is\nbest fit by a power law function with an exponential\nhigh-energy cutoff.  The power law index is -0.63 +/- 0.07  and\nthe cutoff energy, parameterized as Epeak, is 188 +/- 10 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(7.82 +/- 0.06)E-06 erg/cm^2. The 1.024-sec peak photon flux measured\nstarting from T0+11.84 s in the 10-1000 keV band\nis 13.3 +/- 0.3  ph/s/cm^2.\n\nA Band function fits the spectrum equally well with Epeak= 176 +/- 13 keV, \nalpha = -0.57 +/- 0.09  and beta = -2.82 +/- 0.42.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 13925,
  "createdOn": 1351528334000,
  "email": "azk@mpe.mpg.de",
  "subject": "GRB 121029A: Fermi GBM detection",
  "submitter": "Andreas von Kienlin at MPE  <azk@mpe.mpg.de>",
  "eventId": "GRB 121029A"
}