{
  "bibcode": "2014GCN.16759....1S",
  "body": "M. Stanbro (UAH) reports on behalf of the Fermi GBM Team:\n\n\"At 21:07:27.47 UT on 29 August 2014, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 140829A (trigger 431039250 / 140829880).\nThe GBM error circle was also observed with iPTF in search of an optical\ncounterpart of the GRB; no credible counterpart was found (Singer et. al.,\n2014, GCN 16758).\n\nThe GBM light curve consists of a double pulse with a duration (T90)\nof about 19 s (50-300 keV). The time-averaged spectrum from T0-3.1 s\nto T0+18.4 s is well fit by a power law function with an exponential\nhigh-energy cutoff.  The power law index is -0.5 +/- 0.2 and\nthe cutoff energy, parameterized as Epeak, is 324 +/- 43 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(5.12 +/- 0.41)E-06 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+11.52 s in the 10-1000 keV band\nis 2.9 +/- 0.4 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 16759,
  "createdOn": 1409518238000,
  "email": "mcs0001@uah.edu",
  "subject": "GRB 140829A: Fermi GBM Detection",
  "submitter": "Matthew Stanbro at UAH/Fermi  <mcs0001@uah.edu>",
  "eventId": "GRB 140829A"
}