{
  "bibcode": "2014GCN.16351....1G",
  "body": "S. Golenetskii, R.Aptekar, D. Frederiks, V. Pal'shin, P. Oleynik,\nM. Ulanov, D. Svinkin, A. Tsvetkova, and T. Cline\non behalf of the Konus-Wind team, report:\n\nThe short-duration, hard spectrum, bright GRB 140604A (Golenetskii et \nal., GCN ) triggered Konus-Wind at T0=17415.447 s UT (04:50:15.447).\nThe burst light curve shows several peaks with a total duration of ~1s. \nThe emission is seen up to ~3 MeV.\n\nAs observed by Konus-Wind, the burst had a fluence of\n7.2(-1.8,+2.4)x10^-6 erg/cm2, and a 16-ms peak flux, measured from \nT0+0.592 s, of 2.55(-0.65,+0.89)x10^-5 erg/cm2/s\n(both in the 20 keV - 10 MeV energy range).\n\nThe time-integrated spectrum of the burst (measured from T0 to T0+8.448 \ns) is best fit in the 20 keV - 4 MeV range\nby a power law with exponential cutoff model:\ndN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)\nwith  alpha = -0.54(-0.32,+0.43),\nand Ep = 795(-236,+414) keV (chi2 = 62/68 dof).\nFitting by a GRB (Band) model yields the same alpha and Ep,\nand an upper limit on the high energy photon index: beta < -1.7 (chi2 = \n62/67 dof).\n\nThe Konus-Wind light curve of this GRB is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB140604_T17415/\n\nAll the quoted errors are at the 90% confidence level.\nAll the quoted values are preliminary.",
  "circularId": 16351,
  "createdOn": 1401982503000,
  "email": "val@mail.ioffe.ru",
  "subject": "Konus-Wind observation of GRB 140604A",
  "submitter": "Valentin Pal'shin at Ioffe Inst  <val@mail.ioffe.ru>",
  "eventId": "GRB 140604A"
}