{
  "bibcode": "2011GCN.12064....1G",
  "body": "S. Golenetskii, R.Aptekar, D. Frederiks, E. Mazets, V. Pal'shin,\nP. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf\nof the Konus-Wind team, report:\n\nThe long GRB 110604A (detected and localized by IPN\nand Swift-BAT: Barthelmy et al., GCN 12063)\ntriggered Konus-Wind at T0=53385.666s UT (14:49:45.666)\n\nThe burst light curve consists of several multi-peaked pulses,\na total duration of the burst is ~45 s.\nThe emission is seen up to ~8 MeV.\nThe Konus-Wind light curve of this GRB is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB110604_T53385/\n\nAs observed by Konus-Wind the burst\nhad a fluence of (3.1 � 0.3)x10-5 erg/cm2,\nand a 64-ms peak flux, measured from T0+2.880 s,\nof (4.6 � 0.5)x10-6 erg/cm2/s\n(both in the 20 keV - 5 MeV energy range).\n\nThe time-integrated spectrum of the burst\n(from T0 to T0+37.376 s) is best fitted\nin the 20 keV - 5 MeV range by the GRB (Band)\nmodel, for which:\nthe low-energy photon index alpha = -1.10 (-0.08, +0.10),\nthe high energy photon index beta = -3.2 (<-2.6),\nthe peak energy Ep = 166(-16, +15) keV,\nchi2 = 71.7/76 dof.\n\nThe spectrum at the maximum count rate\n(measured from T0 to T0+5.376 s) is best fitted\nin the 20 keV - 5 MeV range by the GRB (Band)\nmodel, for which:\nthe low-energy photon index alpha = -0.8 (-0.1, +0.1),\nthe high energy photon index beta = -3.0 (-2.5, +0.3),\nthe peak energy Ep = 183(-14, +17) keV,\nchi2 = 64.7/70 dof.\n\nAlso, both spectra show, in the 2-8 MeV range,\na hint of a weak additional hard spectral component.\n\nAll the quoted results are preliminary.\nAll the quoted errors are at the 90% confidence level.",
  "circularId": 12064,
  "createdOn": 1307370977000,
  "email": "fred@mail.ioffe.ru",
  "subject": "Konus-Wind observation of GRB 110604A",
  "submitter": "Dmitry Frederiks at Ioffe Institute  <fred@mail.ioffe.ru>",
  "eventId": "GRB 110604A"
}