{
  "bibcode": "2011GCN.12019....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 bright GRB 110518A (localized by IPN:\nGolenetskii et al., GCN 12018)\ntriggered Konus-Wind at T0=74290.767s UT (20:38:10.767)\n\nThe burst light curve consists of two major pulses,\na total duration of the burst is ~35 s.\nThe emission in the first harder multi-peaked pulse\nis seen up to ~8 MeV.\nThe Konus-Wind light curve of this GRB is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB110518_T74290/\n\nAs observed by Konus-Wind the burst\nhad a fluence of (6.5 � 0.8)x10-5 erg/cm2,\nand a 16-ms peak flux, measured from T0+0.400 s,\nof (4.7 � 0.5)x10-5 erg/cm2/s\n(both in the 20 keV - 10 MeV energy range).\n\nThe time-integrated spectrum of the burst\n(from T0 to T0+35.072 s) is best fitted\nin the 20 keV - 10 MeV range by the GRB (Band)\nmodel, for which:\nthe low-energy photon index alpha = -1.29 (-0.07, +0.08),\nthe high energy photon index beta = -2.30 (-0.35, +0.15),\nthe peak energy Ep = 229(-35, +43) keV,\nchi2 = 102.6/84 dof.\n\nThe spectrum at the maximum count rate\n(measured from T0+0.256 s to T0+0.512 s) is best fitted\nin the 20 keV - 10 MeV range by the GRB (Band)\nmodel, for which:\nthe low-energy photon index alpha = -0.46 (-0.16, +0.18),\nthe high energy photon index beta = -2.6 (-0.7, +0.3),\nthe peak energy Ep = 535(-88, +123) keV,\nchi2 = 50.4/48 dof.\n\nAll the quoted results are preliminary.\nAll the quoted errors are at the 90% confidence level.",
  "circularId": 12019,
  "createdOn": 1305894722000,
  "email": "fred@mail.ioffe.ru",
  "subject": "Konus-Wind observation of GRB 110518A",
  "submitter": "Dmitry Frederiks at Ioffe Institute  <fred@mail.ioffe.ru>",
  "eventId": "GRB 110518A"
}