{
  "bibcode": "2013GCN.14565....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 short-duration hard GRB 130504B\n(Fermi-GBM detection: von Kienlin, GCN 14560;\nIPN triangulation: Golenetskii et al., GCN 14561)\ntriggered Konus-Wind at T0=27119.723s UT (07:31:59.723)\n\nThe light curve shows a double-peaked structure\nfrom ~T0-0.064 s to ~T0+0.368s.\nThe total duration of the burst is ~0.430 s\nThe emission is seen up to ~8 MeV.\n\nThe Konus-Wind light curve of this GRB is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB130504_T27119/\n\nAs observed by Konus-Wind, the burst\nhad a fluence of (9.3 � 0.9)x10-6 erg/cm2,\nand a 16-ms peak flux, measured from T0+0.320s,\nof (5.0 � 0.9)x10-5 erg/cm2/s\n(both in the 20 keV - 10 MeV energy range).\n\nThe spectrum of the burst (measured from T0 to T0+0.256 s)\nis best fit in the 20 keV - 15 MeV range\nby the cutoff power law with the following model parameters:\nthe photon index alpha = -0.50 � 0.13,\nthe peak energy Ep = 980 � 125 keV,\nchi2 = 40/36 dof.\n\nAll the quoted results are preliminary.",
  "circularId": 14565,
  "createdOn": 1367745624000,
  "email": "fred@mail.ioffe.ru",
  "subject": "Konus-Wind observation of GRB 130504B",
  "submitter": "Dmitry Frederiks at Ioffe Institute  <fred@mail.ioffe.ru>",
  "eventId": "GRB 130504B"
}