{
  "bibcode": "2016GCN.19554....1F",
  "body": "D. Frederiks, S. Golenetskii, R.Aptekar, P. Oleynik, M. Ulanov,\nD. Svinkin, A. Tsvetkova, A.Lysenko, A. Kozlova, and T. Cline,\non behalf of the Konus-Wind team, report:\n\nThe very bright, long-duration GRB 160623A\n(Fermi-LAT detection: Vianello et al., GCN 19553)\ntriggered Konus-Wind at T0=17977.594 s UT (04:59:37.594).\n\nThe light curve shows a broad pulse in the interval\nfrom ~T0-25 s to ~T0+30 s, followed by a weaker emission\nlasting until ~T0+200 s.\nThe emission is seen up to ~15 MeV.\n\nAs observed by Konus-Wind, the burst had a fluence\nof 6.6(-0.1,+0.1)x10^-4 erg/cm2, and a 64-ms peak flux,\nmeasured from T0+9.920 s, of 1.27(-0.03,+0.03)x10^-4 erg/cm2/s\n(both in the 20 keV - 10 MeV energy range).\n\nThe time-averaged spectrum (measured from T0 to T0+38.912 s)\nis best fit in the 50 keV - 15 MeV range\nby the GRB (Band) function with the following model parameters:\nthe low-energy photon index alpha = -1.05 (-0.03,+0.03),\nthe high energy photon index beta = -2.67 (-0.10,+0.08),\nthe peak energy Ep = 562 (-23,+23) keV,\nchi2 = 107/88 dof.\n\nThe spectrum near the peak count rate (measured from T0+7.936\nto T0+11.776 s) is best fit in the 50 keV - 15 MeV range\nby the GRB (Band) function with the following model parameters:\nthe low-energy photon index alpha = -0.88 (-0.05,+0.05),\nthe high energy photon index beta = -2.95 (-0.14,+0.11),\nthe peak energy Ep = 648 (-32,+33) keV,\nchi2 = 104/88 dof.\n\nThe Konus-Wind light curve of this GRB is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB160623_T11977/\n\nAll the quoted errors are at the 90% confidence level.\nAll the quoted values are preliminary.",
  "circularId": 19554,
  "createdOn": 1466702759000,
  "email": "fred@mail.ioffe.ru",
  "subject": "Konus-Wind observation of GRB 160623A",
  "submitter": "Dmitry Frederiks at Ioffe Institute  <fred@mail.ioffe.ru>",
  "eventId": "GRB 160623A"
}