{
  "bibcode": "2016GCN.19477....1S",
  "body": "D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, P. Oleynik,\nM. Ulanov, A. Tsvetkova, A. Lysenko, A. Kozlova, and T. Cline\non behalf of the Konus-Wind team, report:\n\nThe long-duration, very intense GRB 160530A\n(COSI detection: Tomsick, GCN Circ. 19473;\nIPN triangulation: Svinkin et al., GCN circ. 19476)\ntriggered Konus-Wind at T0=25426.549 s UT (07:03:46.549).\n\nThe burst light curve shows a multipeaked structure\nstarted at ~T0-0.1 s with a total duration of ~37 s.\nThe emission is seen up to ~5 MeV.\n\nThe Konus-Wind light curve of this GRB is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB160530_T25426/\n\nAs observed by Konus-Wind, the burst\nhad a fluence of 1.30(-0.04,+0.04)x10^-4 erg/cm2,\nand a 64-ms peak flux, measured from T0+2.416 s,\nof 3.70(-0.38,+0.38)x10^-5 erg/cm2/s\n(both in the 20 keV - 10 MeV energy range).\n\nThe time-averaged spectrum of the burst\n(measured from T0 to T0+38.912 s)\nis best fit in the 20 keV - 5 MeV range\nby a power law with exponential cutoff (CPL) model:\ndN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)\nwith alpha = -0.93(-0.03,+0.03)\nand Ep = 638(-33,+36) keV (chi2 = 73/73 dof).\nFitting by a GRB (Band) model yields the same alpha and Ep,\nand an upper limit on the high energy photon index: beta < -3.5\n(chi2 = 73/72 dof)\n\nThe spectrum near the maximum count rate\n(measured from T0+1.792 to T0+2.560 s)\nis best fit in the 20 keV - 7 MeV range\nby the CPL model\nwith alpha = -0.23(-0.09,+0.10)\nand Ep = 714(-50,+55) keV (chi2 = 53/62 dof).\nFitting by a GRB (Band) model yields the same alpha and Ep,\nand an upper limit on the high energy photon index: beta < -2.9\n(chi2 = 50/61 dof)\n\nAll the quoted errors are at the 90% confidence level.\nAll the quoted values are preliminary.",
  "circularId": 19477,
  "createdOn": 1464711386000,
  "email": "svinkin@mail.ioffe.ru",
  "subject": "Konus-Wind observation of GRB 160530A",
  "submitter": "Dmitry Svinkin at Ioffe Institute  <svinkin@mail.ioffe.ru>",
  "eventId": "GRB 160530A"
}