{
  "bibcode": "2017GCN.21131....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 long/intense GRB 170522B (IPN triangulation:\nHurley et al., GCN 21130) triggered Konus-Wind\nat T0=84124.494 s UT (23:22:04.494)\n\nThe burst light curve shows a weak count rate increase (from\n~T0-187s to ~T0-167s) followed by a bright, multi-peaked pulse\nwhich started at ~T0-30 s an had a total duration of ~87 s.\nThe emission is seen up to ~10 MeV.\n\nAs observed by Konus-Wind, the burst had a fluence of\n(1.75 �� 0.11)x10^-4 erg/cm2 and a 64-ms peak energy flux,\nmeasured from T0+8.640 s of (2.36 �� 0.24)x10^-5 erg/cm2\n(both in the 20 keV - 10 MeV energy range).\n\nThe time-integrated spectrum (measured from T0 to T0+55.040 s)\nis best fit in the 20 keV - 15 MeV range\nby the GRB (Band) function with the following model parameters:\nthe low-energy photon index alpha = -1.16 (-0.05,+0.06),\nthe high energy photon index beta = -2.15 (-0.09,+0.07),\nthe peak energy Ep = 252 (-24,+26) keV,\nchi2 = 89/97 dof.\n\nThe spectrum near the peak count rate (measured from T0+8.448\nto T0+9.472 s) is best fit in the 20 keV - 15 MeV range\nby the GRB (Band) function with the following model parameters:\nthe low-energy photon index alpha = -0.68 (-0.15,+0.16),\nthe high energy photon index beta = -2.29 (-0.31,+0.16),\nthe peak energy Ep = 343 (-53,+79) keV,\nchi2 = 75/72 dof.\n\nThe Konus-Wind light curve of this GRB is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB170522_T84124/\n\nAll the quoted errors are estimated at the 90% confidence level.\nAll the presented results are preliminary.",
  "circularId": 21131,
  "createdOn": 1495551486000,
  "email": "fred@mail.ioffe.ru",
  "subject": "Konus-Wind observation of GRB 170522B",
  "submitter": "Dmitry Frederiks at Ioffe Institute  <fred@mail.ioffe.ru>",
  "eventId": "GRB 170522B"
}