{
  "bibcode": "2015GCN.17363....1G",
  "body": "S. Golenetskii, R. Aptekar, D. Frederiks, V. Pal'shin, P. Oleynik,\nM. Ulanov, D. Svinkin, A. Tsvetkova, A. Lysenko, and T. Cline\non behalf of the Konus-Wind team, report:\n\nThe long-duration GRB 150127B (IPN triangulation: Hurley et al., GCN \n17360) triggered Konus-Wind at T0=50911.89 s UT (14:08:31.890).\n\nThe burst light curve shows two multi-peak emission episodes with a \ntotal duration of ~90 s.\nThe emission is seen up to ~1 MeV.\n\nThe Konus-Wind light curve of this GRB is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB150127_T50911/\n\nAs observed by Konus-Wind, the burst\nhad a fluence of 5.43(-0.21,+0.23)x10^-5 erg/cm2,\nand a 256-ms peak flux, measured from T0+10.288 s,\nof 2.97(-0.43,+0.43)x10^-6 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+82.176 s)\nis best fit in the 20 keV - 2 MeV range\nby a power law with exponential cutoff model:\ndN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)\nwith  alpha = -0.98(-0.10,+0.10)\nand Ep = 197(-12,+14) keV (chi2 = 40/58 dof).\nFitting by a GRB (Band) model yields the same alpha and Ep,\nand an upper limit on the high energy photon index: beta < -2.8\n(chi2 = 40/57 dof)\n\nThe spectrum near the maximum count rate\n(measured from T0+0.000 to T0+16.640 s)\nis best fit in the 20 keV - 2 MeV range\nby a power law with exponential cutoff model:\ndN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)\nwith  alpha = -0.23(-0.13,+0.14)\nand Ep = 252(-13,+14) keV (chi2 = 49/58 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 = 47/57 dof)\n\nAll the quoted errors are at the 90% confidence level.\nAll the quoted values are preliminary.",
  "circularId": 17363,
  "createdOn": 1422626587000,
  "email": "val@mail.ioffe.ru",
  "subject": "Konus-Wind observation of GRB 150127B",
  "submitter": "Valentin Pal'shin at Ioffe Inst  <val@mail.ioffe.ru>",
  "eventId": "GRB 150127B"
}