{
  "bibcode": "2017GCN.20547....1K",
  "body": "A.Kozlova, S. Golenetskii, R. Aptekar, D. Frederiks, 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 170126A\n(Swift-BAT detection: Kocevski et al., GCN 20530;\nFermi-GBM observation: Bissaldi, GCN 20533;\nAstroSat CZTI detection: Sharma et al., GCN 20537)\ntriggered Konus-Wind at T0=41440.253 s UT (11:30:40.253).\n\nThe burst light curve shows a single pulse\nstarted at ~T0-0.5 s with a total duration of ~28 s.\nThe emission is seen up to 2 MeV.\n\nThe Konus-Wind light curve of this GRB is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB170126_T41440/\n\nAs observed by Konus-Wind, the burst\nhad a fluence of 8.25(-0.81,+0.94)x10^-6 erg/cm2,\nand a 64-ms peak flux, measured from T0+0.992 s,\nof 2.87(-0.85,+0.87)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+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 = -0.98(-0.22,+0.24)\nand Ep = 188(-27,+40) keV (chi2 = 54/59 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 = 54/58 dof)\n\nThe spectrum near the maximum count rate\n(measured from T0+0.256 to T0+8.448 s)\nis best fit in the 20 keV - 2 MeV range\nby a power law with exponential cutoff model\nwith  alpha = -1.03(-0.17,+0.18)\nand Ep = 206(-27,+37) 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 < -2.4\n(chi2 = 40/57 dof)\n\nAll the quoted errors are at the 90% confidence level.\nAll the quoted values are preliminary.",
  "circularId": 20547,
  "createdOn": 1485542670000,
  "email": "ann_kozlova@mail.ioffe.ru",
  "subject": "Konus-Wind observation of GRB 170126A",
  "submitter": "Anna Kozlova at Ioffe Institute  <ann_kozlova@mail.ioffe.ru>",
  "eventId": "GRB 170126A"
}