{
  "bibcode": "2015GCN.17344....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, hard-spectrum, intense GRB 150118B\n(Fermi-LAT detection: Kocevski et al., GCN 17307;\nFermi-GBM detection: Stanbro, GCN 17308;\nIPN triangulation: Hurley et al., GCN 17342)\ntriggered Konus-Wind at T0=35302.394 s UT (09:48:22.394).\n\nThe light curve shows multiple emission episodes from ~T0-8 s to ~T0+60 s.\nThe emission is seen up to ~10 MeV.\n\nThe Konus-Wind light curve of this GRB is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB150118_T35302/\n\nAs observed by Konus-Wind, the burst had a fluence\nof 1.87(-0.15,+0.14)x10^-4 erg/cm2, and a 64-ms peak flux,\nmeasured from T0+39.680 s, of 1.88(-0.18,+0.20)x10^-5 erg/cm2/s\n(both in the 20 keV - 10 MeV energy range).\n\nThe time-averaged spectrum (measured from T0 to T0+58.368 s)\nis best fit in the 20 keV - 15 MeV range\nby the cutoff power law with the following model parameters:\nthe photon index alpha = -0.98(-0.04,+0.04),\nand the peak energy Ep = 695(-42,+47) keV,\nchi2 = 103/97 dof.\nFitting this spectrum with the Band model yields the same\nvalues of alpha and Ep with an upper limit on beta of -2.8\n\nThe spectrum near the peak count rate (measured from T0+35.328 to T0+41.984 s)\nis best fit in the 20 keV - 15 MeV range\nby the cutoff power law with the following model parameters:\nthe photon index alpha = -0.84(-0.08,+0.08),\nand the peak energy Ep = 614(-55,+64) keV,\nchi2 = 115/98 dof.\n\nAll the quoted errors are at the 90% sigma confidence level.\nAll the quoted values are preliminary.",
  "circularId": 17344,
  "createdOn": 1421926217000,
  "email": "fred@mail.ioffe.ru",
  "subject": "Konus-Wind observation of GRB 150118B",
  "submitter": "Dmitry Frederiks at Ioffe Institute  <fred@mail.ioffe.ru>",
  "eventId": "GRB 150118B"
}