{
  "bibcode": "2009GCN.10276....1G",
  "body": "S. Golenetskii, R.Aptekar, D. Frederiks, E. Mazets, V. Pal'shin,\nP. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf\nof the Konus-Wind team, report:\n\nThe long GRB 091208A (Swift-BAT trigger #378554:\nHoversten et al., GCN 10253; Barthelmy et al., GCN 10264)\ntriggered Konus-Wind at T0=31563.038s UT (08:46:03.038).\n\nThe burst light curve shows a smooth single-pulse structure\nwith a total duration of ~30 s. The Konus-Wind light\ncurve of this GRB is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB091208_T31563/\n\nAs observed by Konus-Wind the burst\nhad a fluence of 6.2(+/-1.0)x10-6 erg/cm2,\nand a 256-ms peak flux measured from T0-0.256s\nof 1.3(+/-0.2)x10-6 erg/cm2/s\n(both in the 20 keV - 2 MeV energy range).\n\nThe time-integrated spectrum of the burst\n(from T0 to T0+24.832 s) can be fitted\nin the 20 keV - 2 MeV range by a power law\nwith exponential cutoff model:\ndN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep), with\nalpha = +0.24(-0.5, +0.7),\nand Ep = 314(-50, +70) keV (chi2 = 74/61 dof).\n\nThe spectrum of the most intense part of the burst\n(measured from T0 to T0+8.448 s) is well fitted\nin the 20 keV - 2 MeV range by a power law\nwith exponential cutoff model, for which\nalpha = +0.13(-0.4, +0.55),\nand Ep = 316(-44, +60) keV (chi2 = 47/61 dof).\n\nAll the quoted results are preliminary.\nAll the quoted errors are at the 90% confidence level.",
  "circularId": 10276,
  "createdOn": 1260463631000,
  "email": "fred@mail.ioffe.ru",
  "subject": "Konus-Wind observation of GRB 091208A",
  "submitter": "Dmitry Frederiks at Ioffe Institute  <fred@mail.ioffe.ru>",
  "eventId": "GRB 091208A"
}