{
  "bibcode": "2009GCN..9083....1G",
  "body": "S. Golenetskii, R.Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, P.\nOleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf of the Konus-Wind\nteam, report:\n\nThe long bright GRB 090401B (Swift-BAT trigger #348152: Schady et al., \nGCN 9066; Stamatikos et al., GCN 9068) triggered Konus-Wind at \nT0=30922.964 s UT (08:35:22.964).\n\nThe burst light curve shows a multipeaked structure with a duration of\n~11 s. There is a hint of an extended soft emission.\n\nAs observed by Konus-Wind the burst\nhad a fluence of 6.25(-0.75, +0.78)x10^-5 erg/cm2,\nand a 16-ms peak flux measured from T0+6.576 s\nof 4.63(-0.86, +0.87)x10^-5 erg/cm2/s\n(both in the 20 keV - 10 MeV energy range).\n\nThe time-integrated spectrum of the burst\n(from T0 to T0+16.996 s) is well fitted (in the 20 keV - 10 MeV\nrange) by GRB (Band) model for which:\nthe low-energy photon index alpha = -0.78(-0.09, +0.11),\nthe high energy photon index beta = -2.14(-0.23, +0.15),\nthe peak energy Ep = 409(-60, +66) keV (chi2 = 61.8/85 dof).\n\nAll the quoted errors are at the 90% confidence level.\n\nThe Konus-Wind light curve of this GRB is available\nat http://www.ioffe.ru/LEA/GRBs/GRB090401_T30922/",
  "circularId": 9083,
  "createdOn": 1238758530000,
  "email": "val@mail.ioffe.ru",
  "subject": "Konus-Wind observation of GRB 090401B",
  "submitter": "Valentin Pal'shin at Ioffe Inst  <val@mail.ioffe.ru>",
  "eventId": "GRB 090401B"
}