{
  "bibcode": "2005GCN..4238....1G",
  "body": "S. Golenetskii, R.Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, and\nT. Cline on behalf of the Konus-Wind team report:\n\nThe long soft GRB 051109A (Swift-BAT trigger #163136;\nTagliaferri et al., GCN 4213, E. Fenimore et al., GCN 4217)\ntriggered Konus-Wind at T0= 4342.541 s UT (01:12:22.541).\n\nAs observed by Konus-Wind it had a single pulse with a duration\nabout ~11 sec and a long decaying tail.\nThis tail was seen up to ~130 sec after T0.\n\nThe preliminary analysis of the Konus-Wind\ndata gave the burst fluence 4.0(-3.4, +0.3)10^-6 erg/cm2,and\npeak flux on 256-ms time scale 5.8(-4.9, +0.3)10^-7 erg/cm2/sec\n(both in the 20 - 500 keV energy range).\nThese values are very uncertain due to weakness and softness\nof the burst.\n\nThe K-W spectrum integrated over the most intense part of the GRB\n(from T0 to T0+8.448 s) is well fitted (in the 20 - 500 keV range)\nby a power law with exponential cutoff model:\ndN/dE ~ E^(-alpha) * exp(-E/E0)\nwith alpha = 1.25 (-0.59, +0.44)\nand E0 = 213 (-126, +246) keV (chi^2 = 56/56 dof).\nThe peak energy Ep = 161 (-58, +224) keV.\n\nAll the quoted errors are at the 90% confidence level.\n\nAssuming z = 2.346 (Quimby et al., GCN 4221) and a standard cosmology\nmodel with H_0 = 70 km/s/Mpc, Omega_M = 0.3, Omega_\\Lambda = 0.7,\nthe isotropic energy release is E_iso ~5x10^52 erg,\nthe maximum luminosity is (L_iso)_max ~2.4x10^52 erg/s.\n\nFurther analysis and refinement is in progress.",
  "circularId": 4238,
  "createdOn": 1131577213000,
  "email": "val@mail.ioffe.ru",
  "subject": "Konus-Wind observation of GRB 051109A",
  "submitter": "Valentin Pal'shin at Ioffe Inst  <val@mail.ioffe.ru>",
  "eventId": "GRB 051109A"
}