{
  "bibcode": "2020GCN.28881....1S",
  "body": "D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks,\nM. Ulanov, A. Tsvetkova, A. Lysenko, A. Ridnaia, and T. Cline\non behalf of the Konus-Wind team, report:\n\nThe short-duration GRB 201109A\n(Fermi-GBM detection: The Fermi GBM team, GCN Circ. 28868;\nMalacaria et al., GCN Circ. 28874;\nIPN triangulation: Svinkin et al., GCN Circ. 28877)\ntriggered Konus-Wind at T0=9065.305 s UT (02:31:05.305).\n\nThe burst light curve shows a single pulse\nwhich starts at ~T0-0.2 s and has a total duration of ~0.4 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/GRB201109_T09065/\n\nAs observed by Konus-Wind, the burst\nhad a fluence of 9.79(-1.84,+2.96)x10^-7 erg/cm2,\nand a 16-ms peak flux, measured from T0+0.018 s,\nof 6.13(-2.75,+3.42)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+0.192 s)\nis best fit in the 20 keV - 5 MeV range\nby a power law with exponential cutoff model:\ndN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)\nwith  alpha = -0.96(-0.51,+0.65)\nand Ep = 244(-73,+249) keV (chi2 = 13/16 dof).\nFitting by a GRB (Band) model yields the same alpha and Ep,\nand an upper limit on the high energy photon index: beta < -1.9\n(chi2 = 13/15 dof).\n\nAll the quoted errors are at the 90% confidence level.\nAll the quoted values are preliminary.",
  "circularId": 28881,
  "createdOn": 1605117602000,
  "email": "svinkin@mail.ioffe.ru",
  "subject": "Konus-Wind observation of GRB 201109A",
  "submitter": "Dmitry Svinkin at Ioffe Institute  <svinkin@mail.ioffe.ru>",
  "eventId": "GRB 201109A"
}