{
  "bibcode": "2004GCN..2923....1G",
  "body": "S. Golenetskii, R.Aptekar, E. Mazets, V. Pal'shin, D. Frederiks\non behalf of Konus-Wind and Helicon/Coronas-F teams, and\nT. Cline on behalf of the Konus-Wind team report:\n\nWe present an evidence of Helicon-Coronas-F detection of the giant\noutburst from SGR1806-20 which was scattered back from the Moon.\nAt the time of the outburst SGR1806-20 was occulted by the Earth\nfor Coronas-F. A short burst triggered Helicon at 21:30:29.303s UT on\nDec 27. A time delay between Konus-Wind and Helicon-Coronas-F detections\nis -7.70 s. This value corresponds exactly to burst travelling time from\n  the Wind to the Moon and back to the Coronas-F. The spectrum of the\nevent detected by the Helicon is highly unusual. It looks like a broad\nassymetric line peaked at ~100 keV. Apparently such a shape corresponds\nto back-scattering peak of a huge initial pulse of the outburst. The\nfluence of event is about 7.5x10^-7 erg cm-2 in 25-400 keV range.",
  "circularId": 2923,
  "createdOn": 1104348756000,
  "email": "fred@mail.ioffe.ru",
  "subject": "Detection of the SGR 1806-20 giant outburst back-scattered by the",
  "submitter": "Dmitry Frederiks at Ioffe Institute  <fred@mail.ioffe.ru>"
}