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   PR # 12230
     We propose ASCA observations of AM Her type systems V834 Cen and QQ
    Vul.In both these systems, the gas stream passes in front of the
    X-ray emitting region once per orbit, as evidenced by the EXOSAT soft
    X-ray light curves.By analyzing ASCA light curves in several energy
    bands, including 1--2 keV range, we can profile the cross-section of
    the stream several white dwarf radii away from the surface.This is
    currently the only direct method of probing the density structure of
    the accretion stream, which also determines the structure of the
    post-shock region where X-rays are produced.  We will also perform
    detailed spectroscopy for the first time for these systems, particula
    rly of the iron line and the absorption local to the X-ray emitting
   region.
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