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   PR # 12013
    The symbiotic star CH Cygni is evolving rapidly as indicated by repea
    ted outbursts,which are characterized by the ejection of large quanti
    ties of optically thick material,the appearance of intense photo-exci
    ted nebular emission & jet formation.The most recent active phase beg
    an in 1989 & continues to-date.Rapid (5-20 min) brightness variations
    (UBVR) and X-ray (EXOSAT)have been observed several times in CH Cyg.
    We will use the ASCA data to investigate the nature of this "flicker-
    ing";to determine the long term behavior of the X-ray flux,especially
    during active phases, by comparison with previous X-ray observ.; and
    to investigate whether multiple spectral components (boundary layer
    between accretion disk & white dwarf,shocked intersystem material)
   contribute to the X-ray emissi
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