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   PR # 12220
    We propose to obtain X-ray spectra of the Seyfert galaxy Mrk 335 in
    order to determine the nature of the soft Xray excess in this object.
    So far,there have been no proof that soft X-ray excesses of AGNs are
    due to intrinsic steepening of the X-ray spectra towards lower energ-
    ies rather than being an artifact of absorption by ionized medium.Mrk
    335 is uniquely suited to resolve this issue as(1)strong count excess
    below 0.8 keV above the extrapolation of the hard X-ray power law has
    been observed before simultaneosly with a very low N$_H$, and (2) the
    soft X-ray variability is of much higher amplitude as the hard X-ray
    one. Furthermore,we propose to test the hypothesis that the entire X-
    ray spectrum is due to emission from a nonthermal $e^\pm$ source, as
   proposed by Turner et al. (199
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