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   53028
   There is growing evidence from ASCA quasar observations that distant
   quasars show intrinsic absorption which may be a function of redshift.
   If caused by intervening galaxies, the study of this phenomenon can
   lead to information on distant non-luminous matter. If intrinsic to the
   quasar then information on the quasar local material can be obtained.
   We propose to observe distant radio loud and radio quiet quasars to
   constrain the absorption. A measure of the iron line will set limits on
   absorbing material local to the quasars.
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