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   PR # 43020
   Recent ROSAT and ASCA observations of high-redshift radio loud
   quasars have revealed that low energy absorption is common in their
   X-ray spectra, suggesting different properties among low and high
   redshift objects. On the other side, no spectral information is
   available so far for the high redshift radio-quiet quasars. The
   proposed observations of 3 high-redshift radio-quiet quasars will
   allow us to obtain broad band (1-30 keV in the source rest frame)
   X-ray spectra of good statistical qualit
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