BEPPOSAX OBSERVATIONS OF QUASARS

We present results from recent BeppoSAX observations of low redshift ( z<0.4, Po sample) and high redshift (2<z<4.5) radio-quiet and radio-lo ud quasars. Significant curvature has been detected in the spectra of the observed PGs: the spectrum flattens by 0.5 above 2 keV. The possib le presence of narrow features in the MECS spectra is discussed. Intri nsic absorption has been measured in the z=3.9 radio-loud quasar 1745624. The z=2.3 radio-quiet quasar HE1104-1805 has been found at a very low flux level, in comparison with previous ROSAT and ASCA observatio ns, implying large (factor of similar to 4) variability on years times cales.