Study of X-ray reflection features in a sample of Sy 1s observed by   BeppoSAX
  The ionized disc reflection model of Ross & Fabian is applied to a sample of five Seyfert 1 galaxies observed by BeppoSAX. Good fits were obtained for all the objects in the sample. NGC 4051 and Mkn 335 (usually classified as NLSy 1s) show evidence of a highly ionized accretion disc (xi ~ 350 erg cm s^{-1} and xi \~ 800 erg cm s^{-1}). While NGC 3783 seems to be a ``pure Sy 1'' characterized by a highly ionized accretion disc (xi ~ 500 erg cm s^{-1}). All the sources are consistent with having a face-on disc. The accurate determination of the continuum emission allows us to investigate the spectral variability in the case of Mkn 509. 
A. De Rosa (1 and 2), A. C. Fabian (1), L. Piro (2), D. R. Ballantyne   (1) ((1) IoA, Cambridge, (2) IAS-CNR, Rome)