Abstract
The spectroscopic Hα observations of five RS CVn systems (UX Ari, HR 1099, Z Her, HK Lac, RT Lac) and of the contact system VW Cep here discussed were obtained in 1989, 1990, 1991, 1993 and 1994 with the 91-cm telescope at the Serra La Nave station (Mt. Etna, 1750 m a. s. l.) of the Catania Astrophysical Observatory. The spectra recorded on a CCD camera (Bonanno and Di Benedetto, 1990) were obtained with the REOSC echelle spectrograph in the single-mode configuration and in the echelle-mode configuration yielding a resolution of 1.7 A and 0.46 A respectively.
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