| Abstract: | The main purpose of this paper was the examination of the Cassegrain-spectrograph of the 2-m-universaltelescope at Tautenburg for investigations of magnetic stars. Therefore from 26 spectrograms of the well known magnetically variable star α2CVn taken with a reciprocal linear dispersion of 10 Å/mm variations of radial velocity and magnetic field strength for some lines of Eu II, Cr II, Si II, Mg II were determined. The results agree well with those of Babcock 5] and Struve and Swings 2], derived from spectrograms of higher dispersion. The large variation in the radial velocity of Eu II and Cr II is confirmed. In the oblique rotator model this requires a very strong concentration of Eu II at the poles and of Cr II at the equator. |
