... Based on the measurements of the Stokes parameters in the continuum and in the broad 0.6563 nm hydrogen emission line obtained with the 6-m telescope for the Seyfert galaxy Mkn 6, secular variability of the hydrogen line profile polarization was discovered; a time lag of less than 2 days between the continuum flux and the polarized continuum emission was determined which corresponds to the size of the region where the polarization of the continuum occurs, less than 0.001 pc. ...

... Romanyuk , V . ... Instrumental circular and linear polarization is shown to be insignificant. ... It is planned to be used for determination of a magnetic field structure of peculiar stars, and dipole orientation, for study of circular and linear polarization wide depressions within 4200 - 5200 A being characteristic for magnetic star spectra and also for other spectropolarimetric investigations of various objects in narrow (dozens of A) and wide (hundreds of A) spectral regions. ...