Spectropolarimetric Observations of Active Galactic Nuclei with the 6-m
  BTA Telescope
  We present the results of our spectropolarimetric observations for a number
of active galactic nuclei (AGNs) carried out at the 6-m telescope with the
SCORPIO focal reducer. The derived wavelength dependences of the polarization
have been analyzed by taking into account the Faraday rotation of the
polarization plane on the photon mean free path in a magnetized accretion disk.
As a result, based on traditional accretion disk models, we have determined the
magnetic field strength and distribution and a number of physical parameters of
the accreting plasma in the region where the optical radiation is generated.
