Name of the Speaker(s): Yuri Efimov
Institution: Crimean Astrophysical Observatory
Title of the communication:
Blazar's polarimetry at the Crimean Astrophysical Observatory
Preliminary abstract:
Photopolarimetry of four blazars
(OJ 287, 3C66A, S5 0716+71, Mrk 421) in UBVRI bands was made at the
Crimean Astriphysical Observatory in the course of the international
campaigne OJ-94. The mostly important was the detection of the
continuous rotation of the pozition angle of polarization in OJ 287
during its outburst in winter 1994/1995. This rotation may be considered
as direct indication on the helical structure of the magnetic field
of the jet in OJ 287. The rapid variations of the brightness of the
object in 1995/1996 may be due to the multicomponent structure of the
jet. The others object also show complicated time variations of the
polarization parameters. The degree of polarization of 3C66A which was
in bright stage was at the level of 25-30%.