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%.