Abstract
We present the first ever simultaneous optical linear and circular polarization observations of blazars. These polarizations have been measured simultaneously inUBVRI-bands in three blazars; 3C 66A, OJ 287 and Markarian 421. Measured linear polarization in 3C 66A was the largest ever observed, at PR = 33.1 ± 0.5 per cent. In 3C 66A we detected small circular polarization in the other bands, exceptU. In OJ 287 we detected variable circular polarization in theU-band.
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Takalo, L.O., Sillanpää, A. Simultaneous linear and circular polarization observations of blazars 3C 66A, OJ 287 and Markarian 421. Astrophys Space Sci 206, 191–196 (1993). https://doi.org/10.1007/BF00658144
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DOI: https://doi.org/10.1007/BF00658144