Makoto Uemura （植村 誠）

We characterize the variability of blazars using the Ornstein–Uhlenbeck (OU) process, and search for the features that are discriminative for the two subtypes, FSRQs and BL Lac objects.

The observed SEDs of blazars cannot determine all parameters of the synchrotron self-Compton model in most cases. We studied this problem in detail, and present the SED analysis of the blazar Mrk 421.

We report on the variation in the optical polarization of the blazar PKS 1749+096. The object favors a polarization angle (PA) of 40°-50° at the flare maxima. Three clear polarization rotations were detected.