Photopolarimetrical Study of Blazar-type AGN OJ287 in 2012-2015 with the 2m RCC Telescope at NAO Rozhen

TL;DR

This study presents photopolarimetric observations of blazar OJ287 from 2012 to 2015, revealing polarization plane rotation and potential correlation between brightness and polarization degree, enhancing understanding of blazar jet physics.

Contribution

First detailed multi-year photopolarimetric analysis of OJ287 using the 2m RCC telescope, documenting polarization rotation and brightness-polarization correlation.

Findings

Mean polarization plane rotation of 6.23 deg/day observed.

Correlation between R-band brightness and polarization degree suggested.

Results align with previous polarization measurements.

Abstract

We present the results of a photopolarimetric study of the blazar OJ287 in the period November 2012-January 2015. Observations were conducted using the Focal Reductor FoReRo-2 of the 2-meter RCC telescope of the National Astronomical Observatory (NAO) Rozhen. The observed change of the position angle (P.A.) corresponds to mean rotation of the plane of polarization of 6.23 deg/day, in good agreement with previous measurements. An indication of a correlation between the change of brightness in R-band and the change in the degree of polarization is also observed.