Here we report our recent results of variability studies in optical and X-ray bands of three blazars namely 3C 273, PKS 2155 - 304 and BL Lacertae with XMM-Newton. We found large amplitude optical to X-rays variability in 3C 273, and PKS 2155 - 304 on year time scale. In 3C 273, we noticed that synchrotron cooling and particle acceleration are at work at different epoch of observations. In PKS 2155 - 304, spectral energy distribution from optical to X-ray is fitted with LPPL (log parabolic + power law) model. In BL Lacertae, optical flux and degree of polarization were anti-correlated.
@article{arxiv.1510.02307,
title = {Optical and X-ray Variability of Blazars},
author = {A. C. Gupta},
journal= {arXiv preprint arXiv:1510.02307},
year = {2017}
}
Comments
2 pages, Accepted for publication to ASI Conference Series for RETCO II held at ARIES in May 6-8, 2015