标题：Variability and spectral variation of 3C 66A
作者：Hu, S.M.;Wu, J.;Guo, H.Y.;Zhou, X.;Zhang, X.;Zheng, Y.G.
作者机构：[Hu, S.M] Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Shandong University at Weihai, 180 Cultral West R 更多
通讯作者地址：[Hu, SM]Shandong Univ Weihai, Shandong Prov Key Lab Opt Astron & Solar Terr Env, 180 Cultral W Rd, Weihai 264209, Shandong, Peoples R China.
来源：Astrophysics and space science
摘要：3C 66A was monitored by the BATC (Beijing-Arizona-Taipei-Connecticut) telescope from 2005 to 2008, 1994 observations were obtained on 89 nights. Detailed research and analysis was performed on these observations in this paper. A long term burst occurred in the whole light curve. No intra-day variability was claimed in our campaign by intra-night light curve analysis. Time lag of shorter wavelenth preceding longer wavelength was shown by correlation analysis. The results showed that the optical spectral shape turned flatter when the source brightened, and the spectral variability indicator was bigger on shorter time-scale as determined by the color indices variation analysis.