Seven-Year Multi-Colour Optical Monitoring of BL Lacertae Object S5 0716+714

Journal of astrophysics and astronomy

Jun Ma²  Yan Dai³  Jianghua Wu1¹  Xu Zhou² 

[1] Department of Astronomy, Beijing Normal University, Beijing 100875, China.$$;Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China.$$;Department for Popularization of Astronomy, Beijing Planetarium, Beijing 100044, China.$$

关键词: Active;    galaxy;    photometry.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

We monitored the BL Lac object S5 0716+714 in five intermediate optical passbands from 2004 September to 2011 April. The object was active most of the time and intra-day variability was frequently observed. The total variation amplitude tended to decrease with decreasing frequency. Strong bluer-when-brighter chromatism was observed on both long and short timescales.

【 授权许可】

Unknown