• Recent Seven Years of Radio and Optical Variabilities of Quasar 1156+295

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      https://www.ias.ac.in/article/fulltext/joaa/035/03/0481-0483

    • Keywords

       

      Quasar: individual: 1156+295; long-term variability.

    • Abstract

       

      We analyzed the radio (4.8, 8.0 and 14.5 GHz) light curves from UMRAO database and the optical data of quasar 1156+295 and found that the quasar exhibited remarkable quasi-periodic long-term flux variations in both radio and optical bands with a similar variability timescale of 1.2 ± 0.3 yr. In addition, when a cross correlation analysis was adopted to the radio and optical light curves, we found that the optical variations may precede those of the radio e.g., at 14.5 GHz by ∼ 200 days.

    • Author Affiliations

       

      Baorong Liu1 2 3 Xiang Liu1 4

      1. Xinjiang Astronomical Observatory, Chinese Academy of Sciences, 150 Science 1-Street, Urumqi 830011, China.
      2. Department of Physics and GXU-NAOC, Centre for Astrophysics and Space Sciences, Guangxi University, Nanning 530004, China.
      3. University of Chinese Academy of Sciences, Beijing 100049, China.
      4. Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Nanjing 210008, People’s Republic of China.
    • Dates

       
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