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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/032/01-02/0067-0071

    • Keywords

       

      AGNs; Blazars (BL Lacertae objects-BLs & amp; Flat Spectrum Radio Quasars); continuum.

    • Abstract

       

      Variability is one of the characteristics of blazars. The rapid variability is superposed on the long term variation. In this work, the variability on different time scales, such as intra-day (IDV), short-term (STV) and long-term (LTV) variations are presented for some sources. We also presented our own observations of some selected objects, for which the historical data were compiled for periodicity analysis using several methods. The parameters of the binary black hole system OJ 287 are determined.

    • Author Affiliations

       

      J. H. Fan1 2 Y. Liu1 2 Y. Li3 Q. F. Zhang3 J. Tao4 5 O. Kurtanidze6

      1. Center for Astrophysics, Guangzhou University, Guangzhou 510006, China.
      2. Astronomy Science and Technology Research Laboratory of Department of Education of Guangdong Province, Guangzhou 510006, China.
      3. Department of Computer Science, Jinan University, Guangzhou 510632, China.
      4. Shanghai Astronomical Observatory, CAS, 80 Nandan Road, Shanghai 200030, China.
      5. Joint Institute for Galaxies and Cosmology, ShAO and USTC, CAS, Shanghai 200030, China.
      6. Abastumani Observatory, Abastumani 0301, Georgia.
    • Dates

       
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