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Information × Registration Number 0212U008342, 0112U005612 , R & D reports Title Multi-wavelength observations of Blazars popup.stage_title Head A.E. Volvach, Registration Date 08-01-2013 Organization Scientific-research institute "Crimean asrophysical observatory" popup.description2 We present an analysis of data from multi-frequency monitoring of the blazar 3C 454.3 in 2010-2012, when the source experienced an unusually prolonged flare with a duration of about two years. This corresponds to the orbital period of the companion in a scenario in which two supermassive black holes are present in the nucleus of 3C 454.3. The flare's shape, duration, and amplitude can be explained as a result of precession, if the plane of the accretion disk and the orbital plane of the binary are coincident. We estimated the size of the accretion disk based on the dynamical and geometrical parameters of this binary system: its diameter is comparable to the size of the orbit of the supermassive binary black hole, and its thickness does not exceed the gravitational radius of the central black hole. The results of long-term radio and optical monitoring of two radio-loud quasars. The color indices of these objects did not change during the period covered by observations, i.e., the objects did not become bluer when they brightened. The absence of a distinct correlation between the optical and radio brightness variations was probably due to the presence of substantial time delays between the phenomena occurring in these different wavelength ranges. Product Description popup.authors Борман Г.О. Вольвач Л.М. С.Г. Сергєєв popup.nrat_date 2020-04-02 Close