(Odessa I.I. Mechnikov National University, 2009) Volvach, A. E.; Ryabov, Myhaylo I.
; Volvach, L. N.; Sukharev, Artem L.; Aller, H. D.; Aller, M. F.; Рябов, Михайло Іванович
ccVariations in the radio flux of 3C120, 3C273, 3C279, 3C345, 3C 454.3 are analyzed
using long-term monitoring data at five frequencies from 4.8 to 36.8 GHz obtained at the University
ofMichigan Radio Astronomy Observatory and the Crimean Astrophysical Observatory. A spectral
analysis of the light curves at the various frequencies reveals the presence of periodic components.
Using method of model calculations for each of the found period tested its ability to reproduce the
observed flux variability at different frequencies. On the basis of the model calculations presented
the catalog of the most reliable periods of flux variable of radio sources.