Variability of the Blazar 4C 38.41 in 2006–2017

V. A. Hagen-Thorn, Yu V. Troitskaya, E.I. Hagen-Thorn, I. S. Troitsky, S. S. Savchenko, A. A. Arharov, N. V. Efimova, S. K. Klimanov, E. V. Volkov

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The results of multicolor photometric and polarization observations of the blazar 4C 38.41 (Q 1633+382) performed at St. Petersburg State University, the Pulkovo Astronomical Observatory of the Russian Academy of Sciences, Boston University, and Steward Observatory in 2006–2017 are analyzed. Separate variable sources responsible for the observed activity are distinguished, whose power-lawspectra and high degree of polarization confirm their synchrotron nature. The observed color variability of the object (redder when brighter) can be explained by an increase in the contribution to the total emission of a red component with variable flux and a constant relative spectral energy distribution. A close correlation between the optical and gamma-ray light curves is identified, suggesting the same location of the variable sources responsible for the radiation in these bands.

Original languageEnglish
Pages (from-to)378-390
Number of pages13
JournalAstronomy Reports
Issue number5
StatePublished - 1 May 2019

Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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