Abstract
We present the results of photo-polarimetric monitoring observations of the blazar Markarian 421 carried out with different telescopes (the 0.4 m telescopes of St. Petersburg State University and the Pulkovo Observatory, the 0.7 m telescope of the Crimean Astrophysical Observatory) during 2008–2015. We analyse the optical data as well as gamma-ray ligh t curves obtained with the Fermi Large Area Telescope. The multiwavelength flux variations are discussed.
Highlights
Mkn 421 is the closest (z = 0.031) and the most well studied TeV blazar
Color analysis is an important tool to investigate the spectral behavior of the source and, in turn, the nature of its emission
The technique that was used in our analysis of the color variations is described in [9]
Summary
The observing and reduction techniques are described in [7]. We derive γ-ray flux densities at 0.1–200 GeV by analyzing data from the Fermi Large Area Color analysis is an important tool to investigate the spectral behavior of the source and, in turn, the nature of its emission.
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