Spectral and photometric study of the Seyfert Galaxy MRK 1095 (ARK 120)

Abstract

Spectral observations of Seyfert galaxies at the Fesenkov Astrophysical Institute (FAI) have been carried out for about 50 years, and photometric observations in 𝐵𝑉𝑅 filters have been performed over the past 10 years. The telescope 𝐴𝑍𝑇 − 8 and two 1-meter reflectors located at the high-mountain Tyan-Shan Observatory (TShAO) are used for observations. In addition, archival spectral data obtained in 1970–1990 with an image tube and astronomical film are used to reveal the long-term changes in selected Sy. Digitization of these archival materials is currently being carried out at FAI. In this paper, we present the results of the long-term observations of the Seyfert galaxy Mrk 1095 (Ark 120) and an analysis of its photometric and spectral variability. According to the observations of 2007 − 2021, the variability of the continuum level and radiation fluxes in the emission lines in the spectrum of Mrk 1095 was registered.