  Within the scope of extended matter research, we present new spectral
analysis results of an active binary system AR Lac. The low and high resolution
spectra of this system were taken during the period 2013-2016. The evaluation
of low dispersion spectra together with the B, V, Rc, Ic and WISE photometric
data showed that AR Lac has an excess radiation in W2 band. In addition, the
spectral energy distribution and the minima depth ratios of the light curves of
this active binary system were studied to examine the flux contributions of the
components of the system depending on wavelengths and on orbital phase.
Furthermore, high resolution spectral analysis showed evidence of
prominence-like structures and a possible extended matter around the cooler
component of AR Lac binary system.
