90 citations · 430 across the 9 of their papers we have counts for
9 papers
First long-term optical spectro-photometric monitoring of a binary black hole candidate E1821+643: I. Variability of spectral lines and continuum
A. I. Shapovalova, L. C. Popovic, V. H. Chavushyan +9
We report the results of the first long-term (1990-2014) optical spectro-photometric monitoring of a binary black hole candidate QSO E1821+643, a low-redshift high-luminosity radio…
On the time delay evolution of five Active Galactic Nuclei
Andjelka Kovacevic, Luka C. Popovic, Alla I. Shapovalova +3
Here we investigate light curves of the continuum and emission lines of five type 1 active galactic nuclei (AGN) from our monitoring campaign, to test time-evolution of their time…
Spectral optical monitoring of 3C 390.3 in 1995-2007: II. Variability of the spectral line parameters
L. C. Popovic, A. I. Shapovalova, D. Ilic +6
A study of the variability of the broad emission-line parameters of 3C390.3, an active galaxy with the double-peaked emission-line profiles, is presented. We give a detail analysis…
Black hole masses and starbursts in X-shaped radio sources
M. Mezcua, A. P. Lobanov, V. H. Chavushyan +1
It has been suggested that the X-shaped morphology observed in some radio sources can reflect either a recent merger of two supermassive black holes (SMBHs) or the presence of a se…
Spectral optical monitoring of 3C390.3 in 1995-2007: I. Light curves and flux variation of the continuum and broad lines
A. I. Shapovalova, L. C. Popovic, A. N. Burenkov +9
Here we present the results of the long-term (1995-2007) spectral monitoring of the broad line radio galaxy \object{3C~390.3}, a well known AGN with the double peaked broad emissio…
Long-term variability of the optical spectra of NGC 4151: II. Evolution of the broad Ha and Hb emission-line profiles
A. I. Shapovalova, L. C. Popovic, A. N. Burenkov +5
Results of the long-term (11 years, from 1996 to 2006) H and H line variations of the active galactic nucleus of NGC 4151 are presented. High quality spectra (S/N>50 and R~8A…