100 citations · 572 across the 16 of their papers we have counts for
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The Accuracy of Supermassive Black Hole Masses Determined by the Single-Epoch-Spectrum (Dibai) Method
Nikolai G. Bochkarev, C. Martin Gaskell
The first set of supermassive black hole mass estimates, published from 1980 to 1984 by E. A. Dibai, are shown to be in excellent agreement with recent reverberation-mapping estima…
Long-term variability of the optical spectra of NGC 4151: I. Light curves and flux correlations
A. I. Shapovalova, L. C. Popovic, S. Collin +13
Results of a long-term spectral monitoring of the active galactic nucleus of NGC 4151 are presented (11 years, from 1996 to 2006). High quality spectra (S/N>50 in the continuum nea…
Probing the physical properties of the NGC 5548 Broad Line Region using Balmer lines
L. C. Popovic, A. I. Shapovalova, V. H. Chavushyan +4
We investigate the physical characteristics of the Broad Line Region (BLR) of NGC 5548 using the Boltzmann plot (BP) method, that we applied on the Balmer lines observed from 1996…
Profile variability of the H-alpha and H-beta broad emission lines in NGC5548
A. I. Shapovalova, V. T. Doroshenko, N. G. Bochkarev +10
Between 1996 and 2002, we have carried out a spectral monitoring program for the Seyfert galaxy NGC 5548. High quality spectra (S/N>50), covering the spectral range (4000-7500)AA w…
A Spectroscopic and Photometric Study of Short-Timescale Variability in NGC5548
M. Dietrich, C. F. Bender, D. J. Bergmann +19
Results of a ground-based optical monitoring campaign on NGC5548 in June 1998 are presented. The broad-band fluxes (U,B,V), and the spectrophotometric optical continuum flux F_lamb…