141 citations · 341 across the 7 of their papers we have counts for
7 papers
Irradiation of accretion discs in active galactic nuclei due to warm absorber
Z. Loska, B. Czerny, R. Szczerba
The presence of the warm absorber of considerable optical depth is seen in many AGN. We show that this medium may affect significantly the optical/UV spectrum of an AGN by backscat…
Extinction due to amorphous carbon grains in red quasars from the SDSS
B. Czerny, J. Li, Z. Loska +1
We construct a quasar extinction curve based on the blue and red composite quasar spectra of Richards et al. (2003) prepared from the SDSS survey. This extinction curve does not sh…
Universal spectral shape of high accretion rate AGN
B. Czerny, M. Nikolajuk, A. Rozanska +3
The spectra of quasars and NLS1 galaxies show surprising similarity in their spectral shape. They seem to scale only with the accretion rate. This is in contradiction with the simp…
Variability of accretion flow in the core of the Seyfert galaxy NGC 4151
B. Czerny, V. T. Doroshenko, M. Nikolajuk +3
We analyze observations of the Seyfert galaxy NGC 4151 covering 90 years in the optical band and 27 years in the 2-10 keV X-ray band. We compute the Normalized Power Spectrum Densi…
Power density spectrum of NGC 5548 and the nature of its variability
B. Czerny, A. Schwarzenberg-Czerny, Z. Loska
We derive power density spectra in the optical and X-ray band in the timescale range from several years down to a day. We suggest that the optical power density spectrum co…
Spectral Components in the Optical Emission of the Seyfert Galaxy NGC 5548 and the Comparison of Intrinsic Nuclear Spectra with Accreting Corona Model
J. Kuraszkiewicz, Z. Loska, B. Czerny
We study the extensively monitored Seyfert galaxy NGC 5548 and compare its nuclear emission with models of accretion disk with accreting corona. To obtain the intrinsic nuclear spe…