82 citations · 145 across the 3 of their papers we have counts for
3 papers
SDSS J094533.99+100950.1 - the remarkable weak emission line quasar
Krzysztof Hryniewicz, Bozena Czerny, Marek Nikolajuk +1
Weak emission line quasars are a rare and puzzling group of objects. In this paper we present one more object of this class found in the Sloan Digital Sky Survey (SDSS). The quasar…
Black hole masses from power density spectra: determinations and consequences
B. Czerny, M. Nikolajuk, M. Piasecki +1
We analyze the scaling of the X-ray power density spectra with the mass of the black hole on the example of Cyg X-1 and Seyfert 1 galaxy NGC 5548. We show that the high frequency t…
The role of extended corona in formation of emission lines and continuum in AGN
A. Kurpiewski, J. Kuraszkiewicz, B. Czerny
We study a model of an accretion disc surrounded by an extended corona of the temperature 10^7 - 10^8 K. This corona modifies the disk spectrum since it redirects a significant fra…