5 papers
Probing the Central Engine of the Narrow-Line Seyfert 1 Galaxies
Agnieszka Janiuk, Joanna Kuraszkiewicz, Bozena Czerny
The central engine of the the Narrow Line Seyfert 1 galaxies is being probed. We use the ASCA and RXTE data to model the X-ray primary continuum as well as the reflected component…
Spectral properties of the Narrow-Line Seyfert 1 Quasar PG1211+143
Agnieszka Janiuk, Bozena Czerny, Grzegorz M. Madejski
We propose a theoretical model to explain the spectrum of the quasar PG1211+143 emitted in the Optical/X-ray bands. In particular, we suggest that the inner accretion disk may deve…
Thermal and Viscous Instability of Accretion Disc in AGN
Agnieszka Janiuk, Bozena Czerny
The standard accretion discs are known to be thermally and viscously unstable over a certain range of temperatures. In the inner disc regions there may develop radiation pressure d…
X-ray reprocessing in Narrow-Line Seyfert 1 Galaxies: Ton S180 and Ark 564
A. Janiuk, P. T. Zycki, B. Czerny
We present the results of spectral analysis of the ASCA data for the Narrow-Line Seyfert 1 galaxy (NLS1) Ton S180 and simultaneous ASCA and RXTE data modelling for the NLS1 Ark 564…
Variability Model for the Microquasar GRS 1915+105
Agnieszka Janiuk, Bozena Czerny, Aneta Siemiginowska +1
We analyse the radiation pressure instability of the standard, optically thisc disc and propose it as an explanation of the obseved variability of the superluminal microquasar GRS…