We develop a physically motivated, spherical corona model to investigate the frequency-
dependent time lags in active galactic nucleus (AGN). The model includes the effects of …

Correlated variability between coronal X-rays and disk optical/UV photons provides a very
useful diagnostic of the interplay between the different regions around an active galactic …

We present a technique which predicts the energy dependent fractional rms for linear
correlated variations of a pair of spectral parameters and apply it to an XMM-Newton …

The broadband X-ray emission from type 1 active galactic nuclei, dominated by a power-law
continuum, is thought to arise from repeated inverse Compton scattering of seed optical/UV …

ABSTRACT X-ray reflection from an accretion disc produces characteristic emission lines
allowing us to probe the innermost regions in active galactic nuclei. We investigate these …

We have carried out a systematic analysis of the nearby (z= 0.0279) active galaxy Zw
229.015 using multi-epoch, multi-instrument, and deep pointed observations with XMM …

Correlated variability between coronal X-rays and disc optical/UV photons provides a very
useful diagnostic of the interplay between the different regions around an active galactic …

We propose a geometric method of analysis for the light curves of active galactic nuclei
(AGNs). The time series of flux ratio is modelled by possibly non-linear random oscillation …

Probing the physics of the accretion flow around active galactic nuclei (AGN) is crucial to
understanding their emission mechanisms as well as being able to constrain the …

By analysing the time series of RXTE/PCA data, the non-linear variabilities of compact
sources have been repeatedly established. Depending on the variation in temporal classes …