160 citations · 395 across the 6 of their papers we have counts for
9 papers
X-ray Variability of the Seyfert 1 Markarian 335: Power Spectrum and Time Lags
P. Arevalo, I. M. McHardy, D. P. Summons
To investigate further the comparison between AGN and black hole X-ray binaries, we have studied the main X-ray variability properties of the Seyfert 1 Galaxy Markarian 335. We put…
Fourier-resolved energy spectra of the Narrow Line Seyfert 1 Mkn 766
P. Arevalo, I. M. McHardy, A. Markowitz +4
We compute Fourier-resolved X-ray spectra of the Seyfert 1 Markarian 766 to study the shape of the variable components contributing to the 0.3-10 keV energy spectrum and their time…
Discovery of multiple Lorentzian components in the X-ray timing properties of the Narrow Line Seyfert 1 Ark 564
I. M. McHardy, P. Arevalo, P. Uttley +4
We present a power spectral analysis of a 100 ksec XMM-Newton observation of the narrow line Seyfert 1 galaxy Ark~564. When combined with earlier RXTE and ASCA observations, these…
Timing evidence in determining the accretion state of the Seyfert galaxy NGC 3783
D. P. Summons, P. Arevalo, I. M. McHardy +2
Previous observations with the Rossi X-ray Timing Explorer (RXTE) have suggested that the power spectral density (PSD) of NGC 3783 flattens to a slope near zero at low frequencies,…
The Energy-dependent X-ray Timing Characteristics of the Narrow Line Seyfert 1 Mkn 766
A. Markowitz, I. E. Papadakis, P. Arevalo +3
We present the energy-dependent power spectral density (PSD) and cross-spectral properties of Mkn 766, obtained from combining data obtained during an XMM-Newton observation spanni…
Spectral-timing evidence for a Very High State in the Narrow Line Seyfert 1 Ark 564
P. Arevalo, I. E. Papadakis, P. Uttley +2
We use a 100 ks long XMM-Newton observation of the Narrow-Line Seyfert 1 galaxy Ark 564 and combine it with the month-long monitoring of the same source produced by ASCA, to calcul…