246 citations · 2.5k across the 59 of their papers we have counts for
6 papers · 1 filter
Revealing the X-ray Variability of AGN with Principal Component Analysis
M. L. Parker, A. C. Fabian, G. Matt +7
We analyse a sample of 26 active galactic nuclei with deep XMM-Newton observations, using principal component analysis (PCA) to find model independent spectra of the different vari…
Discovery of a ~2 hr high frequency X-ray QPO and iron K alpha reverberation in the active galaxy MS 2254.9-3712
W. N. Alston, M. L. Parker, J. Markeviciute +5
We report the discovery of a Hz ( hr) X-ray quasi-periodic oscillation (QPO) in the active galaxy MS 2254.9-3712, using a ks XMM-Newton…
X-ray time delays from the Seyfert 2 galaxy IRAS 18325-5926
Andrew Lobban, William Alston, Simon Vaughan
Using new XMM-Newton observations we detect hard X-ray time lags in the rapid variability of the Compton-thin Seyfert 2 galaxy IRAS 18325-5926. The higher-energy X-ray variations l…
The changing X-ray time lag in MCG-6-30-15
E. Kara, A. C. Fabian, A. Marinucci +6
MCG-6-30-15 is one of the most observed Narrow Line Seyfert 1 galaxies in the X-ray band. In this paper we examine the X-ray time lags in this source using a total of 600 ks in obs…
Detection of a QPO in 5 XMM-Newton observations of RE J1034+396
W. N. Alston, J. Markevičiūtė, E. Kara +2
The X-ray quasi-periodic oscillation (QPO) at Hz in RE J1034+396 has been robustly observed in the 0.2-10 keV band of one ks XMM-Newton observat…
A Non-thermal Study of the Brightest Cluster Galaxy NGC 1275 - The Gamma-Radio Connection Over Four Decades
K. L. Dutson, A. C. Edge, J. A. Hinton +3
Emission from the active nucleus in the core of the brightest cluster galaxy of the Perseus cluster, NGC 1275, has varied dramatically over the past four decades. Prompted by the F…