359 citations · 676 across the 9 of their papers we have counts for
9 papers
Modelling X-ray RMS spectra II: the ultra-fast outflow of PDS 456
L. Härer, M. L. Parker, A. Joyce +6
We present an improved model for excess variance spectra describing ultra-fast outflows and successfully apply it to the luminous (L ~ 10^47 erg/s) low-redshift (z = 0.184) quasar…
X-ray reflection from the inner disk of the AGN Ton S180
M. L. Parker, J. M. Miller, A. C. Fabian
We analyse a long archival XMM-Newton observation of the narrow-line Seyfert 1 galaxy Ton S180, using the latest reflection models to explore the high quality X-ray spectrum. We fi…
X-ray Lags in PDS 456 Revealed by Suzaku Observations
Chia-Ying Chiang, E. M. Cackett, A. Zoghbi +5
X-ray reverberation lags from the vicinity of supermassive black holes have been detected in almost 30 AGN. The soft lag, which is the time delay between the hard and soft X-ray li…
The Soft State of Cygnus X-1 Observed with NuSTAR: A Variable Corona and a Stable Inner Disk
D. J. Walton, J. A. Tomsick, K. K. Madsen +17
We present a multi-epoch hard X-ray analysis of Cygnus X-1 in its soft state based on four observations with NuSTAR. Despite the basic similarity of the observed spectra, there is…
Awakening of The High Redshift Blazar CGRaBS J0809+5341
Vaidehi S. Paliya, M. L. Parker, C. S. Stalin +6
CGRaBS J0809+5341, a high redshift blazar at z = 2.144, underwent a giant optical outburst on 2014 April 19 when it brightened by 5 mag and reached an unfiltered apparent mag…
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…
The role of the reflection fraction in constraining black hole spin
T. Dauser, J. Garcia, M. L. Parker +2
In many active galaxies, the X-ray reflection features from the innermost regions of the accretion disc are relativistically distorted. This distortion allows us to measure paramet…
Relativistic Disc lines
A. C. Fabian, E. Kara, M. L. Parker
Broad emission lines, particularly broad iron-K lines, are now commonly seen in the X-ray spectra of luminous AGN and Galactic black hole binaries. Sensitive NuSTAR spectra over th…
On the determination of the spin and disc truncation of accreting black holes using X-ray reflection
A. C. Fabian, M. L. Parker, D. R. Wilkins +4
We discuss the application of simple relativistically-blurred X-ray reflection models to the determination of the spin and the inner radius of the disc in accreting black holes. Ob…