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X-ray flaring in PDS 456 observed in a high-flux state
G. A. Matzeu, J. N. Reeves, E. Nardini +3
We present an analysis of a \,ks (net exposure) \textit{Suzaku} observation, carried out in 2007, of the nearby () luminous (L\,erg\,s)…
New Insights in the Spectral Variability and Physical Conditions of the X-ray Absorbers in NGC 4151
J. D. Couto, S. B. Kraemer, T. J. Turner +1
We investigate the relationship between the long term X-ray spectral variability in the Seyfert 1.5 galaxy NGC 4151 and its intrinsic absorption, by comparing the 2014 simultaneous…
No Signatures of Black-Hole Spin in the X-ray Spectrum of the Seyfert 1 Galaxy Fairall 9
Tahir Yaqoob, Tracey Jane Turner, Malachi M. Tatum +2
Fairall 9 is one of several type 1 active galactic nuclei for which it has been claimed that the angular momentum (or spin) of the supermassive black hole can be robustly measured,…
Discovery of Broad Soft X-ray Absorption Lines from the Quasar Wind in PDS 456
James Reeves, Valentina Braito, Emanuele Nardini +5
High resolution soft X-ray spectroscopy of the prototype accretion disk wind quasar, PDS 456, is presented. Here, the XMM-Newton RGS spectra are analyzed from the large 2013-2014 X…
Measuring Light Echos in NGC 4051
Tracey Jane Turner, Lance Miller, James N. Reeves +1
Five archived X-ray observations of NGC 4051, taken using the NuSTAR observatory, have been analysed, revealing lags between flux variations in bands covering a wide range of X-ray…