767 citations · 3.5k across the 68 of their papers we have counts for
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Key results from an XMM-Newton and Chandra study of a new sample of extreme ULXs from the 2XMM catalogue
Andrew D. Sutton, Timothy P. Roberts, Dominic J. Walton
We present highlights from a study of a sample of 10 extreme-luminosity candidate ultraluminous X-ray sources (L_X > 5 x 10^(40) erg sec^(-1)), all at distances < 100 Mpc, identifi…
A Large Catalogue of Ultraluminous X-ray Source Candidates in Nearby Galaxies
D. J. Walton, J. C. Gladstone, T. P. Roberts +1
Since their discovery, Ultraluminous X-ray sources (ULXs) have attracted attention due to their combination of extreme luminosities and extra-nuclear locations. However, they are a…
Explaining the Hard Excesses in AGN
D. J. Walton, R. C. Reis, A. C. Fabian
A common model invoked to describe the X-ray spectra of active galaxies includes a relativistically blurred reflection component, which in some cases can be the dominant contributo…