298 citations · 2k across the 42 of their papers we have counts for
3 papers · 1 filter
A Long XMM-Newton Observation of An Extreme Narrow Line Seyfert 1: PG 1244+026
Chichuan Jin, Chris Done, Matthew Middleton +1
We explore the origin of the strong soft X-ray excess in Narrow Line Seyfert 1 galaxies using spectral-timing information from a 120ks {\it XMM-Newton} observation of PG 1244+026.…
The ultraluminous state revisited: fractional variability and spectral shape as diagnostics of super-Eddington accretion
Andrew D. Sutton, Timothy P. Roberts, Matthew J. Middleton
Although we are nearing a consensus that most ULXs are stellar-mass black holes in a super-Eddington state, little is yet established of the physics of this accretion mode. Here, w…
X-ray Outflows and Super-Eddington Accretion in the Ultraluminous X-ray Source Holmberg IX X-1
D. J. Walton, J. M. Miller, F. A. Harrison +4
Studies of X-ray continuum emission and flux variability have not conclusively revealed the nature of ultra-luminous X-ray sources (ULXs) at the high-luminosity end of the distribu…