63 citations · 121 across the 7 of their papers we have counts for
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Long-term X-Ray Spectral Variability in AGN from the Palomar sample observed by Swift
S. D. Connolly, I. M. McHardy, C. J. Skipper +1
We present X-ray spectral variability of 24 local active galactic nuclei (AGN) from the Palomar sample of nearby galaxies, as observed mainly by Swift. From hardness ratio measurem…
Probing the hard and intermediate states of X-ray binaries using short time-scale variability
Chris J. Skipper, Ian M. McHardy
Below an accretion rate of approximately a few per cent of the Eddington accretion rate, X-ray binary systems are not usually found in the soft spectral state. However, at accretio…
Very fast X-ray spectral variability in Cygnus X-1: Origin of the hard and soft-state emission components
Chris J. Skipper, Ian M. McHardy, Thomas J. Maccarone
The way in which the X-ray photon index, Γ, varies as a function of count rate is a strong diagnostic of the emission processes and emission geometry around accreting compact objec…