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Modelling the behaviour of accretion flows in X-ray binaries
- C. Done, M. Gierliński, A. Kubota
- Physics
- 1 August 2007
We review how the recent increase in X-ray and radio data from black hole and neutron star binaries can be merged together with theoretical advances to give a coherent picture of the physics of the… Expand
Is the soft excess in active galactic nuclei real
- M. Gierliński, C. Done
- Physics
- 21 March 2004
We systematically analyse all publicly available XMM–Newton spectra of radio-quiet PG quasars. The soft X-ray excess in these objects is well modelled by an additional, cool, Compton scattering… Expand
The ultraluminous state
- J. Gladstone, T. Roberts, C. Done
- Physics
- 26 May 2009
We revisit the question of the nature of ultraluminous X-ray sources (ULXs) through a detailed investigation of their spectral shape, using the h ighest quality X-ray data available in the XMM-Newton… Expand
Intrinsic disc emission and the soft X‐ray excess in active galactic nuclei
Narrow-line Seyfert 1 (NLS1) galaxies have low-mass black holes and mass accretion rates close to (or exceeding) Eddington, so a standard blackbody accretion disc should peak in the extreme… Expand
A periodicity of ∼1 hour in X-ray emission from the active galaxy RE J1034+396
- M. Gierliński, M. Middleton, M. Ward, C. Done
- Physics, Medicine
- Nature
- 18 September 2008
Active galactic nuclei and quasars are thought to be scaled-up versions of Galactic black hole binaries, powered by accretion onto supermassive black holes with masses of 106–109 , as opposed to the… Expand
Simultaneous X-ray and 7-ray observations of Cyg X-1 in the hard state by Ginga and OSSE
- M. Gierliński, A. Zdziarski, +5 authors B. Phlips
- Physics
- 21 October 1996
We present four X-ray/gamma-ray spectra of Cyg X-1 observed in the hard ('low') state simultaneously by Ginga and GRO/OSSE on 1991 July 6. The 3-30 keV Ginga spectra are well represented by power… Expand
HARD X-RAY EMISSION FROM LOW-MASS X-RAY BINARIES
- D. Barret, J. Olive, L. Boirin, C. Done, G. Skinner, J. Grindlay
- Physics
- 3 November 1999
We report on Rossi X-Ray Timing Explorer observations of four type I X-ray bursters, namely, 1E 1724-3045, GS 1826-238, SLX 1735-269, and KS 1731-260. The first three were in a low state, with 1-200… Expand
Black hole accretion discs: reality confronts theory
- M. Gierliński, C. Done
- Physics
- 17 July 2003
Disc spectra from highly luminous black hole binaries are observed to be rather simple, despite theoretical predictions to the contrary. We collate the disc-dominated spectra from multiple… Expand
The 1989 May outburst of the soft X‐ray transient GS 2023+338 (V404 Cyg)
- P. Życki, C. Done, D. S. Durham, U. Leicester, Camk
- Physics
- 22 April 1999
We reanalyse archival Ginga data of the soft X-ray transient source GS 20231338 covering the beginning of its 1989 May outburst. The source showed a number of rather unusual features: very high and… Expand
An ionized accretion disk in Cygnus X-1
- C. Done, J. Mulchaey, R. Mushotzky, K. Arnaud
- Physics
- 10 August 1992
Results of an analysis of archival Exosat and HEAO 1-A2 observations of Cyg X-1 are presented. It is found, in agreement with Ebisawa (1991), that the X-ray spectrum of Cyg X-1 exhibits a… Expand
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