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The X-ray Spectrum of Cyg X-2
C. Done, P. T. Zycki, D. A. Smith
The spectra of disc accreting neutron stars generally show complex curvature, and individual components from the disc, boundary layer and neutron star surface cannot be uniquely id…
Phase-resolved X-ray spectroscopy of the millisecond pulsar SAX J1808.4-3658
Marek Gierlinski, Chris Done, Didier Barret
We present new results based on RXTE observations of SAX J1808.4-3658. The X-ray spectrum can be fitted by a two-component model. We interpret the soft component as blackbody emiss…
A comment on the colour-colour diagrams of Low Mass X-ray Binaries
Marek Gierlinski, Chris Done
Disc accreting neutron stars come in two distinct varieties, atolls and Z sources, named after their differently shaped tracks on a colour-colour diagram as the source luminosity c…
Testing models of X-ray reflection from irradiated disks
C. Done, S. Nayakshin
We model the reflected spectrum expected from localized magnetic flares above an ionised accretion disk. We concentrate on the case of very luminous magnetic flares above a standar…
On the complex disc-corona interactions in the soft spectral states of Soft X-ray Transients
P. T. Zycki, C. Done, D. A. Smith
Accreting black holes show a complex and diverse behaviour in their soft spectral states. Although these spectra are dominated by a soft, thermal component which almost certainly a…
Phase-resolved spectra of the millisecond pulsar SAX J1808.4-3658
Marek Gierlinski, Chris Done, Didier Barret
We analyze the RXTE observations of the April 1998 outburst of SAX J1808.4-3658. We show that the soft blackbody component of the X-ray spectrum is from the hotspot on the neutron…
Mapping the inner accretion disk of the galactic black hole J1550-564 through its rise to outburst
Colin D. Wilson, Chris Done
We study the spectral properties of the first 14 observations of the rise to outburst phase of the X-ray transient J1550-564. Using the PCA and HEXTE instruments, we find that the…