The ultraluminous X-ray source, NGC 5408 X-1, is one of only three such objects to show a
quasi-periodic oscillation (QPO) in its power spectrum. Previous analysis of this signal …

… disk–jet coupling studies and in doing so will significantly expand our understanding of …
This research has also made use of data obtained from NASA’s Swift and Chandra satellites…

A new, transient ultraluminous X-ray source (ULX) was recently discovered by Chandra in
M31 with a luminosity at ∼5 � 10 39 erg s −1 . Here we analyse a series of five subsequent …

… of absorption in the line of sight by an outflowing, optically thin phase of a supercritical wind,
then by making some basic assumptions we can model these features using a table made …

… In the previous subsection, we made predictions for how a source's spectral and variability
properties should appear for a given inclination and how they might change in response to …

… uncertainty in this picture which requires general relativistic (radiation) magneto-hydrodynamic
(GR(R)MHD) simulations of the misaligned supercritical flow (which will be performed in …

… the ULX regime (Middleton et al. 2013; Middleton, Miller-Jones … erg s −1 ; Sutton, Roberts &
Middleton 2013) are probably … (Middleton et al. 2012; Straub, Done & Middleton 2013). ULXs …

The bright ultraluminous X-ray source (ULX), M33 X-8, has been observed several times by
XMM–Newton, providing us with a rare opportunity to ‘flux bin’ the spectral data and search …

… We performed photometry on these objects using the daophot ii/allstar software package (Stetson
1987), a PSF-fitting routine (see Section 3.3), although due to the crowded nature of …

The bright X-ray source 2XMMi J180438.7−145647 is fortunate to have long baseline
observations in INTEGRAL that complement observations taken by other missions. Optical …