The Ultraluminous State (2009)
Gladstone, J. C., Roberts, T. P., Done, Chris
(Abridged) We revisit the question of the nature of ULXs through a detailed investigation of their spectral shape, using the highest quality X-ray data available in the XMM-Newton public archives. We...
The ultraluminous X-ray source population of NGC 4485/4490 (2009)
Gladstone, J. C., Roberts, T. P.
We report the results of spectral and temporal variability studies of the ultraluminous X-ray sources (ULXs) contained within the interacting pair of galaxies NGC 4485/4490, combining Chandra and...