We revisit the question of the nature of ultraluminous X-ray sources (ULXs) through a detailed
investigation of their spectral shape, using the highest quality X-ray data available in the …

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 …

We present the preliminary results of two Gemini campaigns to constrain the mass of the black
hole in an ultraluminous X‐ray source (ULX) via optical spectroscopy. Pilot studies of the …

We explore the nature of ultraluminous X‐ray sources through detailed investigations of their
spectral shape using some of the highest quality data available in the XMM‐Newton public …

We present a photometric survey of the optical counterparts of ultraluminous X-ray sources (ULXs)
observed with the Hubble Space Telescope (HST) in nearby (≲ 5 Mpc) galaxies. Of …

… By accounting for the accretion disc, Gladstone et … stellar features in the optical and near
infrared (NIR) to settle the debate on the masses of these black holes (Gladstone et al. in …

Although a great deal of progress has been made towards understanding the nature of
ultraluminous X‐ray sources (ULXs) over the past decade, many basic issues remain to be settled…

We present the results from an X-ray and optical study of a new sample of eight extreme
luminosity ultraluminous X-ray source (ULX) candidates, which were selected as the brightest …

Guided by the Behavioral Vaccine Theory of prevention, this study uses a no-control group
design to examine intervention variables that predict favorable changes in depressive …

Environmental management in coastal ecosystems has been challenged by the complex
cumulative effects that occur when many small issues result in large ecological shifts. Current …