55 citations · 216 across the 15 of their papers we have counts for
6 papers · 2 filters
Chandra observations of the globular cluster M54
Gavin Ramsay, Kinwah Wu
We have carried out a Chandra observation of the globular cluster M54. We detected 7 sources located within the half-mass radius of M54, at a flux limit of 1.5x10^-15 erg/s/cm in t…
XMM-Newton observations of AM CVn binaries
Gavin Ramsay, Pasi Hakala, Tom Marsh +3
We present the results of XMM-Newton observations of four AM CVn systems -- AM CVn, CR Boo, HP Lib and GP Com. Their light curves show very different characteristics. The X-ray lig…
Two-temperature accretion flows in magnetic cataclysmic variables: Structures of post-shock emission regions and X-ray spectroscopy
Curtis Saxton, Kinwah Wu, Mark Cropper +1
We use a two-temperature hydrodynamical formulation to determine the temperature and density structures of the post-shock accretion flows in magnetic cataclysmic variables (mCVs) a…
XMM-Newton EPIC and OM Observations of Her X-1 over the 35 d Beat Period and an Anomalous Low State
S. Zane, G. Ramsay, M. A. Jimenez-Garate +4
We present the results of a series of XMM-Newton EPIC and OM observations of Her X-1, spread over a wide range of the 35 d precession period. We confirm that the spin modulation of…
RApid Temporal Survey - RATS I: Overview and first results
Gavin Ramsay, Pasi Hakala
We present the aim and first results of the RApid Temporal Survey (RATS) made using the Wide Field Camera on the Isaac Newton Telescope. Our initial survey covers 3 square degrees,…
High-speed, energy-resolved, STJ observations of the AM Her system V2301 Oph
A. P. Reynolds, G. Ramsay, J. H. J. de Bruijne +4
We present high time-resolution optical energy-resolved photometry of the eclipsing cataclysmic variable V2301 Oph made using the ESA S-Cam detector, an array of photon counting su…