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Determining the mass of the accreting white dwarf in magnetic cataclysmic variables using RXTE data
We have extracted spectra of 20 magnetic cataclysmic variables (mCVs) from the RXTE archive and best fitted them using the X-ray continuum method of Cropper et al. to determine the mass of theExpand
Possible detection of two giant extrasolar planets orbiting the eclipsing polar UZ Fornacis
We present new high-speed, multi-observatory, multi-instrument photometry of the eclipsing polar UZ For in order to measure precise mid-eclipse times with the aim of detecting any orbital periodExpand
RX J1914.4+2456: the first double-degenerate polar?
RX J1914.4 + 2456 exhibits a light curve with a strong modulation at 569 s: this period is characteristic of the white dwarf spin period in intermediate polar (IF) systems. However, the X-ray lightExpand
White dwarf masses in magnetic cataclysmic variables: multi-temperature fits to Ginga data
One method of obtaining the mass of the white dwarf in magnetic cataclysmic variables (mCVs) is through their hard X-ray spectra. However, previous mass estimates using this method give lower limitsExpand
RX J0806+15: the shortest period binary?
The X-ray source RX J0806+15 was discovered using ROSAT , and shows an X-ray light curve with a prominent modulation on a period of 321.5 s. We present optical observations in which we report theExpand
Optical/infrared spectroscopy and photometry of the short-period binary RX J1914+24
We present observations of the proposed double-degenerate polar RX J1914+24. Our optical and infrared spectra show no emission lines. This, coupled with the lack of significant levels ofExpand
An electrically powered binary star
We propose a model for stellar binary systems consisting of a magnetic and a non-magnetic white dwarf pair which is powered principally by electrical energy. In our model the luminosity is caused byExpand
XMM-Newton observations of polars in low accretion states
We have made a series of snap-shot observations of 37 polars using XMM-Newton. We found that 16 of these systems were in a low, or much reduced, accretion state. Of those, six were not detected inExpand
Detection of the optical counterpart of the proposed double degenerate polar RX J1914+24
We have detected the optical counterpart of the proposed double degenerate polar RX J1914+24. The I-band light curve is modulated on the 9.5-min period seen in X-rays. There is no evidence for anyExpand
XMM—Newton EPIC observations of Her X-1
We present spin-resolved X-ray data of the neutron star binary Her X-1 taken using the EPIC detectors on XMM‐Newton. The data were taken at three distinct epochs through the 35-d precession period.Expand