5 papers · 1 filter
A multicolor near-infrared study of the dwarf nova IP Peg
T. Ribeiro, R. Baptista, E. T. Harlaftis +2
We report the analysis of light curves of the eclipsing dwarf nova IP Peg in quiescence. The light curves are dominated by the ellipsoidal variation of the mass-donor sta…
SDSS J150722.30+523039.8: a CV formed directly from a detached white dwarf/brown dwarf binary?
S. P. Littlefair, V. S. Dhillon, T. R. Marsh +3
We present high-speed, three-colour photometry of the eclipsing cataclysmic variable SDSS J150722.30+523039.8 (hereafter SDSS J1507). This system has an orbital period of 66.61 min…
Roche tomography of cataclysmic variables - IV. Starspots and slingshot prominences on BV Cen
C. A. Watson, D. Steeghs, T. Shahbaz +1
We present Roche tomograms of the G5-G8 IV/V secondary star in the long-period cataclysmic variable BV Cen reconstructed from MIKE echelle data taken on the Magellan Clay 6.5-m tel…
Outbursts of EX Hydrae Revisited
N. Mhlahlo, D. A. H. Buckley, V. Dhillon +3
We present optical spectroscopy of EX Hya during its 1991 outburst. This outburst is characterised by strong irradiation of the front face of the secondary star by the white dwarf,…
ULTRACAM: an ultra-fast, triple-beam CCD camera for high-speed astrophysics
V. S. Dhillon, T. R. Marsh, M. J. Stevenson +15
ULTRACAM is a portable, high-speed imaging photometer designed to study faint astronomical objects at high temporal resolutions. ULTRACAM employs two dichroic beamsplitters and thr…