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Bowen blend echo-tomography of low mass X-ray binaries
T. Muñoz-Darias, I. G. Martinez-Pais, J. Casares +7
We present simultaneous high time resolution (1-10 Hz) X-ray and optical observations of the persistent LMXBs Sco X-1 and V801 Ara(=4U 1636-536). In the case of Sco X-1 we find tha…
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…
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…
The binary properties of the pulsating subdwarf B eclipsing binary PG 1336-018 (NY Vir)
M. Vučković, C. Aerts, R. Østensen +5
We present an unbiased orbit solution and mass determination of the components of the eclipsing binary NY Vir as a critical test for the formation scenarios of subdwarf B stars. We…
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,…
Echoes from the companion star in Sco X-1
T. Muñoz-Darias, I. G. Martinez-Pais, J. Casares +5
We present simultaneous X-ray (RXTE) and optical (ULTRACAM) narrow band (Bowen blend/HeII and nearby continuum) observations of Sco X-1 at 2-10 Hz time resolution. We find that the…