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14 papers · 2 filters
Phase-resolved spectroscopy of the helium dwarf nova 'SN 2003aw' in quiescence
G. Roelofs, P. Groot, T. Marsh +2
High time resolution spectroscopic observations of the ultra-compact helium dwarf nova 'SN 2003aw' in its quiescent state at V=20.5 reveal its orbital period at 2027.8 +/- 0.5 seco…
A ZZ Ceti white dwarf in SDSS J133941.11+484727.5
B. T. Gaensicke, P. Rodriguez-Gil, T. R. Marsh +19
We present time-resolved spectroscopy and photometry of the cataclysmic variable (CV) SDSSJ133941.11+484727.5 (SDSS1339) which has been discovered in the Sloan Digital Sky Survey D…
ULTRACAM photometry of the eclipsing cataclysmic variables GY Cnc, IR Com and HT Cas
W. J. Feline, V. S. Dhillon, T. R. Marsh +2
We present high-speed, three-colour photometry of the eclipsing cataclysmic variables GY Cnc, IR Com and HT Cas. We find that the sharp eclipses in GY Cnc and IR Com are due to ecl…
Detection of a period decrease in NN Ser with ULTRACAM: evidence for strong magnetic braking or an unseen companion?
C. S. Brinkworth, T. R. Marsh, V. S. Dhillon +1
We present results of high time resolution photometry of the eclipsing pre-cataclysmic variable NN Ser. We observed 13 primary eclipses of NN Ser using the high-speed CCD camera UL…
Ultraviolet studies of interacting binaries
B. T. Gaensicke, D. de Martino, T. R. Marsh +4
Interacting Binaries consist of a variety of stellar objects in different stages of evolution and those containing accreting compact objects still represent a major challenge to ou…
Subdwarf B binaries in the Edinburgh-Cape Survey
L. Morales-Rueda, P. F. L. Maxted, T. R. Marsh +2
We give an update of the results of a campaign to obtain orbital solutions of subdwarf B stars from the Edinburgh-Cape survey (Stobie et al. 1997). To date we have obtained blue sp…