SW Sextantis stars: the dominant population of cataclysmic variables with orbital periods between 3 and 4 h

@article{RodrguezGil2007SWSS,
  title={SW Sextantis stars: the dominant population of cataclysmic variables with orbital periods between 3 and 4 h},
  author={P. Rodr{\'i}guez-Gil and B. Gaensicke and H. Hagen and S. Araujo-Betancor and A. Aungwerojwit and C. Prieto and D. Boyd and J. Casares and D. Engels and O. Giannakis and E. Harlaftis and J. Kube and H. Lehto and I. G. Mart{\'i}nez-Pa{\'i}s and R. Schwarz and W. Skidmore and A. Staude and M. Torres},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2007},
  volume={377},
  pages={1747-1762}
}
We present time-series optical photometry of five new cataclysmic variables (CVs) identified by the Hamburg Quasar Survey (HQS). The deep eclipses observed in HS 0129+2933 (= TT Tri), HS 0220+0603 and HS 0455+8315 provided very accurate orbital periods of 3.35129827(65), 3.58098501(34) and 3.56937674(26) h, respectively. HS 0805+3822 shows grazing eclipses and has a likely orbital period of 3.2169(2) h. Time-resolved optical spectroscopy of the new CVs (with the exception of HS 0805+3822) is… Expand
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