Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..330..469a&link_type=abstract
The Astrophysics of Cataclysmic Variables and Related Objects, Proceedings of ASP Conference Vol. 330. Edited by J.-M. Hameury a
Astronomy and Astrophysics
Astrophysics
Scientific paper
We present time-resolved optical spectroscopy and photometry of three new relatively bright (V˜14.0-15.5) long-period cataclysmic variables discovered in the Hamburg Quasar Survey: HS 0139+0559, HS 0229+8016 and HS 0506+7725. The orbital periods, 243.2±0.4 min, 233±1 min and 212.6±0.1 min, are determined from radial velocity studies. The light curve of HS 0506+7725 is characterised by flickering. HS 0229+8016 and HS 0139+0559 display practically no photometric variability. Whereas HS 0506+7725 is a weak X-ray emitter in the ROSAT All Sky Survey, HS 0229+8016 and HS 0139+0559 were not detected. The identification of these three systems underlines that the currently known sample of CVs is likely incomplete even for bright systems.
Aungwerojwit A.
Engels Dieter
Fried Barry
Gänsicke Boris T.
Hagen Hans-Juergen
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