Six New ZZ Ceti Stars from the SPY and the HQS Surveys
Voss, B., Koester, D., Ostensen, R., Napiwotzki, R., Homeier, D. and Reimers, D.
(2007)
Six New ZZ Ceti Stars from the SPY and the HQS Surveys.
In:
In: Procs of the 15th European Workshop on White Dwarfs - ASP Conf Series 372 :.
Astronomical Society of the Pacific, pp. 583-586.
ISBN 978-1-58381-239-6
We report on the discovery of six new ZZCeti stars. They were selected as candidates based on preparatory photometric observations of ob- jects from the Hamburg Quasar Survey (HQS), and based on the spectra of the Supernova Ia Progenitor Survey (SPY). Time-series photometry of 19 can- didate stars was carried out at the Nordic Optical Telescope (NOT) at Roque de Los Muchachos Observatory, Spain. The new variables are relatively bright, 15.4 < B < 16.6. Among them is WD 1150−153, which is the third ZZCeti star that shows photospheric CaII in its spectrum.
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