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Mukadam, Anjum S; Mullally, F; Nather, R. E; Winget, D. E; von Hippel, Ted; Kleinman, S. J; Nitta, Atsuko; Krzesiński, Jurek; Kepler, S. O; Kanaan, A; Koester, D; Sullivan, D. J; Homeier, D; Thompson, S. E; Reaves, D; Cotter, C; Slaughter, D; Brinkmann, J
The Astrophysical journal, 06/2004, Letnik: 607, Številka: 2Journal Article
We present 35 new pulsating da (hydrogen atmosphere) white dwarf stars discovered from the Sloan Digital Sky Survey (SDSS) and the Hamburg Quasar Survey (HQS). We have acquired high-speed time series photometry of preselected da white dwarfs with a prime focus CCD photometer on the 2.1 m telescope at McDonald Observatory over 15 months. We selected these stars on the basis of prior photometric and spectroscopic observations by the SDSS and HQS. For the homogeneous SDSS sample, we achieve a success rate of 80% for finding new variables at a detection threshold of 0.1%-0.3%. With 35 newly discovered da variable white dwarfs, we almost double the current sample of 39.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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