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DA white dwarfs in Sloan Digital Sky Survey Data Release 7 and a search for infrared excess emission

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Figure

Table 1. Colour selection for finding DA white dwarfs in ugriz space. Objects were selected to be primary objects and point sources.Flags are shown in Hexagesimal notation
Table 2. Efficiency and completeness of the polynomial colour-colour cuts (Table 1) as a function of SDSSof spectroscopic objects that matched our selection and were visually classified was 7444
Figure 3. The spectroscopic completeness of DA white dwarfs in SDSS DR7 within the (spectroscopically confirmed DA white dwarfs and contaminants within our colour selection are shown in the upper middle andof our selection algorithm (lower middle panel)
Figure 7. A demonstration of the systematically lower measured photometric effective temperatures
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