Amplitude spectra with confidence levels of the new ZZ Ceti stars: (a) J004628, (b) J062159, (c) J010302, (d) J013033, and (e) the case for J004628 after prewhitening with the highest peak. The 95%, 99%, and 99.9% confidence levels and the ﹩4\langle A\rangle ﹩ levels are marked with the dashed, dotted, dashed–dotted, and solid lines, respectively.