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Time-resolved low resolution Hubble Space Telescope ultraviolet spectratogether with ground-based optical photometry and spectra are used to constrainthe temperatures and pulsation properties of six cataclysmic variablescontaining pulsating white dwarfs. Combining our temperature determinations forthe five pulsating white dwarfs that are several years past outburst with pastresults on six other systems shows that the instability strip for accretingpulsating white dwarfs ranges from 10,500-15,000K, a wider range than evidentfor ZZ Ceti pulsators. Analysis of the UV/optical pulsation properties revealssome puzzling aspects. While half the systems show high pulsation amplitudes inthe UV compared to their optical counterparts, others show UV/optical amplituderatios that are less than one or no pulsations at either wavelength region.

Finding the Instability Strip for Accreting Pulsating White Dwarfs from HST and Optical Observations