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Ultraviolet observations using the Solar Blind Channel on the Hubble SpaceTelescope provide light curves and low resolution spectra of three pulsatingwhite dwarfs in the cataclysmic variables SDSS013132.39-090122.3,SDSSJ161033.64-010223.3 and SDSSJ220553.98+115553.7. The UV light curves showenhanced pulsation amplitudes over those from simultaneous and previous opticalphotometry, while the UV-optical spectra are fit with white dwarf temperaturesnear 15,000K. These temperatures place the accreting white dwarfs outside theinstability zone for non-interacting DAV white dwarfs and show that theinstability strip is complex for accreting white dwarfs.Comment: 28 pages, 11 figure

Hubble Space Telescopeand Optical Observations of Three Pulsating Accreting White Dwarfs in Cataclysmic Variables