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Time-tag ultraviolet data obtained on the Hubble Space Telescope in 2013reveal interesting variability related to the white dwarf spin in the twocataclysmic variables RZ Leo and CC Scl. RZ Leo shows a period at 220s and itsharmonic at 110s, thus identifying it as a likely Intermediate Polar (IP). Thespin signal is not visible in a short single night of ground based data in2016, but the shorter exposures in that dataset indicate a possible partialeclipse. The much larger UV amplitude of the spin signal in the known IP CC Sclallows the spin of 389s, previously only seen at outburst, to be visible atquiescence. Spectra created from the peaks and troughs of the spin timesindicate a hotter temperature of several thousand degrees during the peakphases, with multiple components contributing to the UV light.

Hubble Space Telescope Ultraviolet Light Curves Reveal Interesting Properties of CC Sculptoris and RZ Leonis