Time-tag ultraviolet data obtained on the Hubble Space Telescope in 2013 reveal interesting variability related to the white dwarf spin in the two cataclysmic variables RZ Leo and CC Scl .
RZ Leo shows a period at 220 s and its harmonic at 110 s , thus identifying it as a likely Intermediate Polar ( IP ) .
The spin signal is not visible in a short single night of ground based data in 2016 , but the shorter exposures in that dataset indicate a possible partial eclipse .
The much larger UV amplitude of the spin signal in the known IP CC Scl allows the spin of 389 s , previously only seen at outburst , to be visible at quiescence .
Spectra created from the peaks and troughs of the spin times indicate a hotter temperature of several thousand degrees during the peak phases , with multiple components contributing to the UV light .