RE0751 + 14, the first ‘intermediate’ polar?

We present optical spectroscopy, multicolour photometry and polarimetry of the new intermediate polar, RE0751+14, discovered during the ROSAT WFC survey. The wings of its emission lines exhibit radial velocity motion with a period ∼13.9 min, confirming that this is the rotation period of the white dwarf. Intriguingly, the R- and I-band photometric light curves reveal a double-peaked profile at the rotation period. In contrast, the B-band light curve, at least in our longest (∼5 h) time-series in that colour, is apparently dominated by a 14.5-min, broadly sinusoidal pulsation. There is supporting evidence from a short NOT observation at an earlier epoch that a modulation with a slightly longer period than the rotation period makes an increasing contribution at blue wavelengths