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XMM-Newton observations of the accreting, pulsating white dwarf in thequiescent dwarf nova GW Librae were conducted to determine if the non-radialpulsations present in previous UV and optical data affect the X-ray emission.The non-radial pulsations are evident in the simultaneous Optical Monitor databut are not detected in X-ray with an upper limit on the pulsation amplitude of0.092 mags. The best fits to the X-ray spectrum are with a low temperaturediffuse gas model or a multi-temperature cooling flow model, with a strongOVIII line, similar to other short period dwarf novae, but with a lowertemperature range than evident in normal short period dwarf novae. The lack ofpulsations and the spectrum likely indicate that the boundary layer does notextend to the surface of the white dwarf.

XMM-Newton Observations of the Cataclysmic Variable GW Lib