Searching for Planets with White Dwarf Pulsations: Spurious Detections
  We present 13 years of pulsation timing measurements of the DBV white dwarf EC 2005-5234. Each of the four O-C diagrams mimic the sinusoidal behavior typically attributed to a planet + WD system. However, the amplitude and phase of the O-C variations are inconsistent with each other. We discuss the impact of this result on timing based WD planet searches. 
J. Dalessio, J.L. Provencal, H.S. Shipman
astro-ph.EP