Fast stochastic variability in CV variable V1504 Cyg and source identification

Highcadence longterm Kepler data of cataclysmic variables V1504Cyg, V344Lyrand MVLyr show multicomponent power density spectra of the fast stochasticvariability. The same is observed in Xrays in the case of SSCyg, RUPeg and,most recently, in MVLyr. Modelling studies allow a variety of accretingstructures as the source. However, conclusions based on a single wave bandremain ambiguous while we have achieved more robust conclusions from combinedoptical and Xray observations of the nova like MVLyr. The case of the dwarfnova V1504Cyg is more complex because it comprises quiescence and outbursts.Since it is technically impossible to obtain optical Kepler data of SSCyg orRUPeg, we propose to observe V1504Cyg with XMM. The goal is to search for the break freq. found in Kepler data. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]