2009A&A...502....1T

We characterize the flickering observed in the optical light curve of the intermediate polar system V709 Cas by determining its position in the α-Σ diagram of Fritz and Bruch classification scheme. The strength of flickering on a given timescale is represented by Σ, while α is the energy distribution of the flickering at different timescales. Here α is derived independently with both the wavelets and the Hurst R/S analysis. The flickering shows self-similarity on a timescale ranging from tens of minutes down to 10s with stochastic persistent memory in time. The parameters α and Σ appear to be anticorrelated. In the α-Σ diagram, V709 Cas occupies in the region of magnetic systems. Since V709 Cas shows the spin period of the magnetic WD only in the X-ray but not in the optical, we conclude that this method can be used to characterize CV subtypes especially when their classification is uncertain.