Superhumps of CC Cancri Revisited

Abstract

Abstract We observed the 2001 November superoutburst of CC Cnc. This observation represents the first detailed coverage of a superoutburst of this object. The best-determined mean superhump period is $0.075518 \pm 0.000018 \,\mathrm{d}$, which is 2.7% longer than the reported orbital period. This fractional superhump excess is a quite typical value for a normal SU UMa-type dwarf nova, excluding the previously raised possibility that CC Cnc may have an anomalously large fractional superhump excess. During the superoutburst plateau, the object showed a decrease of the superhump period at $\dot{P}/P =-10.2 \pm 1.3 \times 10^{-5}$, which is one of the largest negative period derivatives known in all SU UMa-type dwarf novae.