R R Pictoris:an old nova show ing superhum ps and Q PO s
2013
A B ST R A C T W e present tim e{resolved V{photom etry of the old nova RR Pic.Apart from the hum p{like variability,the light curves show the strong ickering and random vari- ation typicalforRR Pic.W e do notnd any convincing evidence forthe previously reported eclipse.Theextrapolated eclipsephasecoincideswith abroad m inim um ,but com paringtheoverallshapeofthelightcurvesuggeststhattheeclipseshould actually belocated aroundphase0.2.Theorbitalperiod which wederivefrom thesedataagrees wellwith the old one,any uncertainty istoo sm allto accountforthe possible phase shift.Apartfrom the3.48h period,which isusually interpreted astheorbitalone,we �nd an additionalperiod at P = 3:78h,which weinterpretasthe superhum p period ofthesystem ;thecorrespondingprecession period at1.79d isalsopresentin thedata. W ealsond indicationsforthepresenceofa 13m in quasi{periodicoscillation. K ey w ords: Physicaldata and processes:accretion,accretion discs{ stars:novae, cataclysm icvariables{ individual:RR Pic.
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