BELGIAN ASTRONOMICAL SOCIETY V.V.S. - Working Group Variable Stars Cataclysmic Variables Circular No.109 1996, September 16 Ed.: T. Vanmunster, Walhostraat 1A, 3401 Landen, BELGIUM Internet: tvanmuns@innet.be TEL. 32-11-831504 -------------------------------------------------------------- The CATACLYSMIC VARIABLES Home Page: http://www.cv.psi.edu =================================================================== PV Per [UGSU, 14.9p - 20:p] =========================== Photometry of PV Per on 1996, September 15/16 at the Center for Backyard Astrophysics Belgium (using a 25-cm SCT with unfiltered ST-7 CCD) clearly reveals the existence of superhumps with a semi- amplitude of 0.18 mag. Determination of the superhump period is rather difficult due to the short observing window and the presence of low clouds. The most probable period is 112 min (PDM), a value that will need further refinement. Follow-up observations at different longitudes are highly encouraged. We plan another photometry session on PV Per tonight. Our set of observations finally revealed the SU UMa type nature of this dwarf nova ! The present outburst of PV Per (a CVAP object) was detected by Eric Broens, Mol, Belgium [CVC 108]. Thanks Eric, for the early notification ! Tonny Vanmunster CBA-Belgium Observatory