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RX Vol: definite SU UMa-type dwarf nova with fully grown superhumps! Dear Colleagues, We have received further data from Roland Santallo and Peter Nelson. As Peter Nelson reported in [vsnet-outburst 5502], the star now exhibits decisive superhumps with a mean amplitude of 0.22 mag. (Representative superhump light curve) http://vsnet.kusastro.kyoto-u.ac.jp/pub/vsnet/DNe/RX_Vol/rxsh.gif The period determined from the May 5 data is 0.0613(2) d, which confirms the earlier suggestion that RX Vol belongs to short-period SU UMa stars. The earlier emergence of a seemingly slightly shorter period may represent a variety of "early superhumps", which was suspected in T Leo with Psh = 0.0602 d (Kato 1997, PASJ 49, 583). Please note that EG Cnc (WZ Sge-type star) also has a similar period (Psh = 0.06038 d). Combined with the presumably large outburst amplitude, RX Vol is expected to show some sort of similar activities (Psh increase, rebrightening etc.) as seen in WZ Sge stars. Further continued observations are very strongly encouraged!! Regards, Taichi Kato VSNET Collaboration team
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