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V585 Lyr: definitely positive superhump derivative Dear Colleagues, The VSNET Collaboration has received new data from Tom Krajci, Jochen Pietz, Lew Cook, and Arto Oksanen. The entire data are getting more and more impressive! The amplitude of superhumps decreased to 0.1 mag (or even less), but the waveform is conserved (no prominent phase reversal or secondary humps appeared). The timing analysis of the superhump maxima has yielded a definite positive dot(P)/P = +9x10^(-5). The times of superhumps have been well expressed by a single positive period derivative. The mean superhump period up to now is 0.06039 d, though this average is best regarded as a simple measure in the presence of a large period change. The overall variation strongly resembles that of SW UMa in 1996 (Semeniuk et al. 1997, Acta Astron. 47, 201; Nogami et al. 1998, PASJ 50, 297). The object is expected to rebrighten in very near future, and we will see the renewed growth of superhumps. Please keep the current excellent coverage! Regards, Taichi Kato VSNET Collaboration team
Return to the Powerful Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
