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PU CMa: superhump-like variations in post-outburst state? Dear Colleagues, We have received additional data from Lew Cook and Nakajima-san. The object has been also observed by the Kyoto team, Torii-san (RIKEN), and Okayama U. of Sci. team (and presumably by Kiyota-san). A preliminary analysis of the Feb. 16 data (object at 14-15 mag) is rather surprising. The light curve was dominated by large-amplitude variations (~0.3 mag). A preliminary period analysis has yielded a most likely period of 0.061+/-0.001 d, which is not inconsistent with the superhump-type variation. The phase-folded light curve shows a single-peaked profile (mean amplitude 0.3 mag), which is also reminiscient of superhumps. There also existed variations with shorter time scales, but they looked more aperiodic or quasi-periodic. Further observations are still encouraged to study the period structure of this ultrashort period bright dwarf nova. Regards, Taichi Kato VSNET Collaboration team
Return to the Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
