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V803 Cen: oscillation continues Dear Colleagues, We have received new data from Greg Bolt. During the 6-hr observation, V803 Cen initially faded, but reached a minimum around June 14.65 UT. The amplitude of the continuing oscillation is slightly less than 1 mag. The maxima of the oscillations have been linearly fading at a mean rate of 0.1 mag/d, which is on a smooth extension from the initial superoutburst plateau. The overall behavior (period and amplitude) of the current oscillation stage is _stikingly similar_ to the "post-dip" behavior of WZ Sge observed during its 2001 superoutburst. The overall bahevior since the start of the superoutburst resembles that of the later half of the WZ Sge superoutburst (pre-dip to oscillation stage). This analogy may suggest that the outburst of a helium dwarf nova can be understood as an extension of the WZ Sge-type outbursts (see also Osaki and Meyer 2003, A&A 401, 325 for the modern view of the WZ Sge-type outbursts). Regards, Taichi Kato VSNET Collaboration team
Return to the Powerful Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
