[vsnet-alert 12201] SDSS J080434.20+510349.2 superhumps and eclipses

Taichi Kato tkato at kusastro.kyoto-u.ac.jp
Sun Sep 26 10:00:34 JST 2010


SDSS J080434.20+510349.2 superhumps and eclipses

   Maehara-san, Okayama U. of Sci. team, Denis Denisenko, Kyoto team
(Ohshima-san) have reported further observations.  As already reported,
well-established ordinary superhumps are now visible.  The mean period
since Sep. 24 has been 0.05932(1) d.  This period appears to express
one of two double-humps on Sep. 22, but does not fit the times of maxima
on Sep. 23.  The profile of ordinary superhumps is more structured
than in other non-eclipsing SU UMa-type dwarf novae.  This is likely
due to the presence of shallow, broad eclipses centered at expected epochs
of eclipses.  The eclipses were about 0.1 mag deep and asymmetric (slower
ingress).  These eclipses also appear to comprise one of minima during
the early-superhump stage.  More detailed analysis and further observations
are absolutely needed to clarify the nature of all these features.


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