[vsnet-alert 6511] WZ Sge: at the fifth rebrightening maximum

[Taichi Kato <tkato>]

WZ Sge: at the fifth rebrightening maximum

Dear Colleagues,

   D. Starkey has reported the latest data, covering the rise to and the
maximum of the fifth rebrighetening.  The phase analysis, after removing
the general trends, has yielded very weak periodic signals.  Eclipses are
no longer prominent.  The strongest hump signal (about 0.05 mag in average)
resides just after the eclipse times.  It may be that altough superhumps
may have newly grown, their existence may have been masked by the eclipse
effect.  If this possibility is confirmed by the following observations,
the present hump phase suggests that either superhumps have newly appeared,
or developed from the "pre-eclipse" hump signal predominantly seen in
the Aug. 28 data.  The latter interpretation may naturally explain the
apparent absence of the strong hump signal in the Aug. 29 data.
The present superposition of hump and eclipse phases at maximum is the
first-ever seen during the rebrightening stage.  Observers are requested
to closely follow the evolution of eclipses and humps in order to determine
the geometry of the eclipsed source.

Regards,
Taichi Kato
VSNET Collaboration team

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp