[vsnet-alert 6605] WZ Sge: strikingly different profile! (Sep. 10)

[Taichi Kato <tkato>]

WZ Sge: strikingly different profile! (Sep. 10)

Dear Colleagues,

   WZ Sge has shown another veru striking change in its orbital light curve!
The analysis of the most recent data (L. Cook) has revealed that the
profile has now become "sinusoidal", i.e. smooth maximum at phase 0.5
and minimum at phase slightly before 0.  The overall appearance of
the profile even resembles that of a reflection-type variable!
Although it is not unlikely that we are observing the illuminated surface
of the secondary star (reflection effect), the chance seems to be small
because the disk light should have dominated at present.  Anyway, such
a profile has not been observed so far even during the entire rebrigtening
period.  Observers are strongly requested to follow the evolution of
the light curve, and record the dramatic change!

   The representative light curves of the 11-th rebrightening have been
posted on the VSNET WZ Sge page.

Regards,
Taichi Kato
VSNET Collaboration team

VSNET Home Page

Return to Daisaku Nogami

---

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