[vsnet-campaign-dn 1466] WZ Sge: hump and eclipse profiles on Sep. 1 (sixth rebrightening)

[Taichi Kato <tkato>]

WZ Sge: hump and eclipse profiles on Sep. 1 (sixth rebrightening)

Dear Colleagues,

   We have put on the VSNET WZ Sge page the figures representing the recent
variations of the hump and eclipse profiles.  Please note the dramatic
change of (super?)humps (phase and amplitude) and eclipses (phase and
profile) across the rebrightening.

   The phase of eclipses particularly changed to a great extent.  At maxmum,
the phase tended to be earlier than the predicted times.  Later during the
decline, the eclipses became quite asymmetric.

   The phase 0.8 hump (orbital hump??) grew again as the system faded.
However, the hump maxima were around phase 0.0 at the rebrightening maximum.
It may be that these humps (at phase 0.0; superhumps?) were different ones
from those at phase 0.8, and became strongest only when the system is close
to the maximum.  Close follow-up observations of these detailed structures
are naturally very wanted.  If the system brightens again (likely!),
the number of rebrightenings will break the record of post-superoutburst
rebrightenings!

Regards,
Taichi Kato
VSNET Collaboration team

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