[vsnet-alert 7613] NSV10934 superhump period update

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

NSV10934 superhump period update

Dear Colleagues,

   We have received further data from Peter Nelson and Chris Stockdale.
On January 6, the amplitude of the superhumps has become slightly smaller,
but strong superhumps are still present.

   The best superhump period is 0.07514(4) d, based on 2-day baseline
observation.  From these analyses, it is now evident that the superhump
timings have large O-C's during the earliest stage of the superhump
evolution.  The initially reported period (0.0743(8) d) is 1 percent
small than the superhump period.  It is most likely that a smooth transition
from early stage superhumps (period close to the orbital period) to
genuine superhumps occurred, as in the 1993 superoutburst of T Leo
(Kato 1997, PASJ 49, 583).  Such behavior may remind us of the WZ Sge-type
"early superhumps", but the singly peaked profile of NSV 10934 is
different from those of WZ Sge-type early superhumps.

   Further continous observations are strongly encouraged to follow the
full evolution of the superhumps in this unusual object!

Regards,
Taichi Kato
VSNET Collaboration team

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