[vsnet-alert 13633] CD Ind : interesting variations

[Ohshima]

CD Ind : interesting variations!

 We have received 9 nights observations of a polar CD Ind from 
Josch Hambsch.
 These observations shows very interesting behavior. This object
showed two phases, the bright phase (16 mag) and the faint 
phase (18 mag). Differeint from the high-low state of polar,
the span CD Ind stayed at the each extreme was short, as long
as observations of 9 nights.
Furthermore, this object showed apparently variations with the 
amplitude of ~0.5 mag like superhumps around Aug 21. 
This variations had weakened on Aug 26, when this object was
brightest. Insteadly sharper and narrower maxima appeared.
Considering the interval of maxima, first variations seem to
be a little longer than the orbital period, implying superhumps.
Meanwhile second variations is nealy consistent with the orbital
period (using the linear analysis, 0.07660 d was obtained).
The first variations appear to have remained on Aug 26 as
secondary peak but further weakened after that. 

 Since polars do not have a disk, superhumps cannot be exist.
Since this object is "immature" polar, this behavior may be
related to this nature.