[vsnet-outburst 8458] Unusual modulations of CH UMa

[Ohshima]

Unusual modulations of CH UMa

Dear colleagues,

We have received time-series data of CH UMa from Pavol A. Dubovsky
obtained on 14th of Jan.
 The yielded data show short period modulations with amplitude about 0.05 
mag and dips with amplitude 0.05mag.
 With PDM method, the best estimated period of these modulations is
 0.1447(6)d. Although this period seems to derive from dips as far as 
watching light curve, it is uncertain. It is also uncertain what these
modulations stems from.