UV Per rapid fading Dear Colleagues (on behald of Iwamatsu-san), The analysis of the Jan. 4 data confirms the rapid fading suggested by visual observations. The object faded by 0.5 mag between Jan. 3 and 4. The duration of superoutburst plateau is relatively short in such a rarely outbursting SU UMa-type star. Intensive observations are uegently requested at this and coming very important stage. We may expect post-superoutburst rebrightening as experiened in past UV Per outburst. Regards, VSNET Collaboration team