Dear colleagues, we performed V band CCD photometry of GK Per at Nicholas Copernicus Observatory & Planetarium in Brno. There are clearly visible light modulations on light curve (http://vsnet.ian.cz/cba). The run was stop by clouds as seen on standard deviations plotted there. With best regards Rudolf P.S. We wait for another clear night to continue on T Leo and GK Per photometry. If you would like to see light curves of outgoing outburst of CT Hya obtained at Brno see CBA Brno page.