2012BAVSR..61....2R

CCD observations were taken at my backyard observation site in Koestenberg, Ossiacher Tauern, Austria. During 5 nigths 552 observations were collected in infrared filter Ic, 211 observations in Johnson/Cousins filter B and V. RZ Cas is a semi-detached eclipsing binary system of the Algol-type. The primary component is of spectral class A3V, the secondary is found to be of K0-K4IV [1]. RZ Cas is an example for a binary system in which the primary star is unevolved and the secondary star overflowing its Roche lobe and causing mass transfer to the evolved star [2]. G. Miller discovered its variabillity in 1906. It has an deep primary eclipse in optical wavelenght V=6.18 mag of Delta 1.5 mag. I present complete lightcurves in filter Ic with two primary- and one secondary minima: first primary Min at JD 2455817.39478, the secondary primary Min at 2455829.34656, the secondary minima is at phase 0.5. In following lightcurve is also seen the reflection effect near phase 0.5 and a hump between phase 0.1 - 0.2.