Cyclic changes of the quasar brightness according to the ln(1+z) parameter

Cyclic change of the quasars brightness in function of ln(1+z) is revealed with the help of the correlation analysis method. It is found that the period of this change is equal to 0.190+-0.002 and the correlation function is equal to 0.76+-0.09. The brightness curve depending on the phase of the period to within 0sub(m)x0.5 is constructed. The brightness variations do not exceed 1sup(m). According to the extremum width of the curve, a conclusion is drawn that quasar red shifts must be either purely cosmological or completely proper