Binary components are characterized by flux ratio, entropy, and the maximum S/N of the background-normalized PDS. The upper right panel shows the distribution of flux ratios against the maximum S/N differences, with points color-coded by entropy differences. The adjacent histograms show the respective distributions. The lower left panel shows the entropy difference distribution. The colors of the histograms have the same meaning as in Fig. 4, with dotted gray lines representing all binary components and the vertical lines indicating the medians.