Locations of the primary (S₁) and secondary (S₂) source stars in the instrumental color-magnitude diagram (CMD). The pair of the filled blue and green dots denote the positions of S₁ and S₂ based on the wide 2L2S solution, and the pair of the empty dots indicate the positions based on the close 2L2S solution. The red filled dot denotes the centroid of red giant clump (RGC). The HST CMD (brown dots) is presented to show the source locations in the main-sequence branch.