Color–magnitude diagram of the A514 field. Red dots represent spectroscopically confirmed members (0.05 < z < 0.09) from the NASA/IPAC Extragalactic Database, and blue dots represent the background sources after applying the source criteria. Green dots represent photometric member candidates selected through the red sequence (dashed gray line). Many of the PSF stars, denoted as cyan dots, exhibit a horizontal locus redder than the cluster red sequence.