Upper panel: color–magnitude diagram (CMD) for the 44′ × 44′ M 48 cluster region of our study in Johnson B − V color. A cluster sequence, beginning brighter than V = 10 and extending diagonally downward to V ~ 19, is seen clearly against the field population. Lower panel: large filled gray circles (green online) in the M 48 CMD indicate cluster members identified by BJG05, based on astrometry brighter than V = 13, and multi-color Stromgren photometry for fainter stars. Most of these BJG05 members are clearly on the cluster sequence in our photometry. Stars proposed by BJG05 to be non-members are additionally indicated with crosses, while the remaining empty circles have no BJG05 membership information.