Fig. 1.
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CMD diagram of NUV − r vs. Mr. The gray dots and black contours represent the entire galaxy sample from which we selected our sample of passive galaxies. The sample of galaxies is from the SDSS. The black solid line is the best-fit color-magnitude relation defined by Haines et al. (2008), and the black dashed line is parallel to the former line, but displaced by a distance of 1σ.
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