SDSS r vs. r−i diagram plotted as a two-dimensional stellar-density histogram using a binning of 0.01 × 0.01 and a 7 level color-coded scale such that high source densities (70 per bin) are dark-green and the lowest densities (one per bin) are blue. The magenta solid line is the 10 Myr PISA isochrone, assuming a distance of 750 pc and E(B − V) = 0.2. Objects with Hα excesses are drawn as magenta circles.