De-reddened r magnitudes and hard X-ray (2.3–5 keV) fluxes for the hard sample. All hard sources with p_any less than the threshold of 0.033 are shown as blue unfilled circles, and sources with good p_any are shown as blue filled circles. Hard-only sources with p_any less than the threshold of 0.061 are shown as orange unfilled squares, and hard-only sources with good p_any are shown as orange filled squares. A 99% purity cut on p_any at 0.61 is also applied, and these sources are shown as dark red filled squares.