Comparison of Hipparcos V (top panel) and I magnitudes (bottom panel) with other photometric data included in Tables 1 and 2. The blue circles in both panels (labeled PD2010) are from SED fittings in Pickles & Depagne (2010), as explained in the text, the magenta diamonds are for APASS. The dotted vertical lines show the bright limits for reliable photometry of the APAS (V = 7) and ASAS (V = 8) surveys, as indicated. In the whole magnitude range covered by these figures, all ASAS-SN photometry is unreliable (note their large declared error bars), but it was included for completeness. In both panels, the diagonal line depicts a one-to-one relationship. In the lower panel, the diagonal dashed line shows the 0.38 mag offset corresponding to the Sloan i’ photometry from APASS. Highly discrepant points in these plots are discussed in the text.