Stellar parameter estimates for confirmed single stars in the star cluster M67. Estimates from the KIC are plotted on the y-axis; along the x-axis are values from the 4 Gyr solar-abundance Yonsei–Yale isochrone (Yi et al. 2008), fit to B, V photometry by Montgomery et al. (1993). The diagonal dashed line indicates equality. Panel (a) shows T _eff on each axis, with lines showing equality and ±200 K overplotted. Panel (b) similarly shows log ( g), with lines showing equality and ±0.3 dex.