(Left) Fractional uncertainty on ﹩{F}_{\mathrm{bol}}﹩ from the SED fitting procedure as a function of ﹩{\chi }_{\nu }^{2}﹩ and of ﹩{T}_{\mathrm{eff}}﹩ uncertainty. The vertical line represents the cutoff of ﹩{\chi }_{\nu }^{2}\leqslant 5﹩ for which the uncertainty on ﹩{F}_{\mathrm{bol}}﹩ is at most 6% for most stars, thus permitting a determination of ﹩{R}_{\star }﹩ to ≈3%. Points with blue halos represent stars with transiting planets. (Right) Distribution of fractional ﹩{F}_{\mathrm{bol}}﹩ uncertainties for stars with ﹩{\chi }_{\nu }^{2}\leqslant 5﹩. The median uncertainty on ﹩{F}_{\mathrm{bol}}﹩ for transiting-planet host stars (blue) is 2%; it is 1.7% for all stars.