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We present a catalog of revised effective temperatures for stars observed inlong-cadence mode in the Kepler Input Catalog (KIC). We use SDSS griz filterstied to the fundamental temperature scale. Polynomials for grizcolor-temperature relations are presented, along with correction terms forsurface gravity effects, metallicity, and statistical corrections for binarycompanions or blending. We compare our temperature scale to the publishedinfrared flux method (IRFM) scale for VJKs in both open clusters and the Keplerfields. We find good agreement overall, with some deviations between (J -Ks)-based temperatures from the IRFM and both SDSS filter and other diagnosticIRFM color-temperature relationships above 6000 K. For field dwarfs we find amean shift towards hotter temperatures relative to the KIC, of order 215 K, inthe regime where the IRFM scale is well-defined (4000 K to 6500 K). This changeis of comparable magnitude in both color systems and in spectroscopy for starswith Teff below 6000 K. Systematic differences between temperature estimatorsappear for hotter stars, and we define corrections to put the SDSS temperatureson the IRFM scale for them. When the theoretical dependence on gravity isaccounted for we find a similar temperature scale offset between thefundamental and KIC scales for giants. We demonstrate that statisticalcorrections to color-based temperatures from binaries are significant. Typicalerrors, mostly from uncertainties in extinction, are of order 100 K.Implications for other applications of the KIC are discussed.

A Revised Effective Temperature Scale for the Kepler Input Catalog