Experimental constraints on and parameters of the uncoupled Galileon model from SNLS3 data (dashed purple contours) and JLA data (filled blue contours). α and β were fixed to their ΛCDM best-fit values, and we marginalised over the remaining fitted parameters. The filled dark, medium, and light-blue contours enclose 68.3, 95.4, and 99.7% of the probability, respectively. The contours include statistical and all identified systematic uncertainties. The dark dotted regions correspond to scenarios rejected by theoretical constraints.