Grey and violet confidence regions are obtained from the supernova alone and the joint analysis, respectively. Top panel: 1, 2, and 3σ confidence regions in the Ω_m−Ω_Λ parameter space for kΛCDM. The solid line identifies the flat ΛCDM models. The dashed line gives the no-acceleration criterion: Ω_m = Ω_Λ/ 2. The black point is where the 4.98σ confidence contour of the joint likelihood touches the dashed line. Bottom panel: 1, 2, and 3σ confidence regions in the Ω_m−w parameter space for flat wCDM. As in the top panel, the dashed curve identifies the no-acceleration criterion: w = −1/(3(1−Ω_m)). Likewise, the black point is where the 5.38σ confidence contour of the joint likelihood touches the dashed line.