Figure 20

Figure 20: Errors on the equation of state. 1 and 2σ marginalized probability regions for the parameters w0 and w1, relative to the reference case and bias ∘ - b = (1 + z). The blue dashed ellipses are obtained fixing γ0,γ1 and Ωk = 0 to their fiducial values and marginalizing over all the other parameters; for the red shaded ellipses instead, we also marginalize over Ωk = 0 but we fix γ0,γ1. Finally, the black dotted ellipses are obtained marginalizing over all parameters but w0 and w1. The progressive increase in the number of parameters reflects in a widening of the ellipses with a consequent decrease in the figures of merit (see Table 11).