Marginal posteriors for Ωm (left panel) and the dark energy equation of state, w0 (middle panel), for ∼3000 MCMC realisations, ignoring the burn-in phase of ∼250 Markov steps. The corresponding mean and standard deviation for each parameter are indicated in the top right corner of each plot. The joint posterior (right panel) for Ωm and w0, depicting the high level of correlation between these two parameters. The highly informative distortion due to the cosmic expansion, as a result of probing a deep redshift range, yields extremely tight constraints on the above cosmological parameters. As a consistency test, this validates our implementation of the AP test to correctly recover the input cosmology.
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