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Probing Dark Energy with Supernovae : a concordant or a convergent model?
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abstract
We present a revised interpretation of recent analysis of supernovae data. We evaluate the effect of the priors on the extraction of the dark energy equation of state. We find that the conclusions depend strongly on the $\Omega_M$ prior value and on its uncertainty, and show that a biased fitting procedure applied on non concordant simulated data can converge to the "concordance model". Relaxing the prior on $\Omega_M$ points to other sets of solutions, which are not excluded by observational data.
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