Left panel: distance modulus as a function of redshift. The dots are coloured according to the original SN survey, as described in Betoule et al. (2014), and indicate the distance modulus μ_data computed from each SN in the sample. Blue: several low-z. Green: SDSS-II. Yellow: SNLS. Red: HST. The black line indicates the distance modulus computed theoretically for the values { H₀,q₀,j₀ } estimated using the complete sample. The black dashed and black dotted lines indicate the distance modulus for two extreme cases. Right panel: Markov chain of one realization. The dots indicate the entries in the Markov chain. The position in the graph indicates the values of (q₀,j₀) of each entry according to the axes, whereas the colour indicates the value of H₀ as detailed in the side colour bar. The dashed line represents j₀ = q₀(1 + 2q₀), which separates between flat and curved space–time.