Convergence of the parameters of the fourth Keplerian as a function of Markov chain length to a period of 630 days (top) and a RV amplitude of 0.56 m s-1 (bottom) for three different Markov chains (denoted using different colours). Arrows indicate the randomly selected initial values (K is chosen to be initially close to zero). The chains have been thinned by a factor of ten.
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