Corner plots showing the posteriors of all parameters from the NS analysis for the three-planet model. The top panel of every column shows the histogram distribution of each parameter. The bottom left cornerplot, from top to bottom and left to right the parameters are: RV offsets of HARPS, FEROS, and HIRES, RV jitters of HARPS, FEROS, and HIRES, K _d, P _d, e _d, K _b, P _b, e _b, K _c, P _c, and e _c. The top right cornerplot shows the posterior distribution of the derived parameters: the semimajor axes a _d, a _b, and a _c, the minimum masses ﹩{m}_{{\rm{d}}}\sin i﹩, ﹩{m}_{{\rm{b}}}\sin i﹩, and ﹩{m}_{{\rm{c}}}\sin i﹩, and the mean longitudes, which are λ _b,c,d = ω _b,c,d + M _db,c,d. The two-dimensional contours indicate the 1, 2, and 3σ confidence levels of the posterior distribution. The red lines mark the position of the median values.