Posteriors of the K_b parameter retrieved from the simulations involving mock RV datasets build on the best-fit stellar activity signals based on a quasi-periodic and SHO mixture models (see the text for details). The simulated RV time series include an injected planetary signal of semi-amplitude K_{b, inj} = 40 m s⁻¹. Only five out of a total of ten posteriors are shown for the sake of a better the readability First row: results from the fit of data generated using a quasi-periodic kernel. Second row: results from the fit of data generated using a SHO mixture kernel. In both rows, each colour identifies one mock dataset, therefore, the posterior distributions with the same colour can be compared. The vertical lines indicate the median of the posteriors.