Extended Data Figure 9: Probability distributions for the activity coefficients versus the signal amplitude.
From: A terrestrial planet candidate in a temperate orbit around Proxima Centauri
a–n, Marginalized posterior densities of the activity coefficients versus the semi-amplitude of the signal for UVES (a), HARPS pre-2016 (b–f), HARPS PRD campaign (g–k) and the photometric FF′ indices for the PRD campaign only (l–n). Each panel shows equiprobability contours containing 50%, 95% and 99% of the probability density around the mean estimate, and the corresponding standard deviation of the marginalized distribution (1σ) in red. The blue bar shows the zero value of each activity coefficient. Only CF′ is found to be substantially different from zero.
