Extended Data Figure 2: Signal searches on independent radial velocity data sets.
From: A terrestrial planet candidate in a temperate orbit around Proxima Centauri
a–c, Likelihood-ratio periodograms searches on the radial velocity (RV) measurements of the UVES (a), HARPS pre-2016 (b) and HARPS PRD (c) subsets. The periodogram with all three sets combined is shown in Fig. 1. The black and red lines represent the searches for the first and second signals, respectively. The green vertical lines mark the period of the planet candidate at 11.2 d.
