Top panel: periodogram of the GJ 3293 RVs. The solid line, dashed line, and dashed dotted line represent the 0.3%, 4.6%, and 31.7% FAP levels, corresponding to 3σ, 2σ, and 1σ confidence, respectively. Bottom panel: periodograms for epochs 2008−2009 (34 measurements, first row), 2010−2011 (52 measurements, second row), and 2012−2013 (59 measurements, third row); the stability of the 30 d signal (dash-dotted vertical) is clear.