Distribution of the median likelihood R_s and a_s for all the runs for the different noise levels, with the runs injecting planet and moon in the top panel and runs injecting only a planet in the bottom panel. The Δ BIC of the planet–moon model compared to the no-moon model for all runs is indicated by the color. Generally, runs with a low Δ BIC (indicating the presence of a moon) also are in the vicinity of the injected parameter.