Fig. 2

Posterior probability distribution for Lx for Kepler-11 at an age of 120 Myr (solid blue line; 68% confidence interval in green) in comparison to the Lx distribution obtained for stars of similar spectral type in NGC 2516 (black dotted line; 48 stars) and for all detected stars in the same cluster (red dotted line; 239 stars; Pillitteri et al. 2006).
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