Masses (upper-panel) and eccentricities (lower-panel) for the Kepler-11 planets, calculated with TRADES in grid+LM mode (white-blue circle with blue error bars, see the legend on top of the upper plot) and 2σ confidence intervals from bootstrap analysis (red filled bars), with initial eccentricity of 0.001 for each planet. The blue-yellow circle (dark-green error bars) is the best simulation (number 10, , calculated mass, M_g,out, and input mass, M_g,out, are reported in the legend at the top of the plots). The different simulations (different initial mass of planet g, m_g,in) have been plotted from left (first simulation) to right (eleventh simulation) for each planet. Masses and eccentricities by Lissauer et al. (2013) plotted as black lines (values on top of the plots) with the 2σ confidence intervals (light-gray filled bars). Red lines at 1 M_⊕ (solid) and at 10 M_⊕ (dashed).