Comparison of eccentricity measurements for 13 Kepler targets. Top panel: eccentricity measurements from this work versus those obtained in Kjurkchieva & Vasileva (2015, 2018), along the diagonal (grey line). The linear regression model is plotted as a black dotted line. Bottom panel: comparison between the tangential and radial components of eccentricity. The dashed line indicates where points occur if the definition of primary and secondary eclipse is swapped.