COSEBIs measurements and their expected values for KV450. The E-modes are shown in the upper triangle and the B-modes in the lower triangle. Each panel corresponds to a redshift bin pair as indicated in its corner. Theoretically expected values are shown for the best fitting parameters for KV450 (red dashed) and its combination with DES-Y1 (solid purple). The COSEBI modes are discrete and the points are connected to each other purely for visual purposes. The error on the B-modes is calculated assuming that the only contribution is shape noise, while for the E-modes we take all Gaussian terms as well as the super sample covariance into account (see Appendix A). Neighbouring COSEBI modes are correlated and the goodness-of-fit of the model cannot be established by eye (see Table 2).