Impact from photo-z PDF model bias. The blue case uses photo-z from the BPZ algorithm and true-z for each galaxy to calculate Eq. (A.7) and the resulting Q^Gg and Q^Ig, which are the “sim” cases in Fig. A.1. This A_IA is consistent with 0, which is the MICE2 input. The green case uses the bi-Gaussian photo-z model for the calculation, which are the “model” cases in Fig. A.1, while ignoring the magnification contribution. This lead to unconstrained g_mag and biased A_IA. In the red case, which also uses the photo-z model, but includes the magnification model, the resulting A_IA is still consistent with 0, with the bias from photo-z model error absorbed by g_mag.