Relation between the residuals in both types of principal components and the induced biases are shown for 832086 (w2m0m1). The first two rows show the relations between antisymmetric PCs and additive biases. The third row shows the relations between symmetric PCs and additive biases. The last row shows the relation between antisymmetric PCs and multiplicative biases. The residuals r_p are divided by their corresponding standard deviations σ_p. In each of these panels, a 5σ range of the residual is shown. Galaxies are generated by 20 point sources following two-dimensional normal distribution with σ = 2.1 pixel.