Energy-binned counts observed by Swift-XRT from the direction of QSO B0218+357 (data points). The emission is modeled as a sum (solid red line) of two power-law components with the same spectral index. The first component (A image) is magnified by a factor 2.7 with an additional strong hydrogen absorption at the lens (dotted blue line). The second component (B image) is intrinsically weaker (magnification factor 0.7), but not absorbed at the lens (dashed green line).