Magnification of knots c and c′ for the model shown in Fig. 13. The y-axis shows the magnification along lines perpendicular to the critical curve. The small-scale fluctuations are due to microlenses. The position of the critical curve is shown as a vertical dashed line and the positions of c and c′ by vertical solid lines. The black curve shows the magnification along a horizontal line in Fig. 13 crossing 35 mas south of the millilens. The other two lines are at 20 mas and 50 mas as labeled. The three lines cover the range of estimated distances between c′ and the possible millilens.