Fig. 3
Absolute value of the series coefficients an for the elliptical power law profile lens. Shown are different values t = 0.5 (dotted), t = 1.0 (solid), and t = 1.5 (dashed) for the slope of the power law and axis ratios from q = 0.8 (bottom) to q = 0.2 (top) in steps of 0.2.
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