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Fig. 3


Line-core magnitude differences for SDSS J1339+1310. Filled circles with error bars describe our measurements in the fifth column of Table B.1. Instead of λ values, the x-axis displays the wavelength-dependent quantity x ∝ 1 /λ (see main text). Assuming microlensing-free fluxes of line cores and Galactic extinction in the lensing galaxy, we also show the best fits using Mg ii + C iii] + C iv data (dotted red line), Mg ii + C iii] + C iv + Si iv/O iv] data (dashed red line) and the five measurements (solid red line). For a standard linear extinction in the lensing galaxy, the solid green line traces the best fit to the five magnitude differences.

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