Fig. 4


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Excess brightness profiles I(L = L' − ΔL) taken from Cut A (upper panel) and Cut B (lower) shown in Figure 3. The dotted line in each panel indicates the zero brightness. The red line in each panel is the modeled excess brightness profile I ′ (L) obtained from χ2 fits shown in Figure 5. The blue lines indicate the slope of the observed brightness profiles. The two dashed lines in each panel demarcate the region where the χ2 values are calculated.

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