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Fig. 5

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Center-to-limb fits (red dashed line) obtained using Eq. (1) with N = 2 for the 3D azimuthally average intensity profile (solid line). A full limb-darkening (dash-dotted line), a partial limb-darkening (triple dot-dashed line) are also shown. μ = cosθ, with θ the angle between the line of sight and the vertical direction.

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