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Fig. 1.

image

Simplified transit shape used in this paper. The flux drops linearly in the ingress and egress parts at a rate given by the T14/T12 ratio and δ. The U-shaped bottom is supposed to model the overall limb darkening. It has an analytical form of , where x = 2ϕ/(ϕ3 − ϕ2), with totality start/end phases ϕ2, ϕ3 and phase ϕ, where the function is to be evaluated.

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