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Fig. 3.
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Colour map showing the isocontours of the reduced χ2 fit for the γ-ray light curve for the angles α and ζ. The 1σ, 2σ, and 3σ confidence intervals are also shown. The minimum is located at (α, ζ) = (138° ,136° ) (corresponding to the mirror angle α = 42°) and depicted by a red circle.
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