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Fig. 5.

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Best-fitting Gaussian amplitudes for the stacked radial intensity profiles. Panel a: profile stacking and panel b: image stacking. Solid blue lines show the purely observational data, whereas solid red lines show the same data with an additional fake source. Shaded areas indicate 1σ uncertainties. The FWHM of the Gaussian is expressed as the apparent size of the stellar radius, θ = r/d.

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