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Fig. 1

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Real part of the visibilities as a function of uv-radius for the December (top) and January data (bottom). The visibility tables have been shifted to the position found by the fitting procedure so that their real part represents the point source flux. To increase the signal-to-noise ratio for individual points, the visibilities have been averaged in 30 m bins of uv-radius. The result of the fitting procedure in the uv-plane is presented by the dashed, grey line.

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