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Fig. 7

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Estimate of the closure phase of calibrator stars HD 46487 and HD 55185 with VEGA with three telescopes (E1E2W2) at medium spectral resolution (Δλ = 30   nm centered at λ = 735   nm) and fringe tracking done with CLIMB. Each estimate corresponds to 5 s of observation (250 short exposures of 20 ms).

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