Left panel: calibrated squared visibilities of γ Psc. The colour denotes the baseline: K0-G1, A0-G1, and A0-K0 are shown in blue, green, and red, respectively. The dashed and dotted lines are the best-fit UD angular diameters in the H and K bands. Different symbols are used to represent the two calibrated exposures in the H (circles and diamonds) and K (squares and crosses) band. Right panel: closure phases as a function of the longest spatial frequency in the triplet. The same symbols are used as in the left panel, but the colour now denotes the exposure (blue being the first).