\begin{table}%t3
        \caption{\label{table_visi}Br$\gamma$ visibilities measured in the continuum ($V_{\rm c}$)
        and visibility drop within the Br$\gamma$~line
        ($V_{\rm r}$/$V_{\rm c}$). $V_{\rm r}$ calculated from the measured $V_{\rm c}$ and
        $V_{\rm r}$/$V_{\rm c}$ ratio. The deduced envelope contribution in the
        continuum ($V_{\rm ec}$) and in the line~($V_{\rm er}$) is given for each
        baseline. The corresponding angular diameters in the Br$\gamma$~line ($\phi_{\rm er}$) and the nearby continuum ($\phi_{\rm ec}$) are
        computed using a uniform disk model for each envelope
        measurement. The corresponding extension in stellar radii are
        also given, assuming a 6~$R_\odot$ star at~230~pc.
      }
    \small
    %\centering
\par
     \begin{tabular}{c|ccc} \hline\hline
        Base n$^\circ$ & 1 & 2 & 3 \\
        \hline
        Baseline & UT2-3 & UT3-4 & UT2-4 \\
        Length (m)& 42.7 &  59.3 & 80.8 \\
        PA ($\degr$) & 51.6 & 128 & 97.1 \\
        \hline
        $V_{\rm c}$ &$>$0.93 &$>$0.93&$>$0.93\\
        $V_{\rm r}$/$V_{\rm c}$ &$0.93\pm0.02$ &$0.95\pm0.02$&$0.9\pm0.02$\\
        $V_{\rm r}$ &$0.85< V_{\rm r} <0.95$ &$0.87< V_{\rm r}<0.97$&$0.82<V_{\rm r}<0.92$\\
        \hline
        $V_{\rm ec}$ &$>$0.86 &$>$0.86&$>$0.86\\
        $V_{\rm er}$ &$0.69<V_{\rm er}<0.85$&$0.75<V_{\rm er}<0.91$&$0.60<V_{\rm er}<0.76$\\
        \hline
        $\phi$$_{\rm ec}$ (mas)&$<$3.6 &$<$2.6&$<$1.9\\
        $\phi$$_{\rm er}$ (mas)&$3.7< \phi_{\rm er} <5.5$&$2.0< \phi_{\rm er} <3.6$&$2.6< \phi_{\rm er} <3.4$\\
        \hline
        $\phi$$_{\rm ec}$ (D$_\star$)&$<$15.5&$<$11.2&$<$8.2\\
        $\phi$$_{\rm er}$ (D$_\star$)&$15.9< \phi_{\rm er} <23.7$&$8.6< \phi_{\rm er} <15.4$&$11.2< \phi_{\rm er}<14.6$\\
        \hline
      \end{tabular} 
      \end{table}