\begin{table}%T1
%\centering
\par
\caption{Calibration sequence of $\alpha$~Cen~B on the B3-M0
baseline (140~m ground length). The expected visibilities $V^2_{\rm
theo}$ given in this table include the bandwidth smearing effect.
The interferometric efficiency given in italics corresponds to the
value assumed for the calibration of these particular
$\alpha$~Cen~B observations (see Tables~\ref{table_alfcenB_1} and
\ref{table_alfcenB_2}). The HR~4831 data marked with ($^{*}$) were
taken 2~h before $\alpha$~Cen~B, and are listed to show the
stability of the IE, but were not used for the IE estimation.}
\label{Cal_alfcen}
\begin{tabular}{ccccccll}
\hline\hline
JD & Scans & $B$~(m) & Azim. & $\mu^{2} \pm$ stat. (\%) & $V^2_{\rm theo} \pm$ syst. (\%) & {\it IE} $\pm$ stat. $\pm$ syst. (\%) & Target\\
\hline
2~452~770.5474 & 365 & 139.309 & 49.24 & $29.37 \pm 0.39$ & $49.93 \pm 0.80$ & $58.83 \pm 0.79 \pm 0.94^{*}$ & HR~4831$^{*}$\\
2~452~770.5523 & 316 & 139.131 & 50.51 & $29.38 \pm 0.51$ & $50.06 \pm 0.80$ & $58.70 \pm 1.02 \pm 0.93^{*}$ & HR~4831$^{*}$\\
2~452~770.5572 & 296 & 138.913 & 51.77 & $30.05 \pm 0.67$ & $50.19 \pm 0.80$ & $59.88 \pm 1.34 \pm 0.95^{*}$ & HR~4831$^{*}$\\
\hline
2~452~770.6368 & 405 & 128.934 & 71.28 & $32.05 \pm 0.35$ & $55.48 \pm 0.75$ & $57.78 \pm 0.62 \pm 0.77$ & HR~4831\\
2~452~770.6419 & 408 & 127.841 & 72.49 & $31.60 \pm 0.36$ & $56.01 \pm 0.74$ & $56.42 \pm 0.64 \pm 0.74$ & HR~4831\\
2~452~770.6469 & 392 & 126.698 & 73.69 & $32.72 \pm 0.36$ & $56.54 \pm 0.73$ & $57.87 \pm 0.64 \pm 0.74$ & HR~4831\\
\hline
2~452~770.6605 & 299 & 133.838 & 59.85 & $0.791 \pm 0.039$ & & $\it 57.36 \pm 0.82 \pm 0.74$ & $\alpha$~Cen~B \\
2~452~770.6656 & 235 & 133.277 & 61.33 & $0.777 \pm 0.082$ & & $\it 57.36 \pm 0.82 \pm 0.74$ & $\alpha$~Cen~B \\
\hline
\end{tabular}
\end{table}