\begin{table}%t2
\par
\caption{\label{log}Observation log for the night of July 28th 2008. }
\small
%\centerline
{
\begin{tabular}{cccccccc}
\hline\hline\noalign{\smallskip}
UT & HD & $r_0$ & Star & $\theta_{\rm UD}$ & $V^2_{\rm instr}(R)$ & $V^2_{\rm instr}(B)$\\
\noalign{\smallskip}\hline
6:47 & 166014 & 12 & Cal & 0.53 & 0.43~$\pm$~0.01 & 0.42~$\pm$~0.01\\
7:18 & 172167 & 11 & Vega & &\\
7:33 & 197345 & 12 & Deneb & &\\
7:49 & 172167 & 10 & Vega & &\\
8:07 & 176437 & 11 & Cal & 0.71 & 0.53~$\pm$~0.02 & 0.39~$\pm$~0.01\\
8:18 & 166014 & 11 & Cal & 0.53 & 0.57~$\pm$~0.03 & 0.39~$\pm$~0.01\\
8:32 & 176437 & 10 & Cal & 0.71 & 0.53~$\pm$~0.01 & 0.41~$\pm$~0.01\\
\hline
\end{tabular} }
\smallskip
 Column 1 gives the UT time of the start of the observation, Col.~2 the HD number, Col.~3 the $r_0$ estimation (in cm) given by the CHARA tip/tilt sensor. If the star is considered as a calibrator (Col.~4), Col.~5 gives the adopted uniform-disk diameter at 600~nm in millisecond of~arc. 
\end{table}