\begin{table}%t3
\caption{\label{tab_logopt}Description of the optical observations.}
%\begin{center}
\par
\begin{tabular}{l c c l l l l l} 
\hline \hline
Target & Night & Telescope & Exposures & Exp. Time & Total Exp. Time & ${\it FWHM}$ & Airmass\\
 & & & & (s) & (s) & (arcsec) & \\
\hline
\candzsf  & 22-02-2007 & ESO-VLT  & 2~$\times$~$B$, 2~$\times$~$R$                  & 150, 150      & 300, 300        & 0.81, 0.68       & 1.27, 1.26\\
\candosf  & 25-02-2007 & ESO-VLT  & 2~$\times$~$B$, 2~$\times$~$R$                  & 150, 150      & 300, 300        & 0.83, 0.70       & 1.16, 1.15\\
\candseo  & 09-05-2007 & SOAR & 14~$\times$~$U$, 7~$\times$~$B$, 3~$\times$~$R$ & 500, 200, 200 & 7000, 1400, 600 & 0.90, 0.74, 0.80 & 1.10, 1.03, 1.01\\
\candszf  & 10-07-2007 & SOAR & 4~$\times$~$U$, 4~$\times$~$B$, 4~$\times$~$R$  & 500, 200, 200 & 2000, 800, 800  & 0.75, 0.68, 0.62 & 1.02, 1.01, 1.01\\
\candtsf  & 11-07-2007 & SOAR & 4~$\times$~$U$, 4~$\times$~$B$, 3~$\times$~$R$  & 500, 200, 200 & 2000, 800, 600  & 1.11, 0.95, 0.80 & 1.19, 1.23, 1.25\\
\candtoe  & 21-07-2007 & ESO-VLT  & 2~$\times$~$B$, 2~$\times$~$R$                  & 150, 150      & 300, 300        & 0.62, 0.58       & 1.16, 1.15\\
\candtfie & 29-01-2008 & SOAR & 4~$\times$~$U$, 5~$\times$~$B$, 4~$\times$~$R$  & 500, 200, 200 & 2000, 1000, 800 & 0.85, 0.82, 0.72 & 1.18, 1.22, 1.24\\
\candtfoe & 30-01-2008 & SOAR & 4~$\times$~$U$, 4~$\times$~$B$, 4~$\times$~$R$  & 500, 200, 200 & 2000, 800, 800  & 1.14, 1.16, 1.10 & 1.10, 1.11, 1.12\\
\candzsf  & 08-02-2008 & SOAR & 6~$\times$~$V$                                  & 1120 & 6720 & 0.94 & 1.23\\
\hline
\end{tabular}
%\end{center}
\par
\end{table}