\begin{table}%t1
\caption{Summary of data used.}\label{tab:data}
%\centering
\small
\begin{tabular}{lccc}
\hline
\hline
Date & Exposures & Total $t_{\rm exp}$ & Seeing \\
~ & ~ & (s) & (\arcsec) \\
\hline
April 17 2005 & 4 & 4000 & 0.99 $\pm$ 0.06 \\
April 30 2005 & 9 & 9000 & 0.83 $\pm$ 0.10 \\
May 9 2005 & 8 & 8000 & 0.78 $\pm$ 0.03 \\
May 11 2005 & 9 & 9000 & 0.84 $\pm$ 0.13 \\
May 12 2005 & 9 & 9000 & 0.92 $\pm$ 0.07 \\
May 29 2005 & 9 & 9000 & 1.00 $\pm$ 0.14 \\
May 30 2005 & 9 & 9000 & 0.82 $\pm$ 0.10 \\
May 31 2005 & 9 & 9000 & 0.80 $\pm$ 0.13 \\
June 1 2005 & 9 & 9000 & 1.02 $\pm$ 0.15 \\
June 8 2005 & 9 & 9000 & 0.79 $\pm$ 0.07 \\
\hline
\end{tabular}
\end{table}