\begin{table}%t1
%\centering
\par
\caption{The EDisCS spectroscopic observing runs.}
\label{runinfo}
\begin{tabular}{ccrr}
\hline\hline
Run & Dates & \multicolumn{2}{c}{Number of nights} \\ & (noon-to-noon)
& Total & Usable \\
\hline
% --------------------------------------------------------------------------
Run 1 & 06 Feb. 2002--09 Feb. 2002 &  3 &  1.6 \\
Run 2 & 11 Mar. 2002--19 Mar. 2002 &  8 &  6.9 \\
Run 3 & 26 Mar. 2003--06 Apr. 2003 & 11 & 11.0 \\
Run 4 & 23 Mar. 2004--26 Mar. 2004 &  3 &  3.0 \\
\hline
\end{tabular}
\end{table}