\begin{table}%t1
%\centering
\par
\caption{Typical OBs used in the observations for the DPS optical survey. The table gives: in Col.~1 the passband; in
Col.~2 the filter id adopting the unique naming convention of the La
Silla Science Operations Team; in Col.~3 the number of exposures in
the OB; in Col.~4 the integration time of the individual sub-exposures
in the OB; and in Col.~5 the total exposure time in seconds.} 
\label{tab:ob}\small
\begin{tabular}{lcccc}
\hline\hline
Passband &    Filter & \# exposures & $T_{\exp}$ & $T_{\rm tot}$ \\
         &   &            & (s)  & (s) \\                        
\hline
$U$        &  \#877  &  5  &  900  & 4500 \\
$U$        &  \#841  &  5  &  550  & 2750 \\
$B$        &  \#842  &  5  &  300  & 1500 \\
$V$        &  \#843  &  5  &  300  & 1500 \\
$R$        &  \#844  &  5  &  300  & 1500 \\
$I$        &  \#879  &  5  &  600  & 3000 \\
$I$        &  \#845  & 10  &  300  & 3000 \\
\hline
\end{tabular}
\end{table}