\begin{table}%t1
%\centering
\par
\caption {\label{tab:obs_prop}Characteristics of the released data in the $r'$- and
 $z'$-bands of the T0003 Terapix release.}
\begin{tabular}{lrr}
\hline\hline
Passband &\multicolumn{1}{c}{$r'$} & \multicolumn{1}{c}{$z'$}\\
\hline
Exposure time [h] & 8.8--20.2 & 10.1--20.1\\
Seeing [arcsec] & 0.88--0.94 & 0.83--0.88\\
Magn. at 80\% completeness & 24.3--25.8 & 24.4--24.7\\
\hline
\end{tabular}

\end{table}