\begin{table} %Tb1
 \caption{\label{tab:poly}Tested regions in colour$-$colour space inside which
galaxies with $m_{{\rm bright}}<r'<m_{{\rm faint}}$ are excised from
the lensing catalogue.} 
\small%\centering
\par
 \begin{tabular}{ccccccc}
  \hline\hline\noalign{\smallskip}
 Polygon & Min${(r'-i')}$ & Max${(r'-i')}$ & Min${(g'-r')}$ & Max${(g'-r')}$ & Min${(s)}$ & Max${(s)}$ \\ 
 \hline
 large & 0 & 1.25 & 0.25 & 2.25 & $-$1.0 & 0.583 \\
 small & 0.1 & 1.2 & 0.4 & 2.0 & $-$0.733 & 0.1 \\ \hline 
 \end{tabular}  
\end{table}