\begin{table}%T7
\par
%\centering
\par
\caption{Estimated values of $z$ for 15 sources with $R>23$.}\label{t7} 
\par
\begin{tabular}{lc}
\hline\hline
Source ID & $z_{\rm est}$\\
\hline
03120031 &  1.3\\
03120036  &  2.0\\
03120045  & 1.7\\
03120065  & 1.0\\
26900029 &   2.3\\
26900075  & 1.9\\
05370022 &  1.0\\
05370054 & 2.1\\
05370060 &  1.4 \\
05370072 &  1.4 \\
05370091 &  0.8 \\
05370111  &1.7\\
05370153 &  1.8 \\
05370157 &  1.6\\
0537052b & 1.3 \\
\hline
\end{tabular}
\end{table}