\begin{table}%t6
%\centering
\par
\caption{\label{tab:clusters}CJF sources observed and detected in the optical regime as group or cluster members. }
\begin{tabular}{l l l c l l l c}
\hline\hline\noalign{\smallskip}
{Source}	        &	{Type}    & ${z}$ &{Reference}   &{Source}     &{  Type}	    &  ${z}$	   &	 {Reference}   \\
\hline
0010+405        &	G		&0.255	   &      62    &1038+528	&	Q		&0.677	   &	81          \\
0014+813	    &	Q		&3.366	   &	  63   &1101+384   &	BL 		&0.031	   &    82          \\
0153+744        &	Q		&2.388	   &      64    &1144+352	&	G		&0.063	   &    83          \\
0212+735        &	Q		&2.367	   &      64    &1146+596   &	G		&0.011	   &    84   	    \\
0219+428        &	BL 		&0.444	   &      65    &1150+812   &	Q		&1.250	   &    64          \\
0309+411        &	Q		&0.134	   &      66    &1213+350	&	Q	  	&0.857	   &    62          \\
0316+413	    &	G		&0.018	   &      67    &1216+487	&   Q	  	&1.076	   &    64          \\
0636+680        &	Q		&3.174	   &      68    &1254+571	&	G		&0.422     &    85          \\
0651+410	    &	G		&0.022	   &      69    &1415+463	&   Q	  	&1.552	   &    76          \\
0700+470	    &	G		&	       &      70    &1435+638	&   Q	  	&2.068	   &    65          \\
0710+439        &	G		&0.518	   &      62    &1624+416	&   Q	  	&2.550	   &    77          \\
0727+409        &	Q		&2.500	   &      71    &1633+382	&   Q	  	&1.807	   &    76          \\
0733+597        &	G		&0.041	   &      72    &1636+473	&   Q	  	&0.740	   &    76          \\
0821+394        &	Q		&1.216	   &      73    &1637+574	&   Q	  	&0.749	   &    86          \\
0831+557        &	G		&0.240	   &      74    &1638+540	&	Q       &1.977     &    87          \\
0836+710        &	Q		&2.180	   &      62    &1638+398	&   Q	  	&1.660	   &    79          \\
0847+379	    &	G		&0.407	   &      75    &1642+690	&   Q	  	&0.751	   &    64          \\
0850+581        &	Q		&1.322	   &      73    &1641+399	&   Q	  	&0.595	   &    88          \\
0859+470        &	Q		&1.462	   &      76    &1652+398	&   BL 	  	&0.034     &    89          \\
0923+392        &	Q		&0.699	   &      62    &1716+686	&   Q	  	&0.339	   &    64          \\
0945+408        &	Q		&1.252	   &      65    &1744+557	&	G		&0.031	   &    69          \\
0954+556        &	Q		&0.909	   &      77    &1751+441	&   Q	  	&0.871	   &    64          \\
0955+476        &	Q		&1.873	   &      78    &1803+784	&   BL 	  	&0.680	   &    65          \\
1010+350        &	Q		&1.414	   &      79    &1807+698	&   BL 	  	&0.051	   &    82          \\
1020+400        &	Q		&1.254	   &      76    &2214+350	&   Q	  	&0.510	   &    90          \\
1031+567        &	G		&0.460	   &      80    &          	&   	  	&	       &                \\
\hline
\end{tabular}
\tablefoot{Columns~(1)--(3) as in Table~\ref{tab:infrared}, Col.~(4) gives the reference for clustering (Table~\ref{tab:opticalref}).}
\end{table}