\begin{table}%t5
%\centering
\caption{\label{repeatedresults}Measured displacement $\Delta$ (mas) of the central source in repeated fields and its statistical significance.}
\small 
\begin{tabular}{lcccc}
\hline\hline
Field              &  $\Delta$ & $\sigma$   &  $\Delta$   & $\sigma$  \\  
                   &\multicolumn{2}{c}{randomized} & \multicolumn{2}{c}{no randomization} \\ 
\hline		   
LALA Cetus Field   &  173        & 0.92        &   96        &  0.59 \\
PKS 0312-7707      &  100        & 0.88        &  112        &  1.02 \\
FIELD-142549+353248&   54        & 0.38        &   84        &  0.58 \\
3C 33              &   62        & 0.50        &   91        &  0.70 \\
3C 325             &   66        & 0.57        &   43        &  0.40 \\
MG J0414+0534      &  112        & 1.03        &   48        &  0.49 \\  
\hline
\end{tabular}
\end{table}