\begin{table}%ta1
% \vspace*{1mm}
\par
%\centering
\par
\caption{\label{ssel} Variance of $\bar{s}$ and calculated centre (mean position) of cluster, when calculated from subsets
of 200 points randomly selected from 1000 cluster members. }
\begin{tabular}{lccc} 
\hline\hline
Cluster type &$\bar{s}$ &$x$ &$y$ \\
 \hline
\multicolumn{3}{l}{{2D Uniform}}\\
2D0 ($N \propto r^0$)	 & $.87\pm.03$ &$.01\pm0.03$ &$.03 \pm.03 $ \\[1mm]
\multicolumn{3}{l}{{Radially clustered}}\\
3D-2 ($n \propto r^{-2}$) 	& $.59\pm.02$ &$.006\pm.02 $	& $.010 \pm .02$\\
3D-1 ($n \propto r^{-1}$) 	& $.73\pm.02$ &$.009 \pm.03 $ 	&$.007 \pm.02 $ \\
3D0  ($n \propto r^0$) 	 	& $.79\pm.02$ &$.004\pm.03  $ 	& $.012 \pm .03$\\[1mm]
\multicolumn{3}{l}{{Radially anticlustered}}\\
3D05 ($n \propto r^{0.5}$)  	& $.82\pm.03$ &$.03\pm.03  $	& $.006 \pm.03$\\
3D1  ($n \propto r^{1.0}$)  	& $.84\pm.03$ &$.02\pm.03  $	& $.008 \pm.03$\\
3D15 ($n \propto r^{1.5}$) 	& $.85\pm.03$ &$.01\pm.03  $	& $.02 \pm.03$\\[1mm]
\multicolumn{3}{l}{{Fractally clustered}}\\
F3.0 ($D = 3.0$)	& $.79\pm.02$& $.01\pm.02$& $.003\pm.03$\\
F2.5 ($D = 2.5$)	& $.75\pm.03$& $.18\pm.02$& $.15\pm.03$\\
F2.0 ($D = 2.0$)	& $.63\pm.03$& $.08\pm.03$& $.08\pm.03$\\
F1.5 ($D = 1.5$)	& $.67\pm.03$& $.09\pm.08$& $.14\pm.02$\\
\hline
\end{tabular} 
\end{table}