\begin{table}%t2
%%\centering

\par
\caption{\label{tab:simulazioni1a}Average distances of detected peaks from real centres.}
\begin{tabular}{ccc}
\hline \noalign{\smallskip} \hline\noalign{\smallskip}
Redshift Interval & $\Delta r$ (Mpc)  &  $\Delta z$   \\
%\noalign{\smallskip}
\hline\noalign{\smallskip}
$0.4<z<1.2$ &  0.13 $\pm$ 0.09 &  0.016 $\pm$ 0.013 \\
$1.2<z<1.8$& 0.13 $\pm$ 0.07 &  0.028 $\pm$0.019 \\
$1.8<z<2.5$& 0.20 $\pm$ 0.11&  0.044 $\pm$0.033     \\
%\noalign{\smallskip} 
\hline
\end{tabular}
\end{table}