\begin{table}%t1
%\centering
\par
\caption{\label{tab1}Mean features  of the generated haloes at $z=0$ in test $1$. 
}
\small%\centering
\par
\begin{tabular}{ccccccccccc}
\hline \hline\noalign{\smallskip}
Halo & $x$ & $y$  & $z$ & $M_{\rm vir}$ & $r_{\rm vir}$ & {\it C}  & $\alpha$
& $\beta$ & $N_{\rm DM}$ & $\rm level$ \\   
&   (Mpc)   &   (Mpc) &   (Mpc)   & $(10^{14}~M_\odot)$ & (Mpc) & & & &  \\ 
\hline 
H1 & 0.0 & 0.0 & 0.0 & 20.8 & 2.07 & 6.12 (6.25) & 0.98 & 2.06 & 400~000 & 0 \\ 
H2 & --10.0 & --10.0 & --10.0 & 5.19 & 1.30 & 6.92 (7.01) & 0.97 & 2.04 & 100~000 & 0 \\ 
H3 & 25.0 & 25.0 & 25.0 & 1.29 & 0.82 & 7.88 (7.87) & 1.006 & 1.99 & 25000 & 1 \\ 
H4 & 10.0 & 10.0 & 10.0 & 0.78 & 0.69 & 8.36 (8.22) & 0.992 & 1.97 & 15000 & 2 \\ 
\hline
\end{tabular}
\tablefoot{Column 1 contains the halo name;
Cols.~2--4 stand for the $x$, $y$, and $z$ coordinates respectively
of the centre of mass of each halo in units  of  Mpc;
Col. 5 shows the total  mass within the virial radius  in units of 
$10^{14}~M_\odot$;
Col.~6  the virial radius in units  of Mpc;
Col.~7 the concentration given by the fitting and between 
parenthesis the concentration of the input density profile;
Col.~8 the density profile inner slope ($\alpha$) given by the fitting;
Col.~9 the density profile outer slope ($\beta$) of the fitting;
Col.~10 the number of dark matter particles within each halo;
Col.~11 the AMR level on which the halo is located.}
\end{table}