\begin{table}%t1
%\centering
\par
     \caption{Physical cluster parameters.  $\Mv$, $M_{\rm g, 500}$
       and  $f_{\rm g,500}$ are the total mass, gas mass and gas mass
       fraction respectively, within the radius $\Rv$, inside which
       the mean mass density is 500 times the critical
       density at the cluster redshift. $\TX$ is the spectroscopic temperature within [0.15--0.75]$R_{500}$ and   $Y_{\rm X}= M_{\rm g, 500} \TX$. Values  are given for a
       $\Lambda$CDM cosmology  with $\Omega_{\rm m}=0.3$, $\Omega_{\Lambda}=0.7$, $H_0=70$~km s$^{-1}$ Mpc$^{-1}$. Errors are $1~\sigma$.}  \label{tab:clu}
    \begin{tabular}{lcccccc}
    \hline    \hline\noalign{\smallskip}
 Cluster & $z$ & $\TX (\keV)$&  $M_{500}~(10^{14}~\msol)$& $M_{\rm g,500}~(10^{13}~ \msol)$&$Y_{\rm X}~(10^{13}~ \msol~\keV)$& $f_{\rm g,500}$ \\
    \hline\noalign{\smallskip}
\object{A 1983}& $0.0442$ & $2.18\pm0.09$ & $1.09_{\rm -0.29}^{+0.45}$ & $ 0.64_{\rm - 0.08}^{+ 0.10}$ & $ 1.39_{\rm -0.18}^{+0.23}$ & $0.058_{\rm -0.017}^{+0.026}$\\[1mm]
\object{MKW9}& $0.0382$ & $2.43\pm0.24$ & $0.88_{\rm -0.18}^{+0.23}$ & $ 0.49_{\rm - 0.05}^{+ 0.06}$ & $ 1.19_{\rm -0.17}^{+0.18}$ & $0.055_{\rm -0.012}^{+0.016}$\\[1mm]
 \object{A 2717}& $0.0498$ & $2.56\pm0.06$ & $1.10_{\rm -0.11}^{+0.13}$ & $ 1.02_{\rm - 0.05}^{+ 0.06}$ & $ 2.60_{\rm -0.15}^{+0.16}$ & $0.093_{\rm -0.011}^{+0.012}$\\[1mm]
\object{A 1991}& $0.0586$ & $2.71\pm0.07$ & $1.20_{\rm -0.12}^{+0.13}$ & $ 1.25_{\rm - 0.06}^{+ 0.06}$ & $ 3.39_{\rm -0.19}^{+0.19}$ & $0.104_{\rm -0.011}^{+0.012}$\\[1mm]
 \object{A 2597}& $0.0852$ & $3.67\pm0.09$ & $2.22_{\rm -0.21}^{+0.23}$ & $ 2.51_{\rm - 0.08}^{+ 0.09}$ & $ 9.21_{\rm -0.38}^{+0.39}$ & $0.113_{\rm -0.011}^{+0.012}$\\[1mm]
 \object{A 1068}& $0.1375$ & $4.67\pm0.11$ & $3.87_{\rm -0.27}^{+0.29}$ & $ 3.77_{\rm - 0.10}^{+ 0.10}$ & $17.6_{\rm -0.62}^{+0.63}$ & $0.097_{\rm -0.007}^{+0.008}$\\[1mm]
\object{A 1413}& $0.1430$ & $6.62\pm0.14$ & $4.82_{\rm -0.40}^{+0.44}$ & $ 7.55_{\rm - 0.27}^{+ 0.28}$ & $50.0_{\rm -2.1}^{+2.1}$ & $0.157_{\rm -0.014}^{+0.016}$\\[1mm]
\object{A 478}& $0.0881$ & $7.05\pm0.12$ & $7.57_{\rm -1.02}^{+1.20}$ & $ 9.33_{\rm - 0.43}^{+ 0.46}$ & $65.8_{\rm -3.2}^{+3.4}$ & $0.123_{\rm -0.017}^{+0.020}$\\[1mm]
\object{PKS 0745-191}& $0.1028$ & $7.97\pm0.28$ & $7.27_{\rm -0.70}^{+0.80}$ & $10.71_{\rm - 0.47}^{+ 0.50}$ & $85.3_{\rm -4.8}^{+5.0}$ & $0.147_{\rm -0.016}^{+0.018}$\\[1mm]
\object{A 2204}& $0.1523$ & $8.26\pm0.22$ & $8.39_{\rm -0.77}^{+0.86}$ & $10.55_{\rm - 0.39}^{+ 0.40}$ & $87.2_{\rm -4.0}^{+4.1}$ & $0.126_{\rm -0.012}^{+0.014}$\\[1mm]
    \hline
 \end{tabular}
\end{table}