\begin{table}%[!ht]%T1
\caption{Basic cluster parameters.}
\label{tab:cluspar}
%\centerline
{
\begin{tabular}{lrrrrr}
\hline\hline
Cluster               & $z$~$^{{a}}$&  scale~$^{{b}}$ & $kT$~$^{{c}}$
     & $F_{\rm X}$~$^{{d}}$ & $N_{\rm H}$~$^{{e}}$\\
\hline
NGC 533               & 0.0175& 30& 1.3&   6& 3.00 \\
Virgo                 & 0.0027&4.7& 2.4& 821& 1.80 \\
A 262                 & 0.0155& 26& 2.4&  49& 8.94 \\
A 1837                & 0.0707&109& 2.4&   7& 4.38 \\              
S\'ersic~159$-$3      & 0.0572& 90& 2.5&  24& 1.79 \\
MKW 9                 & 0.0402& 65& 2.7& 2.3& 4.18 \\
2A 0335+096           & 0.0344& 57& 3.0&  81&28.71 \\
MKW 3s                & 0.0455& 73& 3.0&  30& 2.89 \\
A 2052                & 0.0356& 58& 3.1&  47& 2.91 \\
A 4059                & 0.0466& 75& 3.5&  31& 1.06 \\
Hydra A  (A 780)      & 0.0550& 87& 3.8&  48& 4.80 \\
A 496                 & 0.0322& 53& 3.9&  75& 6.44 \\
A 3112                & 0.0756&116& 4.1&  36& 2.61 \\
A 1795                & 0.0639&100& 5.3&  68& 1.01 \\
A 399                 & 0.0706&109& 5.8&  29&10.90 \\
A 3266                & 0.0614& 96& 6.2&  49& 1.60 \\
Perseus (A 426)       & 0.0179& 30& 6.3& 926&14.90 \\
Coma (A 1656)         & 0.0240& 40& 8.1& 319& 0.89 \\
A 754                 & 0.0561& 89& 9.1&  64& 5.67 \\
A 1835                & 0.2541&298&14.8&  15& 2.32 \\
\hline
\end{tabular}}
\par
\medskip
$^{{a}}$ Redshift, to be used for the distance estimate.\\
$^{{b}}$ Angular scale, in kpc/arcmin.\\
$^{{c}}$ Temperature, in keV.\\
$^{{d}}$ Unabsorbed 0.1--2.4~keV X-ray flux, in $10^{-15}$~W~m$^{-2}$.\\
$^{{e}}$ Galactic column density, in $10^{24}$~m$^{-2}$.
\end{table}