\begin{table}%t4
%\centering
\par
\caption{The best-fit values of the evolution parameter $B, B_z$ (see Eqs.~(\ref{eq:bfit})
and~(\ref{eq:chi2}) and comments in Sect.~4) are obtained by comparing to the 
local best-fit results, indicated in the second column and discussed in the text, 
the~28, 16 and 11~clusters with redshift larger than~$0.4$, $0.6$ and~$0.8$, respectively.
The case of {\it no evolution} corresponds to a value of $B_z$ equal to 0.
The $L-T$ relation has been studied also not including the correction by $E_z$.
This relation is then expected to be proportional to $E_z$ and~$B$ should
be measured in the range 0.6--0.9 in the adopted cosmology. \label{tab:bfit} } 
\begin{tabular}{l@{\hspace{.7em}} c@{\hspace{.7em}} c@{\hspace{.7em}} c@{\hspace{.7em}} 
  c@{\hspace{.7em}} c@{\hspace{.7em}} }
 \hline\hline   
 Relation & Local ref. & & $(z\ge0.4)$ & $(z\ge0.6)$ & $(z\ge0.8)$\\
 \hline  
 & & & \multicolumn{3}{c}{$B$} \\ 
 $L-T$ & Markevitch (1998) & & $0.62 (\pm0.28)$ & $0.04 (\pm0.33)$ & $0.04 (\pm0.39)$ \\
 (Fig.~\ref{fig:lt}) & Arnaud \& Evrard (1999) & & $0.98 (\pm0.20)$ & $0.22 (\pm0.25)$ & $0.24 (\pm0.30)$ \\
 & Novicki et~al. (\cite{Novicki02}) ($z<0.3$) & & $0.54 (\pm0.31)$ & $-0.06 (\pm0.37)$ & $-0.02 (\pm0.43)$ \\
 & Novicki et~al. (\cite{Novicki02}) ($0.3<z<0.6$) & & $0.10 (\pm0.62)$ & $-0.48 (\pm0.73)$ & $-0.34 (\pm0.83)$ \\
%  & &  & \\ 
 & & & \multicolumn{3}{c}{$B_z$} \\ 
%  & &  & \\ 
 $E_z^{-1} L-T$ & Ettori et~al. (\cite{Ettori02}) & & $-1.04 (\pm0.32)$ & $-1.48 (\pm0.38)$ & $-1.46 (\pm0.44)$ \\
 (Fig.~\ref{fig:lt}) & Allen et~al. (\cite{Allen01}c) & & $-0.16 (\pm0.23)$ & $-0.72 (\pm0.28)$ & $-0.78 (\pm0.32)$ \\[2mm]
 $E_z M_{\rm tot}-T$ & Ettori et~al. (\cite{Ettori02}) & & $-0.12 (\pm0.39)$ & $-0.14 (\pm0.46)$ & $-0.06 (\pm0.52)$ \\
 (Fig.~\ref{fig:mt}) & Finoguenov et~al. (\cite{Finoguenov01}) & & $-0.26 (\pm0.17)$ & $-0.16 (\pm0.21)$ & $-0.12 (\pm0.26)$ \\
 & Allen et~al. (\cite{Allen01}c) & & $0.02 (\pm0.39)$ & $0.04 (\pm0.45)$ & $0.06 (\pm0.52)$ \\[2mm]
 $E_z M_{\rm gas}-T$ & Ettori et~al. (\cite{Ettori02}) & & $-0.26 (\pm0.23)$ & $-0.54 (\pm0.27)$ & $-0.54 (\pm0.32)$ \\
 (Fig.~\ref{fig:mgt}) & Mohr et~al. (\cite{Mohr99}) & & $-0.10 (\pm0.20)$ & $-0.42 (\pm0.24)$ & $-0.42 (\pm0.28)$ \\[2mm]
 $E_z^{-1} L-E_z M_{\rm tot}$ & Ettori et~al. (\cite{Ettori02}) & & $-0.60 (\pm0.17)$ & $-1.10 (\pm0.20)$ & $-1.12 (\pm0.25)$ \\
 (Fig.~\ref{fig:lm}) & Reiprich \& B\"ohringer (\cite{Reiprich02}) & & $0.18 (\pm0.20)$ & $-0.86 (\pm0.25)$ & $-0.78 (\pm0.32)$ \\
 \hline 
\end{tabular}
\end{table}