\begin{table}%t3
%\centering
\par
\caption{\label{tb:fj}Parameters of the fits $\log(\sigma)= -\frac{0.4}{\beta}M_r+b$, see Fig.~\ref{fig:fj}.} 
\begin{tabular}{llll}
\hline \hline
          & {\it early non-BCGs} & {\it BCGs}      &    {\it early field}      \\
\hline 
          & C-P04-I           &                  & F-P04-E  \\  
\hline
$\beta$   & $4.0\pm 0.8$      & $4\pm 2$         &  $2.67\pm 0.05$  \\
$b$       & $-0.1\pm 0.3$     & $0\pm 1 $        &   $-1.03\pm 0.06$   \\
\hline \hline
          & C-K07-I           &                  & F-K07-E  \\ 
\hline
$\beta$   & $3.9\pm 0.2$      & $7\pm 3$         & $2.61\pm 0.05$ \\
$b$       & $0.0\pm 0.1$      & $1.0\pm 0.7$     & $-1.11\pm 0.06$    \\
\hline 
\end{tabular}
\end{table}