\begin{table}%t2
\caption{\label{t2}The cooling time and the cooling flow rate determined with the spatial
method of the inner two regions of RXC~J2228.6+2036. The errors are at the 
68\% confidence level. $1'=332.7$ kpc.}
%\begin{center}
\par
\begin{tabular}{cccc}
\hline\hline
 $r_1$ & $r_2$ & $t_{\rm cool}$(yr) & $\dot{M}$($M_{\odot}$~yr$^{-1}$) 
\\
\hline
 $0'$ & $0.5'$ & $1.18\pm0.07\times10^{10}$ & $200.2\pm12.4$ 
\\
 $0.5'$ & $1'$ & $3.58\pm0.27\times10^{10}$ & $414.7\pm32.6$ 
\\
\hline
\end{tabular}
%\end{center}
\par
\label{tablefit}
\end{table}