\begin{table}%t1
%\centering
\par
\caption{Parameter values obtained by \citet{Liang}.\label{table:no1}} 
\begin{tabular}{c c c} 
\hline\hline 
Relation & $a$ & $b$ \\
\hline 
$E_{\gamma} - E_{\rm p}$ & 52.26 $\pm$ 0.09 & 1.69 $\pm$ 0.11  \\ 
$E_{\rm iso}-E_{\rm p} - t_{\rm b}$ & 52.83 $\pm$ 0.10 & 2.28 $\pm$ 0.30 \\
 &  & $-1.07$ $\pm$ 0.21  \\
\hline 
\end{tabular}
\end{table}