\begin{table}%t1
\caption{\label{taba1}Parameter $c(\gamma)$ for use in Eq.~(\ref{eqa12}).}
%\centering
\par
\begin{tabular}{lccccccc}
\hline \hline
$\gamma$ & 1.5 & 2  & 2.5 & 3 & 3.5 & 4 & 4.5 \\
\hline
$c(\gamma)$ & 0.724 & 0.492 & 0.367 & 0.289 & 0.236 & 0.197 & 0.169 \\
\hline
\end{tabular}
\end{table}