\begin{table}%t1
\caption {\label{Tab:1}Logarithms of the mean luminosity ($L/L_\odot$) for models lying
in the instability strip
computed with HHeB, CHeB, and CHeBm.}
%\centering
\par
\begin{tabular}{ l  l  l    l }\hline\hline
\noalign{\smallskip}
$M/M_\odot$ & HHeB & CHeB & CHeBm\\ \hline
4.0 & 2.440 & 2.613 & 2.602\\
5.0 & 2.949 & 3.025 & 2.964\\
6.0 & 3.235 & 3.300 & 3.198\\
7.0 & 3.470 & 3.554 & 3.442\\
8.0 & 3.666 & 3.755 & 3.747\\
9.0 & 3.818 & 3.939 & 3.891\\
10.0& 3.926 & 4.116 & 4.048\\ \hline
\end{tabular}
\end{table}