\begin{table}%t1
   \caption{Orbital parameters {adopted for} the $\gamma$-ray binaries.\label{orbits}}
   \small%\centering
\par
  \begin{tabular}{@{}lcccccc@{}}
\hline\hline
System & $P_{\rm orb}$ & $e$ & $M_2$ & $d_{S}$ & $R_\star$ & $T_\star$\\
 & (d) &  & ($M_\odot$) & (AU) & ($R_\odot$) & ($10^4$~K)\\
\hline
\ls & 3.9 & 0.35 & 23 & 0.1--0.2 & 9.3 & 3.9  \\
\lsi & 26.5 & 0.72 & 12 & 0.1--0.7 & 10 & 2.2  \\
\psrb & 1237 & 0.87 & 10 & 0.7--10 & 10 & 2.7  \\
\hline
\end{tabular}
\end{table}