\begin{table}%t2
  %\centering
\par
    \caption {\label{Tab:fRGB}The $f$ parameter for \mbox{$M=1 ~{M}_\odot$} K and M giants and subgiants with $\rm C/O=0.5$, at $\tau_{\rm Ross}=2/3$.
    }
    \begin{tabular}{ccc}
      \hline\hline
      $T_{\rm eff}$ (K) & $\log g$ & $f$\\
      \hline
      5000 & 0 & 0.97\\
      4000 & 0 & 0.43\\
      3000 & 0 & 0.18\\
      5000 & 3 & $9.6\times 10^{-4}$\\
      4000 & 3 & $4.3 \times 10^{-4}$\\
      3000 & 3 & $1.2\times  10^{-4}$\\
      \hline
    \end{tabular}
\end{table}