\begin{table}[hbt]
\caption{Gas Fraction in Groups/Clusters: Observed and Extrapolated}
\scriptsize
\begin{tabular}{lcccccc}
\hline \hline\\
\footnotesize \textbf{Reference} &\footnotesize
\textbf{$\left<\textrm{kT}\right>$} &\footnotesize \textbf{$\alpha{}_{gas}$} &\footnotesize
\textbf{$\fg{}_{,500}$} & \footnotesize \textbf{$\fg{}_{,200}$} &
\footnotesize \textbf{$\fg{}_{,vir}$} & \textbf{$\fg{}_{,1.2vir}$} \\
\footnotesize (1) & \footnotesize (2)& \footnotesize (3)&
\footnotesize (4)& \footnotesize (5)& \footnotesize (6) &
\footnotesize (7) \\\\
\hline
G09 Bin 1 & 0.9 \keV&$1.7\pm0.20$& $0.074 \pm 0.028\phantom{^*}$ & $0.100\pm0.039^*$ &
$0.131\pm0.052^*$ & $0.156\pm0.062^*$ \\
\phantom{G09} Bin 2 &1.6 \keV&$1.8\pm0.20$ & $0.068 \pm 0.005\phantom{^*}$ &
$0.091\pm0.009^*$ & $0.117\pm0.014^*$ & $0.137\pm0.019^*$ \\
\phantom{G09} Bin 3 & 2.8 \keV&$1.9\pm0.07$ & $0.080 \pm 0.003\phantom{^*}$ &
$0.103\pm0.005^*$ & $0.129\pm0.006^*$ & $0.149\pm0.008^*$ \\
\phantom{G09} Bin 4 &  5.0 \keV&$2.1\pm0.02$&  $0.103 \pm 0.008\phantom{^*}$ & $0.124\pm0.010^*$&$0.146\pm0.012^*$&$0.162\pm0.013^*$ \\
\phantom{G09} Bin 5 & 8.6 \keV&$2.3\pm0.02$&  $0.123 \pm 0.007\phantom{^*}$ &
$0.137\pm0.008^*$& $0.153\pm0.009^*$ & $0.165\pm0.010^*$\\
PC13 &$\dagger$ & $\dagger$& $0.125\pm0.005\phantom{^*}$ & $0.137\pm0.003\phantom{^*}$ &
$0.145\pm0.010\phantom{^*}$&$0.151\pm0.009\phantom{^*}$\\
E13 - CC &6.3 \keV& $2.2\pm0.05$& $0.115\pm0.010\phantom{^*}$ & $0.134\pm0.011\phantom{^*}$ & $0.153\pm0.013^*$&$0.167\pm0.014^*$ \\
U09 & 9.7 \keV&$2.4\pm0.10$& $0.126\pm0.019\phantom{^*}$ & $0.133\pm0.020\phantom{^*}$ & $0.143\pm0.022^*$&$0.151\pm0.024^*$\\
\hline
\end{tabular}
\caption*{\small{(1) Reference abbreviations as in Table
    \ref{tab:F_gas_obs}. \\ (2) The median temperature of the
    groups/clusters in each sample. \\ (3) The gas density slope
    derived from R11.\\ (4) $\fg(<\rfive)$ (5) $\fg(<\rtwo)$ (6)
    $\fg(<\rvir)$ (7) $\fg(<1.2\rvir)$\\ *: Value
    represents extrapolation using the method of Section
    \ref{sec:Gas.Extrapolation}.\\ $\dagger$: No extrapolation required;
    T and $\alpha_{gas}$ not calculated. }}
\label{tab:F_gas_all}
\end{table}
