\begin{table}%t6
\caption{Abundance enhancement factors (with respect to photospheric
           composition) for the low FIP~elements in the selected
           segments. $\beta$ is the FIP~bias deduced from the observed
           \ion{Mg}{vi}~(349.2~\AA)/\ion{Ne}{vi}~(562.8~\AA) line
           intensity ratio as in \citet{Young_Mason:97}. The result
           for \element{Ar} in segment~2(1) is not reported because
           the estimated error is very large.}
\label{tab:fip_segments}
%\centering
\par
\begin{tabular}{llcccccccc}
\hline  \hline
Region               & Segment & \multicolumn{7}{c}{Enhancement factor} & $\beta$ \\
                     &         & \element{Al}        & \element{Ca}        & \element{Mg}        & \element{Fe}        & \element{Si}        & \element{O}         & \element{Ar}     &  \\
\hline
Extended brightening & 1(0)    & $\rm 0.5_{-0.2}^{+0.2}$ & $\rm 1.9_{-1.5}^{+0.9}$ & $\rm 1.7_{-0.3}^{+0.3}$ & $\rm 1.2_{-0.5}^{+0.6}$ & $\rm 1.5_{-0.3}^{+0.2}$ & $\rm 0.6_{-0.2}^{+0.2}$ & $\rm 2.1_{-0.9}^{+0.9}$ & 3.6 \\
                     & 2(1)    & $\rm 1.1_{-0.5}^{+0.6}$ & $\rm 1.7_{-1.0}^{+1.9}$ & $\rm 1.9_{-0.3}^{+0.3}$ & $\rm 2.2_{-0.7}^{+0.7}$ & $\rm 2.3_{-0.5}^{+0.5}$ & $\rm 0.6_{-0.1}^{+0.2}$ &                     & 3.5 \\
%\\
Narrow brightening   & 3(4)    & $\rm 1.1_{-0.4}^{+0.4}$ & $\rm 1.7_{-1.1}^{+1.5}$ & $\rm 1.7_{-0.3}^{+0.3}$ & $\rm 2.0_{-0.6}^{+0.8}$ & $\rm 1.7_{-0.5}^{+0.4}$ & $\rm 0.9_{-0.1}^{+0.2}$ & $\rm 1.8_{-0.8}^{+1.2}$ & 3.5 \\
                     & 5(7U)   & $\rm 1.0_{-0.4}^{+0.5}$ & $\rm 3.7_{-1.1}^{+1.9}$ & $\rm 1.5_{-0.3}^{+0.3}$ & $\rm 0.9_{-0.3}^{+0.3}$ & $\rm 1.0_{-0.2}^{+0.2}$ & $\rm 0.9_{-0.1}^{+0.2}$ & $\rm 1.5_{-0.7}^{+1.0}$ & 3.2 \\
                     & 7(8U)   & $\rm 0.8_{-0.5}^{+0.4}$ & $\rm 4.8_{-1.8}^{+2.8}$ & $\rm 1.7_{-0.3}^{+0.3}$ & $\rm 1.4_{-0.3}^{+0.5}$ & $\rm 1.6_{-0.3}^{+0.4}$ & $\rm 1.0_{-0.2}^{+0.2}$ & $\rm 0.5_{-0.3}^{+0.6}$ & 3.2 \\
                     & 8(9)    & $\rm 0.9_{-0.6}^{+0.5}$ & $\rm 2.1_{-0.6}^{+0.9}$ & $\rm 1.7_{-0.3}^{+0.3}$ & $\rm 0.7_{-0.2}^{+0.3}$ & $\rm 1.2_{-0.3}^{+0.2}$ & $\rm 1.0_{-0.2}^{+0.2}$ & $\rm 1.3_{-0.6}^{+0.8}$ & 3.1 \\
%\\
Dark regions         & 4(7L)   & $\rm 1.1_{-0.8}^{+0.8}$ & $\rm 2.6_{-1.0}^{+1.4}$ & $\rm 0.8_{-0.3}^{+0.3}$ & $\rm 0.9_{-0.4}^{+0.4}$ & $\rm 1.3_{-0.3}^{+0.3}$ & $\rm 0.7_{-0.1}^{+0.2}$ & $\rm 2.3_{-1.3}^{+0.8}$ & 1.5 \\
                     & 6(8L)   & $\rm 0.6_{-0.5}^{+0.4}$ & $\rm 2.3_{-1.7}^{+1.4}$ & $\rm 1.2_{-0.3}^{+0.3}$ & $\rm 0.6_{-0.2}^{+0.2}$ & $\rm 1.1_{-0.2}^{+0.2}$ & $\rm 0.9_{-0.2}^{+0.2}$ & $\rm 2.1_{-1.7}^{+1.2}$ & 2.6 \\
\hline
\end{tabular}
\end{table}