\begin{table}%t2
\caption{Contribution of the Outer Heliosphere, up to $\sim$170 AU UW, $\sim$300 AU CW and $\sim$3000 AU DW, to the X-ray intensity due to CX 
between heavy SW ions and IS H atoms and to the total directional X-ray intensity (H+He) within 100 AU.\label{External_table}}
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\begin{tabular}{@{}l@{}ccccccc @{}}\hline \hline
\multicolumn{2}{c}{}& \multicolumn{6}{c}{H/He emission within 100 AU} \\\hline 
\multicolumn{2}{c}{}& \multicolumn{2}{c}{UW} & \multicolumn{2}{c}{CW} & \multicolumn{2}{c}{DW} \\ 
\multicolumn{2}{c}{}& \multicolumn{2}{c}{2.7} & \multicolumn{2}{c}{1.08} & \multicolumn{2}{c}{0.15} \\ \hline %\hline
\multicolumn{2}{c}{}& \multicolumn{6}{c}{\%  LOS} \\ \hline
$X^{\rm Q+}$ & $\sigma_{({\rm H}, {\rm X}^{Q+})}$  & H$^a$ & H+He$^b$& H & H+He & H & H+He 
\\ 
& $(10^{-15}$~cm$^2$) & & & & & &\\ \hline
C$^{6+}$& 4.16 & 1.8 & 1.31 & 4.3 & 2.24 & 15 & 1.95 \\
C$^{5+}$& 2.00 & 2.7 & 1.97 & 7.3 & 3.8 & 37.9 & 4.93 \\
N$^{7+}$& 5.67 & 1.4 & 1.02 & 3.0 & 1.56 & 9.9 & 1.29 \\
N$^{6+}$& 3.71 & 1.9 & 1.39 & 4.7 & 2.44 & 17 & 2.21 \\
N$^{5+}$& 2.27 & 2.4 & 1.75 & 6.7 & 3.48 & 32 & 4.16\\
O$^{8+}$& 5.65 & 1.3 & 0.95 & 2.9 & 1.51 & 9.8 & 1.27\\
O$^{7+}$& 3.40 & 1.9 & 1.39 & 4.9 & 2.55 & 19 & 2.47\\
O$^{6+}$& 3.67 & 1.8 & 1.31 & 4.7 & 2.44 & 17.2 & 2.24\\
Ne$^{9+}$& 7.20 & 0.97 & 0.71 & 2.1 & 1.09 & 7.1 & 0.92\\
Ne$^{8+}$& 3.70 & 1.7 & 1.24 & 4.5 & 2.34 & 16.9 & 2.2\\
Mg$^{11+}$& 7.5 & 0.9 & 0.66 & 2.0 & 1.04 & 6.7 & 0.87\\ 
Mg$^{10+}$& 3.73 & 1.6 & 1.17 & 4.4 & 2.29 & 16.6 & 2.16\\ \hline
\end{tabular}}\medskip
$^a$  \% to add to the emission due to CX with H; $^b$ \% to add to the 
total emission due to CX with H and He. 
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\end{table}