\begin{table}%T1
\par
%\centering
\par
\caption{The first two
columns are explicit. The third column shows the number of 
SUMER data files used
to compute the average
intensity. The fourth column shows (in percent) the statistical 
standard
deviation of the averaged intensity, while the
fifth column shows the averaged intensity. 
The sixth column
shows intensity values from NRLEUV. The seventh column gives, when available, values from: 
$^{1}$ Wilhelm et~al. (\cite{wilhelm2}), observed near disk 
center. $^{2}$ Wilhelm et~al. (\cite{wilhelm2}), mean intensity
deduced from full Sun observation. All intensities are in mW~m$^{-2}$~sr$^{-1}$.\label{tab:opticallythickline}}
\begin{tabular}{llccccc}
\hline\hline
\multicolumn{7}{c}{Optically thick lines observed with SUMER} \\ 
\hline
$\lambda (\AA)$ & Ion & $N$ & $\sigma$ (\%) & $I_{\rm obs}$ & $I_{\rm nrleuv}$ &
Others\\ \hline
917.18 & H I & 50 & 25 & 16.6 & 16.5 &  \\
918.13 & H I & 50 & 24 & 19.5 & 17.0 &  \\
919.34 & H I, O I & 50 & 64 & 15.9 & 18.4 &  \\
920.96 & H I & 50 & 24 & 21.6 & 18.9 &  \\
921.57 & O I & 50 & 41 & 1.7 &  &  \\
922.02 & N IV, O I & 40 & 35 & 8.5 & 1.0 &  \\
923.21 & H I, O I & 31 & 20 & 32.1 & 22.8 &  \\
924.95 & O I & 31 & 25 & 2.8 &  &  \\
925.44 & O I & 31 & 28 & 1.4 &  &  \\
926.24 & H I, He II & 31 & 45 & 26.9 & 24.2 &  \\
926.91 & O I & 31 & 25 & 2.0 &  &  \\
927.88 & He II & 31 & 58 & 1.7 &  &  \\
928.47 & Fe III & 31 & 33 & 0.9 &  &  \\
929.52 & O I, Fe III & 31 & 40 & 4.0 &  &  \\
930.79 & H I, He II & 31 & 20 & 38.2 & 30.5 &  \\
931.45 & O I, O I & 31 & 22 & 3.1 &  &  \\
932.25 & O I & 31 & 30 & 1.0 &  &  \\
934.70 & Fe III & 31 & 44 & 0.9 &  &  \\
935.19 & O I & 30 & 37 & 1.6 &  &  \\
936.63 & O I & 30 & 27 & 4.4 &  &  \\
937.80 & H I & 30 & 23 & 59.3 & 48.5 &37.7$^{1}$, 59.1$^{2}$\\
938.65 & O I & 30 & 32 & 2.8 &  &  \\
939.23 & O I & 30 & 25 & 2.4 &  &  \\
939.84 & O I & 30 & 26 & 1.5 &  &  \\
942.54 & He II & 30 & 58 & 3.6 &  &  \\
945.28 & C I & 17 & 36 & 1.1 &  &  \\
945.54 & C I & 17 & 25 & 1.2 &  &  \\
946.20 & C II & 17 & 23 & 1.3 &  &  \\
946.65 & Mg II & 17 & 14 & 0.7 &  &  \\
948.68 & O I & 15 & 17 & 4.6 &  &  \\
949.75 & H I & 15 & 14 & 83.3 & 82.1 & 59.1$^{1}$\\
950.73 & O I & 15 & 16 & 5.9 &  &  \\
952.35 & O I & 15 & 11 & 1.7 &  &  \\
952.94 & O I & 15 & 18 & 1.1 &  &  \\
953.41 & N I & 3 & 14 & 0.7 &  &  \\
953.66 & N I & 3 & 12 & 0.8 &  &  \\
953.97 & N I & 3 & 12 & 0.8 &  &  \\
958.67 & He II & 3 & 16 & 4.3 &  &  \\
963.99 & N I & 3 & 6 & 1.6 &  &  \\
964.63 & N I & 3 & 8 & 1.2 &  &  \\
968.95 & Fe III & 3 & 8 & 1.2 &  &  \\
971.72 & O I & 12 & 29 & 12.4 &  &  \\
\hline
972.56 & H I & 12 & 21 & 208.6 & 169.0 & 136.0$^{1}$\\
973.23 & O I & 12 & 29 & 9.7 &  &  \\
973.89 & O I & 12 & 27 & 4.7 &  &  \\
977.96 & O I & 12 & 38 & 7.1 &  &  \\
981.37 & Fe III & 12 & 48 & 5.0 &  &  \\
983.86 & Fe III & 12 & 46 & 4.9 &  &  \\
985.82 & Fe III & 12 & 45 & 3.3 &  &  \\
990.19 & O I & 12 & 22 & 10.9 &  &  \\
990.76 & Fe III & 12 & 27 & 6.5 &  &  \\
992.36 & He II & 13 & 45 & 10.1 &  &  \\
992.68 & Si II & 13 & 29 & 4.7 &  &  \\
993.09 & Fe III & 13 & 43 & 3.2 &  &  \\
997.09 & Fe III & 13 & 47 & 3.6 &  &  \\
999.50 & O I & 13 & 26 & 8.6 &  &  \\
1000.16 & Ar VI & 13 & 36 & 3.0 &  &  \\
1017.28 & Fe III & 4 & 36 & 1.1 &  &  \\
1017.74 & Fe III & 3 & 28 & 0.7 &  &  \\
1018.28 & Fe III & 4 & 16 & 0.6 &  &  \\
1025.71 & H I & 5 & 17 & 751.7 & 747.0 & 766.0$^{1}$ \\
1027.41 & O I & 13 & 12 & 27.0 &  &  \\
1028.16 & O I & 13 & 31 & 14.1 &  &  \\
1039.22 & O I & 14 & 12 & 5.5 &  &  \\
1040.94 & O I & 16 & 15 & 5.2 &  &  \\
1041.69 & O I & 16 & 16 & 4.3 &  &  \\
1063.85 & Fe III & 16 & 25 & 6.0 &  &  \\
1064.61 & Fe III & 10 & 19 & 5.2 &  &  \\
\hline
\end{tabular}
\end{table}