Table 2: Calculated and observed mean intensities for optically thin lines used in the DEM computation. The first three columns are explicit. The fourth column shows the number of SUMER data files used to compute the mean intensity. The fifth column shows (in percent) the statistical standard deviation of the mean intensity. The sixth and seventh columns show the mean (or "observed'') and calculated intensity. The eighth column shows their ratio.
Ion $\lambda (\AA)$ Log (T) N $\sigma$ (%) $I_{\rm obs}$ $I_{\rm calc}$ $I_{\rm calc}/I_{\rm obs}$
S II 996.000 4.2 4 30 1.0 1.0 0.98
C II 1036.32 4.3 19 13 49.5 71.5 1.44
N II 1085.68 4.4 6 5 55.2 46.7 0.85
S III 1012.53 4.7 2 28 0.7 1.0 1.49
N III 764.360 4.9 55 24 5.3 5.7 1.07
N III 763.340 4.9 53 25 2.8 2.9 1.05
S IV 1072.98 5.0 13 35 6.7 5.5 0.82
O IV 790.220 5.2 27 19 88.6 99.4 1.12
O IV 787.700 5.2 31 30 46.5 55.0 1.18
S V 786.480 5.2 43 29 27.5 16.2 0.59
N IV 765.150 5.2 68 23 63.3 45.8 0.72
O V 759.440 5.4 53 27 4.0 4.3 1.07
O V 760.450 5.4 65 24 17.8 20.0 1.13
O V 762.000 5.4 53 26 5.2 5.3 1.02
O V 758.680 5.4 53 24 5.3 5.7 1.07
O VI 1037.60 5.5 28 24 150.0 93.1 0.62
O VI 1031.93 5.5 28 18 337.4 186.8 0.55
Ne VIII 780.330 5.8 53 31 29.1 33.0 1.13
Ne VIII 770.410 5.8 68 30 61.4 65.8 1.07
Mg VIII 772.260 5.9 9 50 1.4 2.3 1.64
S X 776.370 6.1 52 33 0.9 0.8 0.85
Si XII1 499.410 6.3 1 30 51.3 51.1 1.00
1 Intensity for Si XII line comes from Vernazza & Reeves (1978).
We assume $\sigma=30$% for this line. All intensities are in mW m-2 sr-1.

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