Table 3
Comparison of line moments between minimum and maximum brightness cases.
| Line | Min | Max | ||||
| Position | Width | Skewness | Position | Width | Skewness | |
| (km s-1) | (km s-1) | |||||
|
|
||||||
| Ne x λ12.132 | −213 ± 38 | 1253 ± 20 | 0.318 ± 0.064 | −233 ± 35 | 1258 ± 18 | 0.284 ± 0.058 |
| Fe xvii λ15.014 | −184 ± 20 | 991 ± 10 | 0.339 ± 0.039 | −197 ± 17 | 968 ± 9 | 0.363 ± 0.035 |
| Fe xvii λ15.261 | −280 ± 30 | 1059 ± 15 | 0.375 ± 0.053 | −259 ± 28 | 1095 ± 13 | 0.336 ± 0.045 |
| Fe xvii λ16.780 | −302 ± 29 | 882 ± 15 | 0.448 ± 0.061 | −318 ± 25 | 881 ± 13 | 0.438 ± 0.055 |
| Fe xvii λ17.051,17.096 | −238 ± 34 | 1202 ± 18 | 0.178 ± 0.066 | −206 ± 27 | 1169 ± 16 | 0.163 ± 0.060 |
| O viii λ18.967 | −447 ± 36 | 1307 ± 26 | 0.435 ± 0.085 | −362 ± 32 | 1321 ± 22 | 0.426 ± 0.071 |
| N vii λ24.779 | −132 ± 37 | 1500 ± 23 | 0.259 ± 0.068 | −89 ± 34 | 1523 ± 20 | 0.246 ± 0.060 |
| Averages | −257 ± 12 | 1171 ± 7 | 0.336 ± 0.024 | −238 ± 11 | 1174 ± 6 | 0.322 ± 0.021 |
Notes. Columns provide position = M1 = ∑ Fi × vi/ ∑ Fi, width 
, and skewness 
where M0 = ∑ Fi, M2 = ∑ Fi × (vi−M1)2/ ∑ Fi, and M3 = ∑ Fi × (vi−M1)3/ ∑ Fi. The intervals in which these parameters were evaluated are shown in Fig. 6. The errors were derived from error propagation, hence systematic uncertainties are not included. For example, the RGS wavelength scale display variations with σ ~ 5 mÅ (de Vries et al. 2015), corresponding to an additional error of 60–125 km s-1 on the positions of the chosen lines.
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