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Table 1
Total column density 
(in cm-2) of the warm absorber medium as a function of the theoretical ionization parameter ξtot (in erg cm s-1) and the thermal state.
| Cold state | Hot state | |||
| ξtot |
|
|
||
|
|
||||
| 2000 | 2.3 × 1022 | 3.2 × 1022 | ||
| 4000 | 4.7 × 1022 | 6.2 × 1022 | ||
| 8000 | 6.0 × 1022 | 7.4 × 1022 | ||
| 16 000 | 7.6 × 1022 | 8.9 × 1022 | ||
| 20 000 | 8.3 × 1022 | 9.0 × 1022 | ||
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