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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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