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Table 1

H- and He-like line fluxes (in 10-4 photons s-1 cm-2) measured and derived from the models discussed in Sect. 4.

Ion Data Model Aa Model Bb Model Cc Model Dd
O VII λ21.8................................... 1.21 0.92 0.85 0.45 0.40–1.53
O VII λ21.6................................... 1.66 1.11 1.03 0.53 0.48–1.59
O VIII λ18.97................................. 8.49 8.57 9.35 2.24 3.45–9.33
Ne IX λ13.55 + Fe XIX λ13.551 + Fe XX λ13.535 + λ13.533 0.56 0.54 0.53 0.14 0.25–0.71
Ne IX λ13.45 + Fe XIX λ13.462.................. 1.47 0.73 0.75 0.20 0.36–1.00
Ne X λ12.13 + Fe XVII λ12.124.................. 4.07 3.36 3.82 0.58 1.49–4.01
Mg XI λ9.23 + Fe XXII λ9.231................... 0.34 0.26 0.28 0.05 0.13–0.36
Mg XI λ9.16.................................. 0.57 0.36 0.39 0.07 0.17–0.47
Mg XII λ8.42................................. 1.51 1.70 1.97 0.21 0.65–1.72
Si XIII λ6.74.................................. 0.20 ··· ··· ··· ···
Si XIII λ6.68 + λ6.663 + λ6.664................... 0.45 0.39 0.40 0.06 0.16–0.40
Si XIII λ6.64.................................. 0.83 0.59 0.63 0.09 0.24–0.59
Si XIV λ6.18.................................. 1.86 2.14 2.54 0.23 0.83–2.22
S XV λ5.10 + λ5.098 + λ5.103..................... 0.09 ··· ··· ··· ···
S XV λ5.06 + λ5.050............................ 0.27 0.33 0.34 0.03 0.10–0.28
S XV λ5.04................................... 0.48 0.40 0.44 0.05 0.17–0.42
S XVI λ4.73.................................. 1.01 1.14 1.41 0.11 0.43–1.19
Ar XVII λ3.944 + λ3.961 + λ3.965................. 0.14 0.11 0.18 0.01 0.05–0.12
Ar XVII λ3.994 + S XVI λ3.991 + λ3.992........... 0.18 ··· ··· ··· ···
Ar XVIII λ3.73............................... 0.23 0.19 0.25 0.02 0.08–0.22
Ca XIX λ3.184 + λ3.211........................ 0.17 0.13 0.16 0.02 0.05–0.14
Ca XX λ3.02.................................. 0.18 0.14 0.19 0.02 0.04–0.14
Fe XXV λ1.85................................ 1.96 1.05 1.37 0.21 0.35–0.97
Fe XXV λ1.865 + λ1.868........................ 1.47 0.68 0.88 0.13 0.25–0.67
Fe XXVI λ1.78............................... 1.27 0.87 1.26 0.16 0.13–1.02

Notes.

(a)

Cooling flow model. Geometry of the accretion column: cylinder. No gravity. Solar abundances. Fractional area f = 10-4, accretion rate Ṁ = 1.74 × 10-11M⊙ yr-1.

(b)

Suleimanov et al. (2005) model. Geometry of the accretion column: magnetic dipole. Solar abundances. Accretion rate Ṁ = 1.74 × 10-11M⊙ yr-1, specific accretion rate a = 0.6 g cm-2 s-1.

(c)

Cooling flow model. Geometry of the accretion column: cylinder. Abundances 0.1 solar. Fractional area f=10-4, accretion rate Ṁ = 1.74 × 10-11M⊙ yr-1.

(d)

EMD derived empirically from the measured flux ratios of H- and He-like lines of O, Ne, Mg, Si, S, Ar, Ca, and Fe. Error bars were determined at the 90% confidence level.

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