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Table 5

Magnesium emission lines in the low- and high-hardness spectra.

Reference Bayesian v Line Value
wavelength Blocks αsig flux
[Å] [ km s-1] [ph s-1 cm-2 × 10-5]

High hardness Mg xii Lyα 8.42101 ± 4.0 × 10-5 d 5.4 140 ± 80
Mg xi i 9.22990e 5.4b = v Mg xii Lyα
R ratioc 1.5 ± 0.7f
G ratioc f

Low hardness Mg xii Lyα 8.42101 ± 4.0 × 10-5 d noa ... ...
Mg xi r 9.16896e >7b −130 ± 60
Mg xi i 9.22990e >7b = v Mg xi r
Mg xi f 9.31455 e >7b = v Mg xi r



We run line searches for αsig ≥ 1.5.


The He-like triplet is detected as a single excess feature covering all three lines (r, f and i).


All three triplet lines are assumed to have the same velocity.


Drake (1988); for a discussion of errors on Drake (1988) values, see Notes to Table 4.


These ratios formally correspond to fluxes of 2.7 × 10-5 ph s-1 cm-2 for Mg xi f and 2.1 × 10-5 ph s-1 cm-2 for Mg xi r.

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