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Table 2

Narrow emission line best fit intensities from the 2012–2013 stacked spectrum and 2004–2007 stacked spectrum.

Line transitiona Rest λ 2012–13 Intensity 2004–07 Intensity 2004–07 (G09) Intensity
(Å) (10-5 ph cm-2 s-1) (10-5 ph cm-2 s-1) (10-5 ph cm-2 s-1)
Ne X 1s–2p 12.14 0.85 ± 0.11 1.12 ± 0.11 1.0 ± 0.2
Fe XXI * 12.29 0.20 ± 0.09 0.21 ± 0.08 −
Ne IX r 13.45 0.99 ± 0.13 1.28 ± 0.11 0.42 ± 0.18
Ne IX i 13.55 <0.13 <0.08 <0.33
Ne IX f 13.70 0.90 ± 0.10 1.02 0.40 ± 0.12
O VIII RRC 14.23 0.44 ± 0.07 0.59 ± 0.07 0.42 ± 0.13
Fe XVIII * 14.41 0.33 ± 0.10 0.20 ± 0.05 −
Fe XVII 3d–2p 15.03 1.63 ± 0.09 1.66 ± 0.09 1.49 ± 0.17
O VIII 1s–4p / 15.18
Fe XVII 3d–2p 15.26 1.18 ± 0.10 1.02 −
O VIII 1s–3p 16.01 0.87 ± 0.08 0.81 ± 0.07 0.75 ± 0.13
O VII RRC / 16.77
Fe XVII 2s–2p 16.78 1.05 ± 0.08 1.12 ± 0.08 0.47 ± 0.15
Fe XVII 3s–2p 17.07 2.31 ± 0.12 2.73 ± 0.11 1.89 ± 0.19
N VII RRC / 18.59
O VII 1s–3p 18.63 0.25 ± 0.07 0.51 ± 0.10 −
O VIII 1s–2p 18.97 2.65 ± 0.13 2.97 2.5 ± 0.2
O VII r 21.60 1.23 ± 0.16 1.01 ± 0.15 1.0 ± 0.2
O VII i 21.81 0.50 ± 0.13 0.58 ± 0.13 0.6 ± 0.2
O VII f 22.10 2.04 ± 0.19 2.23 ± 0.19 2.4 ± 0.3
N VII 1s–2p 24.78 1.35 ± 0.13 1.60 ± 0.12 1.2 ± 0.2
N VI 1s–3p 24.90 0.66 ± 0.10 0.47 ± 0.08 −
C VI 1s–4p 26.99 0.27 ± 0.09 0.12 0.40 ± 0.18
C VI 1s–3p 28.44 0.23 ± 0.13 0.61 ± 0.13 0.6 ± 0.3
N VI r 28.79 0.34 ± 0.18 0.26 ± 0.14 0.7 ± 0.4
N VI i 29.08 0.24 ± 0.15 0.25 ± 0.14 <0.6
N VI f 29.53 1.70 ± 0.20 1.61 ± 0.18 1.8 ± 0.3
C VI 1s–2p 33.74 1.30 ± 0.24 1.86 1.4 ± 0.5

Notes. A star marks uncertainty in the assigned transition. Overall C-statistic = 1445 (2012–13) and 1548 (2004–07).

(a)

r, i and f represent the resonance, intercombination and forbidden lines of an He-like triplet, respectively.

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