Table 6: Laboratory wavelength, formal EW and outflow velocity for the X-ray absorption lines. The EW and the column densities predicted by models M1 and M2 assume different covering factors for the absorbing gas and are discussed in the text.
Ion Transition $\lambda$ EW $v_{\rm out}$ EW Log $N_{\rm ion}$ EW Log $N_{\rm ion}$ Notes
    (Å) (mÅ) km s-1 (mÅ) ${\rm cm}^{-2}$ (mÅ) ${\rm cm}^{-2}$  
      Obs. Obs. M 1 M 1 M 2 M 2  
C IV   41.42 6 $\pm$ 17   8 15.13 $\pm$ 1.14 8 15.16 $\pm$ 1.11 1
    40.94 43 $\pm$ 29   1   1   1
C V 1s2-1s2p 1P1 40.268 29 $\pm$ 20 -380 $\pm$ 70 40 16.92 $\pm$ 0.34 48 16.88 $\pm$ 0.31 1
  1s2-1s3p 1P1 34.973 25 $\pm$ 8   27   27   2
  1s2-1s4p 1P1 33.426 14 $\pm$ 7   18   19    
  1s2-1s5p 1P1 32.754 21 $\pm$ 7   12   13    
  1s2-1s6p 1P1 32.400 7 $\pm$ 7   8   9    
C VI 1s-2p (Ly$\alpha$) 33.736 36 $\pm$ 8 -390 $\pm$ 140 33 17.1 $\pm$ 0.35 37 17.02 $\pm$ 0.30 2
  1s-3p (Ly$\beta$) 28.466 12 $\pm$ 6   19   20    
  1s-4p (Ly$\gamma$) 26.990 20 $\pm$ 6   11   13    
  1s-5p (Ly$\delta$) 26.357 7 $\pm$ 6   7   8    
  1s-6p (Ly$\epsilon$) 26.026 -4 $\pm$ 11   4   5    
N V   29.42 4 $\pm$ 8   4 <15.9 4 <15.9  
N VI 1s2-1s2p 1P1 28.787 28 $\pm$ 6 -320 $\pm$ 180 22 16.30 $\pm$ 0.36 23 16.34 $\pm$ 0.34  
  1s2-1s3p 1P1 24.900 13 $\pm$ 6   10   10    
  1s2-1s4p 1P1 23.771 -8 $\pm$ 6   5   5    
N VII 1s-2p (Ly$\alpha$) 24.781 15 $\pm$ 6 -320 $\pm$ 130 14 16.16 $\pm$ 0.63 14 16.18 $\pm$ 0.57  
  1s-3p (Ly$\beta$) 20.910             3
  1s-4p (Ly$\gamma$) 19.826 -2 $\pm$ 6   1   1    
O I 1s-2p 23.52 4 $\pm$ 6   4 <16.5 4 <16.6  
O II 1s-2p 23.30 -1 $\pm$ 6   0 <16 0 <16  
O III 1s-2p 23.11 4 $\pm$ 6   4 <16.5 4 <16.5  
O IV 1s-2p 22.69 15 $\pm$ 7   15 16.51 $\pm$ 0.77 15 16.53 $\pm$ 0.68 4
O V 1s-2p 22.374 18 $\pm$ 6   13 16.10 $\pm$ 0.51 13 16.14 $\pm$ 0.50  
  1s-3p 19.92 -9 $\pm$ 7   4   4    
  1s-4p 19.33 6 $\pm$ 6   2   2    
O VI 1s22s-1s2s(1S)2p 22.01 19 $\pm$ 8 +28 $\pm$ 120 19 16.72 $\pm$ 0.45 20 16.72 $\pm$ 0.43  
  1s22s-1s2s(3S)2p 21.79 2 $\pm$ 7   9   8    
  1s22s-1s2s(3S)3p 19.34 16 $\pm$ 6   9   9    
O VII 1s2-1s2p 1P1 21.602 28 $\pm$ 7 -120 $\pm$ 80 21 17.0 $\pm$ 0.4 25 17.07 $\pm$ 0.35  
  1s2-1s3p 1P1 18.629 17 $\pm$ 5   13   14    
  1s2-1s4p 1P1 17.768 10 $\pm$ 5   9   9    
  1s2-1s5p 1P1 17.396 -1 $\pm$ 5   6   6    
O VIII 1s-2p (Ly$\alpha$) 18.969 17 $\pm$ 5 -440 $\pm$ 170 13 16.45 $\pm$ 0.48 13 16.50 $\pm$ 0.47  
  1s-3p (Ly$\beta$) 16.006 1 $\pm$ 5   4   4    
  1s-4p (Ly$\gamma$) 15.176 -4 $\pm$ 5   2   2    
Ne VI 1s-2p 14.02 3 $\pm$ 5   3 <16.7 3 <16.7  
Ne VII 1s-2p 13.81 7 $\pm$ 5   7 <16.8 7 <16.8  
Ne VIII 1s22s-1s2s(1S)2p 13.65 7 $\pm$ 5   6 16.1 $\pm$ 0.9 6 16.1 $\pm$ 0.87  
  2s-4p 67.382 21 $\pm$ 25   25   25    
Ne IX 1s2-1s2p 1P1 13.447 10 $\pm$ 4 -270 $\pm$ 500 8 16.23 $\pm$ 0.65 8 16.27 $\pm$ 0.61  
  1s2-1s3p 1P1 11.547 -2 $\pm$ 5   2   2    
Ne X 1s-2p (Ly$\alpha$) 12.134 -2 $\pm$ 5   0 <16.23 0 <16.25  
Mg X 2s-3p 2P1/2 57.920 11 $\pm$ 13   14 15.75 $\pm$ 0.49 14 15.76 $\pm$ 0.48  
  2s-3p 2P3/2 57.876 24 $\pm$ 12   22   22    
Si VIII 2p-3d 4P5/2 61.070 18 $\pm$ 12   18 <15.6 18 <15.6 5
Si IX 2p-3d 3D1 55.305 25 $\pm$ 10 -600 $\pm$ 300 33 15.23 $\pm$ 0.52 30 15.26 $\pm$ 0.48  
Si X 2p-3d 50.524 -1 $\pm$ 12   0 <15.0 0 <15.1  
  2s-3p 2D3/2 47.489 -3 $\pm$ 7   0   0    
Si XI 2s-3p 1P1 43.762 5 $\pm$ 6   5 <15.4 5 <15.4  
Si XII 2s-3p 2P1/2 40.911 16 $\pm$ 23   16 <16.51 16 <16.53 1
  2s-4p 2P1/2 31.015 5 $\pm$ 7   5   5    
1 In instrumental CI edge; 2 Slightly broadened; 3 Blended with the Galactic OVII resonance line; 4 Wavelength uncertain; 5 fit included other triplet lines with predicted ratio.

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