Table 2: Strongest lines measured in the RGS spectrum of SU Aur. Only lines with $S/N \ge 1.5$ are listed. Asterisks mark the lines used for the EM reconstruction. $\lambda _{\rm obs}$ is the measured wavelenght, $\lambda _{\rm pred}$ is the theoretical wavelenght of the transition, and $T_{\rm max}$ is the temperature of maximum emissivity in K.
  $\lambda _{\rm obs}$ Total counts Ion $\lambda _{\rm pred}$ Transition $\log T_{\rm max}$
  (Å)     (Å) ( $upper \rightarrow lower$)  
* $6.19\pm 0.03$ $27\pm 13$ Si XIV 6.18 $\rm 2p~^2P_{3/2} \rightarrow 1s~^2S_{1/2}$ 7.2
      Si XIV 6.19 $\rm 2p~^2P_{1/2} \rightarrow 1s~^2S_{1/2}$ 7.2
  $6.71\pm 0.04$ $23\pm 13$ Si XIII 6.65 $\rm 1s~2p~^1P_1 \rightarrow 1s^2~^1S_0$ 7.0
      Si XIII 6.69 $\rm 1s~2p~^3P_1 \rightarrow 1s^2~^1S_0$ 7.0
  $7.11\pm 0.02$ $25\pm 13$ Mg XII 7.11 $\rm 3p~^2P_{3/2} \rightarrow 1s~^2S_{1/2}$ 7.0
      Mg XII 7.11 $\rm 3p~^2P_{1/2} \rightarrow 1s~^2S_{1/2}$ 7.0
  $7.86\pm 0.03$ $25\pm 13$ Mg XI 7.85 $\rm 1s~3p~^1P_1 \rightarrow 1s^2~^1S_0$ 6.8
      Fe XXIII 7.90 $\rm 1s^2~2s~5d~^1D_2 \rightarrow 1s^2~2s~2p~^1P_1$ 7.2
      Al XII 7.87 $\rm 1s~2s~^3S_1 \rightarrow 1s^2~^1S_0$ 6.9
  $8.24\pm 0.03$ $29\pm 15$ Fe XXIV 8.23 $\rm 1s^2~4d~^2D_{3/2} \rightarrow 1s^2~2p~^2P_{1/2}$ 7.3
      Ni XXIII 8.27 $\rm 1s^2~2s^2~2p~4d~^3P_1 \rightarrow 1s^2~2s^2~2p^2~^3P_0$ 7.1
* $8.42\pm 0.02$ $49\pm 16$ Mg XII 8.42 $\rm 2p~^2P_{3/2} \rightarrow 1s~^2S_{1/2}$ 7.0
      Mg XII 8.42 $\rm 2p~^2P_{1/2} \rightarrow 1s~^2S_{1/2}$ 7.0
  $8.65\pm 0.04$ $26\pm 14$ Fe XXIII 8.62 $\rm 1s^2~2s~4d~^3D_3 \rightarrow 1s^2~2s~2p~^3P_2$ 7.2
      Fe XXI 8.61 $\rm 1s^2~2s^2~2p_{1/2}~5d_{3/2} \rightarrow 1s^2~2s^2~2p^2~^3P_1$ 7.1
      Fe XXI 8.64 $\rm 1s^2~2s^2~2p~5d~^3P_2 \rightarrow 1s^2~2s^2~2p^2~^3P_1$ 7.0
      Fe XXI 8.66 $\rm 1s^2~2s^2~2p~5d~^3F_3 \rightarrow 1s^2~2s^2~2p^2~^3P_2$ 7.0
  $8.92\pm 0.03$ $21\pm 13$ Fe XXIII 8.91 $\rm 1s^2~2s~4s~^1S_0 \rightarrow 1s^2~2s~2p~^1P_1$ 7.2
      Fe XXI 8.93 $\rm 1s^2~2s~2p_{1/2}^2~5s \rightarrow 1s^2~2s~2p^3~^3D_1$ 7.0
  $9.21\pm 0.02$ $43\pm 15$ Mg XI 9.23 $\rm 1s~2p~^3P_1 \rightarrow 1s^2~^1S_0$ 6.8
      Fe XXI 9.19 $\rm 1s^2~2s~2p_{1/2}^2~4p_{3/2} \rightarrow 1s^2~2s^2~2p^2~^3P_0$ 7.1
      Fe XX 9.19 $\rm 1s^2~2s~2p_{1/2}~2p_{3/2}^2~4p_{3/2} \rightarrow 2s^2~2p^3~^4S_{3/2}$ 7.0
  $9.35\pm 0.03$ $24\pm 14$ Mg XI 9.31 $\rm 1s~2s~^3S_1 \rightarrow 1s^2~^1S_0$ 6.8
  $9.47\pm 0.02$ $29\pm 15$ Fe XXI 9.48 $\rm 1s^2~2s^2~2p~4d~^3P_1 \rightarrow 1s^2~2s^2~2p^2~^3P_0$ 7.0
      Ne X 9.48 $\rm 5p~^2P_{3/2} \rightarrow 1s~^2S_{1/2}$ 6.8
  $9.71\pm 0.02$ $20\pm 14$ Ne X 9.71 $\rm 4p~^2P_{3/2} \rightarrow 1s~^2S_{1/2}$ 6.8
      Ne X 9.71 $\rm 4p~^2P_{1/2} \rightarrow 1s~^2S_{1/2}$ 6.8
      Fe XX 9.73 $\rm 1s^2~2s~2p_{1/2}^2~2p_{3/2}~4p_{3/2} \rightarrow 2s^2~2p^3~^4S_{3/2}$ 7.0
      Fe XIX 9.70 $\rm 2s^2~2p^3~(^2D)~5d~^3D_3 \rightarrow 2s^2~2p^4~^3P_2$ 6.9
      Fe XX 9.73 $\rm 1s^2~2s~2p_{1/2}^2~2p_{3/2}~4p_{3/2} \rightarrow 2s^2~2p^3~^4S_{3/2}$ 7.0
  $10.06\pm 0.02$ $32\pm 14$ Fe XX 10.05 $\rm 1s^2~2s^2~2p_{1/2}~2p_{3/2}~4d_{3/2} \rightarrow 2s^2~2p^3~^4S_{3/2}$ 7.0
      Fe XX 10.06 $\rm 1s^2~2s^2~2p_{1/2}~2p_{3/2}~4d_{3/2} \rightarrow 2s^2~2p^3~^4S_{3/2}$ 7.0
* $\rm 10.20\pm 0.02$ $39\pm 15$ Ne X 10.24 $\rm 3p~^2P_{3/2} \rightarrow 1s~^2S_{1/2}$ 6.8
      Ne X 10.24 $\rm 3p~^2P_{1/2} \rightarrow 1s~^2S_{1/2}$ 6.8
* $\rm 10.63\pm 0.01$ $43\pm 15$ Fe XXIV 10.62 $\rm 1s^2~3p~^2P_{3/2} \rightarrow 1s^2~2s~^2S_{1/2}$ 7.3
      Fe XXIV 10.66 $\rm 1s^2~3p~^2P_{1/2} \rightarrow 1s^2~2s~^2S_{1/2}$ 7.3
      Fe XIX 10.65 $\rm 2s^2~2p^3~(^2D)~4d~^3D_3 \rightarrow 2s^2~2p^4~^3P_2$ 6.9
      Fe XIX 10.64 $\rm 2s^2~2p^3~(^2D)~4d~^3P_2 \rightarrow 2s^2~2p^4~^3P_2$ 6.9
* $11.05\pm 0.03$ $22\pm 13$ Fe XXIV 11.03 $\rm 1s^2~3d~^2D_{3/2} \rightarrow 1s^2~2p~^2P_{1/2}$ 7.3
      Fe XXIII 11.02 $\rm 1s^2~2s~3p~^3P_1 \rightarrow 1s^2~2s^2~^1S_0$ 7.2
  $11.13\pm 0.03$ $21\pm 13$ Fe XVII 11.13 $\rm 2s^2~2p^5~(^2P)~5d~^1P_1 \rightarrow 2s^2~2p^6~^1S_0$ 6.8
  $11.36\pm 0.02$ $28\pm 13$ Fe XVIII 11.33 $\rm 2s^2~2p^4~(^1D)~4d~^2D_{5/2} \rightarrow 2s^2~2p^5~^2P_{3/2}$ 6.9
      Fe XVIII 11.33 $\rm 2s^2~2p^4~(^1D)~4d~^2P_{3/2} \rightarrow 2s^2~2p^5~^2P_{3/2}$ 6.9
      Fe XVIII 11.33 $\rm 2s^2~2p^4~(^1D)~4d~^2S_{1/2} \rightarrow 2s^2~2p^5~^2P_{3/2}$ 6.9
      Fe XXIII 11.34 $\rm 1s^2~2s~3d~^3D_2 \rightarrow 1s^2~2s~2p~^3P_1$ 7.2
      Ni XXI 11.32 $\rm 2s^2~2p^3~(^2D)~3d~^3D_3 \rightarrow 2s^2~2p^4~^3P_2$ 7.0
  $11.46\pm 0.02$ $25\pm 13$ Fe XXIV 11.43 $\rm 1s^2~3s~^2S_{1/2} \rightarrow 1s^2~2p~^2P_{3/2}$ 7.3
      Fe XXII 11.49 $\rm 1s^2~2s~2p_{1/2}~3p_{3/2} \rightarrow 1s^2~2s^2~2p~^2P_{1/2}$ 7.1
      Fe XXIII 11.46 $\rm 1s^2~2s~3d~^3D_3 \rightarrow 1s^2~2s~2p~^3P_2$ 7.2
* $11.75\pm 0.02$ $40\pm 13$ Fe XXIII 11.74 $\rm 1s^2~2s~3d~^1D_2 \rightarrow 1s^2~2s~2p~^1P_1$ 7.2
      Fe XXII 11.77 $\rm 1s^2~2s^2~3d~^2D_{3/2} \rightarrow 1s^2~2s^2~2p~^2P_{1/2}$ 7.1
  $11.94\pm 0.03$ $19\pm 12$ Fe XXII 11.98 $\rm 1s^2~2s^2~3d~^2D_{3/2} \rightarrow 1s^2~2s^2~2p~^2P_{3/2}$ 7.1
      Fe XXI 11.98 $\rm 1s^2~2s~2p_{1/2}^2~3p_{3/2} \rightarrow 1s^2~2s^2~2p^2~^3P_0$ 7.0
      Fe XXII 11.93 $\rm 1s^2~2s^2~3d~^2D_{5/2} \rightarrow 1s^2~2s^2~2p~^2P_{3/2}$ 7.1
      Fe XXI 11.95 $\rm 1s^2~2s~2p_{1/2}~2p_{3/2}~3p_{3/2} \rightarrow 1s^2~2s^2~2p^2~^3P_0$ 7.0
* $12.16\pm 0.01$ $100\pm 17$ Ne X 12.13 $\rm 2p~^2P_{3/2} \rightarrow 1s~^2S_{1/2}$ 6.8
      Ne X 12.14 $\rm 2p~^2P_{1/2} \rightarrow 1s~^2S_{1/2}$ 6.8
      Fe XVII 12.12 $\rm 2s^2~2p^5~(^2P)~4d~^1P_1 \rightarrow 2s^2~2p^6~^1S_0$ 6.8
      Fe XXIII 12.16 $\rm 1s^2~2s~3s~^1S_0 \rightarrow 1s^2~2s~2p~^1P_1$ 7.2
* $12.31\pm 0.01$ $54\pm 15$ Fe XXI 12.28 $\rm 1s^2~2s^2~2p~3d~^3D_1 \rightarrow 1s^2~2s^2~2p^2~^3P_0$ 7.0
  $12.68\pm 0.02$ $26\pm 13$ Fe XXI 12.65 $\rm 1s^2~2s~2p_{1/2}~2p_{3/2}~3d_{5/2} \rightarrow 1s^2~2s~2p^3~^3S_1$ 7.0
      Ni XIX 12.66 $\rm 2s^2~2p^5~(^2P)~3d~^3D_1 \rightarrow 2s^2~2p^6~^1S_0$ 6.9
      Fe XVII 12.70 $\rm 2s^2~2p^5~(^2P)~4s~^3P_1 \rightarrow 2s^2~2p^6~^1S_0$ 6.8
      Fe XXII 12.63 $\rm 1s^2~2s~2p_{1/2}~3d_{5/2} \rightarrow 1s^2~2s~2p^2~^2P_{3/2}$ 7.1
* $12.80\pm 0.02$ $36\pm 13$ Fe XX 12.82 $\rm 1s^2~2s^2~2p_{1/2}~2p_{3/2}~3d_{3/2} \rightarrow 2s^2~2p^3~^4S_{3/2}$ 7.0
      Fe XXII 12.75 $\rm 1s^2~2s~2p_{1/2}~3s \rightarrow 1s^2~2s~2p^2~^2D_{3/2}$ 7.1
      Fe XXI 12.82 $\rm 1s^2~2s~2p_{1/2}~2p_{3/2}~3d_{5/2} \rightarrow 1s^2~2s~2p^3~^3D_1$ 7.0
  $12.95\pm 0.01$ $46\pm 13$ Fe XX 12.97 $\rm 1s^2~2s^2~2p_{1/2}~2p_{3/2}~3d_{3/2} \rightarrow 2s^2~2p^3~^4S_{3/2}$ 7.0
      Fe XX 12.91 $\rm 1s^2~2s^2~2p_{1/2}~2p_{3/2}~3d_{5/2} \rightarrow 2s^2~2p^3~^4S_{3/2}$ 7.0
      Fe XXII 12.95 $\rm 1s^2~2s~2p_{1/2}~3s \rightarrow 1s^2~2s~2p^2~^2S_{1/2}$ 7.1
      Fe XIX 12.93 $\rm 1s^2~2s~2p_{1/2}~2p_{3/2}^3~3p_{3/2} \rightarrow 2s^2~2p^4~^3P_2$ 6.9
  $13.25\pm 0.02$ $25\pm 12$ Fe XXI 13.25 $\rm 1s^2~2s^2~2p_{1/2}~3s \rightarrow 1s^2~2s^2~2p^2~^3P_2$ 7.0
      Fe XXII 13.24 $\rm 1s^2~2s^2~3p~^2P_{1/2} \rightarrow 1s^2~2s~2p^2~^2D_{3/2}$ 7.1
      Fe XX 13.27 $\rm 1s^2~2s^2~2p_{1/2}~2p_{3/2}~3d_{3/2} \rightarrow 2s^2~2p^3~^2P_{1/2}$ 7.0
      Fe XX 13.27 $\rm 1s^2~2s^2~2p_{1/2}~2p_{3/2}~3d_{5/2} \rightarrow 2s^2~2p^3~^2P_{1/2}$ 7.0
      Fe XIX 13.27 $\rm 2s^2~2p^3~(^2P)~3d~^3D_3 \rightarrow 2s^2~2p^4~^3P_2$ 6.9
  $13.34\pm 0.03$ $18\pm 12$ Fe XX 13.35 $\rm 1s^2~2s^2~2p_{1/2}^2~3d_{3/2} \rightarrow 2s^2~2p^3~^2D_{3/2}$ 7.0
      Fe XX 13.39 $\rm 2s~2p^3~(^5S)~3d~^4D_{7/2} \rightarrow 2s~2p^4~^4P_{5/2}$ 6.9
      Fe XVIII 13.32 $\rm 2s~2p^5~(^3P)~3p~^4P_{5/2} \rightarrow 2s^2~2p^5~^2P_{3/2}$ 6.9
      Fe XVIII 13.36 $\rm 2s~2p^5~(^3P)~3p~^2P_{3/2} \rightarrow 2s^2~2p^5~^2P_{3/2}$ 6.9
* $13.47\pm 0.03$ $21\pm 13$ Ne IX 13.45 $\rm 1s~2p~^1P_1 \rightarrow 1s^2~^1S_0$ 6.6
      Fe XIX 13.46 $\rm 2s^2~2p^3~(^2D)~3d~^3S_1 \rightarrow 2s^2~2p^4~^3P_2$ 6.9
      Fe XIX 13.42 $\rm 2s^2~2p^3~(^2D)~3d~^1F_3 \rightarrow 2s^2~2p^4~^3P_2$ 6.9
* $13.52\pm 0.02$ $35\pm 14$ Fe XIX 13.52 $\rm 2s^2~2p^3~(^2D)~3d~^3D_3 \rightarrow 2s^2~2p^4~^3P_2$ 6.9
      Fe XXI 13.51 $\rm 1s^2~2s~2p_{1/2}^2~3s \rightarrow 1s^2~2s~2p^3~^3D_1$ 7.0
      Fe XIX 13.50 $\rm 1s^2~2s^2~2p_{1/2}~2p_{3/2}^2~3d_{3/2} \rightarrow 2s^2~2p^4~^3P_2$ 6.9
  $13.69\pm 0.02$ $30\pm 14$ Ne IX 13.70 $\rm 1s~2s~^3S_1 \rightarrow 1s^2~^1S_0$ 6.6
      Fe XIX 13.65 $\rm 2s^2~2p^3~(^2D)~3d~^3F_3 \rightarrow 2s^2~2p^4~^3P_2$ 6.9
      Fe XIX 13.73 $\rm 1s^2~2s^2~2p_{1/2}~2p_{3/2}^2~3d_{5/2} \rightarrow 2s^2~2p^4~^3P_1$ 6.9
      Fe XIX 13.68 $\rm 1s^2~2s^2~2p_{1/2}~2p_{3/2}^2~3d_{3/2} \rightarrow 2s^2~2p^4~^3P_1$ 6.9
  $13.81\pm 0.01$ $52\pm 14$ Fe XIX 13.80 $\rm 1s^2~2s^2~2p_{1/2}~2p_{3/2}^2~3d_{5/2} \rightarrow 2s^2~2p^4~^3P_2$ 6.9
      Fe XVII 13.82 $\rm 2s~2p^6~3p~^1P_1 \rightarrow 2s^2~2p^6~^1S_0$ 6.8
      Fe XIX 13.76 $\rm 2s^2~2p^3~(^2D)~3d~^3S_1 \rightarrow 2s^2~2p^4~^1D_2$ 6.9
      Fe XX 13.77 $\rm 2s^2~2p^2~(^3P)~3s~^4P_{5/2} \rightarrow 2s^2~2p^3~^4S_{3/2}$ 7.0
      Ni XIX 13.78 $\rm 2s^2~2p^5~(^2P)~3s~^1P_1 \rightarrow 2s^2~2p^6~^1S_0$ 6.8
  $13.98\pm 0.02$ $40\pm 14$ Fe XX 13.96 $\rm 2s^2~2p^2~(^3P)~3s~^4P_{1/2} \rightarrow 2s^2~2p^3~^4S_{3/2}$ 7.0
      Fe XVIII 13.95 $\rm 2s^2~2p^4~(^1S)~3d~^2D_{5/2} \rightarrow 2s^2~2p^5~^2P_{3/2}$ 6.9
      Fe XIX 13.95 $\rm 1s^2~2s^2~2p_{1/2}^2~2p_{3/2}~3d_{3/2} \rightarrow 2s^2~2p^4~^3P_2$ 6.9
      Fe XIX 13.96 $\rm 1s^2~2s^2~2p_{1/2}^2~2p_{3/2}~3d_{3/2} \rightarrow 2s^2~2p^4~^3P_2$ 6.9
  $14.05\pm 0.01$ $51\pm 15$ Fe XXI 14.01 $\rm 1s^2~2s^2~2p_{1/2}~3p_{1/2} \rightarrow 1s^2~2s~2p^3~^3D_1$ 7.0
      Ni XIX 14.04 $\rm 2s^2~2p^5~(^2P)~3s~^3P_1 \rightarrow 2s^2~2p^6~^1S_0$ 6.8
      Ni XIX 14.08 $\rm 2s^2~2p^5~(^2P)~3s~^3P_2 \rightarrow 2s^2~2p^6~^1S_0$ 6.8
      Fe XIX 14.07 $\rm 1s^2~2s~2p_{1/2}^2~2p_{3/2}^2~3d_{3/2} \rightarrow 2s~2p^5~^3P_2$ 6.9
* $14.22\pm 0.01$ $92\pm 17$ Fe XVIII 14.21 $\rm 1s^2~2s^2~2p_{1/2}~2p_{3/2}^3~3d_{5/2} \rightarrow 2s^2~2p^5~^2P_{3/2}$ 6.9
      Fe XVIII 14.21 $\rm 2s^2~2p^4~(^1D)~3d~^2D_{5/2} \rightarrow 2s^2~2p^5~^2P_{3/2}$ 6.9
      Fe XX 14.27 $\rm 1s^2~2s~2p_{1/2}^2~2p_{3/2}~3s \rightarrow 2s~2p^4~^4P_{5/2}$ 7.0
      Fe XVIII 14.26 $\rm 2s^2~2p^4~(^1D)~3d~^2S_{1/2} \rightarrow 2s^2~2p^5~^2P_{3/2}$ 6.9
  $14.35\pm 0.02$ $42\pm 15$ Fe XVIII 14.34 $\rm 2s^2~2p^4~(^1D)~3d~^2P_{1/2} \rightarrow 2s^2~2p^5~^2P_{1/2}$ 6.9
      Fe XVIII 14.34 $\rm 2s^2~2p^4~(^1D)~3d~^2D_{3/2} \rightarrow 2s^2~2p^5~^2P_{1/2}$ 6.9
      Fe XX 14.33 $\rm 1s^2~2s^2~2p_{3/2}^2~3p_{3/2} \rightarrow 2s~2p^4~^4P_{5/2}$ 7.0
  $14.42\pm 0.02$ $26\pm 14$ Fe XVIII 14.37 $\rm 2s^2~2p^4~(^3P)~3d~^2D_{5/2} \rightarrow 2s^2~2p^5~^2P_{3/2}$ 6.9
      Fe XX 14.42 $\rm 1s^2~2s~2p_{1/2}^2~2p_{3/2}~3s \rightarrow 2s~2p^4~^4P_{3/2}$ 7.0
      Fe XVIII 14.43 $\rm 1s^2~2s^2~2p_{1/2}~2p_{3/2}^3~3d_{5/2} \rightarrow 2s^2~2p^5~^2P_{1/2}$ 6.9
  $14.53\pm 0.02$ $39\pm 14$ Fe XVIII 14.53 $\rm 2s^2~2p^4~(^3P)~3d~^2F_{5/2} \rightarrow 2s^2~2p^5~^2P_{3/2}$ 6.9
      Fe XVIII 14.57 $\rm 2s^2~2p^4~(^3P)~3d~^4P_{3/2} \rightarrow 2s^2~2p^5~^2P_{3/2}$ 6.9
      Fe XVIII 14.51 $\rm 1s^2~2s^2~2p_{1/2}^2~2p_{3/2}^2~3d_{3/2} \rightarrow 2s^2~2p^5~^2P_{3/2}$ 6.8
  $14.64\pm 0.02$ $36\pm 14$ Fe XIX 14.66 $\rm 2s^2~2p^3~(^2D)~3s~^3D_3 \rightarrow 2s^2~2p^4~^3P_2$ 6.9
      Fe XVIII 14.62 $\rm 2s^2~2p^4~(^3P)~3d~^2P_{3/2} \rightarrow 2s^2~2p^5~^2P_{1/2}$ 6.8
* $14.93\pm 0.02$ $26\pm 15$ Fe XIX 14.96 $\rm 2s^2~2p^3~(^4S)~3s~^3S_1 \rightarrow 2s^2~2p^4~^3P_2$ 6.9
      Fe XX 14.92 $\rm 1s^2~2s^2~2p_{1/2}~2p_{3/2}~3p_{3/2} \rightarrow 2s~2p^4~^4P_{3/2}$ 7.0
      Fe XX 14.97 $\rm 1s^2~2s^2~2p_{1/2}~2p_{3/2}~3p_{3/2} \rightarrow 2s~2p^4~^4P_{1/2}$ 7.0
      Fe XX 14.95 $\rm 1s^2~2s^2~2p_{1/2}~2p_{3/2}~3p_{1/2} \rightarrow 2s~2p^4~^4P_{5/2}$ 7.0
* $15.03\pm 0.01$ $152\pm 19$ Fe XVII 15.01 $\rm 2s^2~2p^5~(^2P)~3d~^1P_1 \rightarrow 2s^2~2p^6~^1S_0$ 6.7
      Fe XIX 15.08 $\rm 2s^2~2p^3~(^4S)~3s~^5S_2 \rightarrow 2s^2~2p^4~^3P_2$ 6.9
* $15.20\pm 0.01$ $32\pm 14$ Fe XIX 15.20 $\rm 1s^2~2s~2p_{1/2}^2~2p_{3/2}^2~3s \rightarrow 2s~2p^5~^3P_2$ 6.9
      O VIII 15.18 $\rm 4p~^2P_{1/2} \rightarrow 1s~^2S_{1/2}$ 6.5
      O VIII 15.18 $\rm 4p~^2P_{3/2} \rightarrow 1s~^2S_{1/2}$ 6.5
  $15.28\pm 0.01$ $40\pm 14$ Fe XVII 15.26 $\rm 2s^2~2p^5~(^2P)~3d~^3D_1 \rightarrow 2s^2~2p^6~^1S_0$ 6.7
  $15.45\pm 0.01$ $35\pm 13$ Fe XVII 15.45 $\rm 2s^2~2p^5~(^2P)~3d~^3P_1 \rightarrow 2s^2~2p^6~^1S_0$ 6.7
      Fe XIX 15.47 $\rm 1s^2~2s~2p_{1/2}^2~2p_{3/2}^2~3s \rightarrow 2s~2p^5~^3P_2$ 6.9
* $15.61\pm 0.02$ $26\pm 12$ Fe XVIII 15.62 $\rm 2s^2~2p^4~(^1D)~3s~^2D_{5/2} \rightarrow 2s^2~2p^5~^2P_{3/2}$ 6.8
* $16.02\pm 0.01$ $56\pm 15$ O VIII 16.01 $\rm 3p~^2P_{1/2} \rightarrow 1s~^2S_{1/2}$ 6.5
      O VIII 16.01 $\rm 3p~^2P_{3/2} \rightarrow 1s~^2S_{1/2}$ 6.5
      Fe XVIII 16.00 $\rm 2s^2~2p^4~(^3P)~3s~^2P_{3/2} \rightarrow 2s^2~2p^5~^2P_{3/2}$ 6.8
* $16.10\pm 0.02$ $44\pm 14$ Fe XVIII 16.07 $\rm 2s^2~2p^4~(^3P)~3s~^4P_{5/2} \rightarrow 2s^2~2p^5~^2P_{3/2}$ 6.8
      Fe XIX 16.11 $\rm 21s^2~2s^2~2p_{1/2}~2p_{3/2}^2~3p_{1/2} \rightarrow 2s~2p^5~^3P_2$ 6.9
  $16.33\pm 0.02$ $22\pm 11$ Fe XVIII 16.32 $\rm 2s~2p^5~3s~^2P_{3/2} \rightarrow 2s~2p^6~^2S_{1/2}$ 6.8
      Fe XVII 16.35 $\rm 2s^2~2p^5~(^2P)~3p~^3D_2 \rightarrow 2s^2~2p^6~^1S_0$ 6.7
      Fe XIX 16.34 $\rm 1s^2~2s^2~2p_{1/2}~2p_{3/2}^2~3p_{1/2} \rightarrow 2s~2p^5~^3P_2$ 6.9
* $16.78\pm 0.01$ $60\pm 13$ Fe XVII 16.78 $\rm 2s^2~2p^5~(^2P)~3s~^1P_1 \rightarrow 2s^2~2p^6~^1S_0$ 6.7
* $17.06\pm 0.01$ $73\pm 14$ Fe XVII 17.05 $\rm 2s^2~2p^5~(^2P)~3s~^3P_1 \rightarrow 2s^2~2p^6~^1S_0$ 6.7
      Fe XVII 17.10 $\rm 2s^2~2p^5~(^2P)~3s~^3P_2 \rightarrow 2s^2~2p^6~^1S_0$ 6.7
* $18.99\pm 0.01$ $66\pm 14$ O VIII 18.97 $\rm 2p~^2P_{1/2} \rightarrow 1s~^2S_{1/2}$ 6.5
      O VIII 18.97 $\rm 2p~^2P_{3/2} \rightarrow 1s~^2S_{1/2}$ 6.5

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