Table 2
Details of soft emission lines between 0.5 keV and 4 keV.
| Line | Detected energy from previous work (keV) | Reference energy (keV) | Identified energy for this work (keV) |
|---|---|---|---|
| Ο VIII Lyα |  |
0.6541(c) |  |
| Ne IX (f, i, r) | 0.90460 ± 0.00033/0.91454 ± 0.00034/0.92154 ± 0.00034(b) | 0.905/0.915/0.922(c) |  |
| Ne X Lyα |  |
1.02196(d) | 1.02130 (fixed) |
| Mg XI (f, i, r) |  |
1.3311/1.3431/1.3522(c) |  |
| Mg XII Lyα | 1.4720 ± 0.0002(b) | 1.4723(d) | 1.4720 (fixed) |
| Si XIII (f, i, r) | 1.8388 ± 0.0002/1.8536 ± 0.0002/1.8643 ± 0.0002(b) | 1.8382/1.8530/1.8648(e) |  |
| Si XIV Lyα | 2.0049 ± 0.0003(b) | 2.0056(f) | 2.0049 (fixed) |
| S XV (f, i, r) |  |
2.4291/2.4463/2.4606(e) |  |
| S XVI Lyα |  |
2.6196(f) | 2.6207 (fixed) |
| Ar VI–IX |  |
2.9619−2.9675(h) | 2.9661 (fixed) |
| S XV RRC? | 3.224(c) |  |
|
| Ca II–XII Κα |  |
3.6911−3.7110(h) |  |
Notes. To convert from Å in previous works to keV, we compute 
where hc = 12.39842 (with values for h, c and e from CODATA 2018, Tiesinga et al. 2021) and round to relevant significant digits, (f, i, r): referring to forbidden, intercombination, and resonance lines respectively, (fixed): to previous detected energies.
References. (a)Lomaeva et al. (2020), (b)Amato et al. (2021), (c)Drake (1988), (d)Erickson (1977), (e)Hell et al. (2016), (f)Garcia & Mack (1965), (g)Schulz et al. (2002), (h)House (1969), (i)Watanabe et al. (2006).
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