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Table 1.
Transitions considered in this work and corresponding energy band selected to extract photon lists and to create the corresponding images.
| Brightest | Transition | Theoretical | Image energy |
|---|---|---|---|
| line | levels | energy [eV] | range [eV] |
| O VII | 7 → 1 | 574 | 534–614 |
| O VIII | 4, 3 → 1 | 654, 653 | 614–694 |
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