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Reported Effective Energy Levels in Various Studies
| Effective Energy Level (keV) | Studies |
|---|---|
| 22.1 | Anderson et al., 1996; Wong et al., 2004 |
| 40 | Dowker et al., 2003; Willmott et al., 2007 |
| 26.6 | Schweizer et al., 2007 |
| 24 | Mulder et al., 2004 |
| 31 | Mulder et al., 2004 |
| 60 | Huang et al., 2007 |
