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Table 2.
Properties of observed spectral lines.
| Instrument | Wavelength [Å] | Line/band | log T [K] | Atmospheric regime |
|---|---|---|---|---|
| 2796 | Mg II k | 3.6 – 3.9 | Chromosphere | |
| IRIS | 2803 | Mg II h | 3.6 – 3.9 | Chromosphere |
| Mg II k -peak | 3.9 | Upper chromosphere | ||
| MSDP | Hα | 3.9 | Upper chromosphere | |
| 304 | He II | 4.7 | Upper chromosphere, TR | |
| SDO/AIA | 171 | Fe IX | 5.9 | Upper TR |
| 193 | Fe XII, Fe XXIV | 6.1 – 7.3 | Corona | |
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