Table 2.
Settings and spot numbers for all six atlases used in this study.
| Atlas | λ-range [Å] | Spot Nr |
|---|---|---|
| QS | 3900 – 6830 | 0 |
| MA | 3900 – 6830 | 67 |
| IAG23 | 4200 – 8000 | 0 |
| HRS23 | 5 – 30000 | - |
| PEPSI | 3830 – 9140 | 27 |
| IAG16 | 4050 – 10650 | 117 |
| 10 000 – 23000 | 124 | |
| LFC13 | 4750 – 5860 | 24 |
| KPW11 | 2950 – 3250 | 153 |
| 3250 – 4010 | 194 | |
| 4010 – 5710 | 172 | |
| 5710 – 9250 | 197 | |
| KPN87 | 2960 – 4020 | 153 |
| 3330 – 3783 | 126 | |
| 4020 – 4738 | 159 | |
| 4738 – 5765 | 181 | |
| 5765 – 9997 | 206 | |
| 9997 – 13000 | 258 | |
Notes. Δλ is the wavelength range of the atlases. SILSO World Data Center (1980-2019) was used to obtain the spot numbers (Spot Nr). The spot numbers listed are averages per scan per observing day. Links to observation dates are provided in the subsections for each atlas.
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