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Table 7
Average rms difference in flux for the normalized spectra of the same star but observed by different instruments.
| Star | All | H-α | H-β | Mg triplet |
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| α Cen A | 0.012 | 0.009 | 0.008 | 0.004 |
| α Cet | 0.021 | 0.015 | 0.026 | 0.018 |
| α Tau | 0.014 | 0.010 | 0.015 | 0.013 |
| β Hyi | 0.009 | 0.009 | 0.008 | 0.003 |
| β Vir | 0.007 | 0.007 | 0.006 | 0.005 |
| δ Eri | 0.008 | 0.006 | 0.010 | 0.007 |
| ϵ Eri | 0.015 | 0.015 | 0.008 | 0.007 |
| ϵ Vir | 0.006 | 0.005 | 0.006 | 0.006 |
| η Boo | 0.005 | 0.005 | 0.005 | 0.004 |
| μ Ara | 0.012 | 0.014 | 0.011 | 0.008 |
| τ Cet | 0.007 | 0.008 | 0.007 | 0.005 |
| 18 Sco | 0.007 | 0.009 | 0.007 | 0.007 |
| Arcturus | 0.010 | 0.010 | 0.012 | 0.015 |
| HD 107328 | 0.006 | 0.008 | 0.008 | 0.009 |
| HD 122563 | 0.008 | 0.007 | 0.007 | 0.004 |
| HD 140283 | 0.009 | 0.006 | 0.006 | 0.004 |
| HD 220009 | 0.006 | 0.005 | 0.007 | 0.007 |
| HD 22879 | 0.007 | 0.006 | 0.007 | 0.005 |
| HD 84937 | 0.007 | 0.005 | 0.009 | 0.005 |
| Procyon | 0.013 | 0.008 | 0.008 | 0.005 |
| Sun | 0.008 | 0.004 | 0.008 | 0.005 |
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| Mean | 0.009 | 0.008 | 0.009 | 0.007 |
| StdDev | 0.004 | 0.003 | 0.004 | 0.004 |
Notes. Apart from the whole wavelength range (All), three individual regions are also reported: H-α (653–660 nm), H-β (483–489 nm), and Mg triplet (515–520 nm).
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