Table 6
Comparison of the 
-index for solar-like MWO-calibrator stars.
| Object | Spectral type | -index |
Spec | Residuals | |
| MWO | HERMES | - |
|||
|
|
|||||
| HD66171 | G2V | 0.188 ± 0.012 | 0.0083 | 1 | 0.003 |
| HD88737 | F9V | 0.233 ± 0.006 | 0.0102 | 1 | 0.002 |
| HD114710 | F9.5V | 0.200 ± 0.005 | 0.0088 ± 0.0001 | 2 | 0.002 |
| HD115383 | G0V | 0.313 ± 0.014 | 0.0136 ± 0.0001 | 3 | 0.000 |
| HD115043 | G2V | 0.317 ± 0.027 | 0.0138 ± 0.0001 | 2 | 0.000 |
| HD120136 | F6IV | 0.188 ± 0.005 | 0.0082 ± 0.0003 | 6 | 0.001 |
| HD146233 ⋆ | G2Va | 0.174 ± 0.010 | 0.0078 ± 0.0029 | 12 | 0.006 |
| HD190771 | G2V | 0.334 ± 0.028 | 0.0148 | 1 | 0.006 |
Notes. The identifier, spectral type, and the total number of observations of the calibrator stars in the HERMES archive are given. The -index was calculated from the combined median HERMES data spectrum, following the procedure described in Sect. 3. The values reported for the Mount Wilson Observations (MWO) was calculated from the mean and standard deviation of all tabulated observations by Duncan et al. (1991). The error bars for the HERMES observations are calculated from the dispersion between the calculated for individual spectra. The residual between MWO and HERMES are given.
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