Table 1
Hermes RV standard stars.
| Star | SpType | FWHM (km s−1) | HER rv (km s−1) | HER err (km s−1) | HER18 rv (km s−1) | HER18 err (km s−1) | HER–HER18 (km s−1) | Comb. err (km s−1) |
|---|---|---|---|---|---|---|---|---|
| HD 154417(†) | F8.5IV | 10.883 | −16.729 | 0.009 | −16.668 | 0.005 | −0.061 | 0.011 |
| HD 168009(†) | G1V | 8.370 | −64.570 | 0.002 | −64.509 | 0.004 | −0.061 | 0.005 |
| HD 32923 | G4V | 7.982 | 20.623 | 0.005 | 20.747 | 0.004 | −0.125 | 0.007 |
| HD 197076 | G5V | 8.178 | −35.417 | 0.005 | −35.321 | 0.004 | −0.097 | 0.006 |
| HD 42807(†) | G5V | 9.412 | 6.067 | 0.003 | 6.148 | 0.006 | −0.080 | 0.006 |
| HD 141105 | G8V | 8.225 | 1.876 | 0.003 | 1.957 | 0.003 | −0.081 | 0.004 |
| HD 144579 | G8V | 7.532 | −59.445 | 0.003 | −59.372 | 0.002 | −0.074 | 0.004 |
| HD 10780 | K0V | 8.243 | 2.810 | 0.007 | 2.841 | 0.004 | −0.031 | 0.008 |
| HD 221354 | K0V | 8.284 | −25.107 | 0.002 | −25.049 | 0.002 | −0.058 | 0.003 |
| HD65583 | K0V | 7.523 | 14.810 | 0.037 | 14.886 | 0.006 | −0.076 | 0.038 |
| HD 82106 | K3V | 9.868 | 29.803 | 0.007 | 29.880 | 0.003 | −0.076 | 0.008 |
| weighted average difference HER–HER 18 (km s−1): | −0.075 | 0.007 | ||||||
Notes. Spectral types from SIMBAD. HER and HER18 denote Hermes RVs before and after the upgrade of the optical fiber on 25 April 2018, respectively. Columns labeled ‘rv’ and ‘err’ refer to straight means and standard errors on the mean, respectively. The last two columns show the difference before minus after the upgrade and the square summed mean errors. Low-amplitude spectroscopic binaries exhibiting orbital signals have been marked with a(†). NB: These offsets have not yet been applied to VELOCE data.
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