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Table 2
Description of the columns in the table of HARPS stellar parameters delivered to ESO.
| Keyword | Definition | Value range | Null value | Determination |
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| DP_ID | ESO dataset identifier | – | – | FITS file header. |
| OBJECT | Object designation as read in ORIGFILE | – | – | FITS file header. |
| TARG_NAME | Target designation as read in ORIGFILE | – | – | FITS file header. |
| RAJ2000 | Telescope pointing (right ascension, J2000) | – | – | Units = deg. FITS file header. |
| DEJ2000 | Telescope pointing (declination, J2000) | – | – | Units = deg. FITS file header. |
| MJD_OBS | Start of observation date | – | – | Units = Julian day. FITS file header. |
| EXPTIME | Total integration time | – | – | Units = sec. FITS file header. |
| S/N | Signal-to-noise ratio as estimated by the pipeline | (10, ∞) | NaN | Internal routine. |
| VRAD | Stellar radial velocity | [− 500, 500] | NaN | Units = km s-1. |
| ERR_VRAD | Error on the radial velocity | (0, ∞) | NaN | Units = km s-1. FITS file header/AMBRE radial velocity calculation routine. |
| VRAD_CCF_FWHM | FWHM of the CCF between the spectrum and the binary mask | (0, ∞) | NaN | FITS file header/AMBRE radial velocity calculation routine. |
| VRAD_FLAG | Quality flag on the radial velocity analysis | 0, 1, 2, 3, 4, 5 | NaN | 0 = Excellet determination ... 5 = Poor determination, when Vrad determined by AMBRE pipeline. NaN when Vrad determined by HARPS pipeline. |
| TEFF | Stellar effective temperature (Teff) as estimated by the pipeline | [4000, 7625] | NaN | Units = K. Null value used if Teff outside accepted parameter limits. |
| ERR_INT_TEFF | Effective temperature internal error | [10, 100] | NaN | Units = K. Defined as function of S/N, it is equal to the 0.7 quantile to the bin to which the S/N value belongs to; see Fig. 6 and Sect. 3. |
| ERR_EXT_TEFF | Effective temperature external error | 93 | NaN | Units = K. Defined using the Porto sample; see Sect. 4.3. |
| LOG_G | Stellar surface gravity (log g) as estimated by the pipeline | [0, 5.0] | NaN | Units = dex. Null value used if log g outside accepted parameter limits. |
| ERR_INT_LOG_G | Surface gravity internal error | [0.02, 0.184] | NaN | Units = dex. See ERR_INT_TEFF for definition. |
| ERR_EXT_LOG_G | Surface gravity external error | 0.26 | NaN | Units = dex. See ERR_EXT_TEFF for definition. |
| M_H | Mean metallicity [M/H] as estimated by the pipeline | [− 3.5, 1] | NaN | Units = dex. Null value used if [M/H] outside accepted parameter limits. |
| ERR_INT_M_H | Mean metallicity internal error | [0.01, 0.07] | NaN | Units = dex. See ERR_INT_TEFF for definition. |
| ERR_EXT_M_H | Mean metallicity external error | 0.08 | NaN | Units = dex. See ERR_EXT_TEFF for definition. |
| ALPHA | α-elements over iron enrichment ([α/Fe]) as estimated by the pipeline | [− 0.4, 0.8] | NaN | Units = dex. Null value used if [α/Fe] outside accepted parameter limits. |
| ERR_INT_ALPHA | α-elements over iron enrichment internal error | [0.005, 0.048] | NaN | Units = dex. See ERR_INT_TEFF for definition. |
| ERR_EXT_ALPHA | α-elements over iron enrichment external error | 0.04 | NaN | Units = dex. See ERR_EXT_TEFF for definition. |
| CHI2 | log (χ2)of the fit between the observed and reconstructed synthetic spectrum at the MATISSE parameters | [− 5, ∞) | NaN | Goodness of fit between final normalised and final reconstructed spectra. |
| CHI2_FLAG | Quality flag on the fit between the observed and reconstructed synthetic spectrum at the MATISSE parameters | 0, 1, 2 | NaN | 0 = Very good fit, 1 = Good fit, 2 = Poor fit |
| ORIGFILE | ESO file name of the original spectrum being analysed | – | – | |
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