Table C.9
Columns in the DR4 SPHINX stellar parameters VAC. Each reported parameter corresponds to the average of the ANN sub-unit estimates, weighted by the validation scores. The reported errors correspond to the error propagation between the scatter among the individual ANN sub-units and the standard deviation of the spectroscopic residuals of the validation stars. For the effective temperature, we computed a residual of 120 K for the SEGUE DR12 adopted values. The cases when SPHINX does not provide an estimate for the parameter are represented as −9999.
| Column | Description |
|---|---|
| ID | Identifier of the object in the dual photometry catalogue |
| RA | Right ascension [degrees] |
| DEC | Declination [degrees] |
| NET_FEH | Metallicity |
| NET_FEH_ERR | Metallicity uncertainty |
| NET_ARRAY_FEH_FLAG | Number of ANN sub-units used in the metallicity estimation |
| NET_AC | Absolute carbon abundance |
| NET_AC_ERR | Absolute carbon abundance uncertainty |
| NET_ARRAY_AC_FLAG | Number of ANN sub-units used in the absolute carbon abundance estimation |
| NET_TEFF | Effective temperature [K] |
| NET_TEFF_ERR | Effective temperature uncertainty [K] |
| NET_ARRAY_TEFF_FLAG | Number of ANN sub-units used in the effective temperature estimation |
| NET_OVERLAP_FLAG | 0 = based on the architecture of only one temperature regime; 1 = [Fe/H] and A(C) values are the averages between the measurements from the two temperature regimes |
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