Table 1.
Performance metrics for the traditional selection methods.
| Method | Purity | ϵA | ϵI | vlos | [Fe/H] |
|---|---|---|---|---|---|
| V selection | 9.6% | 86.0% | 4.5% | ✓ | |
| VM selection | 30.5% | 86.2% | 1.1% | ✓ | ✓ |
| ZM selection | 50.9% | 2.4% | 0.02% | ✓ |
Notes. The middle columns come from the truth-level information of the m12i LSR0 catalog with δϖ/ϖ ≤ 0.10. The V and VM selections require a measurement of the radial velocity, denoted as vlos. The purity of a selection is the fraction of selected stars with accreted truth labels. The accreted efficiency (ϵA) is the fraction of accreted stars in the sample that get selected and the in situ efficiency (ϵA) is the faction of in situ stars selected, making 
the background rejection factor. The right columns show the measurements primarily responsible for limiting available statistics, but which are required to use the method.
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