Table 4
BestNeighbour output table content.
| Field name | Short description |
|---|---|
| SourceId | Gaia source identifier |
| OriginalExtSourceId | Original External Catalogue source identifier |
| AngularDistance | Haversine angular distance (arcsec) |
| NumberOfMatesa | Number of mates in Gaia catalogue |
| NumberOfNeighbours | Number of good neighbours in the second catalogue |
| BestNeighbourMultiplicitya | Number of neighbours with same probability as best neighbourb |
| GaiaAstrometricParams | Number of Gaia astrometric |
| parameters used |
Notes. (a) Column available only for dense surveys. See Sects. 2 and 3. (b) Two neighbours with the same probability are normally sources with different identifiers, but exactly the same coordinates and coordinate errors. The cross-match algorithm is thus unable to distinguish them, and either can be selected as bestNeighbour.
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