Rave DR6 best neighbour (gaiadr3.ravedr6_best_neighbour)
The table has 450597 rows, 6 columns.
Table Ravedr6BestNeighbour lists each matched external catalogue object with its best neighbour in Gaia. The cross-match algorithm is not symmetric and searches RAVE DR6 sources counterparts in Gaia. The best neighbour is chosen among good neighbours as the one with the highest value of the figure of merit, which evaluates the ratio between two opposite models/hypotheses: the counterpart candidate is a match or it is found by chance. Good neighbours are nearby objects in Gaia whose position is compatible within position errors with the external catalogue target. The cross-match algorithm is positional and exploits the full~5 parameter covariance matrix of the Gaia astrometric solution when available and the external catalogue positions and position errors. In addition it takes into account the Gaia environment using the local density.Please note that the cross-match algorithm is a trade-off between multiple requirements, in particular between completeness and correctness. It is thus not limited to a simple cone search.Reference papers DR1-DPACP-17 DR2-DPACP-41}
If you have used Gaia data in your research, please use the following acknowledgement:
This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement.
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|Unique Gaia source identifier|
|original_ext_source_id||char||meta.id.cross||Original External Catalogue source identifier|
|angular_distance||float||pos.angDistance||arcsec||Angular Distance between the two sources|
|xm_flag||short||meta.code.status||Cross-match algorithm flag|
|ravedr6_oid||int||meta.id.cross||External Catalogue source identifier|
|number_of_neighbours||short||meta.number||Number of neighbours in Gaia Catalogue|