Table · dataset · 2020
Hipparcos2 Best Neighbour
Listed in Gaia@AIP
Table hipparcos2_best_neighbour lists each matched external catalogue object with its best neighbour in Gaia.
Description
The cross-match algorithm is not symmetric and searches Hipparcos2 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.
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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: Marrese et al. (2017) Marrese et al. (2019)
Links
Where it is published
- DOI doi.org/10.17876/gaia/edr.3/14 ↗
DOI / persistent id · from gaia aip de
Catalogue records · 1
- OAI-PMH record gaia.aip.de/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai%3Agaia… ↗
metadata API · from gaia aip de
Topics
- From keywords
- Astronomy & Astrophysics · Earth & Environmental Science · Physics
- Inferred from text
- Tabular 65%
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| Gaia@AIP | oai:gaia.aip.de:tables/gaiaedr3.hipparcos2_best_neighbour | 9 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| concepts[field].local:field:astronomy | mapping · gaia aip de | connector:gaia_aip_de@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · gaia aip de | connector:gaia_aip_de@1.0.0 | |
| concepts[field].local:field:physics | mapping · gaia aip de | connector:gaia_aip_de@1.0.0 | |
| concepts[modality].local:modality:tabular | enrichment · gaia aip de | keyword-concept-rules@1.0.0 | title+description (65%) |
| description | source · gaia aip de | connector:gaia_aip_de@1.0.0 | /metadata/dc/description |
| license_text | source · gaia aip de | connector:gaia_aip_de@1.0.0 | |
| publication_date | source · gaia aip de | connector:gaia_aip_de@1.0.0 | |
| title | source · gaia aip de | connector:gaia_aip_de@1.0.0 | /metadata/dc/title |