Table information for 'gedr3spur.main'

General

This table is available for ADQL queries and through the TAP endpoint.

Resource Description: This table contains estimates of the "fidelity" of Gaia eDR3 astrometric solutions, a measure of the likelihood the eDR3 solution is physical rather than spurious obtained using a neural network trained on a small, hand-selected sample.

For a list of all services and tables belonging to this table's resource, see Information on resource 'A classifier for spurious astrometric solutions in Gaia EDR3'

Citing this table

This table has an associated publication. If you use data from it, it may be appropriate to reference 2021arXiv210111641R (ADS BibTeX entry for the publication) either in addition to or instead of the service reference.

To cite the table as such, we suggest the following BibTeX entry:

@MISC{vo:gedr3spur_main,
  year=2020,
  title={A classifier for spurious astrometric solutions in Gaia {EDR3}},
  author={Rybizki, J. and Green, G. and Rix, H.-W. and El-Badry, K. and Demleitner, M. and Zari, E. and Udalski, A. and Smart, R.L and Gould, A.},
  url={http://dc.zah.uni-heidelberg.de/tableinfo/gedr3spur.main},
  howpublished={{VO} resource provided by the {GAVO} Data Center}
}

Resource Documentation

The full data set is also available as a postgres dump (basically, tab-separated values with \N as NULL). This dump is sorted by source_ids, so you can bisect in it.

To obtain the dump (which we don't link here to keep crawlers from needlessly pulling 48 GB of data), run your preferred variant of:

curl -O http://vo.ari.uni-heidelberg.de/gedr3spur/dump.txt.gz

For the metadata, inspect the column metadata below in database order.

Columns

Sorted by DB column index. [Sort alphabetically]

NameTable Head DescriptionUnitUCD
source_id Source Id Gaia eDR3 unique source identifier. Note that this *cannot* be matched against the DR1 or DR2 source_ids. [Note id] N/A meta.id;meta.main
fidelity_v2 fidelity A probability that eDR3 has a good astrometric solution for this source, with values between 0 (meaning likely spurious solution) and 1 (meaning likely good solution). This is the published probability estimate. N/A stat.fit
theta_arcsec_worst_source θ Distance to the eDR3 source within 30 arcsec of the object for which ΔG-θ is maximal. See norm_dg for details. arcsec pos.angDistance
norm_dg ΔG' This is a heuristic measure for contamination by bright stars in the neighbourhood. It is computed as ΔG-θ, where θ is the distance to another Gaia eDR3 object in arcsec (reported in theta_arcsec_worst_source), and ΔG is the magnitude difference in mag. This column gives the maximum of the values for all eDR3 sources within 30 arcsecs of the object. N/A instr.background
dist_nearest_neighbor_at_least_2_fainter Dist Δm=-2 Distance to the nearest neighbour in gaia_source at least 2 m fainter than this source. arcsec pos.angDistance
dist_nearest_neighbor_at_least_equally_bright Dist Δm=0 Distance to the nearest neighbour in gaia_source at least as bright as this source. arcsec pos.angDistance
dist_nearest_neighbor_at_least_2_brighter Dist Δm=2 Distance to the nearest neighbour in gaia_source at least 2 m brighter than this source. arcsec pos.angDistance
dist_nearest_neighbor_at_least_4_brighter Dist Δm=4 Distance to the nearest neighbour in gaia_source at least 4 m brighter than this source. arcsec pos.angDistance
dist_nearest_neighbor_at_least_6_brighter Dist Δm=6 Distance to the nearest neighbour in gaia_source at least 6 m brighter than this source. arcsec pos.angDistance
dist_nearest_neighbor_at_least_10_brighter Dist Δm=10 Distance to the nearest neighbour in gaia_source at least 10 m brighter than this source. arcsec pos.angDistance
fidelity_v1 fidelity A probablity that eDR3 has a good astrometric solution for this source, with values between 0 (meaning likely spurious solution) and 1 (meaning likely good solution). This comes from a first version of the estimator that was reviewed based on an astro-ph paper. N/A stat.fit

Columns that are parts of indices are marked like this.

VOResource

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