Table information for 'alerce_tap.xmatch'

General

Table Description:

Cross-match results linking objects to external astronomical catalogs, including angular separation and the matched object's identifier in the external catalog.

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

Resource Description:

Multi-survey astronomical object catalog containing astrometric and statistical information from multiple surveys. This table provides aggregated properties for astronomical objects including position, detection statistics, and temporal coverage.

For a list of all services and tables belonging to this table's resource, see Information on resource 'ALeRCE Multi-Survey Object Catalog'

Citing this table

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

@MISC{vo:alerce_tap_xmatc,
  year=2026,
  title={Catalog Cross-Matches},
  author={{ALeRCE} Team},
  url={http://tap.alerce.online/tableinfo/alerce_tap.xmatch},
  howpublished={{VO} resource provided by the {ALeRCE} {TAP} service}
}

Columns

Sorted alphabetically. [Sort by DB column index]

NameTable Head DescriptionUnitUCD
catid Catid Catalog identifier N/A meta.id
created_date Created_date Date record was created N/A time.creation
dist Dist Cross-match distance arcsec pos.angDistance
oid Oid Object identifier N/A meta.id;src
oid_catalog Oid_catalog Object identifier in external catalog N/A meta.id.cross
sid Sid Survey identifier N/A meta.id
updated_date Updated_date Date record was last updated N/A time.processing

Columns that are parts of indices are marked like this.

VOResource

VO nerds may sometimes need VOResource XML for this table.