Table information for 'alerce_tap.object'

General

Table Description:

This table contains aggregated information about astronomical objects observed in multiple surveys. Each record corresponds to a unique object identified by its position and survey. The table includes astrometric properties (mean RA/Dec), detection statistics (number of detections, forced photometry measurements, non-detections), and temporal coverage (first and last observation dates).

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_objec,
  year=2026,
  title={Object table},
  author={{ALeRCE} Team},
  url={http://tap.alerce.online/tableinfo/alerce_tap.object},
  howpublished={{VO} resource provided by the {ALeRCE} {TAP} service}
}

Columns

Sorted by DB column index. [Sort alphabetically]

NameTable Head DescriptionUnitUCD
oid Oid Internal object identifier N/A meta.id;src
tid Tid Telescope identifier N/A meta.id
sid Sid Survey identifier N/A meta.id
meanra Meanra Mean right ascension (ICRS) deg pos.eq.ra;meta.main
meandec Meandec Mean declination (ICRS) deg pos.eq.dec;meta.main
sigmara Sigmara Standard deviation of right ascension deg stat.error;pos.eq.ra
sigmadec Sigmadec Standard deviation of declination deg stat.error;pos.eq.dec
firstmjd Firstmjd First observation MJD d time.start;obs
lastmjd Lastmjd Last observation MJD d time.end;obs
deltamjd Deltamjd Time span between first and last observation d time.interval
n_det N_det Number of detections N/A meta.number
n_forced N_forced Number of forced photometry measurements N/A meta.number
n_non_det N_non_det Number of non-detections N/A meta.number
created_date Created_date Date when the record was created N/A time.creation
updated_date Updated_date Date when the 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.