Table information for 'ztf.ps1_ztf'

General

Table Description:

Pan-STARRS1 catalog cross-match properties for ZTF detections including griz photometry and star-galaxy scores for the three nearest PS1 sources.

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

Resource Description:

Legacy ZTF astronomical catalog containing objects, detections, photometric measurements, classifications, and cross-matches from the Zwicky Transient Facility (ZTF) survey, as processed by the ALeRCE broker pipeline.

For a list of all services and tables belonging to this table's resource, see Information on resource 'ALeRCE ZTF Legacy Catalog'

Citing this table

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

@MISC{vo:ztf_ps1_ztf,
  year=2026,
  title={{ZTF} Pan-{STARRS1} Cross-Matches},
  author={{ALeRCE} Team},
  url={http://tap.alerce.online/tableinfo/ztf.ps1_ztf},
  howpublished={{VO} resource provided by the {ALeRCE} {TAP} service}
}

Columns

Sorted alphabetically. [Sort by DB column index]

NameTable Head DescriptionUnitUCD
candid Candid Candidate identifier N/A meta.id
distpsnr1 Distpsnr1 Angular distance to closest PS1 source arcsec pos.angDistance
distpsnr2 Distpsnr2 Angular distance to second closest PS1 source arcsec pos.angDistance
distpsnr3 Distpsnr3 Angular distance to third closest PS1 source arcsec pos.angDistance
nmtchps Nmtchps Number of PS1 sources within 30 arcsec of the candidate N/A meta.number
objectidps1 Objectidps1 PS1 object ID of closest source N/A meta.id
objectidps2 Objectidps2 PS1 object ID of second closest source N/A meta.id
objectidps3 Objectidps3 PS1 object ID of third closest source N/A meta.id
oid Oid ZTF object identifier N/A meta.id;src
sgmag1 Sgmag1 PS1 g-band magnitude of closest source mag phot.mag;em.opt.g
sgmag2 Sgmag2 PS1 g-band magnitude of second closest source mag phot.mag;em.opt.g
sgmag3 Sgmag3 PS1 g-band magnitude of third closest source mag phot.mag;em.opt.g
sgscore1 Sgscore1 Star-galaxy score of closest PS1 source (0=galaxy, 1=star) N/A src.class.starGalaxy
sgscore2 Sgscore2 Star-galaxy score of second closest PS1 source N/A src.class.starGalaxy
sgscore3 Sgscore3 Star-galaxy score of third closest PS1 source N/A src.class.starGalaxy
simag1 Simag1 PS1 i-band magnitude of closest source mag phot.mag;em.opt.i
simag2 Simag2 PS1 i-band magnitude of second closest source mag phot.mag;em.opt.i
simag3 Simag3 PS1 i-band magnitude of third closest source mag phot.mag;em.opt.i
srmag1 Srmag1 PS1 r-band magnitude of closest source mag phot.mag;em.opt.r
srmag2 Srmag2 PS1 r-band magnitude of second closest source mag phot.mag;em.opt.r
srmag3 Srmag3 PS1 r-band magnitude of third closest source mag phot.mag;em.opt.r
szmag1 Szmag1 PS1 z-band magnitude of closest source mag phot.mag;em.opt.z
szmag2 Szmag2 PS1 z-band magnitude of second closest source mag phot.mag;em.opt.z
szmag3 Szmag3 PS1 z-band magnitude of third closest source mag phot.mag;em.opt.z
unique1 Unique1 Uniqueness flag for closest PS1 match N/A meta.code.qual
unique2 Unique2 Uniqueness flag for second closest PS1 match N/A meta.code.qual
unique3 Unique3 Uniqueness flag for third closest PS1 match N/A meta.code.qual

Columns that are parts of indices are marked like this.

VOResource

VO nerds may sometimes need VOResource XML for this table.