Updated Zwicky Catalog: Galaxy Coordinates and Redshifts for 19,369 Objects

19,369 galaxies form the Updated Zwicky Catalog (UZC), a foundational resource for the CfA redshift surveys. The catalog provides corrected coordinates with ~2 arcsecond errors and homogeneously estimated radial velocities for 98% of the CfA spectra. This database was created by NASA's HEASARC in 2000 based on a 1999 publication from the Center for Astrophysics.

Use Cases

• Study galaxy clustering and large-scale structure based on the catalog's coordinates and redshifts.
• Analyze tidal interactions among galaxies based on the 1,807 identified 'multiplets'.
• Calibrate redshift survey methodologies based on the catalog's estimated error rates and completeness statistics.
• Examine spectral properties of galaxies based on the indicated presence of emission lines.

Strengths

• Coordinates for 19,369 galaxies with ~2 arcsecond errors.
• Homogeneously estimated redshifts for 98% of the CfA spectra (14,632 objects).
• Catalog is ~96% complete to a magnitude limit of m_Zw <= 15.5.
• Includes 7,257 previously unpublished redshifts from the CfA2 survey.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data is based on a 1999 publication; freshness should be verified for contemporary research.
• Row count is unknown for the full downloadable dataset, which may limit suitability assessment.

Provenance

Source

Center for Astrophysics (CfA) / NASA HEASARC

Collection Method

Compilation and reanalysis of CfA redshift survey data and literature.

Time Range

Publication date 1999, database created 2000.

Freshness

Last updated 2026-03-13 17:00:41.760959; freshness should be verified.

Geography

Celestial coordinates; complete in specific right ascension and declination ranges.