PSCz: Redshift and Photometry for 18,351 IRAS Point Sources

The IRAS Point Source Catalog Redshift Survey provides data for 18,351 infrared sources across 84% of the sky with low extinction. It contains redshifts for 14,677 galaxies, infrared and optical photometry, and over 120 parameters per source, compiled by NASA HEASARC based on CDS Catalog VII/221. The catalog was designed to include nearly all galaxies brighter than 0.595 Jy at 60 microns within its coverage area.

Use Cases

• Analyzing galaxy redshift distributions based on the 14,677 available redshifts.
• Studying correlations between infrared and optical photometry for extragalactic objects.
• Investigating large-scale structure and galaxy clustering using the sky coverage and source positions.
• Identifying and studying galaxies selected by their 60-micron flux, as per the survey's 0.595 Jy selection criterion.

Strengths

• Contains 18,351 sources with over 120 parameters per entry in the full version.
• Provides redshifts for 14,677 confirmed or possible galaxies.
• Covers 84% of the sky, targeting areas with low extinction for reliable optical follow-up.
• Includes a 'short' version with 19 parameters for most studies, simplifying initial analysis.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count for the specific hosted version is unknown, which may limit suitability assessment.
• Some sources are not galaxies, and some entries are multiple observations of the same galaxy.

Provenance

Source

NASA HEASARC, based on CDS Catalog VII/221 from the Centre de Données astronomiques de Strasbourg.

Collection Method

Survey of redshifts, infrared and optical photometry for sources selected from the IRAS Point Source Catalog.

Time Range

null

Freshness

Last updated 2026-03-13 19:10:48.457316; freshness should be verified.

Geography

84% of the sky with low extinction.