PSZ1: Planck Catalog of 1,227 Galaxy Clusters from Sunyaev-Zeldovich Effect

1,227 galaxy clusters and candidates identified via the Sunyaev-Zeldovich effect using 15.5 months of Planck satellite data. The updated catalog from NASA HEASARC contains 947 confirmed clusters, with redshifts for 913 systems and mass estimates derived from the Yz proxy. The catalog was first published in 2013 and updated to version 2.1 in October 2015.

Use Cases

• Validate cosmological models based on the catalog's 947 confirmed galaxy clusters.
• Study cluster mass scaling relations using the Yz mass proxy estimates.
• Train or test machine learning classifiers for SZ signal detection based on the novel neural-network quality flag.
• Analyze the completeness and purity of SZ-selected cluster samples, given the estimated 94% catalog purity.

Strengths

• 947 confirmed clusters, including 214 newly discovered through Planck follow-up observations.
• Redshifts provided for 913 systems, with 736 (~80.6%) being spectroscopic.
• Catalog purity is estimated to be 94%, based on an artificial neural-network classification.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

NASA HEASARC, based on Planck Collaboration data and CDS Catalog J/A+A/581/A14.

Collection Method

Derived from Sunyaev-Zeldovich effect detections using the first 15.5 months of Planck satellite observations.

Time Range

Observational data from the first 15.5 months of the Planck mission.

Freshness

Last updated 2026-03-13 18:45:15.768044; freshness should be verified.

Geography

All-sky coverage.