Sunyaev-Zeldovich Array 31-GHz Radio Source Catalog, 2005-2007

209 sources identified at 31 GHz from a 7.7 deg² sky survey conducted between late-2005 and mid-2007, with flux levels from 0.7 mJy to ~200 mJy. The catalog was created by NASA HEASARC in June 2012 based on data from the Owens Valley Radio Observatory's SZA interferometer. It includes derived source counts and comparisons with 1.4 GHz and 5 GHz archival data.

Use Cases

• Modeling radio source counts at 31 GHz based on the derived maximum-likelihood integrated source count formula.
• Analyzing the spectral index distribution of faint radio sources by comparing 31-GHz data with 1.4 GHz and 5 GHz observations.
• Investigating source overdensity in galaxy clusters relative to field sources using the derived overdensity metric.
• Calibrating or validating predictions for high-frequency radio source populations.

Strengths

• Contains 209 identified sources with a high significance threshold (>5-sigma).
• Covers a specific flux range from 0.7 mJy to ~200 mJy with a median rms sensitivity of 0.18 mJy/beam.
• Integrates complementary data from archival NVSS (1.4 GHz) and dedicated VLA observations at 5 GHz.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last updated 2026-03-13 18:14:07.034696; freshness should be verified.

Provenance

Source

NASA HEASARC, based on CDS Catalog J/ApJ/716/521 from the Owens Valley Radio Observatory.

Collection Method

Observations from the Sunyaev-Zeldovich Array interferometer, comprising 1907 observing tracks.

Time Range

Primary survey data from 2005-11-13 to 2007-07 25.

Freshness

Data collection ended in 2007; catalog published in 2012.

Geography

Covers 7.7 square degrees of the sky; specific celestial coordinates are not detailed in the provided description.