VLA 6-GHz Observations of 178 Low-Redshift SDSS Quasars

178 low-redshift (0.2 < z < 0.3) optically selected quasars observed at 6 GHz with the Jansky Very Large Array. The table contains results from these observations, with 176 radio detections categorized into radio-loud and radio-quiet quasars. The data was created by NASA and last updated in March 2026.

Use Cases

• Classifying quasars as radio-loud or radio-quiet based on 6 GHz spectral luminosity thresholds.
• Analyzing the relationship between radio emission and star formation in host galaxies based on radio size and luminosity.
• Testing unified AGN models against the observed radio luminosity function and extended emission.
• Comparing radio properties of a volume-limited sample of quasars more luminous than M_i = -23.

Strengths

• Volume-limited sample of 178 quasars provides a well-defined statistical basis.
• High luminosity sensitivity (L_6 ~ 10^21 W/Hz) enabling distinction between radio-loud and radio-quiet populations.
• Clear categorization of 176 detections into two groups (20% radio-loud, 80% radio-quiet).
• Observations use a specific cosmology (H_0 = 70 km/s/Mpc, Omega_Lambda = 0.7) for consistent calculations.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• File formats include BIN and HTML, which may require specialized tools for access.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Reprocessed VLA C configuration observations at 6 GHz with a 2 GHz bandwidth.

Time Range

Observations cover quasars with redshifts between 0.2 and 0.3.

Freshness

Last updated 2026-03-13 18:50:36.147600; freshness should be verified.

Geography

Observations likely cover the celestial sphere, based on SDSS quasar sample.