VLA Coma Cluster 1.4-GHz Radio Source Catalog with SDSS Counterparts

Two ~0.5 square degree fields in the Coma cluster of galaxies were observed at 1.4 GHz using the Very Large Array (VLA) over five days in June 2006. The resulting catalog contains 1030 radio sources detected at or above a 5-sigma significance threshold, with 628 within the combined observed area, and includes optical identifications from the Sloan Digital Sky Survey (SDSS). This table was created by NASA's HEASARC in December 2011 based on source files from the CDS catalog.

Use Cases

• Identifying active galactic nuclei in cluster elliptical galaxies based on radio detections and optical magnitudes.
• Studying star-forming galaxies with low star formation rates (as low as 0.1 solar masses per year) using radio and optical data.
• Analyzing the spatial distribution of radio sources in the cluster core and southwest infall region.
• Cross-matching deep radio continuum observations with multiwavelength data for population studies.

Strengths

• Deep radio observations reaching a sensitivity of 0.022 mJy rms per beam.
• Catalog includes 1030 radio sources detected at >= 5 sigma, with optical counterparts from SDSS.
• Observations target two distinct regions (core and infall) selected for abundant pre-existing multiwavelength data.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• The catalog does not include the table of rejected optical counterparts.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

National Aeronautics and Space Administration (NASA HEASARC), based on CDS catalog J/AJ/137/4436.

Collection Method

Deep 1.4-GHz VLA radio continuum observations over five days in June 2006, with optical identifications from SDSS.

Time Range

Observations performed in 2006.

Freshness

Last updated 2026-03-13 20:02:31.529498; freshness should be verified.

Geography

Coma cluster of galaxies, specifically the 'Coma 1' (core) and 'Coma 3' (southwest infall) fields.