VLA Orion Nebula Cluster Catalog: 556 Compact Radio Sources

556 compact radio sources detected in the Orion Nebula Cluster from a 30-hour observation with the Karl G. Jansky Very Large Array in 2012. The catalog increases the known sample of compact radio sources in the region by more than a factor of seven and provides radio spectral indices for 170 sources. The table was created by NASA's HEASARC in September 2016 based on data from the National Radio Astronomy Observatory.

Use Cases

• Cross-match radio sources with X-ray and infrared populations based on the multi-wavelength comparison mentioned.
• Analyze radio spectral index trends for 170 sources with index uncertainties less than +/-0.5.
• Study source variability and emission structure on different spatial scales as noted in the description.
• Benchmark new observations against this deep catalog, which has a nominal rms noise of 3 µJy/beam.

Strengths

• Deep observation totaling 30 hours with the high-resolution VLA A configuration.
• Catalog of 556 sources, increasing the known sample by more than a factor of seven.
• Radio spectral indices determined for 170 sources with controlled uncertainties.
• Simultaneous Chandra X-Ray Observatory observations for some epochs, enabling multi-wavelength study.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect observational bias inherent to the single-pointing VLA setup and primary beam response.

Provenance

Source

National Radio Astronomy Observatory (NRAO) / NASA HEASARC

Collection Method

Single-pointing observation with the Karl G. Jansky Very Large Array (JVLA) using C-band receivers in full polarization mode.

Time Range

Observations carried out on 2012 September 30 and October 2-5.

Freshness

Last updated 2026-03-13 18:22:31.521842; freshness should be verified.

Geography

Orion Nebula Cluster (ONC).