VLA Goulds Belt Survey: Orion Complex Radio Source Catalog

A catalog of 374 and 354 radio sources detected at 4.5 and 7.5 GHz from the Very Large Array Gould's Belt Survey. The data covers 2.26 square degrees of the Orion Molecular Clouds, with 148 sources associated with known young stellar objects and 86 new candidate young stars. Observations were conducted by the National Radio Astronomy Observatory in three epochs during 2011.

Use Cases

• Identify candidate young stellar objects based on radio properties consistent with young stars.
• Analyze source variability across three observational epochs separated by approximately one month.
• Study the radio to X-ray luminosity relation for young stellar objects in regions of high nebulosity.
• Plan targeted follow-up observations with the Very Long Baseline Array to determine stellar distances.
• Map the distribution of radio sources across specific sub-regions like the Orion Nebula Cluster and NGC 2024.

Strengths

• High-sensitivity survey with a nearly uniform rms noise of 60 microJansky per beam across most regions.
• Covers 2.26 square degrees across 210 individual fields in the Orion Molecular Clouds.
• Sources were identified through visual inspection to improve reliability over automated methods in clustered regions.
• Observations were conducted in three epochs, allowing for variability analysis.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Source identification relied on visual inspection, which may introduce subjective bias compared to fully automated methods.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Observations obtained with the Karl G. Jansky Very Large Array (JVLA) in its A configuration.

Time Range

Observations from June 25 to August 29, 2011.

Freshness

Last updated 2026-03-13 19:22:47.550010; freshness should be verified.

Geography

Orion Molecular Clouds A and B, including sub-regions like the Orion Nebula Cluster, sigma Ori, and NGC 2024.