COSMOS Field VLBA Observations: 1.4-GHz AGN Catalog
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Description
468 radio sources were detected with the Very Long Baseline Array (VLBA) from an input catalog of 2,865 known sources in the Cosmic Evolution Survey (COSMOS) field. This table contains 504 entries, including the 468 VLBA-detected sources and individual components for multi-component sources, compiled by the National Aeronautics and Space Administration. The catalog's primary purpose is to serve as an AGN catalog and includes complementary multiwavelength (optical, infrared, X-ray) information for the detected sources.
Use Cases
Identify and study active galactic nuclei (AGN) based on VLBI detection and multi-wavelength properties.
Analyze the relationship between radio source compactness and total flux density, as the description notes fainter sources have a greater fraction of luminosity in a compact core.
Investigate the morphological classification of host galaxies (e.g., early type vs. spiral) for VLBA-detected sources across different redshifts.
Study the detection fraction of radio sources as a function of VLA flux density and redshift within the COSMOS field.
Strengths
Unprecedented combination of source count (2,865 input sources), sensitivity, angular resolution, and area covered for a wide-field VLBI project.
Largest sample assembled of VLBI-detected sources in the sub-mJy regime, with 468 detections.
Includes complementary multiwavelength (optical, infrared, X-ray) information for the VLBA-detected sources.
Limitations
Column-level documentation is absent; field semantics must be inferred after download.
Row count is unknown, which may limit suitability assessment.
Description metadata is limited; actual data quality requires manual inspection after download.
Provenance
Source
National Aeronautics and Space Administration
Collection Method
Wide-field Very Long Baseline Interferometry (VLBI) observations at 1.4 GHz using the Very Long Baseline Array (VLBA), with complementary multiwavelength data collected from the literature.
Time Range
Observations cover the Cosmic Evolution Survey (COSMOS) field; specific observation dates are not provided.
Freshness
Last updated 2026-03-13 17:20:30.513423; freshness should be verified.
Geography
Covers the COSMOS (Cosmic Evolution Survey) field, an area with exceptional multi-wavelength coverage.
License is listed as 'other-license-specified'; specific terms must be checked before use.