MOST ATLAS: 843-MHz Radio Source Catalog for the ELAIS-S1 Field

31 separate 12-hour observations from the Molonglo Observatory Synthesis Telescope were combined into a single image with 62 arcsec x 43 arcsec resolution. The catalog presents 843-MHz radio sources, their ATLAS counterparts, and spectral index distributions in the ELAIS-S1 field, created by the NASA HEASARC in January 2013. It investigates spectral index trends with flux density and redshift, and includes an initial sample of faint compact steep-spectrum sources.

Use Cases

• Analyzing spectral index distribution as a function of flux density based on the catalog's primary investigation.
• Studying the correlation between spectral index and redshift for sources with reliable redshifts as mentioned in the reference paper.
• Identifying and characterizing faint compact steep-spectrum radio sources from the initial sample presented.
• Cross-matching 843-MHz sources with their Australia Telescope Large Area Survey (ATLAS) counterparts provided in the catalog.

Strengths

• Data is derived from 31 separate 12-hour observations combined for improved signal.
• Spatial resolution is specified as 62 arcsec x 43 arcsec.
• Catalog includes spectral index distributions and ATLAS counterpart information.

Limitations

• Row count is unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.

Provenance

Source

NASA HEASARC, based on CDS Catalog J/MNRAS/421/1644.

Collection Method

Observations from the Molonglo Observatory Synthesis Telescope (MOST).

Time Range

Observational date range not specified in input.

Freshness

Last updated 2026-03-13 17:22:43.853805; freshness should be verified

Geography

Covers the European Large Area ISO Survey-South 1 (ELAIS-S1) field.