Small Magellanic Cloud MOST 843-MHz Radio Source Catalog

A catalog of 1689 radio-continuum sources in the field of the Small Magellanic Cloud (SMC). The sources were detected at 843 MHz from a 36-square-degree survey conducted with the Molonglo Observatory Synthesis Telescope (MOST). This table was created by NASA's HEASARC in September 2014 based on an external catalog.

Use Cases

• Identify and catalog radio point sources in the SMC based on the 843 MHz survey data.
• Study the distribution and density of radio sources in a nearby dwarf galaxy.
• Cross-match radio sources with optical or infrared catalogs to identify multi-wavelength counterparts.
• Analyze source detection thresholds and completeness based on the 5-sigma flux density criterion.
• Investigate radio emission properties using the specified beam size and rms noise parameters.

Strengths

• Contains 1689 confirmed radio-continuum sources.
• Sources were visually examined to exclude artifacts, confirming genuine point sources.
• Observations had a defined beam size of ~45 arcseconds and an rms noise of 0.7 mJy/beam.
• Based on a survey covering a significant 36-square-degree area containing the SMC.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is known, but the number of features per source is unknown.
• Last updated 2026-03-13 19:53:38.566867; freshness should be verified.

Provenance

Source

National Aeronautics and Space Administration (NASA HEASARC), based on CDS Catalog J_other/Ser/183.103/.

Collection Method

Sources detected from MOST radio survey images using the MIRIAD task 'imsad' with a flux density > 5 sigma (3.5 mJy), followed by visual confirmation.

Time Range

Survey conducted as referenced in Turtle et al. 1998.

Freshness

Last updated 2026-03-13 19:53:38.566867.

Geography

Field of the Small Magellanic Cloud (SMC).