ANS Ultraviolet Photometry Catalog: 3,573 Stellar Point Sources

The ANS Ultraviolet Photometry Catalog from NASA HEASARC contains 3,573 reliable observations of point sources, mostly stars, from the Astronomical Netherlands Satellite (ANS). The ANS operated between October 1974 and April 1976, observing in five ultraviolet channels centered around 150, 180, 220, 250, and 330 nm. This table was created in September 2011 based on the CDS Catalog II/97.

Use Cases

• Analyze stellar ultraviolet spectral energy distributions based on the five ANS photometric bands.
• Compare ultraviolet magnitudes and fluxes with ground-based UBV data and other UV satellite missions mentioned in the description.
• Study stellar variability or duplicity based on the comments and notes for individual objects.
• Calibrate or validate stellar atmospheric models using the established ANS photometric system.

Strengths

• Contains 3,573 objects, filtered from an original 4,800 observed positions to include only reliable point-source detections.
• Photometric system has a reported repeatability of 0.5-1.0% and a linear dynamic range of at least a factor of 20,000.
• Includes ultraviolet magnitudes, positions, spectral types, UBV data, and comments on object characteristics.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data is from a specific historical mission (1974-1976) with a spectral resolution of about 15 nm, which is poorer than other contemporary UV instruments.

Provenance

Source

National Aeronautics and Space Administration (NASA), High Energy Astrophysics Science Archive Research Center (HEASARC).

Collection Method

Observations from the ultraviolet photometer onboard the Astronomical Netherlands Satellite (ANS).

Time Range

October 1974 to April 1976.

Freshness

Last updated 2026-03-13 16:33:24.566729; freshness should be verified.

Geography

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