Catalogs of Ultraviolet Sources

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What is the name of the catalog that contains ultraviolet sources observed by the International Ultraviolet Explorer (IUE) satellite?

  1. The IUE Ultraviolet Spectral Atlas
  2. The IUE Ultraviolet Variability Catalog
  3. The IUE Ultraviolet Source Catalog
  4. The IUE Ultraviolet Background Catalog
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