European Southern Observatory Catalog

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The European Southern Observatory Catalog is an astronomical catalog that contains a log of observations performed with the ESO telescopes at La Silla and Paranal observatories, including the APEX submillimeter telescope on Llano de Chajnantor, as well as the UKIDSS/WFCAM data obtained at the UK Infrared Telescope facility in Hawaii. The observations themselves normally have a proprietary period of one year.{{cite web|title=Data Access Policy for ESO Data held in the ESO Science Archive Facility|url=http://archive.eso.org/cms/eso-data-access-policy.html|work=Science Users Information|publisher=European Southern Observatory|accessdate=15 October 2012}} After this period the archival data sets can be requested by users worldwide.{{Cite web |title=ESO Catalogue Facility |url=https://www.eso.org/qi/ |access-date=2022-05-12 |website=www.eso.org}}