High Quality Content by WIKIPEDIA articles! The UKIRT Infrared Deep Sky Survey or UKIDSS is a near-infrared imaging survey using the WFCAM wide field camera on the United Kingdom Infrared Telescope on Mauna Kea in Hawaii. Survey observations were commenced in 2005. UKIDSS consists of five surveys covering a range of areas and depths, using various combinations of five near-infrared filters. UKIDSS as a large-scale near infrared survey follows 2MASS and anticipates the VISTA telescope in the Southern hemisphere. It aims to cover 7500 square degrees of the Northern sky. Four particular areas of investigation for UKIDSS are: "the coolest and nearest brown dwarfs, high-redshift dusty starburst galaxies, elliptical galaxies and galaxy clusters at redshifts 1 < z < 2, and the highest-redshift quasars, at z = 7". The UKIDSS data become available online to the ESO community immediately upon entering the WFCAM Science Archive (WSA), and are then released to the world 18 months later.

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