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NASA HEASARC provides a catalog of over 130,000 quasar candidates with matched optical and near-infrared photometry. The data results from matching the Sloan Digital Sky Survey (SDSS) DR6 Photometric Quasar catalog to the UKIRT Infrared Digital Sky Survey (UKIDSS) Large Area Survey Data Release 3, covering approximately 1200 square degrees. This table was created by the HEASARC in September 2012 based on an external catalog file.
License is listed as 'other-license-specified'; terms should be reviewed before use. Available file formats are BIN and HTML.