M. DiPompeo, J. Bovy, A. Myers, и D. Lang. (2015)cite arxiv:1507.02884Comment: 11 pages, 18 figures, accepted for publication in MNRAS. Quasar catalog available here: http://www.mpia.de/homes/joe/xdqsozcat_galex_ukidss_wise_p20.fits.gz and code is available here: https://github.com/xdqso/xdqso.