2011ApJ...736...57Z

We present the discovery of only the second radio-selected z ∼ 6 quasar. We identified SDSS J222843.54+011032.2 (z = 5.95) by matching the optical detections of the deep Sloan Digital Sky Survey Stripe 82 with their radio counterparts in the Stripe 82 Very Large Array Survey. We also matched the Canadian-France-Hawaiian Telescope Legacy Survey Wide with the Faint Images of the Radio Sky at Twenty cm survey but have yet to find any z ∼ 6 quasars in this survey area. The discovered quasar is optically faint, z = 22.3 and M₁₄₅₀∼ -24.5, but radio bright, with a flux density of f_1.4 GHz, peak_ = 0.31 mJy and a radio loudness of R ∼ 1100 (where R ≡ f_5 GHz_/f 2500_). The i - z color of the discovered quasar places it outside the color selection criteria for existing optical surveys. We conclude by discussing the need for deeper wide-area radio surveys in the context of high-redshift quasars.