Chandra Observations of Three SDSS Quasars at z~6

D. A. Schwartz, C. C. Cheung, J. F. C. Wardle

Chandra snapshot observations of the three most distant quasars then known, at redshifts 5.82, 5.99, and 6.28, gave signficant detections even in the short, 6 -- 8 ks, observations…