Initially classified as a galaxy from the COSMOS survey, but since
found to be a high-redshift quasar amongst a complete sample of
northern ROSAT X-ray sources (Zickgraf et al., 1997A&A...323L..21).
37. RX J1028-0844 (z = 4.276).Two weak DLA candidates with associated
metals are detected at z = 3.42 and 4.05.
See Zickgraf et al. (1997b; Paper V).