VizieR Online Data Catalog: 3XMM-DR4 QSO candidates at 3<z<5.5 (Khorunzhev+, 2016)
Abstract
The catalog of X-ray selected (3XMM-DR4) quasar candidates with photometric redshifts 2.75<z<5.5. The photometric redshifts have been determined using SDSS, 2MASS and WISE photometry. Known spectroscopic redshifts from the Half Million Quasars catalogue (Flesch, 2015, Cat. VII/273) and the SDSS spectroscopic programm (Alam et al., 2015ApJS..219...12A) are also included. table1.dat lists objects with photometric redshifts 2.7<z5.5. table2.dat lists known spectroscopic z>3 quasars from 3XMM-DR4 that have not been selected by our algorithm.
(2 data files).- Publication:
-
VizieR Online Data Catalog
- Pub Date:
- March 2016
- Bibcode:
- 2016yCat..90420313K
- Keywords:
-
- X-ray sources;
- QSOs;
- Redshifts;
- Photometry: SDSS