Catalog of 3 < z < 5.5 Quasar Candidates Selected among XMM-Newton Sources and Its Spectroscopic Verification

  • Georgii Khorunzhev, Sergey V Sazonov, Rodion Burenin, Maxim Eselevich
  • Published 2017 in Front. Astron. Space Sci.

Abstract

We have compiled a catalog of 903 quasar candidates (including known quasars) at 3 < z < 5.5 selected among X-ray sources from the XMM-Newton serendipitous survey (3XMM-DR4 catalog). We used photometric SDSS, 2MASS, and WISE data to select the objects. The surface number density of objects in our sample exceeds that in the SDSS spectroscopic quasar sample at the same redshifts by a factor of 1.5. We have performed spectroscopic observations of a subsample of new quasar candidates using a new lowand medium-resolution spectrograph at the 1.6-m AZT-33IK telescope (Mondy, Russia) and demonstrated that the purity of these candidates is about 65%. We have discovered one of the most distant (z = 5.08) X-ray selected quasars.

DOI: 10.3389/fspas.2017.00037

Cite this paper

@inproceedings{Khorunzhev2017CatalogO3, title={Catalog of 3 < z < 5.5 Quasar Candidates Selected among XMM-Newton Sources and Its Spectroscopic Verification}, author={Georgii Khorunzhev and Sergey V Sazonov and Rodion Burenin and Maxim Eselevich}, booktitle={Front. Astron. Space Sci.}, year={2017} }