RX J1759.4+6638: an x-ray selected quasars at a redshift of 4.320

Details RX J1759.4+6638: an x-ray selected quasars at a redshift of 4.320 RX J1759.4+6638: an x-ray selected quasars at a redshift of 4.320

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aj....107.1270h&link_type=abstract

The Astronomical Journal, vol. 107, no. 4, p. 1270-1273

Astronomy and Astrophysics

Astronomy

37

Data Reduction, Emission Spectra, Quasars, Red Shift, Spectrophotometry, Spectrum Analysis, X Ray Astronomy, X Ray Spectra, Astronomical Coordinates, Rosat Mission, Sky Surveys (Astronomy), Space Density, Spectrographs

Scientific paper

We report the discovery of an x-ray selected Quasi-Stellar Objects (QSO) at a redshift of 4.320 +/- 0.005. This is the most distant x-ray selected object known, and it is the eighth most distant QSO known. The properties of this QSO are very similar to other QSOs at redshifts greater than 4. The x-ray discovery of this object, and that of high redshift clusters of galaxies, shows that present x-ray surveys are reaching depths competitive with other methods.

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