Properties of X-ray quasars

Details Properties of X-ray quasars Properties of X-ray quasars

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983cha%26a...7..309y&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 7, Issue 4, p. 309-314.

Astronomy and Astrophysics

Astrophysics

Scientific paper

A statistical analysis of the X-ray properties of 247 quasars observed by the Einstein Observatory in the 0.5-4.5 kev band is made. The main results are as follows. Among the various magnitude and redshift groups of 1619 known quasars, the proportion of X-ray sources is nearly constant. There is a strong correlation between the X-luminosity of Type-I Seyferts and the ratio of the equivalent widths of their Hg and [OIII] emission lines; the latter can be used as a X-luminosity indicator. The X-luminosity is correlated with both the optical luminosity and the radio luminosity above 2.5 GHz, suggesting that they have a similar emission mechanism and the regions of their emission are in that order. The X-luminosity is not correlated with either U-B or B-V. There is a weak correlation between the two colour indices.

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