Physics
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984xue..conf..132a&link_type=abstract
In its X-Ray and UV Emission from Active Galactic Nuclei p 132-134 (SEE N85-17790 08-88)
Physics
1
Quasars, Red Shift, X Ray Spectra, Heao 2, Luminous Intensity, Stellar Magnitude
Scientific paper
The X-ray properties of high redshift quasars were probed using grism/grens plates covering 13 sq deg of sky imaged to very sensitive X-ray flux levels with the Imaging Proportional Counter on the Einstein Observatory. Optical magnitudes are estimated from image diameter measurements to obtain an X-ray flux detection, or a sensitive X-ray flux upper limit, from the IPC image. Eleven out of 52 optically selected quasars are detected in X-rays at 3 sigma. The alpha ox value is 1.49 + or - 0.04 for the 52 objects.
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