Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992acasn..33..341l&link_type=abstract
Acta Astronomica Sinica (ISSN 0001-5245), vol. 33, no. 4, p. 341-345.
Astronomy and Astrophysics
Astronomy
Active Galactic Nuclei, Sky Surveys (Astronomy), X Ray Astronomy, Background Radiation, Cosmic Rays, Flux Density
Scientific paper
An AGN subsample extracted from an Eistein extended medium sensitivity
survey sample is used to study AGN number density-limiting flux for
fluxes from 5 x 10 exp -14 to 1 x 10 exp -11 erg/sq cm/s in an 0.3-3.5
energy band. It is estimated that 13.5 percent of X-ray background comes
from AGN which are are brighter than 5 x 10 exp -14 erg/sq cm/s.
Hu Yue-Dong
Li Zhi-Qing
Zhou You-Yuan
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