Open AccessHard and soft X-ray selected active galactic nuclei: two distinct populations?
Author(s) -
A. Franceschini,
J. M. Martín-Mirones,
L. Danese,
G. de Zotti
Publication year - 1993
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-8711
pISSN - 0035-8711
DOI - 10.1093/mnras/264.1.35
Subject(s) - physics , astrophysics , active galactic nucleus , redshift , luminosity , galaxy , source counts , x ray background , qsos , spectral line , extrapolation , astronomy , population , quasar , statistics , demography , mathematics , sociology
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