X-ray QSO evolution from a very deep ROSAT survey | Zendy

L. R. Jones | Zendy; I. M. McHardy | Zendy; M. R. Merrifield | Zendy; K. O. Mason | Zendy; Phil Smith | Zendy; Roberto Abraham | Zendy; G. BranduardiRaymont | Zendy; A. M. Newsam | Zendy; Gavin Dalton | Zendy; M. Rowan-Robinson | Zendy; Gerard A. Luppino | Zendy

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X-ray QSO evolution from a very deep ROSAT survey

Author(s) -

L. R. Jones,

I. M. McHardy,

M. R. Merrifield,

K. O. Mason,

Phil Smith,

Roberto Abraham,

G. BranduardiRaymont,

A. M. Newsam,

Gavin Dalton,

M. Rowan-Robinson,

Gerard A. Luppino

Publication year - 1997

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/285.3.547

Subject(s) - physics , astrophysics , qsos , rosat , redshift , luminosity function , luminosity , redshift survey , quasar , astronomy , eddington luminosity , flux (metallurgy) , galaxy , materials science , metallurgy

In the deepest optically identified X-ray survey yet performed, we haveidentified 32 X-ray selected QSOs to a flux limit of 2x10^{-15} erg cm^{-2}s^{-1} (0.5-2 keV). The survey, performed with the ROSAT PSPC, has 89%spectroscopic completeness. The QSO log(N)-log(S) relation is found to have abreak to a flat slope at faint fluxes. The surface density of QSOs at thesurvey limit is 230+/-40 per square degree, the largest so far of any QSOsurvey. We have used this survey to measure the QSO X-ray luminosity functionat low luminosities (Lx<10^{44.5} erg s^{-1}) and high redshifts (1

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