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Astron. Astrophys. 324, 483-484 (1997)

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Research Note

A remark on the inversion of the magnification bias in the quasar-galaxy associations

Zong-Hong Zhu 1 and Xiang-Ping Wu 2

1 Department of Astronomy, Beijing Normal University, Beijing 100875, China
2 Beijing Astronomical Observatory, Chinese Academy of Sciences, Beijing 100080, China

Received 3 January 1997 / Accepted 13 February 1997


We present an alternative but intuitive method of obtaining the true or intrinsic quasar luminosity function through the observed one in the framework of gravitational lensing. Such a so-called inversion of the magnification bias can be straightforwardly performed by means of the Mellin transformation instead of other complex methods. Application of our approach to the well-known form of the observed quasar luminosity function identifies the previous results in literature.

Key words: galaxies: general – quasars: general

Send offprint requests to: Z. H. Zhu

© European Southern Observatory (ESO) 1997

Online publication: May 26, 1998