The 2 dF QSO Redshift Survey-X . Lensing of Background QSOs by Galaxy Groups .

Abstract

We cross-correlate QSOs from the 2dF QSO Redshift Survey with groups of galaxies. In the southern region of the 2dF we utilise galaxies from the APM Survey. In the northern strip, galaxies are taken from the recent Sloan Digital Sky Survey Early Data Release. Both galaxy samples are limited to a depth B < 20.5. We use an objective clustering algorithm to… (More)

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