Conclusions

Kochanek (1992) and Mortlock & Webster (2000) showed that several tens of lensed quasars could be discovered in galaxy surveys by examining the spectra obtained for the presence of quasar emission features. The 6dF GRS should contain at least one lens, but could yield as many as seven if quasars are typically very red (e.g.,

; c.f. Webster et al. 1995). In this latter case the survey will in fact contain several tens of lenses, but most of these would only be detectable with infrared spectroscopy.

© Copyright Astronomical Society of Australia 1997