Spectroscopic redshifts for seven lens galaxies

@article{Ofek2006SpectroscopicRF,
  title={Spectroscopic redshifts for seven lens galaxies},
  author={Eran O. Ofek and Dan Maoz and Hans-Walter Rix and Christopher S. Kochanek and Emilio E. Falco},
  journal={The Astrophysical Journal},
  year={2006},
  volume={641},
  pages={70-77}
}
The use of gravitationally lensed quasars for cosmological applications and as probes of galaxy structure and evolution requires knowledge about the lens redshift, which is unknown for a large fraction of lenses. We report Very Large Telescope observations of 11 lensed quasars, designed to measure the redshifts of their lens galaxies. We successfully determined the redshifts for seven systems, five of which were previously unknown. The securely measured redshifts for the lensing galaxies are… 
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COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses VIII. Deconvolution of high resolution near-IR images and simple mass models for 7 gravitationally lensed quasars
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