The Sloan Lens ACS Survey. IV. The Mass Density Profile of Early-Type Galaxies out to 100 Effective Radii

@article{Gavazzi2007TheSL,
  title={The Sloan Lens ACS Survey. IV. The Mass Density Profile of Early-Type Galaxies out to 100 Effective Radii},
  author={Raphael Gavazzi and Tommaso Treu and Jason D. Rhodes and L{\'e}on V. E. Koopmans and Adam S. Bolton and Scott M. Burles and Richard J. Massey and Leonidas A. Moustakas},
  journal={The Astrophysical Journal},
  year={2007},
  volume={667},
  pages={176 - 190}
}
We present a weak-lensing analysis of 22 early-type (strong) lens galaxies, based on deep HST images obtained as part of the Sloan Lens ACS Survey. Using advanced techniques to control systematic uncertainties, we show that weak-lensing signal is detected out to ~300 h-1 kpc (at the mean lens redshift z = 0.2). We analyze blank control fields from COSMOS in the same manner, inferring that the residual systematic uncertainty in the tangential shear is less than 0.3%. A joint strong- and weak… 
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