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astro-ph1999
Cluster Reconstruction from Combined Strong and Weak Lensing
Prasenjit Saha, Liliya L. R. Williams, Hanadi AbdelSalam
The lensing information provided by multiple images, arclets, and statistical distortions can all be formulated as linear constraints on the arrival-time surface, and hence on the…
astro-ph1999
Pixellated Lenses and Estimates of H_0 from Time-delay Quasars
Liliya L. R. Williams, Prasenjit Saha
The largest source of uncertainty in the determination of H_0 from a multiply-imaged QSO system is the unknown mass distribution in the lensing galaxy. Parametric models severely r…