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Pixelated Lenses and H_0 from Time-delay QSOs
Liliya L. R. Williams, Prasenjit Saha
Observed time delays between images of a lensed QSO lead to the determination of the Hubble constant by Refsdal's method, provided the mass distribution in the lensing galaxy is re…
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…
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…
On density and velocity fields and beta from the IRAS PSCz survey
Inga M. Schmoldt, Veikko Saar, Prasenjit Saha +12
We present a version of the Fourier Bessel method first introduced by Fisher et al (1994) and Zaroubi et al (1994) with two extensions: (a) we amend the formalism to allow a generi…