Uroš Seljak

TL;DR: In this article, the authors used the extended Press-Schechter formalism to show that the scale dependent bias of fNL will depend on other properties, such as the merging history of halos.

TL;DR: In this paper, the authors present a review of current and emerging shear-measurement methods in a common language, and assess their performance by running them (blindly) on simulated images that contain a known shear signal.

TL;DR: This work proposes an alternative method based on the fact that on large scales, halos are linearly biased, but not stochastic, tracers of dark matter: by correlating a highly biased tracer of large scale structure against an unbiased tracer, one eliminates the cosmic variance error.

TL;DR: In this article, the authors investigate biases induced by the conversion between the observed image shape and shear distortion in current weak-lensing analysis methods and find that the non-Gaussianity of the point spread function has a significant effect and can lead to an error of up to 15 per cent on the linear amplitude of fluctuations σ 8, depending on the method of analysis.

TL;DR: In this article, a geometric test for weak lensing signal-to-noise ratio at the 1 per cent level is proposed to constrain shear calibration biases and other systematics in the SDSS survey data.