CALCLENS: Curved-sky grAvitational Lensing for Cosmological

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CALCLENS: Curved-sky grAvitational Lensing for Cosmological Light conE simulatioNS

Post by owlice » Fri Oct 12, 2012 7:56 am

CALCLENS: Curved-sky grAvitational Lensing for Cosmological Light conE simulatioNS

Abstract: CALCLENS, written in C and employing widely available software libraries, efficiently computes weak gravitational lensing shear signals from large N-body light cone simulations over a curved sky. The algorithm properly accounts for the sky curvature and boundary conditions, is able to produce redshift-dependent shear signals including corrections to the Born approximation by using multiple-plane ray tracing, and properly computes the lensed images of source galaxies in the light cone. The key feature of this algorithm is a new, computationally efficient Poisson solver for the sphere that combines spherical harmonic transform and multgrid methods. As a result, large areas of sky (~10,000 square degrees) can be ray traced efficiently at high-resolution using only a few hundred cores on widely available machines. Coupled with realistic galaxy populations placed in large N-body light cone simulations, CALCLENS is ideally suited for the construction of synthetic weak lensing shear catalogs to be used to test for systematic effects in data analysis procedures for upcoming large-area sky surveys.

Credit: Becker, Matthew R.

Site: https://github.com/beckermr/calclens
https://ui.adsabs.harvard.edu/abs/2013MNRAS.435..115B

Bibcode: 2012ascl.soft10010B

Preferred citation method: https://ui.adsabs.harvard.edu/abs/2013MNRAS.435..115B

ID: ascl:1210.010
Last edited by Ada Coda on Fri Aug 21, 2020 8:13 am, edited 1 time in total.
Reason: Updated code entry.
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Re: CALCLENS: Curved-sky grAvitational Lensing for Cosmologi

Post by owlice » Sat Mar 14, 2015 6:16 am

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