Adam Amara, Thomas Kitching, Anais Rassat, Alexandre Refregier

• Amara & Refregier (2007) • weak lensing tomography

• Taylor, Kitching, Heavens, Bacon (2007) • shear ratio with BAO and SNIa priors

• Heavens, Kitching, Taylor (2007)• 3D cosmic shear with BAO and SNIa priors

• Kitching, Taylor, Heavens (2008)• The effect of systematic effects on 3D lensing dark energy constraints

• Rassat et al. (2008)• Deconstructing BAOs

• Kitching, Amara, Abdalla, Joachimi, Refregier (2008)• Submitted next week. Full characterisation of cosmological systematics

• Refregier, Amara, Kitching, Rassat (2008)• iCosmo source code description

Motivation• Dark Universe, low redshift, cosmological tools &

resources• Easy, pain-free interface• Open source• Community involvement

CMBfast, CAMB, CMBeasy

iCosmo

Source Code

• Open Source : download at www.icosmo.org• Interactive and batch modes • Online and in-code documentation• Caters for all levels: research and teaching

• Easy Syntax• IDL : large number of libraries, easy plotting

• Convenient development platform for research• Easily extendable• Coherent structure of routines and functions• Many open source IDL libraries

Source Code> fid=set_fiducial(cosmo_in={w0:-0.95})> cosmo=mk_cosmo(fid)

• In 2 lines calculated• Distances (angular, comoving, luminosity, light travel)• Hubble parameter• Growth Factor (full derivative)• Linear Power Spectrum• Non-linear power spectrum

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Source Code> sv=mk_survey(fid,’sv1’)> cl=mk_cl_tomo(fid,cosmo,sv)> cl_cov=mk_cl_tomo_cov(fid,cl,sv)

• In 3 more lines calculated• Lensing power spectrum• Covariance• Same for BAO and SNIa QuickTime™ and a

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Source Code> fid=set_fiducial(cosmo_in={w0:-0.95})> sv=mk_survey(fid,’sv1’)> fisher=mk_fisher_lens(fid,sv)

• In 3 lines can calculate• Tomography Lensing Fisher Matrix• Same for BAO and SNIa• Combining Fishers is trivial

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Interactive Web Interface

www.icosmo.org

Resources• Suite of tutorials and documents • Fully integrated with the source code and

interactive site

• Wiki pages• Continually evolving and expanding• With contributions from experts in each field

• Currently available • Gravitational Lensing (Sarah Bridle, Alan Heavens, Andy

Taylor, Benjamin Joachimi, Justin Read, Dan Kubas)

• Galaxy Correlations (Luca Amendola, Martin Kunz, Francisco Castander)

• CMB & ISW (Nabila Aghanim, Marian Doupis) • Modified Gravity (Jochen Weller, Shaun Thomas, Luca

Amendola)

Resources

www.icosmo.org

Version 1.0• Open source code• Intuitive Web Interface• Calculate : • Distances, Hubble, Growth Factor• Linear & Non-linear Power

Spectrum• Lensing Power Spectrum • BAO Distance Scales• SNIa Magnitude-distance relation• Lensing Fisher Matrix• BAO Fisher Matrix• SNIa Fisher Matrix

• Tutorials• Weak lensing• Cosmic Shear• Strong lensing• Galaxy correlations • BAO • ISW• Modified Gravity

Conclusions• Continually evolving and expanded … • How to get started• There are video tutorials continually being added, a website

guide coming out soon, and lots of help online.

• Coming Soon:• CMB & ISW• w(z) bins (new JDEM FoM)• Halo model

• Q: Can I be involved? A : Community contributions are encouraged. help@icosmo.org

www.icosmo.org

Refregier, Amara, Kitching, Rassat (2008) arXiv:0810.1285