English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Context. Gravitational lensing is one of the leading tools in understandingthe dark side of the Universe. The need for accurate, efficient and effectivemethods which are able to extract this information along with othercosmological parameters from cosmic shear data is ever growing. COSEBIs,Complete Orthogonal Sets of E-/B-Integrals, is a recently developed statisticalmeasure that encompasses the complete E-/B-mode separable information containedin the shear correlation functions measured on a finite angular range. Aims.The aim of the present work is to test the properties of this newly developedstatistics for a higher-dimensional parameter space and to generalize and testit for shear tomography. Methods. We use Fisher analysis to study theeffectiveness of COSEBIs. We show our results in terms of figure-of-meritquantities, based on Fisher matrices. Results. We find that a relatively smallnumber of COSEBIs modes is always enough to saturate to the maximum informationlevel. This number is always smaller for 'logarithmic COSEBIs' than for 'linearCOSEBIs', and also depends on the number of redshift bins, the number andchoice of cosmological parameters, as well as the survey characteristics.Conclusions. COSEBIs provide a very compact way of analyzing cosmic shear data,i.e., all the E-/B-mode separable second-order statistical information in thedata is reduced to a small number of COSEBIs modes. Furthermore, with thismethod the arbitrariness in data binning is no longer an issue since theCOSEBIs modes are discrete. Finally, the small number of modes also impliesthat covariances, and their inverse, are much more conveniently obtainable,e.g., from numerical simulations, than for the shear correlation functionsthemselves.

Cosmic Shear Tomography and Efficient Data Compression using COSEBIs