CLMM: a LSST-DESC Cluster weak Lensing Mass Modeling library for cosmology

TL;DR

CLMM is an open-source Python library designed for modeling weak lensing masses of galaxy clusters, facilitating validation of analysis pipelines for upcoming cosmological surveys like LSST-DESC.

Contribution

It introduces a flexible, user-friendly toolkit for weak lensing mass modeling that integrates existing software and supports both real and mock data analysis.

Findings

Enables end-to-end validation of weak lensing mass estimates

Provides tested routines for shear signal modeling

Includes comprehensive documentation and example notebooks

Abstract

We present the v1.0 release of CLMM, an open source Python library for the estimation of the weak lensing masses of clusters of galaxies. CLMM is designed as a standalone toolkit of building blocks to enable end-to-end analysis pipeline validation for upcoming cluster cosmology analyses such as the ones that will be performed by the LSST-DESC. Its purpose is to serve as a flexible, easy-to-install and easy-to-use interface for both weak lensing simulators and observers and can be applied to real and mock data to study the systematics affecting weak lensing mass reconstruction. At the core of CLMM are routines to model the weak lensing shear signal given the underlying mass distribution of galaxy clusters and a set of data operations to prepare the corresponding data vectors. The theoretical predictions rely on existing software, used as backends in the code, that have been thoroughly tested and cross-checked. Combined, theoretical predictions and data can be used to constrain the mass distribution of galaxy clusters as demonstrated in a suite of example Jupyter Notebooks shipped with the software and also available in the extensive online documentation.