Blast.jl: Differentiable Non-Limber Power Spectra for Joint Clustering, Shear, and CMB lensing Analyses

arXiv:2609.01855 · astro-ph.CO, astro-ph.IM · Submitted 2026-09-01 · Read on arXiv

astro-ph.CO, astro-ph.IM

Submitted: 2026-09-01

Updated: 2026-09-01

Code: https://github.com/sofiachiarenza/Blast.jl

Project page: https://mlcolab.github.io/Pathfinder.jl/stable

Terminology

• Clustering — 23× in this paper · explained in 2 episodes
• Alignment — 15× in this paper · explained in 1 episode
• Accuracy — 12× in this paper · explained in 1 episode
• Non-Gaussianity — 11× in this paper · explained in 2 episodes
• Benchmark — 9× in this paper · explained in 2 episodes
• Primordial non-Gaussianity — 9× in this paper · explained in 2 episodes
• Weak Lensing — 8× in this paper · explained in 2 episodes
• Matter Power Spectrum — 7× in this paper · explained in 2 episodes
• Core — 3× in this paper · explained in 2 episodes
• Adaptation — 2× in this paper · explained in 1 episode
• Fidelity — 2× in this paper · explained in 2 episodes
• Generalization — 2× in this paper · explained in 13 episodes
• Robustness — 2× in this paper · explained in 5 episodes
• Chebyshev Polynomials — 1× in this paper · explained in 2 episodes
• Consistency — 1× in this paper · explained in 3 episodes
• Core Cosmology Library — 1× in this paper
• Dark Energy Spectroscopic Instrument — 1× in this paper
• Distribution Shift — 1× in this paper · explained in 5 episodes
• Gravitational Lensing — 1× in this paper · explained in 2 episodes
• Legacy Survey of Space and Time — 1× in this paper
• Modular Architecture — 1× in this paper · explained in 4 episodes
• No-U-Turn Sampler — 1× in this paper
• Redshift-Space Distortions (RSD) — 1× in this paper · explained in 2 episodes
• Trace — 1× in this paper · explained in 2 episodes
• Verification — 1× in this paper · explained in 2 episodes

Sources

• Dark Energy Survey Year 6 Results: Cosmological Constraints from Cosmic Shear
• The DESI Experiment Part I: Science,Targeting, and Survey Design
• Capse.jl: efficient and auto-differentiable CMB power spectra emulation
• Alleviating prior dependencies for DESI DR1 clustering fits through reparameterization
• cloelib: A Flexible Python Library for Computing Cosmological Observables in the Euclid Era
• JAX-COSMO: An End-to-End Differentiable and GPU Accelerated Cosmology Library
• Constraining primordial non-Gaussianity from DESI DR1 quasars and Planck PR4 CMB Lensing
• Flinch: A Differentiable Framework for Field-Level Inference of Cosmological parameters from curved sky data
• Cosmology with the SPHEREX All-Sky Spectral Survey
• Euclid preparation. Review of forecast constraints on dark energy and modified gravity
• The Status of Single Scalar Field Dark Energy
• The N5K Challenge: Non-Limber Integration for LSST Cosmology
• The Cosmic Linear Anisotropy Solving System (CLASS) I: Overview
• Almanac: Weak Lensing power spectra and map inference on the masked sphere
• The LSST Dark Energy Science Collaboration (DESC) Science Requirements Document
• Frequentist Cosmological Constraints from Full-Shape Clustering Measurements in DESI DR1
• Euclid preparation: 6x2 pt analysis of Euclid's spectroscopic and photometric data sets
• CosmoPower-JAX: high-dimensional Bayesian inference with differentiable cosmological emulators
• pylevin: Efficient numerical integration of integrals containing up to three Bessel functions
• LimberJack.jl: auto-differentiable methods for angular power spectra analyses

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