GDR CoPhy Episode 4

Session

Wednesday Morning

3 juin 2026, 08:45

Clermont Ferrand

73. WST

Etienne Burtin (CEA-Saclay)

03/06/2026 08:45

41. Multiplexed Survey Telescope (MUST)

Eric JULLO (Aix-Marseille Université/LAM)

03/06/2026 09:15

The MUST telescope is being constructed in Lenghu, Qinghai, China. It will be equipped with a 6.5 mirror, a 7deg2 FoV and 20,000 fibre positioners. Observations are expected to start in 2030, and collect 120 millions redshift in 0.1 < z < 5.5 in 8.5 years. This project is led by the Tsinghua University in collaboration with EPFL. An international collaboration policy defines the modalities to...

53. Bayesian Inference with Differentiable Simulators for the Joint Analysis of Galaxy Clustering and CMB Lensing

Jonathan Hawla (CEA Paris-Saclay)

03/06/2026 09:45

We present our work towards a field-level inference (FLI) pipeline for the joint analysis of DESI galaxy clustering and CMB lensing from Planck and ACT. Using synthetic data, we demonstrate an end-to-end Bayesian framework that jointly samples the posterior of the initial density field, galaxy bias, and cosmological parameters (Ωₘ, σ₈).
Our differentiable forward model propagates Gaussian...