Euclid SPV3 meeting

Contribution List

5. Welcome talks and presentation of the meeting

Francis Bernardeau (IPhT Saclay)

3/20/23, 2:00 PM

7. The Flagship Simulation efforts and roadmap

Micol Bolzonella, Pablo Fosalba

3/20/23, 4:30 PM

• Presentation of the Flagship Wide by P. Fosalba
• Presentation of the Flagship Deep by M. Bolzonella

4. Validation of the MontePython forecasting tools with Euclid synthetic likelihoods

Dr Santiago Casas (TTK, RWTH Aachen University)

3/21/23, 9:00 AM

CLOE, status and performances

The Galaxy Clustering Spec (GCsp) probe, reference model and performances

We expand and adjust the synthetic Euclid likelihoods of the MontePython software in order to match the exact recipes used
in previous Euclid Fisher matrix forecasts for several probes: weak lensing cosmic shear, photometric galaxy clustering, the cross-
correlation between the latter observables, and spectroscopic galaxy clustering. We also establish which precision settings are
required...

12. Using cross correlation between 2D and 3D data in Euclid

ALAIN BLANCHARD (IRAP , OMP)

3/21/23, 12:30 PM

Euclid will have the unique feature of simultaneously having 2D probes with 3*2pt but also 3D data on the same areas of the sky. In this presentation I will discuss how to use this information in a cost-effective way and the type of gain that can be forecasted.

11. A novel method to combine clustering and lensing analyses for spectroscopic and photometric samples

Stefano Camera (U. Turin)

3/21/23, 3:30 PM

I present a new technique for the measurement of the growth of cosmic structures via the power spectrum of weak lensing cosmic shear, which can be straightforwardly combined to classic bias and growth measurements from clustering. It is based on a template-fitting approach, where a redshift-dependent amplitude of lensing modulates a fixed template power spectrum. To allow for tracking the...

2. PSF modelling for SPV3

Lance Miller (Oxford University)

3/21/23, 4:50 PM

PSF tool kit, status and performances

PSF tool kit, status and performances

We describe the status of PSF modelling for SPV3, providing updates and features that may be used in multi-faceted investigations.

10. Propagating PSF errors into shear biases

Mr Casey Cragg (U. Oxford)

3/21/23, 5:10 PM

Weak Lensing End2End box, status and performances

PSF tool kit, status and performances

We are currently working on propagating expected Euclid PSF errors into shear biases for the WL E2E box as part of the SPV3 exercise. Given some base and perturbed PSFs generated using the PSF Toolkit, we numerically estimate the multiplicative and additive shear biases for galaxies in the Flagship 2 mock catalogue. We currently consider two sources of PSF error: firstly, errors in the PSF...

3. Testing the impact of scale-dependent multiplicative bias on the cosmological analysis of the 3x2pt statistics for Euclid.

Konstantinos Tanidis (University of Oxford)

3/22/23, 11:00 AM

PSF tool kit, status and performances

Weak Lensing End-2-End box, status and performances

In this work, we study the effect of spatially-varying multiplicative bias on the cosmological parameter estimation in the combined photometric analysis of the 3x2pt statistics for a Euclid DR3 end-to-end forecast. To do so, we consider a spin-0 m-bias map characterized by a Gaussian profile angular power spectrum that has been studied in the literature. Also, we proceed with a conservative...

8. OU-PHZ status and Roadmap

William Hartley

3/22/23, 3:00 PM

13. OU-SHE presentation and performances

Andy Taylor

3/22/23, 3:30 PM

9. Organisation of splinters

Francis Bernardeau (IPhT Saclay)