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Euclid SPV3 meeting

20–23 mars 2023
Institut d'Astrophysique de Paris
Fuseau horaire Europe/Paris

Liste des Contributions

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  1. 5. Welcome talks and presentation of the meeting
    Francis Bernardeau (IPhT Saclay)
    20/03/2023 14:00
  2. 7. The Flagship Simulation efforts and roadmap
    Micol Bolzonella, Pablo Fosalba
    20/03/2023 16:30
    • Presentation of the Flagship Wide by P. Fosalba
    • Presentation of the Flagship Deep by M. Bolzonella
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  3. 4. Validation of the MontePython forecasting tools with Euclid synthetic likelihoods
    Dr Santiago Casas (TTK, RWTH Aachen University)
    21/03/2023 09:00

    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...

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  4. 12. Using cross correlation between 2D and 3D data in Euclid
    ALAIN BLANCHARD (IRAP , OMP)
    21/03/2023 12:30

    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.

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  5. 11. A novel method to combine clustering and lensing analyses for spectroscopic and photometric samples
    Stefano Camera (U. Turin)
    21/03/2023 15:30

    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...

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  6. 2. PSF modelling for SPV3
    Lance Miller (Oxford University)
    21/03/2023 16:50
    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.

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  7. 10. Propagating PSF errors into shear biases
    M. Casey Cragg (U. Oxford)
    21/03/2023 17:10
    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...

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  8. 3. Testing the impact of scale-dependent multiplicative bias on the cosmological analysis of the 3x2pt statistics for Euclid.
    Konstantinos Tanidis (University of Oxford)
    22/03/2023 11:00
    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...

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  9. 8. OU-PHZ status and Roadmap
    William Hartley
    22/03/2023 15:00
  10. 13. OU-SHE presentation and performances
    Andy Taylor
    22/03/2023 15:30
  11. 9. Organisation of splinters
    Francis Bernardeau (IPhT Saclay)