Kick off TOSCA meeting

Liste des Contributions

1. Introduction from all participants

13/04/2023 09:15

1 slide each, same format, including name/expertise/WP in which they plan to be involved. This info will be needed for the website.

2. Work Package 1: from visibilities to galaxy shapes (André Ferrari)

13/04/2023 09:45

We will build catalogues of individual galaxy shapes, which will be used as the inputs for WP2.
PhD in Nice.
Supervisor(s): André Ferrari + Simon Prunet
Collaborators: Cédric Richard, Jean-Luc Starck, Sam Farrens

3. Work Package 2 - from shapes to convergence maps (Jean-Luc Starck)

13/04/2023 10:15

We will use Deep Learning for dark matter mass map reconstruction, either from radio WP1 inputs or from an optical shape catalogue such as Euclid.
1 Postdoc working with: Jalal Fadili, Jean-Luc Starck
Collaborators: Sam Farrens and Francois Lanusse

4. Work Package 3: synergy and cosmological parameters

Valeria Pettorino (CEA Paris-Saclay, Departement of Astrophysics, CosmoStat Lab)

13/04/2023 11:15

1 Postdoc (3 yeras)
Collaborators: Martin Kunz, Martin Kilbinger

5. General questions, if any

13/04/2023 11:45

18. SKA: Overview of the Data Processing Challenges and Development of the Science Data Processor

Dr Shan Mignot (Université Côte d’Azur, CNRS, OCA, Laboratoire Lagrange)

13/04/2023 13:30

Radio-telescopes fundamentally rely on massive data processing to form observables after the radio waves have been digitized. For the SKA telescopes, the number of antennas and of frequency channels lead to considerable amounts of raw data which first need to be combined to form beams or visibilities so that temporal or spatial data reduction can be carried out to form data products that...

7. tbd (Simon Prunet)

13/04/2023 14:00

16. The ARGOS Project

Samuel Farrens (CosmoStat, CEA Paris-Saclay)

13/04/2023 14:30

In this talk I will introduce the [ARGOS][1] project, a concept for a leading-edge, low-cost, sustainable “small-D, big-N” radio interferometer to be constructed in Crete. I will provide an overview of the current plans for building the interferometer as well as explaining how ARGOS aims to bring the radio regime into the era of multi-messenger astronomy by probing the nature of transient...

17. Astronomical Image Deconvolution : From Wavelets to Deep Learning

Jean-Luc Starck (CosmoStat, CEA Paris-Saclay)

13/04/2023 15:30

We will present an overview of our recent work in the last years, in the context of astronomical image deconvolution. We will address both the case optical and radio galaxies deconvolution.

15. Weak Lensing Mass Mapping in the Context of Cosmological Inference

Francois Lanusse ({CNRS}UMR7158)

13/04/2023 16:00

In this review talk I will present the state of the art in the field of weak lensing mass-mapping, as well as discuss the important and desirable properties in the perspective of performing cosmological inference.
Specifically, I will review the most advanced mass-mapping method to date (Remy et al. 2022) which was shown to enable proper sampling of the full Bayesian posterior of the...

14. Unbiased shear estimation with forward modeling

Benjamin Remy (CEA Paris-Saclay)

13/04/2023 16:30

As the volume and quality of modern galaxy surveys increase, so does the difficulty of measuring the cosmological signal imprinted in galaxy shapes. Weak gravitational lensing sourced by the most massive structures in the Universe generates a slight shearing of galaxy morphologies called cosmic shear, key probe for cosmological models. Modern techniques of shear estimation based on statistics...

11. Benjamin Remy

10. Francois Lanusse

6. SKAO Science Data Processor (Shan Mignot)

SKA computing challenge and on-going developments

9. tbd (Jean-Luc Starck)

8. tbd (Sam Farrens)