Name: GDR CoPhy Episode 4
Start: 2026-06-01T13:30:00+02:00
End: 2026-06-03T14:30:00+02:00
Location: Clermont Ferrand

GDR CoPhy Episode 4

from Monday, June 1, 2026 (1:30 PM) to Wednesday, June 3, 2026 (2:30 PM)

Monday, June 1, 2026

1:30 PM Registration and Welcoming Time

1:30 PM - 2:00 PM
2:00 PM Monday afternoon: BLOCK 1
BLOCK 1
2:00 PM - 4:00 PM
Contributions

2:00 PM welcome - Jean Orloff

2:10 PM Introduction to the GDR COPHY episode 4 - Johann COHEN-TANUGI (LPCA, Université Clermont-Auvergne & CNRS)

2:20 PM GDR COPHY Status report - Josquin Errard

2:30 PM WG TUG - Vivian POULIN (LUPM, CNRS & U. de Montpellier, France)

2:50 PM Cosmology with strong lensing images - Julien Larena (LUPM, Université de Montpellier)

3:20 PM Gravitational lensing beyond approximations: relativistic lightcones for modern cosmological surveys - Laurent MAGRI--STELLA (LAPP)

3:50 PM Cosmology within the GdR Gravitational waves - Michele Mancarella (Centre de Physique Théorique (CPT))
4:00 PM Coffee Break
Coffee Break
4:00 PM - 4:30 PM
4:30 PM Monday afternoon: BLOCK 2
BLOCK 2
4:30 PM - 6:30 PM
Contributions

4:30 PM Rubin-LSST : status and plans - Thibault Guillemin (LAPP)

5:00 PM The cosmic matter dipole problem - Albert Bonnefous-Abiven (Institut d'Astrophysique de Paris)

5:30 PM An inhomogeneous cosmological model: the axially symmetric Szekeres GR solution - Marie-Noëlle Celerier (Observatoire de Paris)

6:00 PM WG ADE - Alain Blanchard
7:30 PM Cocktail dinatoire

7:30 PM - 11:15 PM
Tuesday, June 2, 2026
8:40 AM Tuesday Morning: BLOCK 1
BLOCK 1
8:40 AM - 10:20 AM
Contributions

8:45 AM WG CMB - Matthieu Tristram (IJClab, CNRS, France)

9:00 AM LiteBIRD - Léo Vacher (IJCLab)

9:20 AM The Simons Observatory: Early Data from the Small Aperture Telescopes - Amalia VILLARRUBIA AGUILAR (APC CNRS / UPC)

9:50 AM KAIROS : Proposal for a French SAT observing at high frequencies - Benjamin BERINGUE (APC - CNRS)
10:20 AM Coffee Break
Coffee Break
10:20 AM - 10:50 AM
10:50 AM Tuesday Morning: BLOCK 2
BLOCK 2
10:50 AM - 12:20 PM
Contributions

10:50 AM Testing Entropic Explanations of Cosmic Acceleration with DESI and Supernovae - Soumen Basak (IISER Thiruvananthapuram, Kerala, India)

11:20 AM The Secret Life of Voids: Unifying Density Profiles and their Evolution - Nico SCHUSTER (CPPM)

11:50 AM How to measure cosmology from nothing: void-galaxy cross-correlation with DESI - Katayoon GHAEMI (Centre de Physique des Particules de Marseille (CPPM))
12:20 PM Déjeuner au restaurant LA PLACE

12:20 PM - 2:00 PM
2:00 PM Tuesday Afternoon: BLOCK 1
BLOCK 1
2:00 PM - 4:00 PM
Contributions

2:00 PM Simons Observatory LAT status - Merry Duparc (ijclab)

2:30 PM SPT-3G: latest results and future prospects - Lennart Balkenhol

3:00 PM The shape of emptiness: improving the signal from cosmic voids using reconstruction - Giulia DEGNI (CPPM - AMU)

3:30 PM Cosmology from the Rubin Void Size Function - Pierre BOCCARD (CPPM)
4:00 PM Coffee Break
Coffee Break
4:00 PM - 4:30 PM
4:30 PM Tuesday Afternoon: BLOCK 2
BLOCK 2
4:30 PM - 6:20 PM
Contributions

4:30 PM The Lazuli Space Telescope and its use for Cosmology - Mickael RIGAULT (CNRS/IP2I)

5:00 PM No supernovae? Measuring H₀ from Cepheids, TRGB stars, and masers with BORG peculiar velocities - Richard Stiskalek (Oxford University)

5:30 PM Future missions for CMB spectral distortion measurements - Xavier Coulon (IAS-CNRS)

6:00 PM WG TOOLS - Guilhem LAVAUX (IAP, CNRS INSU)
Wednesday, June 3, 2026
8:45 AM Wednesday Morning: BLOCK 1
BLOCK 1
8:45 AM - 10:15 AM
Contributions

8:45 AM WST - Etienne Burtin (CEA-Saclay)

9:15 AM Multiplexed Survey Telescope (MUST) - Eric JULLO (Aix-Marseille Université/LAM)

9:45 AM Bayesian Inference with Differentiable Simulators for the Joint Analysis of Galaxy Clustering and CMB Lensing - Jonathan Hawla (CEA Paris-Saclay)
10:15 AM Coffee Break
Coffee Break
10:15 AM - 10:45 AM
10:45 AM Wednesday Morning: BLOCK 2
BLOCK 2
10:45 AM - 12:15 PM
Contributions

10:45 AM Multi-probe inferences of late-time cosmic dynamics from Stage-III to Stage-V surveys - Eleni Tsaprazi (Imperial College London)

11:15 AM Overview of DESI and its recent results - Domitille Chebat (CEA Saclay - IRFU - DPhP)

11:45 AM Simulation-Based Inference (SBI) for cosmology with type Ia Supernovae (SNe Ia). - Adam TRIGUI (IP2I)

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