Identification and properties of galaxy clusters in the X-CLASS cosmological survey PhD candidate: Quentin Moysan PhD supervisors: Geneviève Soucail (IRAP), Nicolas Clerc (IRAP) Start of the thesis: 2023 Thematic group: GAHEC Date of the defense: Tuesday, November 3rd 2026, 9h30 AM President of the jury: Etienne Pointecouteau (IRAP) Reviewers: Marian Douspis (Unversité Paris-Saclay), Florian Pacaud (Université de Bonn) Examinaters: Florence Durret (IAP), Raphael Gavazzi (LAM) Location of the defense: Salle de conférence, IRAP-Roche, Toulouse