Fabien Lacasa

Fabien Lacasa is a cosmology researcher affiliated with the Université Libre de Bruxelles as a postdoctoral researcher funded by BELSPO (ESA, Euclid). He holds a dual role as Maître assistant at the University of Geneva and chercheur associé at the Institut d'Astrophysique Spatiale (Université Paris-Saclay). His career spans multiple institutions including ICTP-SAIFR, University of Padova, and involvement in major missions like Planck, Dark Energy Survey, and Euclid.

• Past Affiliations: PhD at Institut d'Astrophysique Spatiale (2010-2013), Postdoc at ICTP-SAIFR (2013-2016), University of Geneva (2016-2019, 2021-2022), CNES postdoc (2019-2020), INFN postdoc (2022-2023)

His research focuses on non-linear effects in cosmic structure formation, analyzing Large Scale Structure (LSS), Cosmic Microwave Background (CMB), and their interplay. Key contributions include modeling super-sample covariance (Lacasa & Grain 2018), bispectrum analysis for primordial non-Gaussianity, and developing methodologies for multi-probe cosmological constraints.

He actively shares computational tools through GitHub repositories like IDL-fablib (CMB analysis routines) and PySSC (super-sample covariance implementation with comprehensive documentation). Data and analysis notebooks for his publications are openly available to ensure reproducibility.