X-ray flux in SED modelling: An application of X-CIGALE in the XMM-XXL field G. Mountrichas, V. Buat, G. Yang, M. Boquien, D. Burgarella and L. Ciesla A&A, 646 (2021) A29 Published online: 02 February 2021 DOI: 10.1051/0004-6361/202039401