2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/4289This paper introduces the articles that describe detailed aspects of the XMM-Newton calibration. The unique calibration issues of XMM-Newton are highlighted. The original calibration requirements and aspects of the ground calibration are summarized. The life cycle of the in-orbit calibration observations, analysis and ingestion into calibration files is discussed.3 pages, in conference proceedings "New Visions of the X-ray Universe" - held at ESTEC, Noordwijk, The Netherlands Nov 2001Astrophysicstext