2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/4295We show the XMM-Newton guaranted time observations of 2 clusters of galaxies in a different stage of merger.4 pages, LaTex, 9 figures. To appear in the Proceedings of the Conference "New Visions of the X-ray Universe in the XMM-Newton and Chandra era" -ESTEC - Noordwijk, The Netherlands, Nov 2001Astrophysicstext