2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/15053The paper reports the analysis of a very deep ROSAT HRI observation of the distant lensing cluster, CL0024+17. The morphology of the cluster is studied and the small core radius inferred from lensing analysis is confirmed. Constraints on the mass distribution are discussed.8 pages, 4 figures, Astronomy & Astrophysics in pressAstrophysicstext