2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/164400Comments to the review "Nonthermal Phenomena in Clusters of Galaxies" by Y.Rephaeli et al. (arXiv:0801.0982 [astro-ph]) that regard the presence of a hard X-ray excess in the Coma cluster, A2199, A2163 and the Bullet cluster.3 pagesAstrophysicsComments to the review "Nonthermal phenomena in clusters of galaxies" by Y.Rephaeli et al. that will appear on the book: Clusters of galaxies: beyond the thermal viewtext