2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/12593This paper reviews the X-ray, optical, radio and IR observations of galactic X-ray binaries suspected to contain black hole compact objects, with particular emphasis on the supporting dynamical evidence.21 pages, 9 figures, to be published in "Theory of Black Hole Accretion Disks", M. Abramowicz, G. Bjornsson & J. Pringle (eds.), CUP, pages 1-21Astrophysicstext