2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/146967OB stars with strong radiation-driven stellar winds and large-scale magnetic fields generate strong and hard X-ray emission via the Magnetically Channeled Wind Shock (MCWS) mechanism. In this brief paper, I describe four separate X-ray diagnostics of the MCWS mechanism in OB stars, with applications to the prototype young O star, theta-1 Ori C.2 pages; 1 figure (color, but looks fine in b/w). To appear as part of an article on the specialist session on magnetic massive stars held prior to IAU Symposium 250, "Massive Stars as Cosmic Engines," Kauai, HI, December 2007; eds. Bresolin, Crowther, & Puls, Cambridge University Press, 2008Astrophysicstext