2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/11518Vela X-1 has been observed by the Italian/Dutch X-ray satellite BeppoSAX during its Science Verification Phase. During the ~ 50 ksec observation (orbital phases 0.27-0.34) two different intensity state are present, situation very common in this source. We report results from the pulse phase averaged and pulse phase resolved spectroscopy from the high-energy instrument PDS aboard BeppoSAX.4 pages, 2 figures. It uses camera.sty (included). To appear in the Proceedings of "The Cosmic Physics of 2000"Astrophysicstext