X-waves Generated at Second Harmonic
XAO coronagraphy with the High-Order Test bench
Xenia: cosmo-chemical evolution of the Universe
XEUS mission reference design
XEUS: The x-ray evolving universe spectroscopy mission
XEUS: X-ray Evolving Universe Spectroscopy
Xinetics low-cost deformable mirrors with actuator replacement cartridges
XMM flight-mirror-modules environmental and optical testing
XMM space telescope: development plan for the lightweight replicated x-ray gratings
XSPECT telescopes on the SRG: optical performance
XUV digital in-line holography using high-order harmonics
XUV Doppler telescope with multilayer optics
XUV optical characterization of thin film and multilayer reflectors
XUV wide field camera for ROSAT.