X-ray Astronomy in the Laboratory with a Miniature Compact Object Produced by Laser-Driven Implosion
X-ray experiments for Space applications in intermediate energy range
X-ray interferometry with transmissive beam combiners for ultra-high angular resolution astronomy
X-ray polarimetry in Astrophysics with the Gas Pixel Detector
X-ray Polarimetry: a new window on the high energy sky
X-Ray Polarimetry: Historical Remarks and Other Considerations
X-ray variability with WFXT: AGNs, transients and more
X-shooter, the new wide band intermediate resolution spectrograph at the ESO Very Large Telescope
XIM: A virtual X-ray observatory for hydrodynamic simulations
XMASS
XMM-Newton (X-Ray Mulit-Mirror Mission) Observatory