XCALIBUR: a Vertical Takeoff TSTO RLV Concept with a HEDM Upperstage and a Scram-Rocket Booster

XMM flying beautifully

XMM telescope goes on show for the first time

XMM x-ray mirrors: metrology and optical performance

XMM's X-ray telescopes.

XMM-Newton Observation of the Complex Absorbing Medium in IRAS 13349+2438

XMM-Newton Observations of M87 in X-ray and Ultraviolet

XMM-Newton observations of M87: X-ray Jet and Halo

XMM-Newton Results on High Resolution Spectroscopy

XMM-Newton Science Analysis Software: How to Bring New Technologies to Long-life Satellite Missions

XSPEC 12: Capabilities for Coded-Mask Spectral Analysis

XUV observations of solar corona in the spirit experiment on board the coronas-F satellite

XUV wide field camera for Rosat