XMM-Newton, Swift and ROSAT observations of LBQS 0102-2713

XMM-NEWTON/RGS First View of Coronas of Two Luminous Cool Stars

XMM-Newton/SDSS: star formation efficiency in galaxy clusters and constraints on the matter density parameter

XMM-Newton: Passing Five Years of Successful Science Operations

XMM-Omega project : cosmological implication from the high-z L-T relation of X-ray clusters

XMM-{\em Newton} and FUSE Tentative Evidence for a WHIM filament along the Line of Sight to PKS~0558-504

XMM-{\em Newton} Observations of Optically Selected SDSS Clusters

XMMSL1 J060636.2-694933: An XMM-Newton Slew discovery and Swift/Magellan follow up of a new Classical Nova in the LMC

XMMU J0541.8-6659, a new supernova remnant in the Large Magellanic Cloud

XMMU J134736.6+173403: an eclipsing LMXB in quiescence or a peculiar AGN?

XMMU J174716.1-281048: a "quasi-persistent" very faint X-ray transient?

XO-2b: a Prograde Planet with a Negligible Eccentricity, and an Additional Radial Velocity Variation

XO-3b: A Massive Planet in an Eccentric Orbit Transiting an F5V Star

XO-4b: An Extrasolar Planet Transiting an F5V Star

XO-5b: A Transiting Jupiter-sized Planet With A Four Day Period

XO-Mass: Fundamental Astrophysical Parameters of Exoplanet Hosting Stars

xPert: Computer algebra for metric perturbation theory

XPOL - the correlation polarimeter at the IRAM 30m telescope

XPOL: a photoelectric polarimeter onboard XEUS

XRASE: the X-ray spectroscopic explorer