X-ray galaxy clusters in the large-scale structure
X-ray Line Emission from Accretion Disk Atmospheres
X-ray lines and absorption edges in GRBS and their afterglows
X-ray Lines in Gamma-ray Bursts and Cerenkov Line Emissions
X-Ray Luminosity--Mass Relation and AGN Feedback in Galaxy Groups
X-ray Luminous Groups in the Process of Formation
X-ray Mass Proxies From Hydrodynamic Simulations Of Galaxy Clusters
X-ray microanalysis of fluid inclusions and its application to the geochemical modeling of evaporite basins
X-Ray Multimodality in A2151
X-ray observations of black-hole accretion disks
X-ray observations of soft gamma-ray repeaters
X-ray Observations of the Warm-Hot Intergalactic Medium
X-ray optics - Developments in the CSFR
X-ray Properties Across the Spiral Morphology
X-ray properties of Luminous Compact Blue Galaxies in the GOODS-N Area
X-ray redshifts with the International X-ray Observatory (IXO)
X-ray selected quasars and Seyfert galaxies - Cosmological evolution, luminosity function, and contribution to the X-ray background
X-ray source counts at high galactic latitude from measurements of fluctuations in the X-ray background
X-ray Source Populations in M31
X-ray Spectral Analysis of Dim Type Ia Supernova Remnant Candidates in the Small Magellanic Cloud