X-ray spectral variability in the ultraluminous X-ray source Holmberg IX X-1

X-ray spectroscopy of Abell S1101 with Chandra, XMM-Newton and ROSAT: band-pass dependence of he temperature profile and soft excess emission

X-ray Spectroscopy of Galactic Hot Gas along the PKS 2155-304 Sight Line

X-ray Spectroscopy of MXB 1728-34 with XMM-Newton

X-ray Spectroscopy of the Core of the Perseus Cluster with Suzaku: Elemental Abundances in the Intracluster Medium

X-Ray Spectrum of a Peculiar Supernova Remnant G359.1-0.5

X-ray Stripes in Tycho's Supernova Remant: Synchrotron Footprints of a Nonlinear Cosmic Ray-driven Instability

X-Ray Studies of HESS J1809-193 with Suzaku

X-ray Studies of Planetary Systems: An Astro2010 Decadal Survey White Paper

X-ray study of HLX1: intermediate-mass black hole or foreground neutron star?

X-ray Study of Rekindled Accretion in the Classical Nova V2491 Cygni

X-ray Time Lags in TeV Blazars

X-ray Timing of Neutron Stars, Astrophysical Probes of Extreme Physics

X-ray Timing of Stellar Mass Black Holes

X-ray Variability and Evidence for Pulsations from the Unique Radio Pulsar/X-ray Binary Transition Object FIRST J102347.6+003841

X-ray Variability and Hardness of ESO 243-49 HLX-1: Clear Evidence for Spectral State Transitions

X-Ray Variability of AGN and Relationship to Galactic Black Hole Binary Systems

X-ray variability patterns and radio/X-ray correlations in Cyg X-1

X-ray variability patterns in blazars

X-ray variation statistics and wind clumping in Vela X-1