X-ray versus Optical Observations of Active Galactic Nuclei: Evidence for Large Grains?

X-ray view of IC348 in the light of an updated cluster census

X-Ray View of the Shock Front in the Merging Cluster Abell 3376 with Suzaku

X-ray views of neutron star low-mass X-ray binaries

X-ray VS He II lambda 1640 A correlation of II Peg

X-ray vs. Optical Variations in the Seyfert 1 Nucleus NGC 3516: A Puzzling Disconnectedness

X-ray vs. water maser emission in AGN

X-ray Wakes as Probes of Galaxy Cluster Dynamics

X-ray warm absorption and emission in the polar scattered Seyfert 1 galaxy MRK 704

X-Ray Wind Tomography of the highly absorbed HMXB IGR J17252-3616

X-ray, EUV, UV and Optical Emissivities of Asrophysical Plasmas

X-Ray, FUV, and UV Observations of alpha Centauri B: Determination of Long-term Magnetic Activity Cycle and Rotation Period

X-ray, H-alpha and radio observational study of the 4N/X2.3 flare of 1981 April 1

X-ray, H-alpha and radio observational study of the 4N/X2.3 flare of 1981 April 1

X-ray, lensing and Sunyaev Zel'dovich triaxial analysis of Abell 1835 out to R_{200}

X-ray, Ly-alpha and H-alpha Emission from Simulated Disk Galaxies

X-ray, Optical and Infrared Observations of GX 339-4 During Its 2011 Decay

X-ray, optical and IR follow-up observations of GRBs

X-ray, optical and radio study of radio-loud quasars.

X-ray, Optical, and Infrared Imaging and Spectral Properties of the 1 Ms Chandra Deep Field North Sources