X-ray, Optical, and Radio Monitoring of Gamma-Ray Blazars
X-ray, Optical, and Radio Observations of the Type II Supernovae 1999em and 1998S
X-ray, optical, and radio properties of quasars
X-ray, Radio, and Optical Observations of the Putative Pulsar in the Supernova Remnant CTA 1
X-ray, ultraviolet and optical monitoring of the X-ray/Be transient system A 0535+26/HDE 245770
X-ray, ultraviolet, and optical observations of the intermediate polar FO Aquarii (H2215-086)
X-Ray, UV, and Optical Observations of Supernova 2006bp with Swift: Detection of Early X-Ray Emission
X-ray-emitting Atmospheres of B2 Radio Galaxies
X-ray-emitting filaments in the cooling flow cluster A2029
X-ray-emitting gas surrounding the spiral galaxy NGC 891
X-Ray-Emitting Stars Identified from the ROSAT All-Sky Survey and the Sloan Digital Sky Survey
X-ray-illuminated stellar winds - Optically thick wind models for massive X-ray binaries
X-ray-induced chemistry of interstellar clouds.
X-ray-selected AGNs near bright galaxies
X-ray-selected M dwarfs and the diffuse X-ray background
X-Ray/Gamma-Ray Observations of the PSR B1259-63/SS 2883 system near Apastron
X-ray/microwave ratio of flares and coronae
X-ray/Optical analysis of the cluster of galaxies Abell 1300: Indications of a post-merger at z = 0.31
X-ray/optical brightness trends in 3C 66A
X-ray/Optical Bursts from GS 1826-24