X-Ray and Optical Flux Ratio Anomalies in Quadruply Lensed Quasars

X-Ray and Optical Flux Ratio Anomalies in Quadruply Lensed Quasars: Zooming in on Quasar Emission Regions

X-ray and optical follow-up of ASAS 150946-2147.7

X-Ray and Optical Imagery of the SN 1006 Supernova Remnant

X-Ray and Optical Imagery of the SN 1006 Supernova Remnant

X-ray and optical measurements of the cataclysmic variable CH UMa

X-ray and Optical Measurements of the Cataclysmic Variable CH UMa

X-ray and Optical Number Counts of AGN in the GOODS Fields

X-ray and Optical Observation of cD Galaxies in Poor Clusters

X-ray and optical observations of 3U0900-40 (Vela X-1)

X-ray and Optical Observations of 4U2129+47=V1727Cyg in a Low State

X-ray and optical observations of a dMe flare star in the T Tauri field

X-ray and optical observations of a new X-ray soft intermediate polar: RX J0512.2-3241.

X-ray and Optical Observations of A2163, an Exceptionally Massive Galaxy Cluster

X-Ray and Optical Observations of BL Hydri

X-ray and Optical Observations of Four X-ray Selected BL Lac Objects

X-ray and optical observations of LDS 587

X-ray and optical observations of MCG-6-30-15

X-ray and optical observations of SCO X-I

X-ray and Optical Observations of the Black Hole Candidate XTE J1550-564