X-ray nova in Scorpius.

X-Ray Nova XTE J1550-564: Discovery of a Quasi-periodic Oscillation near 185 HZ

X-Ray Novae, Event Horizons, and the Exponential Metric

X-ray nuclear emission of radio galaxies with Chandra

X-ray Obscured Broad-Line AGN

X-ray Obscured Broad-line AGN

X-ray Observables of South Pole Telescope SZE-selected Clusters

X-ray observation of a unique radio transient near the Galactic Center

X-ray observation of micro-failures in granular piles approaching an avalanche

X-ray observation of the Cygnus Loop with Suzaku and XMM-Newton

X-Ray Observations and the Structure of Stellar Coronae

X-ray observations as evidences of supermassive Kerr black hole

X-ray Observations Deepen Mystery of What Happens in the Cores of Galaxy Clusters

X-ray observations near the time of the outbursts

X-Ray Observations of a Galactic Jet System SS 433 with ASCA

X-Ray Observations of a New Rich Galactic Globular Cluster

X-ray observations of a TeV-emitting pulsar tail

X-ray observations of classical and recurrent novae.

X-ray Observations of Electron Heating at SNR Shocks

X-ray observations of filament eruption in the 1980 May 21 flare