Computer Science
Sound
Scientist
Columbia University, New York, N.Y.
An upper limit to an X-ray point source at the center of the Cygnus Loop
Measurement of the Spatial Structure of the X-Ray Emission of the Cygnus Loop
One-dimensional focusing X-ray telescope for stellar X-ray astronomy
The energy spectrum of the Perseus cluster of galaxies
X-ray morphology of the Perseus cluster
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