Observations of high-energy X-rays from Sagittarius.
High energy X ray observational data for Sagittarius sources scanned by active telescope during February 1968 balloon flight
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High energy X ray observational data for Sagittarius sources scanned by active telescope during February 1968 balloon flight
Galactic X ray source spectral data observed by rocket, presenting graph with corrections
Interstellar absorption of 10 A X rays from sources in Scorpio-Sagittarius region, noting gas density between earth and Crab Nebula
X ray source from Coma cluster of galaxies, interpreting observed flux on basis of missing mass suggested by Virial theorem
Cosmic rays and cosmic X rays, considering galactic and extragalactic sources, diffuse background, detection devices, etc
X and gamma ray astronomy instrumentation, point sources, continuum emission, line spectra, etc
Plates with identical patterns of precisely aligned pinholes constitute lens system which, when rotated about optical axis, produces continuous high resolution image of small energy X-ray or gamma ray source. Camera has applications in radiation treatment and nuclear medicine.
Hard X ray experiment for Astronomical Netherlands Satellite to detect and measure X ray sources and line emission
Statistical analysis of X ray line emission from cosmic radiation source
X ray background angular structure comparison with optical galaxies spatial distribution, ruling out universe models with sources following cosmological mass distribution
Balloon-borne observation of X ray sources in northern sky, including Sco, Cyg and SN 1572
X ray sources identification and position measurements near galactic center on basis of rocket experiments
X ray observations of NP0532 and other radio pulsars and galactic X ray sources
X ray spectrum measurement of Scorpius X-1 by Bragg spectrometer, explaining emission or absorption absence by source model with line weakened by electron scattering
Line emission in diffuse cosmic X ray continuum, discussing probable interstellar or intergalactic matter source
Large amplitude periodic X ray pulsations from Centaurus X-3, observing abrupt source intensity and pulse rate changes
X ray sources pulsation limits and locations determination by rocket-borne rotating modulation collimator
A discussion is given of the relaxation of power-law cosmic-ray spectra in the intergalactic medium. The theoretical time-dependent spectra obtained are used to calculate the nonthermal radiation produced by bremsstrahlung of subcosmic-ray electrons colliding with ambient protons of the intergalactic gas. A comparison is made between the theory and the observations of the diffuse X-ray and gamma-ray background. The calculated cosmic-ray proton spectra are applied to a computation of the heating of the intergalactic medium, and the resulting thermal bremsstrahlung radiation is compared with the suprathermal proton bremsstrahlung flux. We conclude that nonthermal bremsstrahlung is unlikely to be an important contributor to the isotropic X- and gamma-ray background. However, cosmic-ray heating can provide a plausible heat source for maintaining a hot intergalactic gas, especially when evolutionary effects are included in the distribution of cosmic-ray sources.