Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...229..753g&link_type=abstract
Astrophysical Journal, Part 1, vol. 229, Apr. 15, 1979, p. 753-761.
Astronomy and Astrophysics
Astronomy
4
Angular Distribution, Galactic Radiation, Gamma Ray Astronomy, Gamma Ray Spectra, Radiant Flux Density, Spectral Energy Distribution, Apollo Telescope Mount, Apollo 16 Flight, Crab Nebula, Galactic Nuclei, Mapping, Milky Way Galaxy, X Ray Sources
Scientific paper
The observed variation of the 72-200-keV count rate in the Apollo gamma-ray spectrometer on Apollo 16 are interpreted as being due to cosmic gamma rays associated with the Crab Nebula, Cyg X-1, and the galactic-center source. A low-resolution map is presented which shows a great enhancement in the galactic-center region; a spectrum for this region is obtained. The shape of the spectrum suggests that the emission originates from an ensemble of discrete sources. It is concluded that the gamma-ray line at 4.4 MeV is not emitted as a constant fraction of the continuum in the whole region of the galactic plane between longitudes of -50 and +22 deg.
Gilman David
Metzger Albert E.
Parker Richard H.
Trombka Jacob I.
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