The galactic gamma-ray flux in the 0.06 - 5 MeV range.
Abstract
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.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- April 1979
- DOI:
- 10.1086/157011
- Bibcode:
- 1979ApJ...229..753G
- Keywords:
-
- 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;
- Space Radiation;
- Galaxy:Gamma Rays;
- Gamma Rays:Spectra