Observational evidence for extraterrestrial gamma-ray line sources
Abstract
During the 1974 balloon flight of a high spectral resolution gamma-ray telescope, observing in the energy range of about 50 keV to 10 Mev, evidences were gathered for two cosmic sources of gamma-ray lines. These are a 73 keV line feature superimposed on a power law continuum spectrum in the 55 to 300 keV range from the Crab nebula; and a flare-like event lasting about twenty minutes, during which four intense gamma-ray lines were measured at .41, 1.79, 2.22 and 5.95 MeV. The properties and operation of the detector used are described. The measured spectrum and count rate are discussed.
- Publication:
-
Gamma Ray Spectroscopy in Astrophysics
- Pub Date:
- August 1978
- Bibcode:
- 1978grsa.rept..228J
- Keywords:
-
- Astronomical Spectroscopy;
- Cosmic Rays;
- Extraterrestrial Radiation;
- Gamma Ray Astronomy;
- Line Spectra;
- Continuous Spectra;
- Crab Nebula;
- Cryogenic Equipment;
- Gamma Ray Telescopes;
- Radiation Detectors;
- Space Radiation