Gamma-ray lines and continuum radiation from the galactic center direction

Details Gamma-ray lines and continuum radiation from the galactic center direction Gamma-ray lines and continuum radiation from the galactic center direction

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...240..338l&link_type=abstract

Astrophysical Journal, Part 1, vol. 240, Aug. 15, 1980, p. 338-343. Research supported by the U.S. Department of Energy.

Astronomy and Astrophysics

Astronomy

44

Galactic Nuclei, Galactic Radiation, Gamma Ray Astronomy, Gamma Ray Spectra, Line Spectra, Milky Way Galaxy, Balloon-Borne Instruments, Continuous Radiation, Galactic Structure, Gamma Ray Telescopes, Radiant Flux Density, X Ray Sources

Scientific paper

A balloon-borne germanium gamma-ray telescope has been reflown over Alice Springs, Australia. The detection of a sharp 511 keV electron-positron annihilation line from the galactic center (GC) direction has been confirmed at a flux level compatible with a previous result. No evidence for several other candidate lines was found, indicating that they were statistical fluctuations in the previous data. Evidence for a significant change in the GC inverse power-law continuum has been obtained, suggesting that its origin lies in the many unresolved and highly variable pointlike X-ray sources in the field of view.

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