Abstract During the years 1987 – 1989 four new balloon experiments observed the 511 keV electron-positron annihilation line source at the Galactic Center. These observations are reviewed. The data are consistent with a two-component model, consisting of a compact and variable source plus a steady diffuse source. The compact object seems to have flared in intensity in the fall of 1988 reaching a flux level of (4–8)10−4 photons cm−2s−1.
Recent balloon observation of the Galactic Center 511 keV annihilation line
Advances in Space Research ; 11 , 8 ; 157-164
01.01.1991
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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