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All-Sky Map of 511 keV Line Emission
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All-Sky Map of 511 keV Line Emission

January 7, 2013
Sky map of the 511 keV gamma-ray line emission produced by electron-positron annihilation. The map is based on data that covers approximately 95% of the celestial sphere and was obtained with the SPI spectrometer. Contour levels indicate intensity levels of 10-2, 10-3, and 10-4 photons cm-2 s-1 sr-1 (from the centre outwards). The image is given in Galactic coordinates, with the Galactic Centre in the middle of the image. The emission is clearly centred on the Galaxy's central region. Date: 16 Oct 2007 Satellite: INTEGRAL Depicts: Sky map of 511 keV electron-positron annihiliation emission line Copyright: J. Knödlseder et al.