Leptonic origin of the 100 MeV gamma-ray emission from the Galactic Centre

Understand

The Galactic centre is a bright gamma-ray source with the GeV-TeV band spectrum composed of two distinct components in the 1-10 GeV and 1-10 TeV energy ranges.

• The nature of these two components is not clearly understood.
• We investigate the gamma-ray properties of the Galactic centre to clarify the origin of the observed emission.
• We report imaging, spectral, and timing analysis of data from 74 months of observations of the Galactic centre by FERMI/LAT gamma-ray telescope complemented by sub-MeV data from approximately ten years of INTEGRAL/PICsIT observations.