On the gamma-ray emission from the core of the Sagittarius dwarf galaxy
On the gamma-ray emission from the core of the Sagittarius dwarf galaxy
ABSTRACT We use Fermi-LAT data to analyse the faint gamma-ray source located at the centre of the Sagittarius (Sgr) dwarf spheroidal galaxy. In the 4FGL-DR3 catalogue, this source is associated with the globular cluster, M54. We investigate the spectral energy distribution and spatial extension of this source, with the goal …