Image
The measured and predicted levels of the galactic diffuse emission within the Cygnus region. The red bars indicate the measurements made by EGRET and the black cross shows the measurement made with Milagro. The prediction is based on the "conventional" model of GALPROP (Strong et al. 2004), which uses the cosmic-ray spectrum and intensity measured at the Earth as the basis for the entire galaxy. The red curve is the contribution from cosmic-ray protons interacting with matter, the green curve is the contribution from high-energy electrons interacting with radiation in the galaxy and the light-blue curve is the contribution from high-energy electron bremsstrahlung. The dark-blue curve is the sum of the these contributions.