Preferred model for the region-integrated γ-ray spectrum consisting of hadronic emission from a 50 kyr-old supernova remnant along with inverse Compton emission from electrons accelerated at stellar-wind termination shocks in Cygnus OB2. The top panel shows both components in red and yellow as well as emission from diffuse galactic cosmic rays in blue. Diffuse galactic cosmic rays are only shown above 300 GeV since they are included in the Fermi-LAT background model. The middle panel shows hadronic model components. The lower panel shows contributions from inverse Compton scattering on individual photon fields. The data are from ARGO-YBJ Collaboration (2014), Abeysekara et al. (2021), Abdollahi et al. (2020), and LHAASO Collaboration (2024a).