Significance Photoemission spectra reflect the many-body electronic structure of materials. The main peaks whose energies vary as a function of angle-resolved momentum usually correspond to the band structure. Replicas of these peaks, called satellites, are entirely due to interactions. Therefore, they could be used to detect the strength of electronic correlation in a material, if intrinsic features were not buried by other scattering effects. This study demonstrates how intrinsic satellites can be unraveled from measured spectra by using angular resolution and insights on the origin of nondispersing satellite contributions. Consequently, angle-resolved photoemission can be used to set an unambiguous lower bound on the strength of correlation.