P oS(DIS 2010)241 Review of DVCS results at HERMES

We report an overview of results for the deeply virtual Compton scattering process measured with the HERMES experiment at DESY, Hamburg. These measurements are exploiting the rich data set collected with the longitudinally polarized 27.6 GeV HERA lepton beams of both charges and spin orientations scattered off longitudinally or transversely polarized or unpolarized gas targets (H, D or heavier nuclei). The Fourier amplitudes of various azimuthal asymmetries are extracted from this data. These amplitudes are sensitive to the imaginary or real part of certain Compton form factors, therefore generalized parton distributions, or their linear combinations