EPJ manuscript No. (will be inserted by the editor) Electromagnetic Excitation of Nucleon Resonances

Abstract. Recent progress on the extraction of electromagnetic proper-ties of nucleon resonance excitation through pion photo- and electropro-duction is reviewed. Cross section data measured at MAMI, ELSA, and CEBAF are analyzed and compared to the analysis of other groups. On this basis, we derive longitudinal and transverse transition form factors for most of the four-star nucleon resonances. Furthermore, we discuss how the transition form factors can be used to obtain empirical trans-verse charge densities. Contour plots of the thus derived densities are shown for the Delta, Roper, S11, and D13 nucleon resonances.