un 2 00 1 The spectral energy distribution of Centaurus A ( NGC 5128 ) – A summary of all observations including all CGRO results – Helmut

Due to its proximity and its importance for the understanding of active galaxies and their active nuclei (AGN), Centaurus A has been observed frequently within the last 150 years in all accessible wavelength bands. Thus a wealth of data exists which has been compiled into the ”NASA Extragalactic Database” (NED). Missing from this compilation are to date almost completely the results of recent high energy observations as e.g. obtained by the Compton Gamma Ray Observatory (CGRO). A combination of those recent high energy results with all other observations in the NED enables us for the first time to establish the important spectral energy distributions (SEDs) of this closest AGN in different emission states. The combined data have been analyzed to produce SEDs which are from contemporaneous data and in addition an attempt was made to derive SEDs which are spatially resolved, i.e. SEDs from observations which can resolve nucleus and jet in Cen A are treated separately.