Enhancements of the Southern Pierre Auger Observatory

The southern Pierre Auger observatory in Argentina takes data routinely now, and the first physics results have been obtained and published. The successful operation of the experiment is soon going to be enhanced by the low energy extension HEAT and the muon detector system AMIGA. Both of these extensions individually have a large potential to answer further questions for example concerning the high energy galactic cosmic ray component and the transition from galactic to extragalactic cosmic rays.