This is the public information on the ATLAS cluster operated by the Max Planck Institute for Gravitational Physics (also named Albert Einstein Insititute, AEI) situated in Potsdam and Han(n)over. The hardware itself is installed in Hannover.
For the future, we strive to make the user information available under https://www.atlas.aei.uni-hannover.de/userdoc/ while keeping nowadays mostly outdated information in this wiki.