Commissioning of the ATLAS Muon Trigger Selection

The performance of the three-level ATLAS muon trigger using LHC data will be presented. Events have been selected by using only the hardware-based Level-1 selections in order to commission and to subsequently enable the (software-based) selections of the High Level Trigger. Studies aiming to select prompt muons from J/Psi, bottom, charm, W and Z decays and to reduce non prompt muon contamination have been performed. A brief overview on how to evolve the muon menus with increasing luminosities will be given.