  Defects in graphene are of crucial importance for its electronic and magnetic
properties. Here impurity effects on the electronic structure of surrounding
carbon atoms are considered and the distribution of the local densities of
states (LDOS) is calculated. As the full range from near field to the
asymptotic regime is covered, our results are directly accessible by scanning
tunnelling microscopy (STM). We also include exchange scattering at magnetic
impurities and eludicate how strongly spin polarized impurity states arise.
