Hofmann,
K.-H.
Max Planck Institute for Radio Astronomy, Max Planck Society;
Schertl,
D.
Max Planck Institute for Radio Astronomy, Max Planck Society;
Beckmann,
U.
Max Planck Institute for Radio Astronomy, Max Planck Society;
Heininger,
M.
Max Planck Institute for Radio Astronomy, Max Planck Society;
Weigelt,
G.
Max Planck Institute for Radio Astronomy, Max Planck Society;