1. Spectroscopy/Imaging; Leibniz Institute of Photonic Technology; Albert-Einstein-Str. 9 Jena D-07745 Germany
2. Institute of Physical Chemistry and Abbe Center of Photonics; Friedrich Schiller University; Helmholtzweg 4 Jena D-07743 Germany
3. Astrophysical Institute and University Observatory, AIU; Schillergäßchen 2-3 D-07745 Jena Germany