@article {2017A\&A...598A.131K, title = {Exoplanetary atmospheric sodium revealed by orbital motion. Narrow-band transmission spectroscopy of HD 189733b with UVES}, journal = {\aap}, volume = {598}, year = {2017}, month = {feb}, pages = {A131}, keywords = {Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Solar and Stellar Astrophysics, instrumentation: spectrographs, methods: observational, planets and satellites: atmospheres, planets and satellites: individual: HD 189733b, stars: activity, techniques: spectroscopic}, doi = {10.1051/0004-6361/201629473}, author = {Khalafinejad, S. and von Essen, C. and Hoeijmakers, H.~J. and Zhou, G. and locov{\'a}, T. and Schmitt, J.~H.~M.~M. and Dreizler, S. and Lopez-Morales, M. and Husser, T. -O. and Schmidt, T.~O.~B. and Collet, R.} }