1. Konkoly Observatory, MTA CSFK, Konkoly Thege Miklós út 15-17, H-1121 Budapest, Hungary
2. MTA CSFK Lendület Near-Field Cosmology Research Group
3. Department of Experimental Physics and Astronomical Observatory, University of Szeged, H-6720 Szeged, Hungary
4. Savaria Department of Physics, Eötvös Loránd University, H-9700 Szombathely, Hungary