1. HUN-REN-ELTE Exoplanet Research Group , 9700 Szombathely, Szent Imre h. u. 112 , Hungary
2. ELTE Gothard Astrophysical Observatory , 9700 Szombathely, Szent Imre h. u. 112 , Hungary
3. Astronomical Institute, Slovak Academy of Sciences , 05960 Tatranská Lomnica , Slovakia