Mariusz Gromadzki (Warsaw Observatory), Lukasz Wyrzykowski (Warsaw Observatory), Juan Carlos Beamin (Univ. de Valparaiso, Millennium Institute of Astrophysics), Pawel Zielinski (Warsaw Observatory), Nada Ihanec (University of Nova Gorica), Aleksandra Hamanowicz (ESO), Kris Rybicki (Warsaw Observatory)