Institution: | Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland;Copernicus Astronomical Centre, Bartycka 18, 00-716 Warsaw, Poland;Instytut Astronomiczny, Uniwersytet Wrocławski, ul. Kopernika 11, 51-622 Wrocław, Poland;Institute of Astronomy, Russian Academy of Sciences, Pyatnitskaya Str. 48, 109017 Moscow, Russia |