Institution: | 1.Main (Pulkovo) Astronomical Observatory of the Russian Academy of Sciences (RAN), 196140, Pulkovo, St. Petersburg, Russia ;2.Laboratory of Observational Astrophysics, St. Petersburg State University, St. Petersburg, Russia ;3.National Laboratory of Astrophysics, LNA/MCTI, Itazuba, Brazil ;4.Crimean Astrophysical Laboratory RAN, p. Nauchnyi, Republic of Crimea, Russia ;5.National Observatory ON/MCTI, Rio de Janeiro, Brazil ;6.Special Astrophysical Observatory RAN, p. Nizhnyii Arkhyz, Karachaevo-Cherkesskaya Respublika, Russia ;7.University of North Carolina, Dept. of Physics and Astronomy, Greensboro, USA ;8.Kourovskaya Astronomical Observatory, Urals Federal University, Ekaterinburg, Russia ; |