Institution: | (1) Sternberg Astronomical Institute, Universitetskii pr. 13, Moscow, 119992, Russia;(2) American Association of Variable Star Observers, 49 Bay State Rd., Cambridge, MA 02138, USA;(3) Saint Mary’s University, 923 Robie Str., Halifax, Nova Scotia, B3H 3C3, Canada;(4) Institute of Astronomy, Russian Academy of Sciences, Pyatnitskaya ul. 48, Moscow, 109017, Russia |