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Abstract

The results of speckle interferometric observations of 104 binary and 6 triple stars performed at the BTA 6 m telescope in 2004 October are presented. Nearby low-mass stars are mostly observed for the program, among which 59 there are new binaries recently discovered by the Hipparcos astrometric satellite. Concurrently with the diffraction-limited position measurements we obtained 154 brightness ratio measurements of binary and multiple star components in different bands of the visible spectrum. New, first-resolved binaries are the symbiotic star CH Cyg with a weak companion at 0.043″ separation and the pair of red dwarfs, GJ 913 = HIP 118212. In addition, we derived the orbital parameters for two interferometric systems: the CN-giant pair HD 210211 = HIP 109281 (P = 10.7 yr) and the G2V-K2V G2V-K2V binary GJ 9830 = HIP 116259 (P = 15.7 yr).

PACS numbers  97.80.Kq

Original Russian Text © I.I. Balega, Yu.Yu. Balega, A.F. Maksimov, E.V. Malogolovets, D.A. Rastegaev, Z.U. Shkhagosheva, G. Weigelt, 2007, published in Astrofizicheskij Byulleten, 2007, Vol. 62, No. 4, pp. 358–370.

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