  Speckle interferometric technique is employed to record a series of hundreds
of short-exposure images of several close binary stars with sub-arcsecond
separation through a narrow band filter at the Cassegrain focus of the 2.34
meter (m) Vainu Bappu telescope (VBT), situated at Vainu Bappu Observatory
(VBO), Kavalur, India. The data are recorded sequentially by a Peltier-cooled
intensified CCD camera with 10 ms exposure. The auto-correlation method is
applied to determine the angular separations and position angles of these
binary systems.
