Speckle Interferometry of Southern Double Stars. II. Measures from the CASLEO 2.15 Meter Telescope, 1995-1996

Relative astrometry is presented for 198 observations of 160 double stars. The data were obtained at the 2.15 m telescope at the Complejo Astronomico El Leoncito (Argentina) with a multianode microchannel array (MAMA) detector system. Five high-quality nondetections are also reported. When judged against ephemeris positions for binaries with very well determined orbits, the separation residuals exhibit a root mean square deviation of 13.2 mas and the position angle residuals exhibit rms deviation of 29. Factors affecting the measurement precision are discussed.