Double star speckle measures

Of these, 32 are high-quality nondetections, meaning that, if binary, the system had a separation below the diffraction limit at the time of the observation, and relative astrometry is presented for the remaining 517 observations. In addition, a magnitude difference measure is reported in 312 cases in which the observation was judged to be of sufficient quality to have little decorrelation of the speckle pattern of the secondary relative to the primary star.

These data were obtained from speckle observations taken at the Lowell-Tololo 0.6m telescope at Cerro Tololo Inter-American Observatory using a fast-readout CCD detector during 2001 November.