Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aj....120.2638h&link_type=abstract
The Astronomical Journal, Volume 120, Issue 5, pp. 2638-2648.
Astronomy and Astrophysics
Astronomy
8
Astrometry, Stars: Binaries: Close, Stars: Binaries: Visual, Techniques: Interferometric
Scientific paper
Speckle observations of 145 double stars and suspected double stars are presented and discussed. On the basis of multiple observations, a total of 280 position angle and separation measures are determined, as well as 23 high-quality nondetections. All observations were taken with the (unintensified) Rochester Institute of Technology fast-readout CCD camera mounted on the Lowell-Tololo 61 cm telescope at the Cerro Tololo Inter-American Observatory during 1999 October. We find that the measures, when judged as a whole against ephemeris positions of binaries with very well-known orbits, have root mean square deviations of 1.8d+/-0.3d in position angle and 13+/-2 mas in separation. Eleven double stars discovered by Hipparcos were also successfully observed, and the change in position angle and/or separation since the Hipparcos observations was substantial in three cases.
Franz Otto G.
Horch Elliott
Ninkov Zoran
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