OBSERVATIONS OF BINARY STARS WITH THE DIFFERENTIAL SPECKLE SURVEY INSTRUMENT. II. HIPPARCOS STARS OBSERVED IN 2010 JANUARY AND JUNE
- Department of Physics, Southern Connecticut State University, 501 Crescent Street, New Haven, CT 06515 (United States)
- National Optical Astronomy Observatories, 950 North Cherry Avenue, Tucson, AZ 87719 (United States)
- NASA Exoplanet Science Institute, California Institute of Technology, 770 South Wilson Avenue, Mail Code 100-22, Pasadena, CA 91125 (United States)
The results of 497 speckle observations of Hipparcos stars and selected other targets are presented. Of these, 367 were resolved into components and 130 were unresolved. The data were obtained using the Differential Speckle Survey Instrument at the WIYN 3.5 m Telescope. (The WIYN Observatory is a joint facility of the University of Wisconsin-Madison, Indiana University, Yale University, and the National Optical Astronomy Observatories.) Since the first paper in this series, the instrument has been upgraded so that it now uses two electron-multiplying CCD cameras. The measurement precision obtained when comparing to ephemeris positions of binaries with very well known orbits is approximately 1-2 mas in separation and better than 0.{sup 0}6 in position angle. Differential photometry is found to be in very good agreement with Hipparcos measures in cases where the comparison is most relevant. We derive preliminary orbits for two systems.
- OSTI ID:
- 21583253
- Journal Information:
- Astronomical Journal (New York, N.Y. Online), Vol. 141, Issue 2; Other Information: DOI: 10.1088/0004-6256/141/2/45; ISSN 1538-3881
- Country of Publication:
- United States
- Language:
- English
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