Observations of Binary Stars with the Differential Speckle Survey Instrument. II. Hipparcos Stars Observed in 2010 January and June
Abstract
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°.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.
Additional Information
© 2011 American Astronomical Society. Received 2010 October 3; accepted 2010 November 10; published 2011 January 7. We thank the Kepler Science Office located at the NASA Ames Research Center for providing partial financial support for the upgraded DSSI instrument. It is also a pleasure to thank Dave Summers, Karen Bulter, Charles Corson, Jenny Power, Krissy Reetz, and Bill Binkert for their assistance at the telescope during our two runs at Kitt Peak, and the anonymous referee, for a thorough reading of the original manuscript. This work was funded by NSF grant AST-0908125. It made use of the Washington Double Star Catalog maintained at the U.S. Naval Observatory and the SIMBAD database, operated at CDS, Strasbourg, France.Attached Files
Published - Horch2011p12763Astron_J.pdf
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Additional details
- Eprint ID
- 22553
- Resolver ID
- CaltechAUTHORS:20110228-113612491
- NASA
- AST-0908125
- NSF
- Created
-
2011-02-28Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field
- Caltech groups
- Infrared Processing and Analysis Center (IPAC)