Access

You are not currently logged in.

Access JSTOR through your library or other institution:

login

Log in through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Journal Article

THE MCDONALD OBSERVATORY 2.1-m RADIAL VELOCITY SPECTROMETER

M. H. SLOVAK, G. W. VAN CITTERS and T. G. BARNES III
Publications of the Astronomical Society of the Pacific
Vol. 91, No. 544 (December 1979), pp. 840-847
Stable URL: http://www.jstor.org/stable/40677617
Page Count: 8
Were these topics helpful?
See something inaccurate? Let us know!

Select the topics that are inaccurate.

  • Read Online (Free)
  • Subscribe ($19.50)
  • Add to My Lists
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
THE MCDONALD OBSERVATORY 2.1-m RADIAL VELOCITY SPECTROMETER
Preview not available

Abstract

A single-channel photoelectric radial velocity spectrometer has been installed at the coude focus of the McDonald Observatory 2.1-m telescope. Using a Griffin cross-correlation technique, the instrument provides radial velocities at the current limiting magnitude of mυ ≃ 10 in approximately 12 minutes with an uncertainty of a = 3.6 km s⁻¹ . This external uncertainty is dominated by the imprecision of the General Catalog of Radial Velocities, from which the standard velocity stars were drawn. Newly available lists of high-precision standard velocity stars will enable the uncertainty to be reduced to less than 2.0 km s⁻¹. A description of the instrument, as well as the observing procedures and reduction techniques developed, is provided. The use of the instrument to study pulsating variables is exemplified by the detection of U Aql as a new long-period binary cepheid.

Page Thumbnails

  • Thumbnail: Page 
840
    840
  • Thumbnail: Page 
841
    841
  • Thumbnail: Page 
842
    842
  • Thumbnail: Page 
843
    843
  • Thumbnail: Page 
844
    844
  • Thumbnail: Page 
845
    845
  • Thumbnail: Page 
846
    846
  • Thumbnail: Page 
847
    847