Measuring stellar line-of-sight velocities with the SCORPIO instrument

Details Measuring stellar line-of-sight velocities with the SCORPIO instrument Measuring stellar line-of-sight velocities with the SCORPIO instrument

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008astbu..63...70m&link_type=abstract

Astrophysical Bulletin, Volume 63, Issue 1, pp.70-82

Statistics

Methodology

2

97.10.Wn, 95.55.Qf

Scientific paper

We analyze factors that affect the accuracy of stellar line-of-sight velocities measured from the spectra obtained with the SCORPIO instrument attached to the 6-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences. We show that nonuniform illumination of the spectrograph slit combined with the effect of differential atmospheric refractionmay result in substantial systematic errors in the inferred line-of-sight velocities, and formulate recommendations concerning the methodology of observations, which allow the errors of line-of-sight velocity measurements to be minimized.

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