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Precise Radial Velocity Measurements with a Cassegrain Spectrograph, I: Wavelength calibration

Published online by Cambridge University Press:  12 April 2016

I. V. Ilyin  and
R. Duemmler
I. V. Ilyin
Affiliation:
Astronomy Division, University of Oulu, FIN-90571, Oulu, Finland
R. Duemmler
Affiliation:
Astronomy Division, University of Oulu, FIN-90571, Oulu, Finland

Abstract

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We briefly describe the instrumental effects which affect the accuracy of the radial velocity measurements. We have implemented several methods to correct for the instability effects and improve the accuracy of the measurements. These include modifications of the observational strategy and a time-dependent wavelength solution as well as a discussion of the error of the offset from cross-correlation. These methods are applied to observations obtained with the high resolution échelle spectrograph SOFIN mounted at the Cassegrain focus of the alt-azimuth 2.56-m Nordic Optical Telescope, La Palma, Canary Islands.

Type
Part 2. Fundamental Concepts and Techniques
Information
International Astronomical Union Colloquium , Volume 170: Precise Stellar Radial Velocities , 1999 , pp. 63 - 67
Copyright
Copyright © Astronomical Society of the Pacific 1999

References

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