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| Paper: |
A Swiss Watch Running on Chilean Time: A Progress Report on Two New Automated CORALIE RV Pipelines |
| Volume: |
448, 16th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun |
| Page: |
991 |
| Authors: |
Jenkins, J. S.; Jordán, A. |
| Abstract: |
We present the current status of two new fully automated reduction and analysis pipelines, built for the Euler
telescope and the CORALIE spectrograph. Both pipelines have been designed and built independently at the
Universidad de Chile and Universidad Catolica by the two authors. Each pipeline has also been written on two
different platforms, IDL and Python, and both can run fully automatically through full reduction and analysis of
CORALIE datasets. The reduction goes through all standard steps from bias subtraction, flat-fielding, scattered
light removal, optimal extraction and full wavelength calibration of the data using well exposed ThAr arc lamps.
The reduced data are then cross-correlated with a binary template matched to the spectral type of each star and
the cross-correlation functions are fit with a Gaussian to extract precision radial-velocities. For error analysis we are currently testing
bootstrap, jackknifing and cross validation methods to properly determine uncertainties directly from the data.
Our pipelines currently show long term stability at the 12–15m/s level, measured by observations of two known
radial-velocity standard stars. In the near future we plan to get the stability down to the 5–6m/s level and also
transfer these pipelines to other instruments like HARPS. |
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