Institute of Astronomy

A set of automated pipelines for echelle spectrographs developed for the follow up of planetary transit candidates from the HATS

SpeakerTalk DateTalk Series
Rafael Brahm28 July 2014Across HR 2014 Posters


A key task in the detection of exoplanets coming from transit surveys is the rejection of false positives and the confirmation of the true planets by measuring the Keplerian radial velocity signal of the host. Due to their high resolving power and wide spectral coverage, echelle spectrographs have proven to be a powerful tool for these goals. Here we present a homogeneous set of fully automated reduction pipelines for a large number of echelle spectrographs. Besides optimal extraction and wavelength calibration of the spectrum, these pipelines provide measurements of high precision radial velocities, bisector spans and stellar parameters. As an example of their performance, we have achieved a long term accuracy of ~9 m/s for the CORALIE spectrograph and ~7 m/s for the FEROS spectrograph as gauged by monitoring velocity standard stars for a period ~3 years.


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