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Line profile analysis of the laser frequency comb in FOCES
Author(s): Liang Wang; Frank Grupp; Hanna Kellermann; Ulrich Hopp; Ralf Bender
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Paper Abstract

FOCES is a fiber-fed, stabilized high-resolution (R ∼ 70,000) spectrograph attached to the 2m Fraunhofer Telescope in Wendelstein Observatory. An optical, broad-band laser frequency comb with the repetition rate of 25 GHz is used as the wavelength calibration source to obtain the precise radial velocities. We describe our method of modelling the instrumental profiles. A Gaussian plus an empirical spline function are used to fit the line spread function (LSF). We also present the results of obtaining radial velocities from an overlap of stellar spectra and emission lines of the laser frequency comb.

Paper Details

Date Published: 12 September 2017
PDF: 8 pages
Proc. SPIE 10400, Techniques and Instrumentation for Detection of Exoplanets VIII, 104001V (12 September 2017); doi: 10.1117/12.2273706
Show Author Affiliations
Liang Wang, Max-Planck-Institut für extraterrestrische Physik (Germany)
Frank Grupp, Max-Planck-Institut für extraterrestrische Physik (Germany)
Univ.-Sternwarte München (Germany)
Hanna Kellermann, Max-Planck-Institut für extraterrestrische Physik (Germany)
Ulrich Hopp, Univ.-Sternwarte München (Germany)
Max-Planck-Institut für extraterrestrische Physik (Germany)
Ralf Bender, Max-Planck-Institut für extraterrestrische Physik (Germany)
Univ.-Sternwarte München (Germany)


Published in SPIE Proceedings Vol. 10400:
Techniques and Instrumentation for Detection of Exoplanets VIII
Stuart Shaklan, Editor(s)

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