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9 September 2019 First results of the 4-fiber upgrade of the high-resolution comb calibrated spectrograph FOCES
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Abstract
FOCES is a highly stabilized high-resolution optical Échelle spectrograph operated with the 2m telescope at the Wendelstein Observatory. After an extensive temperature- and pressure-stabilization upgrade, reaching the m/s-level, we now focus on the wavelength calibration process. Due to our latest improvements, we are able to perform simultaneous wavelength calibration using our new 4-_ber-slit assembly. This allows us to couple the spectrum of a star and light from a ThAr/UNe hollow cathode lamp or our frequency comb_ at the same time into the spectrograph. We present the design, production process and performance of this new multi-fiber assembly and also evaluate the stability as a test for the upcoming high precision radial velocity measurements in search of exoplanets.
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Hanna Kellermann, Liang Wang, Vanessa Fahrenschon, Frank Grupp, Ulrich Hopp, and Ralf Bender "First results of the 4-fiber upgrade of the high-resolution comb calibrated spectrograph FOCES", Proc. SPIE 11117, Techniques and Instrumentation for Detection of Exoplanets IX, 111171O (9 September 2019); https://doi.org/10.1117/12.2529283
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