First results of the 4-fiber upgrade of the high-resolution comb calibrated spectrograph FOCES

Kellermann, Hanna; Wang, Liang; Fahrenschon, Vanessa; Grupp, Frank; Hopp, Ulrich und Bender, Ralf (2019): First results of the 4-fiber upgrade of the high-resolution comb calibrated spectrograph FOCES. In: Techniques and Instrumentation for Detection of Exoplanets Ix, Vol. 11117, 111171O

Abstract

FOCES is a highly stabilized high-resolution optical Echelle 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-fiber-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.

• Item Type: Journal article
• Faculties: Physics
• Subjects: 500 Science > 530 Physics
• ISSN: 0277-786X
• Language: English