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Proceedings Paper

ELT -HIRES the High Resolution Spectrograph for the ELT: Fabry-Pérots for use as calibration sources
Author(s): Philipp Huke; Sebastian Schäfer; Ansgar Reiners; Ulf Seemann; Marco Riva; Francesco Pepe; Bruno Chazelas; Piotr Masłowski; Grzegorz Kowzan; Richard A. McCracken; Derryck T. Reid
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Paper Abstract

High resolution spectroscopy enables the detection of atmospheres of exoplanets. To reach the required radial velocity precision of about 1 m/s, calibration with even more precise sources is mandatory. HIRES will employ several calibration sources, the most important ones are an Laser Frequency Comb (LFC) and Fabry-P´erots (FP). The LFC needs to be filtered with a set of FP. One possible solution is to illuminate this set of FP with a broadband light source and use them as calibrators, when they are not used for filtering the LFC. It has been demonstrated that passively-stabilized FP can perform better than 10 cm/s per night. We give an overview of the currently used FP in different surveys and compare their individual features. For the FP which may be used in HIRES we discuss different configuration. We show that the Finesse and FSR of the FP needs to be optimized with regard to the resolution of the spectrograph and we outline how we aim to fulfill the requirements of HIRES.

Paper Details

Date Published: 12 July 2018
PDF: 10 pages
Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107029L (12 July 2018); doi: 10.1117/12.2313394
Show Author Affiliations
Philipp Huke, Georg-August-Univ. Göttingen (Germany)
Sebastian Schäfer, Georg-August-Univ. Göttingen (Germany)
Ansgar Reiners, Georg-August-Univ. Göttingen (Germany)
Ulf Seemann, Georg-August-Univ. Göttingen (Germany)
Marco Riva, Observatoire de l'Univ. de Genève (Switzerland)
Francesco Pepe, Observatoire de l'Univ. de Genève (Switzerland)
Bruno Chazelas, Observatoire de l'Univ. de Genève (Switzerland)
Piotr Masłowski, Nicolaus Copernicus Univ. (Poland)
Grzegorz Kowzan, Nicolaus Copernicus Univ. (Poland)
Richard A. McCracken, Scottish Univ. Physics Alliance, Heriot-Watt Univ. (United Kingdom)
Derryck T. Reid, Scottish Univ. Physics Alliance, Heriot-Watt Univ. (United Kingdom)


Published in SPIE Proceedings Vol. 10702:
Ground-based and Airborne Instrumentation for Astronomy VII
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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