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12 July 2018 ELT -HIRES the High Resolution Spectrograph for the ELT: Fabry-Pérots for use as calibration sources
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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.
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Philipp Huke, Sebastian Schäfer, Ansgar Reiners, Ulf Seemann, Marco Riva, Francesco Pepe, Bruno Chazelas, Piotr Masłowski, Grzegorz Kowzan, Richard A. McCracken, and Derryck T. Reid "ELT -HIRES the High Resolution Spectrograph for the ELT: Fabry-Pérots for use as calibration sources", Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107029L (12 July 2018); https://doi.org/10.1117/12.2313394
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