ELT -HIRES the High Resolution Spectrograph for the ELT: Fabry-Pérots for use as calibration sources

Philipp Huke*, Sebastian Schäfer, Ansgar Reiners, Ulf Seemann, Marco Riva, Francesco Pepe, Bruno Chazelas, Piotr Masłowski, Grzegorz Kowzan, Richard Alexander McCracken, Derryck Telford Reid

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)
91 Downloads (Pure)


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-Ṕerots (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.

Original languageEnglish
Title of host publicationGround-based and Airborne Instrumentation for Astronomy VII
EditorsChristopher J. Evans, Luc Simard, Hideki Takami
ISBN (Electronic)9781510619586
ISBN (Print)9781510619579
Publication statusPublished - 12 Jul 2018
EventSPIE Astronomical Telescope and Instrumentation 2018 - Austin, United States
Duration: 10 Jun 201815 Jun 2018

Publication series

NameProceedings of SPIE
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceSPIE Astronomical Telescope and Instrumentation 2018
Country/TerritoryUnited States


  • Calibration
  • Spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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