FIES: The high‐resolution Fiber‐fed Echelle Spectrograph at the Nordic Optical Telescope

TLDR

FIES is a cross‑dispersed high‑resolution echelle spectrograph at the 2.56 m Nordic Optical Telescope, optimised for throughput and stability since 2006. The 2006 upgrade moved FIES to a stable environment, introduced a fiber bundle providing three resolution modes, implemented double‑chamber active temperature control for radial‑velocity stability, and added the FIEStool data‑reduction package. These upgrades have made FIES a work‑horse instrument for the NOT user community. © 2014 WILEY‑VCH Verlag GmbH & Co.

Abstract

Abstract FIES is a cross‐dispersed high‐resolution echelle spectrograph at the 2.56 m Nordic Optical Telescope (NOT), and was optimised for throughput and stability in 2006. The major 2006 upgrade involved the relocation of FIES to a stable environment and development of a fiber bundle that offers 3 different resolution modes, and made FIES an attractive tool for the user community of the NOT. Radial‐velocity stability is achieved through double‐chamber active temperature control. A dedicated data reduction tool, FIEStool, was developed. As a result of these upgrades, FIES is now one of the work‐horse instruments at the NOT. (© 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)