FIES fiber injection upgrade

Bibcode
2018SPIE10702E..2SS
DOI
10.1117/12.2313052
Stürmer, Julian; Seifahrt, Andreas; Schwab, Christian; Gandolfi, Davide; Montañes-Rodriguez, Pilar; Buchhave, Lars
Bibliographical reference

Proceedings of the SPIE, Volume 10702, id. 107022S 5 pp. (2018).

Advertised on:
7
2018
Number of authors
6
IAC number of authors
1
Citations
1
Refereed citations
1
Description
We report on the upgrade of the fiber link of FIES, the high-resolution echelle spectrograph at the Nordic Optical Telescope (NOT). In order to improve the radial velocity (RV) stability of FIES, we replaced the circular fibers by octagonal and rectangular ones to utilize their superior scrambling performance. Two additional fibers for a planned polarimetry mode were added during the upgrade. The injection optics and the telescope front-end were also replaced. The first on-sky RV measurements indicate that the influence of guiding errors is greatly suppressed, and the overall RV precision of FIES has significantly improved.
Type
Non-refereed

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