Fiber scrambling for high-resolution spectrographs. I. Lick observatory

Julien F P Spronck, Debra A. Fischer, Zachary A. Kaplan, Christian Schwab, Andrew Szymkowiak

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


In this article, we report all results obtained with a fiber scrambler on the Hamilton spectrograph at Lick Observatory.We demonstrate an improvement in the stability of the instrumental profile using this fiber scrambler. Additionally, we present data obtained with a double scrambler that further improves the stability of the instrument by a factor 2. These results show that errors related to the coupling between the telescope and the spectrograph are the dominant source of instrumental profile variability at Lick Observatory. In particular, we show a strong correlation between instrumental profile variations and hour angle, most likely due to pointing-dependent illumination of the spectrograph optics.

Original languageEnglish
Pages (from-to)511-521
Number of pages11
JournalPublications of the Astronomical Society of the Pacific
Issue number927
Publication statusPublished - May 2013
Externally publishedYes


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