Rubidium-traced white-light etalon calibrator for radial velocity measurements at the cm s-1 level

Julian Stürmer, Andreas Seifahrt, Christian Schwab, Jacob L. Bean

Research output: Contribution to journalArticleResearchpeer-review

Abstract

We report on the construction and testing of a vacuum-gap Fabry-Pérot etalon calibrator for high precision radial velocity spectrographs. Our etalon is traced against a rubidium frequency standard to provide a cost effective, yet ultra precise wavelength reference. We describe here a turn-key system working at 500 to 900 nm, ready to be installed at any current and next-generation radial velocity spectrograph that requires calibration over a wide spectral bandpass. Where appropriate, we have used off-the-shelf, commercial components with demonstrated long-term performance to accelerate the development timescale of this instrument. Our system combines for the first time the advantages of passively stabilized etalons for optical and near-infrared wavelengths with the laser-locking technique demonstrated for single-mode fiber etalons. We realize uncertainties in the position of one etalon line at the 10cm s-1 level in individual measurements taken at 4 Hz. When binning the data over 10 s, we are able to trace the etalon line with a precision of better than 3cm s-1. We present data obtained during a week of continuous operation where we detect (and correct for) the predicted, but previously unobserved shrinking of the etalon Zerodur spacer corresponding to a shift of 13cm s-1 per day.

LanguageEnglish
Article number025003
Pages1-10
Number of pages10
JournalJournal of Astronomical Telescopes, Instruments, and Systems
Volume3
Issue number2
DOIs
Publication statusPublished - 2017

Fingerprint

Etalons
Rubidium
etalons
rubidium
Spectrographs
velocity measurement
radial velocity
Velocity measurement
spectrographs
wavelength
Wavelength
Frequency standards
frequency standards
Single mode fibers
shelves
wavelengths
spacers
locking
near infrared
laser

Keywords

  • echelle spectrograph
  • radial velocity
  • etalon
  • comb
  • frequency standard
  • optical fibers

Cite this

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title = "Rubidium-traced white-light etalon calibrator for radial velocity measurements at the cm s-1 level",
abstract = "We report on the construction and testing of a vacuum-gap Fabry-P{\'e}rot etalon calibrator for high precision radial velocity spectrographs. Our etalon is traced against a rubidium frequency standard to provide a cost effective, yet ultra precise wavelength reference. We describe here a turn-key system working at 500 to 900 nm, ready to be installed at any current and next-generation radial velocity spectrograph that requires calibration over a wide spectral bandpass. Where appropriate, we have used off-the-shelf, commercial components with demonstrated long-term performance to accelerate the development timescale of this instrument. Our system combines for the first time the advantages of passively stabilized etalons for optical and near-infrared wavelengths with the laser-locking technique demonstrated for single-mode fiber etalons. We realize uncertainties in the position of one etalon line at the 10cm s-1 level in individual measurements taken at 4 Hz. When binning the data over 10 s, we are able to trace the etalon line with a precision of better than 3cm s-1. We present data obtained during a week of continuous operation where we detect (and correct for) the predicted, but previously unobserved shrinking of the etalon Zerodur spacer corresponding to a shift of 13cm s-1 per day.",
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Rubidium-traced white-light etalon calibrator for radial velocity measurements at the cm s-1 level. / Stürmer, Julian; Seifahrt, Andreas; Schwab, Christian; Bean, Jacob L.

In: Journal of Astronomical Telescopes, Instruments, and Systems, Vol. 3, No. 2, 025003, 2017, p. 1-10.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Rubidium-traced white-light etalon calibrator for radial velocity measurements at the cm s-1 level

AU - Stürmer, Julian

AU - Seifahrt, Andreas

AU - Schwab, Christian

AU - Bean, Jacob L.

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KW - echelle spectrograph

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