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    Combining laser frequency combs and iodine cell calibration techniques for Doppler detection of exoplanets by Cahoy, K., Fischer, D., Spronck, J., Demille, D.

    Published 2017
    “…The smaller mass and longer period of true Earth analogues require the ability to detect a reflex velocity of ~10 cm/s over long time periods. Currently, typical astronomical spectrographs calibrate using either Iodine absorptive cells or Thorium Argon lamps and achieve ~10 m/s precision, with the most stable spectrographs pushing down to ~2 m/s. …”
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