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Demonstration of on-sky calibration of astronomical spectra using a 20 GHz near-IR laser frequency comb
Published
Author(s)
Gabriel G. Ycas, Franklyn J. Quinlan, Scott A. Diddams, Steve Osterman, Chad F. Bender, Brandon Botzer, Lawrence W. Ramsey, Ryan Terrien, Suvrath Mahadevan, Stephen L. Redman
Abstract
We describe and characterize a 25 GHz laser frequency comb based on a cavity-filtered erbium fiber mode-locked laser that provides a uniform array of optical frequencies stabilized using the GPS-system atomic clocks spanning 14751625 nm. This comb was transported to the Hobby-Eberly telescope at the McDonald observatory where it was used to calibrate the Pathfinder near-infrared spectrograph. Stellar targets were observed in 3 echelle orders over 4 nights.
Ycas, G.
, Quinlan, F.
, Diddams, S.
, Osterman, S.
, Bender, C.
, Botzer, B.
, Ramsey, L.
, Terrien, R.
, Mahadevan, S.
and Redman, S.
(2012),
Demonstration of on-sky calibration of astronomical spectra using a 20 GHz near-IR laser frequency comb, Optics Express, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=910016
(Accessed October 7, 2025)