%0 Journal Article
%T Demonstration of On-Sky Calibration of Astronomical Spectra using a 25 GHz near-IR Laser Frequency Comb
%A Gabriel G. Ycas
%A Franklyn Quinlan
%A Scott A. Diddams
%A Steve Osterman
%A Suvrath Mahadevan
%A Stephen Redman
%A Ryan Terrien
%A Lawrence Ramsey
%A Chad F. Bender
%A Brandon Botzer
%A Steinn Sigurdsson
%J Physics
%D 2012
%I arXiv
%R 10.1364/OE.20.006631
%X We describe and characterize a 25 GHz laser frequency comb based on a cavity-filtered erbium fiber mode-locked laser. The comb provides a uniform array of optical frequencies spanning 1450 nm to 1700 nm, and is stabilized by use of a global positioning system referenced atomic clock. This comb was deployed at the 9.2 m Hobby-Eberly telescope at the McDonald Observatory where it was used as a radial velocity calibration source for the fiber-fed Pathfinder near-infrared spectrograph. Stellar targets were observed in three echelle orders over four nights, and radial velocity precision of \sim10 m/s (\sim6 MHz) was achieved from the comb-calibrated spectra.
%U http://arxiv.org/abs/1201.5125v2