Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21725309t&link_type=abstract
American Astronomical Society, AAS Meeting #217, #253.09; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
We describe changes to the warm-bench, fiber-fed, Penn State Pathfinder instrument that enabled us to test the ability to recover precision radial velocities in the H-band. The use of thermal blocking filters that cut off at 1.7 microns allows us to observe in the H-band by blocking the overwhelming thermal flux beyond 2 microns. A PK-50 window provides further suppression of this thermal flux. We also describe the observations, reduction, and results from an August 2010 test run of this instrument with a 25 GHz NIST laser frequency comb calibration system. We obtained radial velocities of several bright stars with on-sky observation with the laser comb. Our results demonstrate the potential of our testbed configuration for obtaining precision radial velocities in the NIR, as well as the utility of laser frequency combs as wavelength calibrators in this wavelength regime.
Bender Christian
Botzer Brandon
Diddams Scott
Mahadevan Suvrath
Osterman Steve
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