Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-11-12
Publ.Astron.Soc.Pac.115:389-409,2003
Astronomy and Astrophysics
Astrophysics
39 pages, 10 figures, To appear in the Feb 2003 issue of PASP; IDL source code, as well as full resolution versions of the fig
Scientific paper
10.1086/346193
We present a method for correcting near-infrared medium-resolution spectra for telluric absorption. The method makes use of a spectrum of an A0V star, observed near in time and close in airmass to the target object, and a high-resolution model of Vega, to construct a telluric correction spectrum that is free of stellar absorption features. The technique was designed specifically to perform telluric corrections on spectra obtained with SpeX, a 0.8-5.5 micron, medium-resolution cross-dispersed spectrograph at the NASA Infrared Telescope Facility, and uses the fact that for medium resolutions there exist spectral regions uncontaminated by atmospheric absorption lines. However, it is also applicable (in a somewhat modified form) to spectra obtained with other near-infrared spectrographs. An IDL-based code that carries out the procedures is available for downloading via the World Wide Web from the IRTF website.
Cushing Michael. C.
Rayner John T.
Vacca William D.
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