A Method of Correcting Near‐Infrared Spectra for Telluric Absorption1 | Zendy

William D. Vacca | Zendy; Michael C. Cushing | Zendy; John Rayner | Zendy

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A Method of Correcting Near‐Infrared Spectra for Telluric Absorption1

Author(s) -

William D. Vacca,

Michael C. Cushing,

John Rayner

Publication year - 2003

Publication title -

publications of the astronomical society of the pacific

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.294

H-Index - 172

eISSN - 1538-3873

pISSN - 0004-6280

DOI - 10.1086/346193

Subject(s) - spectrograph , spectral line , physics , telescope , infrared , spectral resolution , absorption (acoustics) , optics , infrared telescope , infrared spectroscopy , resolution (logic) , astrophysics , remote sensing , astronomy , geology , computer science , quantum mechanics , artificial intelligence

We present a method for correcting near-infrared medium-resolution spectrafor 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 ahigh-resolution model of Vega, to construct a telluric correction spectrum thatis free of stellar absorption features. The technique was designed specificallyto perform telluric corrections on spectra obtained with SpeX, a 0.8-5.5micron, medium-resolution cross-dispersed spectrograph at the NASA InfraredTelescope Facility, and uses the fact that for medium resolutions there existspectral regions uncontaminated by atmospheric absorption lines. However, it isalso applicable (in a somewhat modified form) to spectra obtained with othernear-infrared spectrographs. An IDL-based code that carries out the proceduresis available for downloading via the World Wide Web from the IRTF website.

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