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Synthesising, using, and correcting for telluric features in high-resolution astronomical spectra
- Publication Year :
- 2010
-
Abstract
- We present a technique to synthesise telluric absorption and emission features both for in-situ wavelength calibration and for their removal from astronomical spectra. While the presented technique is applicable for a wide variety of optical and infrared spectra, we concentrate in this paper on selected high-resolution near-infrared spectra obtained with the CRIRES spectrograph to demonstrate its performance and limitation. We find that synthetic spectra reproduce telluric absorption features to about 2%, even close to saturated line cores. Thus, synthetic telluric spectra could be used to replace the observation of telluric standard stars, saving valuable observing time. This technique also provides a precise in-situ wavelength calibration, especially useful for high-resolution near-infrared spectra in the absence of other calibration sources.<br />Comment: 11 pages, 11 figures, accepted for publication in A&A (updated version)
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.1008.3419
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1051/0004-6361/200913782