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Proceedings Paper

Modeling the image distortion of echelle spectrographs with T&P changes
Author(s): Frank Grupp; ShaoMing Hu; Liang Wang
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Paper Abstract

Even slight changes of temperature and pressure in high resolution ´Echelle spectrographs affect the spot image on the detector plane. At the same time astronomical applications require a stability of the measurement of up to 1/3000 of a pixel on the CCD (with a typical pixel size being 15μm). With this paper we present a study of the effects of thermal and pressure instabilities on ray tracing models of a typical ´Echelle spectrograph. We conclude the required minimum stabilty in these two parameters to reach the goal of precision spectroscopy.

Paper Details

Date Published: 20 August 2009
PDF: 9 pages
Proc. SPIE 7440, Techniques and Instrumentation for Detection of Exoplanets IV, 74401G (20 August 2009); doi: 10.1117/12.825845
Show Author Affiliations
Frank Grupp, Ludwigs-Maximilians Univ. (Germany)
Max-Planck Institute for Extraterrestrial Physics (Germany)
ShaoMing Hu, Max-Planck Institute for Extraterrestrial Physics (Germany)
Shandong Univ. (China)
Liang Wang, National Astronomical Observatories (China)


Published in SPIE Proceedings Vol. 7440:
Techniques and Instrumentation for Detection of Exoplanets IV
Stuart B. Shaklan, Editor(s)

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