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Proceedings Paper

Photometric error in mid-infrared observations at the TAO site caused by short-term variation of atmospheric water vapor
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Paper Abstract

Time variation of the atmospheric water vapor is an important problem to achieve accurate photometry in ground-based mid-infrared observations. Long-term (~ minutes or hours) variation has been already known, but short-term (~ seconds) variation has not been quantified in previous studies. We evaluate this short-term variation and the photometric error in the mid-infrared observations at the TAO site by using actual astronomical data. Estimated photometric errors are typically less than 1% but show 2-5% in two of fifteen cases. This suggests that the short-term variation of the water vapor is one of the factors which limit the photometric accuracy in ground based mid-infrared observations.

Paper Details

Date Published: 6 July 2018
PDF: 9 pages
Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107022B (6 July 2018); doi: 10.1117/12.2311778
Show Author Affiliations
Masahito S. Uchiyama, The Univ. of Tokyo (Japan)
Takashi Miyata, The Univ. of Tokyo (Japan)
Ryou Ohsawa, The Univ. of Tokyo (Japan)
Takafumi Kamizuka, The Univ. of Tokyo (Japan)
Shigeyuki Sako, The Univ. of Tokyo (Japan)
Jumpei Yamaguchi, The Univ. of Tokyo (Japan)
Tomohiro Mori, The Univ. of Tokyo (Japan)
Yutaka Yoshida, The Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 10702:
Ground-based and Airborne Instrumentation for Astronomy VII
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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