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Proceedings Paper

A method for reducing atmospheric noise without chopping for ground-based mid-infrared observations
Author(s): Tomohiko Nakamura; Takashi Miyata; Shigeyuki Sako; Takafumi Kamizuka; Kentaro Asano; Mizuho Uchiyama; Kazushi Okada
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Paper Abstract

We introduce a new method named as “weighted average method" to reduce atmospheric noise on the images in ground based mid-infrared observations. The main idea of this method is to find a sky frame corresponded to an object frame by superposition of several sky frames, instead of the conventional chop-and-nod observation technique. This is very useful not only for improving the observing efficiency but also for taking images of extended objects larger than the chopping throw. This method is also valid for reducing data taken by the chopping with insufficient frequency. In this paper we will report the details of the weighted average method and demonstrate its performance against practical observing data.

Paper Details

Date Published: 9 August 2016
PDF: 9 pages
Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99082U (9 August 2016); doi: 10.1117/12.2231996
Show Author Affiliations
Tomohiko Nakamura, The Univ. of Tokyo (Japan)
Takashi Miyata, The Univ. of Tokyo (Japan)
Shigeyuki Sako, The Univ. of Tokyo (Japan)
Takafumi Kamizuka, The Univ. of Tokyo (Japan)
Kentaro Asano, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Mizuho Uchiyama, National Astronomical Observatory of Japan (Japan)
Kazushi Okada, The Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 9908:
Ground-based and Airborne Instrumentation for Astronomy VI
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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