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Proceedings Paper

Mid-infrared camera and spectrometer (MICS) and sky noise measurement in the N-band
Author(s): Takashi Miyata; Hirokazu Kataza; Yoshiko Okamoto; Takashi Onaka; Takuya Yamashita; Kyoko Nakamura
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Paper Abstract

We have developed the mid-IR Camera and Spectrometer (MICS), which optimized for ground based observations in the N-band atmospheric window. The MICS has two observing capabilities, imaging and long slit low-resolution spectroscopy. The major characteristics of the MICS are nearly diffraction-limited performance, both in imaging and in spectroscopy and the capability to take a spectrum of the whole N-band range with a spectral resolving power of 100 under one exposure. The MICS employs a 2D array of 128 by 128 Si:As BIB detector, an aberration-corrected concave grating, and a high-speed read out system of a compact design with high sensitivity. In mid-IR observations form the ground, there is a large background radiation from the telescope and the sky. The fluctuation of the background radiation is not well understood so far. We measured the sky fluctuation in the N- band region with the MICS on the UKIRT. These measurements have revealed that (1) the sky noise was dominant below 0.5 Hz when the sky condition was good, and (2) the sky noise has strong excess at the positions of atmospheric water vapor lines than those without water vapor lines. In this paper, we describe the design of the MICS, including optics, cryogenics, and electronics, and its performance when used on the UKIRT. We also discuss sky noise measured by the MICS in the N-band region.

Paper Details

Date Published: 16 August 2000
PDF: 11 pages
Proc. SPIE 4008, Optical and IR Telescope Instrumentation and Detectors, (16 August 2000); doi: 10.1117/12.395544
Show Author Affiliations
Takashi Miyata, Subaru Telescope/National Astronomical Observatory of Japan (Japan)
Hirokazu Kataza, Univ. of Tokyo (Japan)
Yoshiko Okamoto, Univ. of Tokyo (Japan)
Takashi Onaka, Univ. of Tokyo (Japan)
Takuya Yamashita, Subaru Telescope/National Astronomical Observatory of Japan (United States)
Kyoko Nakamura, National Astronomical Observatory of Japan (Japan)

Published in SPIE Proceedings Vol. 4008:
Optical and IR Telescope Instrumentation and Detectors
Masanori Iye; Alan F. M. Moorwood, Editor(s)

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