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Proceedings Paper

Mid-infrared all-sky survey with the infrared camera (IRC) on board the ASTRO-F
Author(s): Daisuke Ishihara; Takehiko Wada; Takashi Onaka; Hideo Matsuhara; Hirokazu Kataza; Munetaka Ueno; Naofumi Fujishiro; Woojung Kim; Hidenori Watarai; Kazunori Uemizu; Hiroshi Murakami; Toshio Matsumoto; Issei Yamamura
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Paper Abstract

An all-sky survey in two mid-infrared bands which cover wavelengths of 5-12um and 12-26μm with a spatial resolution of ~9" is planned to be performed with the Infrared Camera (IRC) on board the ASTRO-F infrared astronomical satellite. The expected detection limits for point sources are few tens mJy. The all-sky survey will provide the data with sensitivities more than one order of magnitude deeper and with spatial resolutions an order of magnitude higher than the Infrared Astronomical Satellite (IRAS) survey. The IRC is optimally designed for deep imaging in pointing observations. It employs 256x256 Si:As IBC infrared focal plane arrays (FPA) for the two mid-infrared channels. In order to make observations with the IRC during the survey mode of the ASTRO-F, a new operation method for the arrays has been developed - the scan mode operation. In the scan mode, only 256 pixels in a single row aligned in the cross-scan direction on the array are used as the scan detector and sampled every 44ms. Special cares have been made to stabilize the temperature of the array in the scan mode, which enables to achieve a low readout noise compatible with the imaging mode (~30 e-). The flux calibration method in the scan mode observation is also investigated. The performance of scan mode observations has been examined in computer simulations as well as in laboratory simulations by using the flight model camera and moving artificial point sources. In this paper we present the scan mode operation method of the array, the results of laboratory performance tests, the results of the computer simulation, and the expected performance of the IRC all-sky survey observations.

Paper Details

Date Published: 12 October 2004
PDF: 9 pages
Proc. SPIE 5487, Optical, Infrared, and Millimeter Space Telescopes, (12 October 2004); doi: 10.1117/12.551282
Show Author Affiliations
Daisuke Ishihara, Univ. of Tokyo (Japan)
Takehiko Wada, ISAS/Japan Aerospace Exploration Agency (Japan)
Takashi Onaka, Univ. of Tokyo (Japan)
Hideo Matsuhara, ISAS/Japan Aerospace Exploration Agency (Japan)
Hirokazu Kataza, ISAS/Japan Aerospace Exploration Agency (Japan)
Munetaka Ueno, Univ. of Tokyo (Japan)
Naofumi Fujishiro, ISAS/Japan Aerospace Exploration Agency (Japan)
Univ. of Tokyo (Japan)
Woojung Kim, Univ. of Tokyo (Japan)
ISAS/Japan Aerospace Exploration Agency (Japan)
Hidenori Watarai, Japan Aerospace Exploration Agency (Japan)
Kazunori Uemizu, Nishi-Harima Astronomical Observatory (Japan)
Hiroshi Murakami, ISAS/Japan Aerospace Exploration Agency (Japan)
Toshio Matsumoto, ISAS/Japan Aerospace Exploration Agency (Japan)
Issei Yamamura, ISAS/Japan Aerospace Exploration Agency (Japan)


Published in SPIE Proceedings Vol. 5487:
Optical, Infrared, and Millimeter Space Telescopes
John C. Mather, Editor(s)

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