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The First Light of the Subaru Telescope: A New Infrared Image of the Orion Nebula

2000; Oxford University Press; Volume: 52; Issue: 1 Linguagem: Inglês

10.1093/pasj/52.1.1

2053-051X

Norio Kaifu, Tomonori Usuda, Saeko S. Hayashi, Yoichi Itoh, Masayuki Akiyama, Takuya Yamashita, Yasushi Nakajima, Yoichi Tamura, Shu‐ichiro Inutsuka, Masahiko Hayashi, Toshinori Maihara, Fumihide Iwamuro, Kentaro Motohara, J. Iwai, Hirohisa Tanabe, Tomoyuki Taguchi, Ryuji Hata, Hiroshi Terada, Miwa Goto, Hiroyasu Ando, Tetsuo Aoki, Yoshihiro Chikada, Mamoru Doi, Noboru Ebizuka, Takeo Fukuda, M. Hamabe, Tetsuo Hasegawa, T. Horaguchi, Shinichi Ichikawa, Takashi Ichikawa, Masatoshi Imanishi, Katsumi Imi, Motoko Inata, S. Isobe, Masanori Iye, Yukiko Kamata, Tomio Kanzawa, Hiroshi Karoji, Nobunari Kashikawa, Hirokazu Kataza, Taichi Kato, Naoto Kobayashi, Yukiyasu Kobayashi, Keiichi Kodaira, George Kosugi, Tomio Kurakami, Yoshitaka Mikami, Shoken M. Miyama, Akihiko Miyashita, Takashi Miyata, Satoshi Miyazaki, Y. Mizumoto, M. Nakagiri, Koich Nakajima, Kyoko Nakamura, Kyoji Nariai, Eiji Nishihara, Jun Nishikawa, Shiro Nishimura, Tetsuo Nishimura, Tetsuo Nishino, Kunio Noguchi, Takeshi Noguchi, Junichi Noumaru, Ryusuke Ogasawara, Norio Okada, Kiichi Okita, Koji Omata, Norio Oshima, Masashi Otsubo, Goro Sasaki, Toshiyuki Sasaki, M. Sekiguchi, K. Sekiguchi, Ian Shelton, Chris Simpson, Hiroshi Suto, Hideki Takami, Tadafumi Takata, Naruhisa Takato, Kyoko K. Tanaka, Wataru Tanaka, Daigo Tomono, Yasuo Torii, Koichi Waseda, J. Watanabe, Masaru Watanabe, Masafumi Yagi, Yasumasa Yamashita, Naoki Yasuda, M. Yoshida, Shigeomi Yoshida, Masami Yutani,

Astronomical Observations and Instrumentation

This paper describes the first light and subsequent test observations with the 8.2 m aperture Subaru Telescope constructed at the summit of Mauna Kea. Following the engineering first light, which started 1998 December, the astronomical first light and test observations were carried out in 1999 January with 4 testing instruments under seeing conditions of 0″.2*#x2013;0″.5 for near-infrared and 0″.3–0″.6 for optical wavelengths. The actively supported primary mirror was shown to achieve an overall imaging performance of 0″.1 (FWHM) or better in the absence of any atmospheric disturbance. The pointing accuracy of the telescope is about 1″ rms, and a closed-loop tracking accuracy of ≲ 0″.07 rms has been achieved. Infrared images of the Orion Nebula covering 5′ × 5′, obtained with J, K″, and H2v = 1–0 S(1) filters, have revealed much finer and fainter details of the BN/KL region, the bright bar, and other conspicuous features compared with previous observations. K′ band photometry of 516 point sources yielded a luminosity function with a peak at K′ ∼ 12 mag with a long tail in K′ ∼ 13 mag down to K″ ∼ 17 mag, suggesting a fairly large number of young brown dwarfs existing in the Trapezium cluster. Several new features around the Orion BN/KL region are also reported.