25 July 2008 First light of UT 15-band dichroic-mirror camera
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Abstract
A dichroic mirror/filter can divide light into two different wavelength bands by the principle of interference. We proposed to use more than a dozen of these mirrors, and make a simultaneous imager in many color bands. This also enables us to make a powerful spectrograph which uses many CCDs. We here report the first light of UT 15-band Dichroic-Mirror Camera. We successfully obtained the first light at the Cassegrain focus of the 1.5-m Kanata telescope in May 2007. We also carried out the second observing run in March 2008. Our instrument covers a wide wavelength range (390-930nm), and the field of view is about 4.5 arcmin in diameter with 0.27arcsec/pixel. Image quality was limited by seeing (~1.2 arcsec at best). We describe basic design, characteristics, and performance of our instrument as well as early observational results. Future prospect of dichroic mirrors instruments will also be briefly discussed.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mamoru Doi, Mamoru Doi, Junji Hayano, Junji Hayano, Hiroyuki Utsunomiya, Hiroyuki Utsunomiya, Yutaka Ihara, Yutaka Ihara, Kouichi Tokita, Kouichi Tokita, Shigeyuki Sako, Shigeyuki Sako, Sadanori Okamura, Sadanori Okamura, Naohiro Takanashi, Naohiro Takanashi, Tomoki Morokuma, Tomoki Morokuma, Hisanori Furusawa, Hisanori Furusawa, Hidehiko Nakaya, Hidehiko Nakaya, Yutaka Komiyama, Yutaka Komiyama, Masafumi Yagi, Masafumi Yagi, Norio Okada, Norio Okada, Akira Arai, Akira Arai, Makoto Uemura, Makoto Uemura, Koji S. Kawabata, Koji S. Kawabata, Takuya Yamashita, Takuya Yamashita, Takashi Ohsugi, Takashi Ohsugi, Hiroko Ito, Hiroko Ito, Hanindyo Kuncarayakti, Hanindyo Kuncarayakti, Masanao Abe, Masanao Abe, Sunao Hasegawa, Sunao Hasegawa, Norihide Takeyama, Norihide Takeyama, Tomoyasu Yamamuro, Tomoyasu Yamamuro, Satoru Iwamura, Satoru Iwamura, } "First light of UT 15-band dichroic-mirror camera", Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70140F (25 July 2008); doi: 10.1117/12.788554; https://doi.org/10.1117/12.788554
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