The Tomo-e Gozen wide field CMOS camera for the Kiso Shmidt telescope
Proc. SPIE, pp. 107020J
Authors:
- Shigeyuki Sako
- Ryou Ohsawa
- Hidenori Takahashi
- Yuto Kojima
- Mamoru Doi
- Naoto Kobayashi
- Tsutomu Aoki
- Noriaki Arima
- Ko Arimatsu
- Makoto Ichiki
- Shiro Ikeda
- Kota Inooka
- Yoshifusa Ita
- Toshihiro Kasuga
- Mitsuru Kokubo
- Masahiro Konishi
- Hiroyuki Maehara
- Noriyuki Matsunaga
- Kazuma Mitsuda
- Takashi Miyata
- Yuki Mori
- Mikio Morii
- Tomoki Morokuma
- Kentaro Motohara
- Yoshikazu Nakada
- Shin-Ichiro Okumura
- Yuki Sarugaku
- Mikiya Sato
- Toshikazu Shigeyama
- Takao Soyano
- Masaomi Tanaka
- Ken’ichi Tarusawa
- Nozomu Tominaga
- Tomonori Totani
- Seitaro Urakawa
- Fumihiko Usui
- Junichi Watanabe
- Takuya Yamashita
- Makoto Yoshikawa
URL:
Abstract:
The Tomo-e Gozen is a wide-field high-speed camera for the Kiso $1.0$ m Schmidt telescope, with a field-of-view of $20.7$ deg$^2$ covered by 84 chips of 2k$\times$1k CMOS image sensors with 19 ${\mu}$m pixels. It is capable to take consecutive images at 2 fps in full-frame read with an absolute time accuracy of 0.2 millisecond. The sensors are operated without mechanical coolers owing to a low dark current at room temperature. A low read noise of 2 e$^-$ achieves higher sensitivity than that with a CCD sensor in short exposures. Big data of 30 TBytes per night produced in the 2 fps observations is processed in real-time to quickly detect transient events and issue alerts for follow-ups.