Subjects: Astronomy >> Astronomical Instruments and Techniques submitted time 2024-02-07 Cooperative journals: 《天文技术与仪器（英文）》
JUST Team
Chengze Liu
Ying Zu
Fabo Feng
Zhaoyu Li
Yu Yu
Hua Bai
Xiangqun Cui
Bozhong Gu
Yizhou Gu
Jiaxin Han
Yonghui Hou
Zhongwen Hu
Hangxin Ji
Yipeng Jing
Wei Li
Zhaoxiang Qi
Xianyu Tan
Cairang Tian
Dehua Yang
Abstract： The Jiao Tong University Spectroscopic Telescope (JUST) is a 4.4-meter f/6.0 segmented-mirror telescope dedicated to spectroscopic observations. The JUST primary mirror is composed of 18 hexagonal segments, each with a diameter of 1.1 m. JUST provides two Nasmyth platforms for placing science instruments. One Nasmyth focus fits a field of view of 10 ′ and the other has an extended field of view of 1.2° with correction optics. A tertiary mirror is used to switch between the two Nasmyth foci. JUST will be installed at a site at Lenghu in Qinghai Province, China, and will conduct spectroscopic observations with three types of instruments to explore the dark universe, trace the dynamic universe, and search for exoplanets: (1) a multi-fiber (2000 fibers) medium-resolution spectrometer (R=4 000−5 000) to spectroscopically map galaxies and large-scale structure; (2) an integral field unit (IFU) array of 500 optical fibers and/or a long-slit spectrograph dedicated to fast follow-ups of transient sources for multi-messenger astronomy; (3) a high-resolution spectrometer (R~100 000) designed to identify Jupiter analogs and Earth-like planets, with the capability to characterize the atmospheres of hot exoplanets.
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