iLocater的调试与在轨天文性能验证
Commissioning and on-sky performance verification of iLocater
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中文总结 AI 辅助
该研究对安装于大双筒望远镜的iLocater近红外极端精度视向速度光谱仪开展调试与在轨性能验证，确认其可观测密近双星，为天文观测提供高分辨率光谱数据支持。
中文摘要 AI 辅助
iLocater是一款高分辨率近红外极端精度视向速度（EPRV）光谱仪，于2026年6月安装至大双筒望远镜（LBT），工作波长范围为λ=966-1312 nm，实验室测得的中等分辨率为R=205000。本文介绍在LBT上利用太阳和夜间观测开展的调试及初始在轨天文验证项目，2026年6月27日实现首光，目前已记录近150条在轨光谱，观测对象涵盖光谱型从B5到M6的单星。iLocater采用LBT的自适应光学（AO）系统，已证明其能获取角距离θ<1''的密近双星的空间分辨光谱。
英文摘要
iLocater is a high-resolution near-infrared extreme precision radial velocity (EPRV) spectrograph that was deployed to the Large Binocular Telescope (LBT) in June 2026. iLocater operates over $λ=966-1312$ nm with a median resolving power of $R=205,000$ as measured in the laboratory. We present the commissioning and initial on-sky verification program using solar and night-time observations at the LBT. First light was achieved on 27 June 2026, and nearly 150 on-sky spectra have now been recorded. Observations include single stars ranging in spectral type from B5 to M6. iLocater uses the LBT AO system, and we have demonstrated its ability to obtain spatially resolved spectra of close ($θ< 1''$) binary stars.
