论文标题
Tierras天文台：一个超精致的光度计，以表征附近的陆地系外行星
The Tierras Observatory: An ultra-precise photometer to characterize nearby terrestrial exoplanets
论文作者
论文摘要
我们报告了Tierras天文台的状态，这是位于亚利桑那州霍普金斯山的F. L. Whipple天文台上翻新的1.3 m超级全自动光度计。 Tierras旨在将系统误差（尤其是可累积的水蒸气（PWV））限制在250 ppm上，从而使陆上行星Transits的表征旋转$ <0.3 \，r _ {\ odot} $星，以及可能发现Exo-moons and exo-moons and exo-Rings和Exo-Rings。将使我们的科学目标的设计选择包括：四个镜头焦点和现场范围，以将望远镜的视野从$ 11.94'$增加到$ 0.48^{\ circ} $ side；定制的窄带通道（$ 40.2 $ nm fwhm）的过滤器中心左右$ 863.5 $ nm，以最大程度地减少已知的PWV错误，以限制红色矮人的地面光度计；并具有300ke-full井的深度$ 4K \ times 4k $ ccd，在我们的bandpass中，在框架传输模式下运行。我们还在追求一组挡板的设计，以最大程度地减少到达图像平面的大量散射光。 Tierras将于2021年初开始科学运营。
We report on the status of the Tierras Observatory, a refurbished 1.3-m ultra-precise fully-automated photometer located at the F. L. Whipple Observatory atop Mt. Hopkins, Arizona. Tierras is designed to limit systematic errors, notably precipitable water vapor (PWV), to 250 ppm, enabling the characterization of terrestrial planet transits orbiting $< 0.3 \, R_{\odot}$ stars, as well as the potential discovery of exo-moons and exo-rings. The design choices that will enable our science goals include: a four-lens focal reducer and field-flattener to increase the field-of-view of the telescope from a $11.94'$ to a $0.48^{\circ}$ side; a custom narrow bandpass ($40.2$ nm FWHM) filter centered around $863.5$ nm to minimize PWV errors known to limit ground-based photometry of red dwarfs; and a deep-depletion $4K \times 4K$ CCD with a 300ke-full well and QE$>85\%$ in our bandpass, operating in frame transfer mode. We are also pursuing the design of a set of baffles to minimize the significant amount of scattered light reaching the image plane. Tierras will begin science operations in early 2021.
