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The Sydney University stellar interferometer : a major upgrade to spectral coverage and performance

机译:悉尼大学恒星干涉仪:光谱覆盖范围和性能的重大升级

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摘要

A new beam-combination and detection system has been installed in the Sydney University Stellar Interferometer working at the red end of the visual spectrum (λλ500-950 nm) to complement the existing blue-sensitive system (λλ430-520 nm) and to provide an increase in sensitivity. Dichroic beam-splitters have been introduced to allow simultaneous observations with both spectral systems, albeit with some restriction on the spectral range of the longer wavelength system (λλ550-760 nm). The blue system has been upgraded to allow remote selection of wavelength and spectral bandpass, and to enable simultaneous operation with the red system with the latter providing fringe-envelope tracking. The new system and upgrades are described and examples of commissioning tests presented. As an illustration of the improvement in performance the measurement of the angular diameter of the southern F supergiant δ CMa is described and compared with previous determinations.
机译:悉尼大学恒星干涉仪中已安装了新的光束组合和检测系统,该系统工作在可见光谱的红色端(λλ500-950nm),以补充现有的蓝敏感系统(λλ430-520nm)并提供一个增加灵敏度。已经引入了二向色分束器,以允许同时观察两个光谱系统,尽管对较长波长系统(λλ550-760nm)的光谱范围有所限制。蓝色系统已经升级,可以远程选择波长和光谱带通,并且可以与红色系统同时运行,而红色系统提供边缘包络跟踪。描述了新系统和升级,并提供了调试测试的示例。为了说明性能的改进,描述了南部F超巨型δCMa的角直径的测量结果,并将其与以前的确定结果进行了比较。

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