探索者Dragonfly谱线测绘仪：突破超低表面亮度的极限spectroscopy
The pathfinder Dragonfly Spectral Line Mapper: Pushing the limits for ultra-low surface brightness spectroscopy
摘要：
“蜻蜓”谱线测绘仪是一种分布式孔径望远镜，它以“蜻蜓”长焦阵列为基础，带有额外的仪器（“蜻蜓“滤波器-倾斜器”），以实现超窄带成像。探路者是由三个冗余的光学管组件（OTA）安装在一起，形成一个单一的视场成像望远镜（其中有效孔径直径增加的OTA的数量的平方根）。探路者已于2020年3月至2021年10月在天空中使用，配备窄带滤光片，以提供概念验证成像，表面亮度极限测量，天空测试和观测软件开发。在这里，我们描述了探路者望远镜和观测方法达到的灵敏度极限。我们概述了目前的限制因素，达到超低表面亮度，并提出了一个全面的比较仪器的灵敏度低表面亮度线发射和其他方法观察超微弱线发射扩散气体。最后，我们谈到即将到来的120 OTA蜻蜓谱线测绘仪的计划，这是目前正在建设中。
英文摘要：
The pathfinder Dragonfly Spectral Line Mapper is a distributed aperture telescope based off of the Dragonfly Telephoto Array with additional instrumentation (the Dragonfly "Filter-Tilter") to enable ultranarrow bandpass imaging. The pathfinder is composed of three redundant optical tube assemblies (OTAs) which are mounted together to form a single field of view imaging telescope (where the effective aperture diameter increases as the square-root of the number of OTAs). The pathfinder has been on sky from March 2020 to October 2021 equipped with narrowband filters to provide proof-of-concept imaging, surface brightness limit measurements, on sky testing, and observing software development. Here we describe the pathfinder telescope and the sensitivity limits reached along with observing methods. We outline the current limiting factors for reaching ultra-low surface brightnesses and present a comprehensive comparison of instrument sensitivities to low surface brightness line emission and other methods of observing the ultra-faint line emission from diffuse gas. Finally, we touch on plans for the upcoming 120-OTA Dragonfly Spectral Line Mapper, which is currently under construction.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
