第一个光从圆顶C（南极洲）的相位刀恒星日冕
First light from the Dome C (Antarctica) of a phase knife stellar coronagraph
摘要：
我们报告的第一个白天在天空中的结果相刀恒星日冕在可见光操作从法国-意大利Concordia站在南极洲的圆顶C。在过去的几年里，该站点已被证明为高空间分辨率观测提供了极好的大气视宁度条件。从实验室实验和数值模型中获得的日冕性能进行了比较，从白天的天空数据记录在明亮的单星和多星：老人星（HD 45348），半人马座α（HD 128620 J）。没有使用校正系统（自适应光学或倾斜镜），因此大气湍流单独定义了图像质量，从而定义了日冕照相性能。此外，由于硬件/软件问题，实验无法在最佳操作条件下运行。实验结果令人满意：在可见光区，宽带总抑制率超过15。第一次白天观测活动产生了关于如何改进仪器以在未来夜间观测运行中获得最佳性能的实验反馈。
英文摘要：
We report on the first daytime on-sky results of a Phase Knife stellar Coronagraph operated in the visible from the French-Italian Concordia station at Dome C of Antarctica. This site has proven in the last few years to offer excellent atmospheric seeing conditions for high spatial resolution observations. The coronagraphic performances obtained from laboratory experiments and numerical models have been compared with those measured from daytime on-sky data recorded on bright single and multiple stars: Canopus (HD 45348), and alpha Centauri (HD 128620J). No correction system was used (adaptive optics or tip-tilt mirror) so that atmospheric turbulence alone defines the image quality, and thus the coronagraphic performances. Moreover, the experiment could not run under optimal operational conditions due to hardware/software problems. Satisfactory results have been obtained: broad band total rejection exceeding 15 were attained in the visible. This first day-time observation campaign yields an experimental feedback on how to improve the instrument to get optimal performances during future night-time observation runs.
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