用于行星伴星高对比度成像的日内瓦缩减和分析管道
The Geneva Reduction and Analysis Pipeline for High-contrast Imaging of planetary Companions
摘要：
我们提出了GRAPHIC，一个新的角度差分成像（ADI）减少管道，其中所有的几何图像操作是基于傅立叶变换。为了实现这一目标，整个流水线是并行的，从而可以减少大量的观察数据，而无需对数据进行分箱。介绍了基于傅立叶变换的旋转和平移算法，并与传统插值算法进行了性能比较。使用注入真实科学帧中的假同伴的测试表明，与传统插值相比，使用基于傅立叶变换的几何运算获得了显着的增益。这也转化为相对于常规减少流水线的更好的点扩散函数和斑点减除，实现了与当前最佳性能流水线相当的检测极限。还证明了同伴的通量守恒。该管道目前能够减少VLT/NACO，Gemini/NICI，VLT/SPHERE和Subaru/SCExAO产生的科学数据。
英文摘要：
We present GRAPHIC, a new angular differential imaging (ADI) reduction pipeline where all geometric image operations are based on Fourier transforms. To achieve this goal the entire pipeline is parallelised making it possible to reduce large amounts of observation data without the need to bin the data. The specific rotation and shift algorithms based on Fourier transforms are described and performance comparison with conventional interpolation algorithm are given. Tests using fake companions injected in real science frames demonstrate the significant gain obtained by using geometric operations based on Fourier transforms compared to conventional interpolation. This also translates in a better point spread function and speckle subtraction with respect to conventional reduction pipelines, achieving detection limits comparable to current best performing pipelines. Flux conservation of the companions is also demonstrated. This pipeline is currently able to reduce science data produced by VLT/NACO, Gemini/NICI, VLT/SPHERE, and Subaru/SCExAO.
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。
