论文标题
角差
Angular differential kernel phases
论文作者
论文摘要
为了达到最佳性能，Fizeau干涉法要求我们通过校准来解决仪器偏见。高对比度成像中使用的一种常见技术是角度差成像，它使用焦平面中的旋转来校准点扩散函数和通量泄漏。 我们的目的是在实验中证明和验证角度差异内相方法的功效，这是一种自我校准干涉量可观察物的新方法，该方法与角度差异成像相似，同时保留其统计特性。 我们使用线性代数来构建新的可观察物，这些可观察物在静态偏见跨越的子空间之外发展。使用Subaru望远镜的SCEXAO仪器对二元恒星的天线观察被用来证明该技术的实用性。我们在相同数据上使用了经典方法来比较该方法的有效性。 与经典校准方法相比，所提出的方法显示出更小，更高的残留物，同时保留了与可用统计工具的兼容性。我们还提供了与技术应用有关的SCEXAO仪器的稳定性的测量。 角差分核相为校准有偏见的可观察物提供了可靠的方法。尽管对于小场旋转而降低了小分离的灵敏度，但校准有效地改善了，主观选择的数量减少了。
To reach its optimal performance, Fizeau interferometry requires that we work to resolve instrumental biases through calibration. One common technique used in high contrast imaging is angular differential imaging, which calibrates the point spread function and flux leakage using a rotation in the focal plane. Our aim is to experimentally demonstrate and validate the efficacy of an angular differential kernel-phase approach, a new method for self-calibrating interferometric observables that operates similarly to angular differential imaging, while retaining their statistical properties. We used linear algebra to construct new observables that evolve outside of the subspace spanned by static biases. On-sky observations of a binary star with the SCExAO instrument at the Subaru telescope were used to demonstrate the practicality of this technique. We used a classical approach on the same data to compare the effectiveness of this method. The proposed method shows smaller and more Gaussian residuals compared to classical calibration methods, while retaining compatibility with the statistical tools available. We also provide a measurement of the stability of the SCExAO instrument that is relevant to the application of the technique. Angular differential kernel phases provide a reliable method for calibrating biased observables. Although the sensitivity at small separations is reduced for small field rotations, the calibration is effectively improved and the number of subjective choices is reduced.
