论文标题
将点扩展功能重建为一个新级别。应用于球/Zimpol
Pushing Point spread function reconstruction to the next level. Application to SPHERE/ZIMPOL
论文作者
论文摘要
点扩散函数（PSF）重建（PSF-R）是一种已建立的技术，可从自适应光学（AO）控制循环数据可靠，准确地确定PSF。我们已经成功地应用了这项技术，以提高光度法和天体的精度，以观察用球/Zimpol获得的NGC6121，因为它将在即将到来的字母中介绍。首先，我们介绍了使用我们的PSF-R方法Prime（Beltramo-Martin等人，2019年）重建PSF的方法，从而将PPOPIL-PLANE和焦平面测量结合在一起，并升级了模型和最佳拟合步骤。其次，我们强调说，Prime允许在2小时观察过程中维持PSF拟合剩余的0.2％，并且仅使用30 s的AO遥测方法，这可能会对未来30-40 m级望远镜的PSF-R目的产生重要的后果。最后，我们使用淡淡的恒星将Prime部署在更逼真的状态下，以确定初始猜测参数所需的精度，以确保收敛到最佳解决方案。
Point spread function (PSF) reconstruction (PSF-R) is a well established technique to determine reliably and accurately the PSF from Adaptive Optics (AO) control loop data. We have successfully applied this technique to improve the precision on photometry and astrometry to observation of NGC6121 obtained with SPHERE/ZIMPOL as it will be presented in a forthcoming letter. Firstly, we present the methodology we followed to reconstruct the PSF combining pupil-plane and focal-plane measurements using using our PSF-R method PRIME (Beltramo-Martin et al. 2019), with upgrade of both the model and best-fitting steps compared to previous papers. Secondly, we highlight that PRIME allows to maintain the PSF fitting residual below 0.2% over 2 hours of observation and using only 30 s of AO telemetry, which may have important consequences for telemetry storage for PSF-R purpose on future 30-40 m class telescopes. Finally, we deploy PRIME in a more realistic regime using faint stars so as to identify the precision needed on the initial guess parameters to ensure the convergence towards the optimal solution.
