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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >An image reconstruction method for an X-ray telescope system with an angular resolution booster
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An image reconstruction method for an X-ray telescope system with an angular resolution booster

机译：具有角度分辨率助力器的X射线望远镜系统的图像重建方法

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We propose an image reconstruction method for an X-ray telescope system with an angular resolution booster proposed by Maeda et al. (2018, PASJ, submitted). The system consists of double multi-grid masks in front of an X-ray mirror and an off-focused two-dimensional imager. Because the obtained image is off-focused, an additional image reconstruction process is assumed to be included. Our image reconstruction method is an extension of the traditional Richardson-Lucy algorithm with two regularization terms, one for sparseness and the other for smoothness. Such a combination is desirable for astronomical imaging because astronomical objects have a variety in shape, from point sources to diffuse sources to mixtures of both. The performance of the system is demonstrated with simulated data for point sources and diffuse X-ray sources such as Cas A and the Crab Nebula. The image resolution is improved from a few arcmin of focused image without the booster to a few arcsec with the booster. Through the demonstration, the angular resolution booster with the image reconstruction method is shown to be feasible.
机译：我们提出了一种具有由Maeda等人提出的角度分辨率助力器的X射线望远镜系统的图像重建方法。 （2018，PASJ，提交）。该系统由X射线镜前面的双重多电网掩模和非聚焦二维成像器组成。因为所获得的图像被关除，所以假设包括附加的图像重建过程。我们的图像重建方法是传统的Richardson-Lucy算法的扩展，具有两个正则化术语，一个用于稀疏性，另一个用于平滑度。这种组合对于天文成像是期望的，因为天文对象具有各种形状，从点源到漫射源到两者的混合物。系统的性能与点源和漫射X射线源（如CAS A和蟹星云）进行了说明的。图像分辨率从没有升压器的聚焦图像的几个弧散到几个弧形与助推器的弧度。通过演示，具有图像重建方法的角度分辨率升压被认为是可行的。

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