2019年1月
An image reconstruction method for an X-ray telescope system with an angular resolution booster
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
- ,
- ,
- 巻
- 71
- 号
- 1
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1093/pasj/psy143
- 出版者・発行元
- OXFORD UNIV PRESS
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.
- リンク情報
- ID情報
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- DOI : 10.1093/pasj/psy143
- ISSN : 0004-6264
- eISSN : 2053-051X
- ORCIDのPut Code : 157249133
- Web of Science ID : WOS:000462721500017