Hitomi-HXT deconvolution imaging of the Crab Nebula dazzled by the Crab pulsar
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866911759330181120 |
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| author | Morii, Mikio Maeda, Yoshitomo Awaki, Hisamitsu Hagino, Kouichi Ishida, Manabu Mori, Koji |
| author_facet | Morii, Mikio Maeda, Yoshitomo Awaki, Hisamitsu Hagino, Kouichi Ishida, Manabu Mori, Koji |
| contents | We develop a new deconvolution method to improve the angular resolution of the Crab Nebula image taken by the Hitomi HXT. Here, we extend the Richardson-Lucy method by introducing two components for the nebula and the Crab pulsar with regularization for smoothness and flux, respectively, and deconvolving multi-pulse-phase images simultaneously. The deconvolved nebular image at the lowest energy band of 3.6--15 keV looks consistent with the Chandra X-ray image. Above 15 keV, we confirm that the NuSTAR's findings that the nebula size decreases in higher energy bands. We find that the north-east side of the nebula becomes dark in higher energy bands. Our deconvolution method can be applicable for any telescope images of faint diffuse objects containing a bright point source. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2401_08278 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Hitomi-HXT deconvolution imaging of the Crab Nebula dazzled by the Crab pulsar Morii, Mikio Maeda, Yoshitomo Awaki, Hisamitsu Hagino, Kouichi Ishida, Manabu Mori, Koji High Energy Astrophysical Phenomena We develop a new deconvolution method to improve the angular resolution of the Crab Nebula image taken by the Hitomi HXT. Here, we extend the Richardson-Lucy method by introducing two components for the nebula and the Crab pulsar with regularization for smoothness and flux, respectively, and deconvolving multi-pulse-phase images simultaneously. The deconvolved nebular image at the lowest energy band of 3.6--15 keV looks consistent with the Chandra X-ray image. Above 15 keV, we confirm that the NuSTAR's findings that the nebula size decreases in higher energy bands. We find that the north-east side of the nebula becomes dark in higher energy bands. Our deconvolution method can be applicable for any telescope images of faint diffuse objects containing a bright point source. |
| title | Hitomi-HXT deconvolution imaging of the Crab Nebula dazzled by the Crab pulsar |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2401.08278 |