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- Title
Hitomi HXT deconvolution imaging of the Crab Nebula dazzled by the Crab pulsar.
- Authors
Morii, Mikio; Maeda, Yoshitomo; Awaki, Hisamitsu; Hagino, Kouichi; Ishida, Manabu; Mori, Koji
- Abstract
We develop a new deconvolution method to recover the precise Crab Nebula image taken by the Hitomi HXT, suppressing the artifact due to the bright Crab pulsar. We extend the Richardson–Lucy method, introducing two components corresponding to the nebula and pulsar with regularization for smoothness and flux, respectively, and performing simultaneous deconvolution of multi-pulse-phase images. The structures, including the torus and jets, seen in the deconvolved nebula image at the lowest energy band of 3.6–15 keV appear consistent with those identified in the high-resolution Chandra X-ray image. Above 15 keV, we confirm NuSTAR's findings that the nebula size decreases in higher energy bands. We find that the north-east side of the nebula is fainter in higher energy bands. Our deconvolution method is applicable for any telescope images of faint diffuse objects containing a bright point source.
- Subjects
CRAB Nebula; DECONVOLUTION (Mathematics); ENERGY bands; X-ray imaging; TORUS; IMAGE processing; NEBULAE
- Publication
Publications of the Astronomical Society of Japan, 2024, Vol 76, Issue 2, p272
- ISSN
0004-6264
- Publication type
Article
- DOI
10.1093/pasj/psae008