Reflectivity around the gold M-edges of x-ray reflector of the Soft X-ray Telescope onboard ASTRO-H

Sho Kurashima, Akihiro Furuzawa, Toshi Ki Sato, Naomichi Kikuchi, Nozomi Nakaniwa, Yoshitomo Maeda, Manabu Ishida, Ryo Iizuka, Takashi Okajima, Hideyuki Mori, Hironori Matsumoto, Keisuke Tamura, Kazunori Ishibashi, Takayuki Hayashi, Takuya Miyazawa, Masato Maejima, Shun Yoshikawa

研究成果: Conference contribution

6 被引用数 (Scopus)


The X-ray astronomy satellite ASTRO-H are equipped with two equivalent soft X-ray telescopes (SXT-I and SXT-S) which cover the energy band 0.3{12 keV. The X-ray reflectors of the SXTs are coated with a gold monolayer by means of the replication technique (Okajima et al. in this volume). A series of gold M absorption edges in the 2-4 keV band causes complex structures in the energy response of the SXTs. In the same band, there are astrophysically important emission lines from Si, Ar and S. Since the SXS has unprecedentedly high spectral resolution, we have measured the reflectivity around the gold M-edges in an extremely fine energy pitch at the synchrotron radiation facility KEK PF BL11-B, with the 2 eV pitch in 2100 eV to 4100 eV band that covers the entire series of the absorption edges (M-I through M-V) at grazing incident angles to the reflectors of 0.5, 0.8, 1.0, 1.2, 1.4 degree, and with a finer pitch of 0.25 eV in the 2200 eV to 2350 eV band where the two deepest M-IV and M-V edges are included. In the resultant reflectivity curves, we have clearly identified the fine structures associated with all the M-edges. Using these data, we calculated atomic scattering factor f1 as a function of X-ray energy, with which we have built the mirror response function which can be applied to the Suzaku spectra. As a result, we have found that discrepancy of the spectral model to the Suzaku data of 4U1630-472 (a black hole transient) and the Crab nebula around the M-edges are significantly reduced from those with the official Suzaku response.

ホスト出版物のタイトルSpace Telescopes and Instrumentation 2016
ホスト出版物のサブタイトルUltraviolet to Gamma Ray
編集者Marshall Bautz, Tadayuki Takahashi, Jan-Willem A. den Herder
出版ステータスPublished - 2016
イベントSpace Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray - Edinburgh, United Kingdom
継続期間: 26-06-201601-07-2016


名前Proceedings of SPIE - The International Society for Optical Engineering


OtherSpace Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray
国/地域United Kingdom

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学


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