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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationSpace Telescopes and Instrumentation 2016
Subtitle of host publicationUltraviolet to Gamma Ray
EditorsMarshall Bautz, Tadayuki Takahashi, Jan-Willem A. den Herder
PublisherSPIE
Volume9905
ISBN (Electronic)9781510601895
DOIs
Publication statusPublished - 01-01-2016
Externally publishedYes
EventSpace Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray - Edinburgh, United Kingdom
Duration: 26-06-201601-07-2016

Other

OtherSpace Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray
CountryUnited Kingdom
CityEdinburgh
Period26-06-1601-07-16

Fingerprint

X-ray Telescopes
Soft X-ray
Reflector
Reflectivity
Gold
Telescopes
reflectors
telescopes
gold
reflectance
X rays
Energy
x rays
Absorption
Lattice vibrations
X-ray Astronomy
Astronomy
Cover
Spectral resolution
Synchrotron radiation

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Kurashima, S., Furuzawa, A., Sato, T. K., Kikuchi, N., Nakaniwa, N., Maeda, Y., ... Yoshikawa, S. (2016). Reflectivity around the gold M-edges of x-ray reflector of the Soft X-ray Telescope onboard ASTRO-H. In M. Bautz, T. Takahashi, & J-W. A. den Herder (Eds.), Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray (Vol. 9905). [99053Y] SPIE. https://doi.org/10.1117/12.2231173
Kurashima, Sho ; Furuzawa, Akihiro ; Sato, Toshi Ki ; Kikuchi, Naomichi ; Nakaniwa, Nozomi ; Maeda, Yoshitomo ; Ishida, Manabu ; Iizuka, Ryo ; Okajima, Takashi ; Mori, Hideyuki ; Matsumoto, Hironori ; Tamura, Keisuke ; Ishibashi, Kazunori ; Hayashi, Takayuki ; Miyazawa, Takuya ; Maejima, Masato ; Yoshikawa, Shun. / Reflectivity around the gold M-edges of x-ray reflector of the Soft X-ray Telescope onboard ASTRO-H. Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray. editor / Marshall Bautz ; Tadayuki Takahashi ; Jan-Willem A. den Herder. Vol. 9905 SPIE, 2016.
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abstract = "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.",
author = "Sho Kurashima and Akihiro Furuzawa and Sato, {Toshi Ki} and Naomichi Kikuchi and Nozomi Nakaniwa and Yoshitomo Maeda and Manabu Ishida and Ryo Iizuka and Takashi Okajima and Hideyuki Mori and Hironori Matsumoto and Keisuke Tamura and Kazunori Ishibashi and Takayuki Hayashi and Takuya Miyazawa and Masato Maejima and Shun Yoshikawa",
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Kurashima, S, Furuzawa, A, Sato, TK, Kikuchi, N, Nakaniwa, N, Maeda, Y, Ishida, M, Iizuka, R, Okajima, T, Mori, H, Matsumoto, H, Tamura, K, Ishibashi, K, Hayashi, T, Miyazawa, T, Maejima, M & Yoshikawa, S 2016, Reflectivity around the gold M-edges of x-ray reflector of the Soft X-ray Telescope onboard ASTRO-H. in M Bautz, T Takahashi & J-WA den Herder (eds), Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray. vol. 9905, 99053Y, SPIE, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray, Edinburgh, United Kingdom, 26-06-16. https://doi.org/10.1117/12.2231173

Reflectivity around the gold M-edges of x-ray reflector of the Soft X-ray Telescope onboard ASTRO-H. / Kurashima, Sho; Furuzawa, Akihiro; Sato, Toshi Ki; Kikuchi, Naomichi; Nakaniwa, Nozomi; Maeda, Yoshitomo; Ishida, Manabu; Iizuka, Ryo; Okajima, Takashi; Mori, Hideyuki; Matsumoto, Hironori; Tamura, Keisuke; Ishibashi, Kazunori; Hayashi, Takayuki; Miyazawa, Takuya; Maejima, Masato; Yoshikawa, Shun.

Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray. ed. / Marshall Bautz; Tadayuki Takahashi; Jan-Willem A. den Herder. Vol. 9905 SPIE, 2016. 99053Y.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AU - Furuzawa, Akihiro

AU - Sato, Toshi Ki

AU - Kikuchi, Naomichi

AU - Nakaniwa, Nozomi

AU - Maeda, Yoshitomo

AU - Ishida, Manabu

AU - Iizuka, Ryo

AU - Okajima, Takashi

AU - Mori, Hideyuki

AU - Matsumoto, Hironori

AU - Tamura, Keisuke

AU - Ishibashi, Kazunori

AU - Hayashi, Takayuki

AU - Miyazawa, Takuya

AU - Maejima, Masato

AU - Yoshikawa, Shun

PY - 2016/1/1

Y1 - 2016/1/1

N2 - 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.

AB - 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.

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Kurashima S, Furuzawa A, Sato TK, Kikuchi N, Nakaniwa N, Maeda Y et al. Reflectivity around the gold M-edges of x-ray reflector of the Soft X-ray Telescope onboard ASTRO-H. In Bautz M, Takahashi T, den Herder J-WA, editors, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray. Vol. 9905. SPIE. 2016. 99053Y https://doi.org/10.1117/12.2231173