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Reflectivity Around the Gold M-Edges of X-ray Reflector of the Soft X-Ray Telescope Onboard ASTRO-HThe 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. 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.
Document ID
20170006055
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
External Source(s)
Authors
Kurashimaa, Sho
(Tokyo Metropolitan Univ. Hachiouji, Japan)
Furuzawa, Akihiro
(Nagoya Univ. Nagoya, Japan)
Sato, Toshiki
(Tokyo Metropolitan Univ. Hachiouji, Japan)
Kikuchia, Naomichi
(Tokyo Metropolitan Univ. Hachiouji, Japan)
Nakaniwaa, Nozomi
(Tokyo Metropolitan Univ. Hachiouji, Japan)
Maeda, Yoshitomo
(Tokyo Univ. Sagamihara, Japan)
Ishida, Manabu
(Tokyo Univ. Sagamihara, Japan)
Izuka, Ryo
(Tokyo Univ. Sagamihara, Japan)
Okajima, Takashi
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Mori, Hideyuki
(Maryland Univ. Baltimore County Baltimore, MD, United States)
Matsumoto, Hironori
(Nagoya Univ. Nagoya, Japan)
Tamura, Keisuke
(Nagoya Univ. Nagoya, Japan)
Ishibashi, Kazunori
(Nagoya Univ. Nagoya, Japan)
Hayashi, Takayuki
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Miyazawa, Takuya
(Nagoya Univ. Nagoya, Japan)
Maejima, Masato
(Nagoya Univ. Nagoya, Japan)
Yoshikawa, Shun
(Nagoya Univ. Nagoya, Japan)
Date Acquired
July 3, 2017
Publication Date
July 11, 2016
Publication Information
Publication: SPIE Proceedings
Publisher: SPIE
Volume: 9905
Subject Category
Optics
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN43769
Meeting Information
Meeting: Space Telescopes and Instrumentation 2016 Conference
Location: Edinburgh
Country: United Kingdom
Start Date: June 26, 2016
Sponsors: International Society for Optical Engineering
Funding Number(s)
CONTRACT_GRANT: NNG17PT01A
Distribution Limits
Public
Copyright
Other
Keywords
ASTRO-H
Re
X-ray optics
Soft X-ray Telescope

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