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Atomic Scattering Factor of the ASTRO-H (Hitomi) SXT Reflector Around the Gold's L EdgesThe atomic scattering factor in the energy range of 11.2 - 15.4 keV for the ASTRO-H Soft X-ray Telescope (SXT) is reported. The large effective area of the SXT makes use of photon spectra above 10 keV viable, unlike most other X-ray satellites with total-reflection mirror optics. Presence of gold's L-edges in the energy band is a major issue, as it complicates the function of the effective area. In order to model the area, the reflectivity measurements in the 11.2 - 15.4 keV band with the energy pitch of 0.4 - 0.7 eV were made in the synchrotron beam-line Spring-8 BL01B1. We obtained atomic scattering factors f1 and f2 by the curve fitting to the reflectivities of our witness sample. The edges associated with the L-I, II, and III transitions are identified, of which the depths are found to be roughly 60 shallower than those expected from the Henkes atomic scattering factor.
Document ID
20170003471
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Kikuchi, Naomichi
(Tokyo Metropolitan Univ. Hachiouji, Japan)
Kurashima, Sho
(Tokyo Metropolitan Univ. Hachiouji, Japan)
Ishida, Manabu
(Tokyo Metropolitan Univ. Hachiouji, Japan)
Iizuka, Ryo
(Tokyo Metropolitan Univ. Hachiouji, Japan)
Maeda, Yoshitomo
(Tokyo Metropolitan Univ. Hachiouji, Japan)
Hayashi, Takayuki
(Nagoya Univ. Nagoya, Japan)
Okajima, Takashi
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Matsumoto, Hironori
(Nagoya Univ. Nagoya, Japan)
Mitsubishi, Ikuyuki
(Nagoya Univ. Nagoya, Japan)
Saji, Shigetaka
(Nagoya Univ. Nagoya, Japan)
Date Acquired
April 14, 2017
Publication Date
October 24, 2016
Publication Information
Publication: Optics Express
Publisher: OSA Publishing
Volume: 24
Issue: 22
ISSN: 1094-4087
Subject Category
Astrophysics
Optics
Report/Patent Number
GSFC-E-DAA-TN41302
Funding Number(s)
CONTRACT_GRANT: NNG17PT01A
Distribution Limits
Public
Copyright
Other
Keywords
ASTRO-H Soft X-ray

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