Reflectivity around the gold L-edges of X-ray reector of the soft X-ray telescope onboard ASTRO-H

Yoshitomo Maeda, Naomichi Kikuchi, Sho Kurashima, Manabu Ishida, Ryo Iizuka, Takayuki Hayashi, Takashi Okajima, Hironori Matsumoto, Ikuyuki Mitsuishi, Shigetaka Saji, Toshiki Sato, Sasagu Tachibana, Hideyuki Mori, Finn Erland Christensen, Nicolai Brejnholt, Kiyofumi Nitta, Tomoya Uruga

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Abstract

We report the atomic scattering factor in the 11.2-15.4 keV for the ASTRO-H Soft X-ray Telescope (SXT)9 obtained in the ground based measurements. The large effective area of the SXT covers above 10 keV. In fact, the flight data show the spectra of the celestical objects in the hard X-ray band. 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 beamline 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 gold′ s L-I, II, and III transitions are identified, of which the depths are found to be roughly 60% shallower than those expected from the Henke's atomic scattering factor.
Original languageEnglish
Title of host publicationOptics for EUV, X-Ray, and Gamma-Ray Astronomy VIII
Editors Stephen L. O'Dell, Giovanni Pareschi
Number of pages9
Volume10399
PublisherSPIE - International Society for Optical Engineering
Publication date2017
Article number103990Q
DOIs
Publication statusPublished - 2017
EventSPIE Optics + Photonics 2017 - San Diego, United States
Duration: 6 Aug 201710 Aug 2017
http://spie.org/conferences-and-exhibitions/past-conferences-and-exhibitions/optics-and-photonics-2017

Conference

ConferenceSPIE Optics + Photonics 2017
CountryUnited States
CitySan Diego
Period06/08/201710/08/2017
Internet address
SeriesProceedings of S P I E - International Society for Optical Engineering
Volume10399
ISSN0277-786X

Keywords

  • X-Rays
  • ATRO-H/Hitomi
  • Soft X-ray telescopes (SXTs)
  • Wolter type-I optics
  • Stray lights

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