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
    Country/TerritoryUnited States
    CitySan Diego
    Period06/08/201710/08/2017
    Internet address
    SeriesProceedings of SPIE - The International Society for Optical Engineering
    ISSN0277-786X

    Keywords

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

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