Updated on 2023/11/15

写真a

 
YONEYAMA Tomokage
 
Organization
Faculty of Science and Engineering Research Associate
Contact information
The inquiry by e-mail is 《here
External link

Degree

  • 博士(理学) ( 大阪大学 )

  • 修士(理学) ( 大阪大学 )

Education

  • 2021.3
     

    Osaka University   doctor course   completed

  • 2018.3
     

    Osaka University   master course   completed

  • 2016.3
     

    Osaka University   graduated

Research History

  • 2023.4 - Now

    Chuo University   Department of Physics, Faculty of Science and Engineering   Assistant Professor

  • 2021.4 - 2023.3

    Japan Aerospace Exploration Agency   Institute of Space and Astronautical Science

  • 2018.4 - 2021.3

    JSPS

Professional Memberships

  • 2022.4 - Now

    High Energy AstroPhysics Association in Japan

  • 2016.9 - Now

    The Physical Society of Japan

  • 2016.9 - Now

    The Astronomical Society of Japan

Research Interests

  • X線偏光計

  • X線連星

  • X線干渉計

  • 人工衛星

  • Neutron star

  • 半導体検出器

  • X-ray Astronomy

  • Astrophysics

Research Areas

  • Natural Science / Astronomy  / X-ray Astronomy

  • Natural Science / Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics  / Astrophysics

Papers

  • GEOspace X-ray imager (GEO-X) Reviewed

    Yuichiro Ezoe, Ryu Funase, Harunori Nagata, Yoshizumi Miyoshi, Hiroshi Nakajima, Ikuyuki Mitsuishi, Kumi Ishikawa, Masaki Numazawa, Yosuke Kawabata, Shintaro Nakajima, Ryota Fuse, Ralf C. Boden, Landon Kamps, Tomokage Yoneyama, Kouichi Hagino, Yosuke Matsumoto, Keisuke Hosokawa, Satoshi Kasahara, Junko Hiraga, Kazuhisa Mitsuda, Masaki Fujimoto, Munetaka Ueno, Atsushi Yamazaki, Hiroshi Hasegawa, Takefumi Mitani, Yasuhiro Kawakatsu, Takahiro Iwata, Hiroyuki Koizumi, Hironori Sahara, Yoshiaki Kanamori, Kohei Morishita, Daiki Ishi, Aoto Fukushima, Ayata Inagaki, Yoko Ueda, Hiromi Morishita, Yukine Tsuji, Runa Sekiguchi, Takatoshi Murakawa, Kazuma Yamaguchi, Rei Ishikawa, Daiki Morimoto, Yudai Yamada, Shota Hirai, Yuki Nobuhara, Yownin Albert M. Leung, Yamato Itoigawa, Ryo Onodera, Satoru Kotaki, Shotaro Nakamura, Ayumi Kiuchi, Takuya Matsumoto, Midori Hirota, Kazuto Kashiwakura

    Journal of Astronomical Telescopes, Instruments, and Systems   9 ( 03 )   2023.9

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    Publishing type:Research paper (scientific journal)   Publisher:SPIE-Intl Soc Optical Eng  

    DOI: 10.1117/1.jatis.9.3.034006

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  • Multi-image x-ray interferometer module: I. Design concept and proof-of-concept experiments with fine-pitch slits Reviewed

    Kazunori Asakura, Kiyoshi Hayashida, Tomoki Kawabata, Yoneyama Tomokage, Hirofumi Noda, Hironori Matsumoto, Hiroshi Tsunemi, Hiroshi Nakajima, Hisamitsu Awaki, Junko S. Hiraga

    Journal of Astronomical Telescopes, Instruments, and Systems   9 ( 02 )   2023.5

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    Publishing type:Research paper (scientific journal)   Publisher:SPIE-Intl Soc Optical Eng  

    DOI: 10.1117/1.jatis.9.2.025004

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  • Simulation Study of Pulse Height Difference Between Pixel Patterns of X-ray CCDs Onboard the XRISM Satellite

    Yuma Aoki, Yamato Ito, Masayoshi Nobukawa, Yoshiaki Kanemaru, Keitaro Miyazaki, Kohei Kusunoki, Koji Mori, Tomokage Yoneyama, Tsubasa Tamba, Hiroshi Tomida, Hiroshi Nakajima, Hironori Matsumoto, Hirofumi Noda, Kiyoshi Hayashida, Hiroyuki Uchida, Takaaki Tanaka, Hiromasa Suzuki, Tessei Yoshida, Hiroshi Murakami, Makoto Yamauchi, Isamu Hatsukade, Kouichi Hagino, Takayoshi Kohmura, Hideki Uchiyama, Kazutaka Yamaoka, Masanobu Ozaki, Tadayasu Dotani, Hiroshi Tsunemi, Kumiko Nobukawa, Takeshi Tsuru, Shogo Kobayashi, Junko Hiraga

    Proceedings of 10th International Workshop on Semiconductor Pixel Detectors for Particles and Imaging — PoS(Pixel2022)   2023.3

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    Publishing type:Research paper (international conference proceedings)   Publisher:Sissa Medialab  

    DOI: 10.22323/1.420.0036

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  • X-ray spectroscopy of the accretion disk corona source 2S 0921−630 with Suzaku archival data Reviewed

    Tomokage Yoneyama, Tadayasu Dotani

    Publications of the Astronomical Society of Japan   75 ( 1 )   30 - 36   2022.11

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    Authorship:Lead author   Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press (OUP)  

    Abstract

    2S 0921−630 is an eclipsing low-mass X-ray binary (LMXB) with an orbital period of ∼9 d. Past X-ray observations have revealed that 2S 0921−630 has an extended accretion disk corona (ADC), from which most of the X-rays from the system are emitted. We report the result of our Suzaku archival data analysis of 2S 0921−630. The average X-ray spectrum is reproduced with a blackbody emission (kTbb ∼ 0.3 keV) Comptonized by optically thick gas (“Compton cloud”; optical depth τ ∼ 21) with a temperature of ∼2 keV, combined with 13 emission lines. We find that most of the emission lines correspond to highly ionized atoms: O, Ne, Mg, Si, S, Ar, and Fe. A Kα emission line and an absorption edge of semi-neutral iron (Fe  textsci– textscxvii) are also detected. The semi-neutral iron Kα line is significantly broad, with a width of 0.11 ± 0.02 keV in sigma, which corresponds to the Doppler broadening by the Kepler motion at a radius of ∼109 cm. We suggest that the observed semi-neutral iron line originates at the inner part of the accretion disk in the immediate outside of the Compton cloud, i.e., the Compton cloud may have a radius of ∼109 cm.

    DOI: 10.1093/pasj/psac086

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  • Xappl: software framework for the XRISM pre-pipeline

    Satoshi Eguchi, Makoto Tashiro, Yukikatsu Terada, Hiromitsu Takahashi, Masayoshi Nobukawa, Tsunefumi Mizuno, Shin'ichiro Uno, Aya Kubota, Kazuhiro Nakazawa, Shin Watanabe, Ryo Iizuka, Rie Sato, Tomokage Yoneyama, Chris Baluta, Ken Ebisawa, Yasushi Fukazawa, Katsuhiro Hayashi, So Kato, Satoru Katsuda, Takao Kitaguchi, Hirokazu Odaka, Masanori Ohno, Naomi Ota, Minami Sakama, Ryohei Sato, Megumi Shidatsu, Yasuharu Sugawara, Tsubasa Tamba, Atsushi Tanimoto, Yuichi Terashima, Yohko Tsuboi, Nagomi Uchida, Yuusuke Uchida, Hideki Uchiyama, Shigeo Yamauchi, Masaaki Sakano, Tessei Yoshida, Satoshi Yamada

    Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray   2022.8

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    Publishing type:Research paper (international conference proceedings)   Publisher:SPIE  

    DOI: 10.1117/12.2629316

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  • Development of the focal-plane CMOS detector for the GEO-X mission

    Hiroshi Nakajima, Shotaro Nakamura, Koichi Hagino, Ayumi Kiuchi, Takuya Matsumoto, Tohya Yamagami, Tomokage Yoneyama, Junko Hiraga, Yuichiro Ezoe, Kumi Ishikawa

    Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray   2022.8

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    Publishing type:Research paper (international conference proceedings)   Publisher:SPIE  

    DOI: 10.1117/12.2628788

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  • Sub-arcsecond x-ray imaging with multi-Image x-ray interferometer module (MIXIM): introduction of a periodic coded-aperture mask

    Kazunori Asakura, Kiyoshi Hayashida, Shotaro Sakuma, Ayami Ishikura, Kenmei Sawagami, Wataru Kamogawa, Tomokage Yoneyama, Hirofumi Noda, Koki Okazaki, Maho Hanaoka, Kengo Hattori, Yusuke Matsushita, Taisei Mineta, Marina Yoshimoto, Yuichi Ode, Tomohiko Hakamata, Hironori Matsumoto, Hiroshi Tsunemi

    Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray   2022.8

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    Publishing type:Research paper (international conference proceedings)   Publisher:SPIE  

    DOI: 10.1117/12.2629656

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  • Xtend, the soft x-ray imaging telescope for the x-ray imaging and spectroscopy mission (XRISM)

    Koji Mori, Hiroshi Tomida, Hiroshi Nakajima, Takashi Okajima, Hirofumi Noda, Takaaki Tanaka, Hiroyuki Uchida, Kouichi Hagino, Shogo B. Kobayashi, Hiromasa Suzuki, Tessei Yoshida, Hiroshi Murakami, Hideki Uchiyama, Masayoshi Nobukawa, Kumiko K. Nobukawa, Tomokage Yoneyama, Hironori Matsumoto, Takeshi G. Tsuru, Makoto Yamauchi, Isamu Hatsukade, Manabu Ishida, Yoshitomo Maeda, Takayuki Hayashi, Keisuke Tamura, Rozenn Boissay-Malaquin, Toshiki Sato, Junko Hiraga, Takayoshi Kohmura, Kazutaka Yamaoka, Tadayasu Dotani, Masanobu Ozaki, Hiroshi Tsunemi, Yoshiaki Kanemaru, Jin Sato, Toshiyuki Takaki, Yuta Terada, Keitaro Miyazaki, Kohei Kusunoki, Yoshinori Otsuka, Haruhiko Yokosu, Wakana Yonemaru, Yoh Asahina, Kazunori Asakura, Marina Yoshimoto, Yuichi Ode, Junya Sato, Tomohiko Hakamata, Mio Aoyagi, Yuma Aoki, Shun Tsunomachi, Toshiki Doi, Daiki Aoki, Kaito Fujisawa, Masatoshi Kitajima, Kiyoshi Hayashida

    Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray   2022.8

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    Publishing type:Research paper (international conference proceedings)   Publisher:SPIE  

    DOI: 10.1117/12.2626894

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  • GEO-X (GEOspace X-ray imager)

    Yuichiro Ezoe, Ryu Funase, Harunori Nagata, Yoshizumi Miyoshi, Hiroshi Nakajima, Ikuyuki Mitsuishi, Kumi Ishikawa, Yosuke Kawabata, Shintaro Nakajima, Landon Kamps, Masaki Numazawa, Tomokage Yoneyama, Kouichi Hagino, Yosuke Matsumoto, Keisuke Hosokawa, Satoshi Kasahara, Junko Hiraga, Kazuhisa Mitsuda, Masaki Fujimoto, Munetaka Ueno, Atsushi Yamazaki, Hiroshi Hasegawa, Takefumi Mitani, Yasuhiro Kawakatsu, Takahiro Iwata, Hiroyuki Koizumi, Hironori Sahara, Yoshiaki Kanamori, Kohei Morishita

    SPACE TELESCOPES AND INSTRUMENTATION 2022: ULTRAVIOLET TO GAMMA RAY   12181   2022

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:SPIE-INT SOC OPTICAL ENGINEERING  

    GEO-X (GEOspace X-ray imager) is a small satellite mission aiming at visualization of the Earth's magnetosphere by X-rays and revealing dynamical couplings between solar wind and magnetosphere. In-situ spacecraft have revealed various phenomena in the magnetosphere. In recent years, X-ray astronomy satellite observations discovered soft X-ray emission originated from the magnetosphere. We therefore develop GEO-X by integrating innovative technologies of the wide FOV X-ray instrument and the microsatellite technology for deep space exploration. GEO-X is a 50 kg class microsatellite carrying a novel compact X-ray imaging spectrometer payload. The microsatellite having a large delta v (>700 m/s) to increase an altitude at 40-60 R-E from relatively low-altitude (e.g., Geo Transfer Orbit) piggyback launch is necessary. We thus combine a 18U Cubesat with the hybrid kick motor composed of liquid N2O and polyethylene. We also develop a wide FOV (5x5 deg) and a good spatial resolution (10 arcmin) X-ray (0.3-2 keV) imager. We utilize a micromachined X-ray telescope, and a CMOS detector system with an optical blocking filter. We aim to launch the satellite around the 25th solar maximum.

    DOI: 10.1117/12.2629107

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  • Suzaku detection of solar wind charge exchange emission from a variety of highly ionized ions in an interplanetary coronal mass ejection Reviewed

    Kazunori Asakura, Hironori Matsumoto, Koki Okazaki, Tomokage Yoneyama, Hirofumi Noda, Kiyoshi Hayashida, Hiroshi Tsunemi, Hiroshi Nakajima, Satoru Katsuda, Daiki Ishi, Yuichiro Ezoe

    Publications of the Astronomical Society of Japan   73 ( 3 )   504 - 518   2021.3

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    Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press (OUP)  

    Abstract

    X-ray emission generated through solar-wind charge exchange (SWCX) is known to contaminate X-ray observation data, the amount of which is often significant or even dominant, particularly in the soft X-ray band, when the main target consists of comparatively weak diffuse sources, depending on the space weather during the observation. In particular, SWCX events caused by interplanetary coronal mass ejections (ICMEs) tend to be spectrally rich and to provide critical information about the metal abundance in the ICME plasma. We analyzed the SN1006 background data observed with Suzaku on 2005 September 11 shortly after an X6-class solar flare, signatures of which were separately detected together with an associated ICME. We found that the data include emission lines from a variety of highly ionized ions generated through SWCX. The relative abundances of the detected ions were found to be consistent with those in past ICME-driven SWCX events. Thus, we conclude that this event was ICME driven. In addition, we detected a sulfur xvi line for the first time as one from an SWCX emission, which suggests that it is the most spectrally rich SWCX event ever observed. We suggest that observations of ICME-driven SWCX events can provide a unique probe to study the population of highly ionized ions in the plasma, which is difficult to measure in currently available in situ observations.

    DOI: 10.1093/pasj/psab015

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  • Spatially resolved X-ray spectroscopy of the archetype type 2 active galactic nucleus NGC 1068 with Chandra Reviewed

    Ryo Nakata, Kiyoshi Hayashida, Hirofumi Noda, Tomokage Yoneyama, Hironori Matsumoto, Masatoshi Imanishi

    Publications of the Astronomical Society of Japan   73 ( 2 )   338 - 349   2021.2

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    Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press (OUP)  

    Abstract

    We investigate spatial distributions of iron Kα (Fe-Kα) lines in the cental 100 pc of the Seyfert 2 galaxy NGC 1068 observed with Chandra. The spatial distributions of Fe-Kα lines, neutral and highly ionized, around the center of the galactic nucleus are not isotropic, as consistently confirmed in both image and spectral analyses. The hydrogen number density of the gas clouds responsible for the neutral Fe-Kα line emission is estimated to be 102–103 cm−3 for the sampled regions near the galactic core. The photo-ionization model, where iron is assumed to be ionized by X-rays from the galactic nucleus, yields ionization parameters lower than 19 for these clouds. The range of this ionization parameter is two or three orders of magnitude lower than the theoretically expected value to produce the observed helium-like Fe-Kα line intensities. Therefore, the photo-ionization model is excluded from the explanation of the amount of highly ionized iron that is responsible for the observed Fe-Kα lines. Also, we find anti-correlation in the spatial distributions between the molecular cloud in the area observed with ALMA and that of the Fe-Kα lines, including that from neutral iron. We suggest that X-ray iron-line and radio molecular cloud observations are complementary to probe the distribution of matters in the central regions around the cores of active galactic nuclei.

    DOI: 10.1093/pasj/psab001

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  • Measuring the atomic scattering factors near the iridium L-edges for the Athena silicon pore optics reflector Reviewed

    Hisamitsu Awaki, Yoshitomo Maeda, Hironori Matsumoto, Sara Svendsen, Marcos Bavdaz, Maximilien Collon, Kazunori Asakura, Finn E. Christensen, Desiree D. M. Ferreira, Matteo Guainazzi, Masato Hoshino, Shuntaro Ide, Kazunori Ishibashi, Wansu Kan, Sonny Massahi, Takuya Miyazawa, Sadayuki Shimizu, Brian Shortt, Yusuke Takehara, Keisuke Tamura, Kentaro Uesugi, Richard Willingale, Tomokage Yoneyama, Atsushi Yoshida

    Journal of Astronomical Telescopes, Instruments, and Systems   7 ( 01 )   2021.1

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    Publishing type:Research paper (scientific journal)   Publisher:SPIE-Intl Soc Optical Eng  

    DOI: 10.1117/1.jatis.7.1.014001

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  • Screening and selection of XRISM/Xtend flight model CCD Reviewed

    Tomokage Yoneyama, Hirofumi Noda, Maho Hanaoka, Koki Okazaki, Kazunori Asakura, Kiyoshi Hayashida, Ayami Ishikura, Shotaro Sakuma, Kengo Hattori, Hironori Matsumoto, Koji Mori, Yoshiaki Kanemaru, Jin Sato, Toshiyuki Takaki, Hiroyuki Uchida, Takaaki Tanaka, Hiromichi Okon, Yuki Amano, Takeshi G. Tsuru, Hiroshi Tomida, Junko S. Hiraga, Yukino Urabe, Kumiko K. Nobukawa, Mariko Saito, Masayoshi Nobukawa, Takashi Sako, Hideki Uchiyama, Hiroshi Nakajima, Akira Kashimura, Shogo B. Kobayashi, Kouichi Hagino, Hiroshi Murakami

    Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment   985   164676 - 164676   2021.1

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    Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    X-ray Imaging Spectroscopy Mission (XRISM) is the next Japanese X-ray astronomical satellite to be launched in 2021 Japanese fiscal year. We are developing one of the XRISM instruments “Xtend”, which is an X-ray CCD camera combined with an X-ray telescope, and achieves the wide field of view of 38′×38′ in 0.4–13keV. In 2019, twelve flight-model (FM) candidate CCD chips were fabricated by Hamamatsu Photonics K.K. We conducted screening experiments to examine whether the FM candidates met requirements for the Xtend CCDs, and selected the four FM chips from them. We constructed a screening system, with which we can examine various CCD performances by illuminating characteristic X-ray lines in a ∼0.5–14keV band or optical lights. With this system, all the twelve candidates were confirmed to satisfy the requirements. We then selected four chips with the best performance, in terms of e.g., their charge transfer inefficiencies, energy resolutions, soft X-ray sensitivities, and optical light leakages. In this paper, we report an overview of the screening system, and procedures and results of the screening process.

    DOI: 10.1016/j.nima.2020.164676

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  • Sub-arcseconds to micro-arcsecond x-ray imaging with multi image x-ray interferometer method (MIXIM): concept and scalabe mission plans

    Kiyoshi Hayashida, Kazunori Asakura, Ayami Ishikura, Shotaro Sakuma, Takashi Hanasaka, Tomoki Kawabata, Tomokage Yoneyama, Hirofumi Noda, Koki Okazaki, Maho Hanaoka, Kengo Hattori, Kenmei Sawagami, Wataru Kamogawa, Hiroshi Nakajima, Yusuke Matsuhita, Taisei Mineta, Marina Yoshimoto, Tomohiko Hakamata, Yuichi Ode, Hironori Matsumoto, Hiroshi Tsunemi, Hisamitsu Awaki, Yuichi Terashima, Toshihiro Kawaguchi

    Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray   2020.12

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    Publishing type:Research paper (international conference proceedings)   Publisher:SPIE  

    DOI: 10.1117/12.2562193

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  • Subsub-arcseconds x-ray imaging with multi-image x-ray interferometer module (MIXIM): experimental results

    Kazunori Asakura, Kiyoshi Hayashida, Takashi Hanasaka, Tomoki Kawabata, Tomokage Yoneyama, Hirofumi Noda, Shotaro Sakuma, Koki Okazaki, Ayami Ishikura, Maho Hanaoka, Shuntaro Ide, Kengo Hattori, Hironori Matsumoto, Hiroshi Tsunemi, Hisamitsu Awaki, Hiroshi Nakajima, Junko S. Hiraga

    Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray   2020.12

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    Publishing type:Research paper (international conference proceedings)   Publisher:SPIE  

    DOI: 10.1117/12.2560772

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  • Experimental studies on the charge transfer inefficiency of CCD developed for the soft X-ray imaging telescope Xtend aboard the XRISM satellite Reviewed

    Yoshiaki Kanemaru, Jin Sato, Toshiyuki Takaki, Yuta Terada, Koji Mori, Mariko Saito, Kumiko K. Nobukawa, Takaaki Tanaka, Hiroyuki Uchida, Kiyoshi Hayashida, Hironori Matsumoto, Hirofumi Noda, Maho Hanaoka, Tomokage Yoneyama, Koki Okazaki, Kazunori Asakura, Shotaro Sakuma, Kengo Hattori, Ayami Ishikura, Yuki Amano, Hiromichi Okon, Takeshi G. Tsuru, Hiroshi Tomida, Hikari Kashimura, Hiroshi Nakajima, Takayoshi Kohmura, Kouichi Hagino, Hiroshi Murakami, Shogo B. Kobayashi, Yusuke Nishioka, Makoto Yamauchi, Isamu Hatsukade, Takashi Sako, Masayoshi Nobukawa, Yukino Urabe, Junko S. Hiraga, Hideki Uchiyama, Kazutaka Yamaoka, Masanobu Ozaki, Tadayasu Dotani, Hiroshi Tsunemi

    Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment   984   164646 - 164646   2020.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.nima.2020.164646

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  • Optical blocking performance of CCDs developed for the X-ray Astronomy Satellite XRISM Reviewed

    Hiroyuki Uchida, Takaaki Tanaka, Yuki Amano, Hiromichi Okon, Takeshi G. Tsuru, Hiroshi Nakajima, Hirofumi Noda, Kiyoshi Hayashida, Hironori Matsumoto, Maho Hanaoka, Tomokage Yoneyama, Koki Okazaki, Kazunori Asakura, Shotaro Sakuma, Kengo Hattori, Ayami Ishikura, Mariko Saito, Kumiko K. Nobukawa, Hiroshi Tomida, Yoshiaki Kanemaru, Jin Sato, Toshiyuki Takaki, Yuta Terada, Koji Mori, Hikari Kashimura, Takayoshi Kohmura, Kouichi Hagino, Hiroshi Murakami, Shogo B. Kobayashi, Yusuke Nishioka, Makoto Yamauchi, Isamu Hatsukade, Takashi Sako, Masayoshi Nobukawa, Yukino Urabe, Junko S. Hiraga, Hideki Uchiyama, Kazutaka Yamaoka, Masanobu Ozaki, Tadayasu Dotani, Hiroshi Tsunemi, Hisanori Suzuki, Shin-ichiro Takagi, Kenichi Sugimoto, Sho Atsumi, Fumiya Tanaka

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   978   2020.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER  

    We have been developing P-channel Charge-Coupled Devices (CCDs) for the upcoming X-ray Astronomy Satellite XRISM, planned to be launched in 2021. While the basic design of the CCD camera (Soft X-ray Imager: SXI) is almost the same as that of the lost Hitomi (ASTRO-H) observatory, we are planning to reduce the phenomenon of "light leakages'' that is one of the largest problems recognized in Hitomi data. We adopted a double-layer optical blocking layer on the XRISM CCDs and also added an extra aluminum layer on the backside of them. We develop a newly designed test sample CCD and irradiate it with optical light to evaluate the optical blocking performance. As a result, light leakages are effectively reduced compared with that of the Hitomi CCDs. We thus conclude that the issue is solved by the new design and that the XRISM CCDs satisfy the mission requirement for the SXI.

    DOI: 10.1016/j.nima.2020.164374

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  • Discovery of a transient X-ray source Suzaku J1305−4930 in NGC 4945

    Shuntaro Ide, Kiyoshi Hayashida, Hirofumi Noda, Hiroyuki Kurubi, Tomokage Yoneyama, Hironori Matsumoto

    Publications of the Astronomical Society of Japan   72 ( 3 )   2020.5

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    Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press (OUP)  

    Abstract

    We report the serendipitous discovery of a transient X-ray source, Suzaku J1305−4930, ∼3 kpc southwest of the nucleus of the Seyfert 2 galaxy NGC 4945. Among the seven Suzaku observations of NGC 4945 from 2005 to 2011, Suzaku J1305−4930 was detected four times in July and August in 2010. The X-ray spectra are better approximated with a multi-color disk model than a power-law model. At the first detection on 2010 July 4–5, its X-ray luminosity was $(8.9^{+0.2}_{-0.4}) \times 10^{38}\:$erg s−1 and the temperature at the inner-disk radius (kTin) was 1.12 ± 0.04 keV. At the last detection with Suzaku on 2010 August 4–5, the luminosity decreased to $(2.2^{+0.3}_{-0.8}) \times 10^{38}\:$erg s−1 and kTin was 0.62 ± 0.07 keV. The source was not detected on 2011 January 29, about six months after the first detection, with a luminosity upper limit of 2.4 × 1038 erg s−1. We also find an absorption feature which is similar to that reported in Cyg X-1. Assuming the standard disk, we suggest that Suzaku J1305−4930 consists of a black hole with a mass of ∼10 $M_\odot$. The relation between the disk luminosity and kTin is not reproduced with the standard model of a constant inner radius but is better approximated with a slim-disk model.

    DOI: 10.1093/pasj/psaa023

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  • Soft X-ray imager (SXI) for Xtend onboard X-Ray imaging and spectroscopy mission (XRISM)

    Hiroshi Nakajima, Kiyoshi Hayashida, Hiroshi Tomida, Koji Mori, Hirofumi Noda, Hironori Matsumoto, Tomokage Yoneyama, Koki Okazaki, Kazunori Asakura, Maho Hanaoka, Kengo Hattori, Ayami Ishikura, Shotaro Sakuma, Takaaki Tanaka, Hiroyuki Uchida, Takeshi Tsuru, Yuki Amano, Hiromichi Okon, Makoto Yamauchi, Isamu Hatsukade, Yusuke Nishioka, Yoshiaki Kanemaru, Jin Sato, Toshiyuki Takaki, Yuta Terada, Tessei Yoshida, Takayoshi Kohmura, Kouichi Hagino, Shogo Kobayashi, Hiroshi Murakami, Hikari Kashimura, Hideki Uchiyama, Kazutaka Yamaoka, Masayoshi Nobukawa, Takashi Sako, Kumiko Nobukawa, Mariko Saito, Junko Hiraga, Yukino Urabe, Masayuki Yoshida, Tadayasu Dotani, Masanobu Ozaki, Hiroshi Tsunemi

    Proceedings of SPIE - The International Society for Optical Engineering   11444   2020

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    Publishing type:Research paper (international conference proceedings)  

    Soft X-ray Imager (SXI) is the X-ray CCD camera onboard X-Ray Imaging and Spectroscopy Mission (XRISM) that is scheduled to be launched in Japanese fiscal year 2022. Combining the SXI with an X-ray mirror assembly, we realize the Soft X-ray Imaging Telescope (Xtend) with a focal length of 5.6 m and a field of view of 38 arcmin square. The high quantum efficiency of the focal-plane sensor, P-channel back-illumination type CCD, brings about the wide effective energy range from 0.4 to 13 keV with moderate energy resolution. Although the design of the SXI for XRISM is basically identical to that for Hitomi satellite, we have applied several improvements to the CCDs in terms of the charge transfer inefficiency (CTI) and the optical blocking performance. For the former issue, we introduce a notch implant in the charge transfer path to reduce the CTI increase in orbit. For the latter, we change the design of aluminum layers on the incident surface of the CCDs to decrease incoming visible light and/or infrared. Four flight model (FM) CCDs have been selected considering several items including energy resolution at 5.9 keV, CTI, dark current, etc. We have also completed calibration campaign for all the FM CCDs. Initial analyses show that the response function for monochromatic X-rays is basically the same as that of Hitomi CCDs. Front-end ASIC have been confirmed to properly function even after the long-term storage after the manufacture for Hitomi SXI. Then the analog electronics for driving CCDs and for processing the output analog signals have been implemented. Their functional tests have been completed with no problem. The focal plane including the single-stage Stirling cooler has been assembled. Production of key parts in SXI sensor body such as contamination blocking filter and onboard calibration source has been finished and they are waiting for assemble. The digitized signals of the CCD are corrected step by step before conversion to X-ray energy. We are preparing calibration database for the correction such as CTI, gain, and line redistribution function.

    DOI: 10.1117/12.2560348

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  • On-ground calibration of XRISM/Xtend CCD

    Tomokage Yoneyama, Hirofumi Noda, Maho Hanaoka, Kiyoshi Hayashida, Koki Okazaki, Kazunori Asakura, Yoshiaki Kanemaru, Jin Sato, Toshiyuki Takaki, Koji Mori, Takashi Sako, Masayoshi Nobukawa, Mariko Saito, Kumiko K. Nobukawa, Hiroshi Murakami, Yuki Amano, Hiroyuki Uchida, Hideki Uchiyama, Hiroshi Tomida, Hiroshi Nakajima, Kengo Hattori, Shotaro Sakuma, Ayami Ishikura, Hironori Matsumoto, Hiromichi Okon, Takaaki Tanaka, Takeshi G. Tsuru, Yukino Urabe, Junko S. Hiraga, Akira Kashimura, Shogo B. Kobayashi, Kouichi Hagino

    Proceedings of SPIE - The International Society for Optical Engineering   11444   2020

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    Publishing type:Research paper (international conference proceedings)  

    X-Ray Imaging and Spectroscopy Mission (XRISM) is the seventh Japanese X-ray astronomical satellite scheduled to be launched in the Japanese fiscal year 2022. XRISM has two mission instruments, “Resolve”, a soft X-ray spectrometer, and “Xtend”, a soft X-ray imager. The Former is an X-ray micro-calorimeter that has ∼ 5 eV of energy resolution with 3′ × 3′ of field of view. The Latter is an X-ray CCD camera with 38′ × 38′ of field of view. Both instruments are placed on the focal plane of X-ray telescopes, X-ray Mirror Assembly (XMA). Xtend CCDs are designed almost the same as those of Hitomi (ASTRO-H), whereas some improvements have been applied. In 2019, flight-model (FM) candidates of Xtend CCDs were fabricated by Hamamatsu Photonics K.K. We performed screening experiments to examine whether they met requirements or not, and then selected the best four chips as the FM. We then performed on-ground calibration on August 2019 and September 2019 for the FM chips to determine the gain correction parameters and to construct the detector response with several energies of monochromatic X-ray. In this paper, we report screening, selection, and on-ground calibration processes, especially focusing on the response verification.

    DOI: 10.1117/12.2561524

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  • X-ray imaging polarimetry with a 2.5-μm pixel CMOS sensor for visible light at room temperature Reviewed

    Kazunori Asakura, Kiyoshi Hayashida, Takashi Hanasaka, Tomoki Kawabata, Tomokage Yoneyama, Koki Okazaki, Shuntaro Ide, Hirofumi Noda, Hironori Matsumoto

    Journal of Astronomical Telescopes, Instruments, and Systems   5 ( 03 )   1 - 1   2019.6

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    Publishing type:Research paper (scientific journal)   Publisher:SPIE-Intl Soc Optical Eng  

    DOI: 10.1117/1.jatis.5.3.035002

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  • Radiation hardness of a p-channel notch CCD developed for the X-ray CCD camera onboard the XRISM satellite Reviewed

    Y. Kanemaru, J. Sato, K. Mori, H. Nakajima, Y. Nishioka, A. Takeda, K. Hayashida, H. Matsumoto, J. Iwagaki, K. Okazaki, K. Asakura, T. Yoneyama, H. Uchida, H. Okon, T. Tanaka, T.G. Tsuru, H. Tomida, T. Shimoi, T. Kohmura, K. Hagino, H. Murakami, S.B. Kobayashi, M. Yamauchi, I. Hatsukade, M. Nobukawa, K.K. Nobukawa, J.S. Hiraga, H. Uchiyama, K. Yamaoka, M. Ozaki, T. Dotani, H. Tsunemi, T. Hamano

    Journal of Instrumentation   14 ( 04 )   C04003 - C04003   2019.4

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    Publishing type:Research paper (scientific journal)   Publisher:IOP Publishing  

    DOI: 10.1088/1748-0221/14/04/c04003

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    Other Link: http://stacks.iop.org/1748-0221/14/i=04/a=C04003?key=crossref.d0932f86868847f290b45b09d3d1d6c8

  • Universal detection of high-temperature emission in X-ray isolated neutron stars Reviewed

    Tomokage Yoneyama, Kiyoshi Hayashida, Hiroshi Nakajima, Hironori Matsumoto

    Publications of the Astronomical Society of Japan   71 ( 1 )   2019.1

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    Authorship:Lead author   Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press (OUP)  

    DOI: 10.1093/pasj/psy135

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  • Unification of strongly magnetized neutron stars with regard to X‐ray emission from hot spots Reviewed

    T. Yoneyama, K. Hayashida, H. Nakajima, H. Matsumoto

    Astronomische Nachrichten   340 ( 1-3 )   221 - 225   2019.1

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    Authorship:Lead author   Publishing type:Research paper (international conference proceedings)   Publisher:Wiley  

    Strongly magnetized isolated neutron stars (NSs) are categorized into two families according, mainly, to their magnetic field strength. The one with a higher magnetic field of 1014–1015 Gauss is called “magnetar,” and the other is the X‐ray isolated neutron star (XINS) with 1013 Gauss. Both magnetars and XINSs show thermal emission in X‐rays, whose spectra are different. The soft X‐ray spectrum (below 10 keV) of a magnetar is reproduced with a two‐temperature blackbody (2BB), whereas that of an XINS shows only a single‐temperature blackbody (1BB), and its temperature is even lower than that of magnetars. On the basis of the magnetic field and temperature, it is often speculated that XINSs may be old and cooled magnetars. However, no other strong observational evidence has yet been reported to support the speculation. Here, we report that all the seven known XINSs show high‐temperature emission, which should have a similar origin to that of magnetars. Analyzing all the XMM‐Newton data of the XINSs with the highest statistics ever achieved, we find that their X‐ray spectra are all reproduced with a 2BB model, similar to magnetars, as opposed to the traditional 1BB model. Their emission radii and temperature ratios are also similar to those of magnetars except for two XINSs, which show significantly smaller radii than the others. The remarkable similarity in the X‐ray spectra between XINSs and magnetars suggests that the origins of their emitting regions are also the same. The lower temperature in XINSs can be explained if XINSs are older than magnetars. Therefore, this result is another observational indication that supports the standard hypothesis of classification of highly magnetized NSs. This article is based on our paper Yoneyama et al. (2019; accepted to PASJ).

    DOI: 10.1002/asna.201913593

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1002/asna.201913593

  • The spectral response of X-ray CCDs in the energy band around Si-K edge: a solution to the Si-K edge problem for the XIS onboard Suzaku

    Koki Okazaki, Kiyoshi Hayashida, Hiroshi Nakajima, Tomokage Yoneyama, Hiroshi Tsunemi, Koji Mori, Masahiro Tsujimoto, Riku Shomura, Ken Ebisawa, Hironori Matsumoto, Yoshitomo Maeda

    High Energy, Optical, and Infrared Detectors for Astronomy VIII   2018.7

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    Publishing type:Research paper (international conference proceedings)   Publisher:SPIE  

    DOI: 10.1117/12.2314259

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  • Sub-arcsecond imaging with multi-image x-ray interferometer module (MIXIM) for very small satellite

    Kiyoshi Hayashida, Tomoki Kawabata, Takashi Hanasaka, Hiroshi Nakajima, Hironori Matsumoto, Hiroshi Tsunemi, Hisamitsu Awaki, Kazunori Asakura, Koki Okazaki, Tomokage Yoneyama, Shuntaro Ide

    Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray   2018.7

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    Publishing type:Research paper (international conference proceedings)   Publisher:SPIE  

    DOI: 10.1117/12.2314181

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  • Soft x-ray imaging telescope (Xtend) onboard X-ray Astronomy Recovery Mission (XARM)

    Kiyoshi Hayashida, Hiroshi Tomida, Makoto Yamauchi, Isamu Hatsukade, Hiroshi Murakami, Takayoshi Kohmura, Kouichi Hagino, Manabu Ishida, Yoshitomo Maeda, Hideki Uchiyama, Kazutaka Yamaoka, Shogo B. Kobayashi, Hironori Matsumoto, Yang Soong, Hideyuki Mori, Takayuki Hayashi, Junichi Iwagaki, Tomokage Yoneyama, Koki Okazaki, Satomi Onishi, Yoshiaki Kanemaru, Jin Sato, Yusuke Nishioka, Ayaki Takeda, Hiromichi Okon, Masayuki Yoshida, kazunori Asakura, Koji Mori, Takashi Okajima, Hiroshi Nakajima, Takeshi G. Tsuru, Takaaki Tanaka, Hiroyuki Uchida, Masayoshi Nobukawa, Kumiko K. Nobukawa, Junko S. Hiraga, Tadayasu Dotani, Masanobu Ozaki, Hiroshi Tsunemi, Takeo Shimoi

    Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray   2018.7

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    Publishing type:Research paper (international conference proceedings)   Publisher:SPIE  

    DOI: 10.1117/12.2311446

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  • Multi-messenger Observations of a Binary Neutron Star Merger Reviewed

    B. P. Abbott, R. Abbott, T. D. Abbott, F. Acernese, K. Ackley, C. Adams, T. Adams, P. Addesso, R. X. Adhikari, V. B. Adya, C. Affeldt, M. Afrough, B. Agarwal, M. Agathos, K. Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith, B. Allen, G. Allen, A. Allocca, P. A. Altin, A. Amato, A. Ananyeva, S. B. Anderson, W. G. Anderson, S. V. Angelova, S. Antier, S. Appert, K. Arai, M. C. Araya, J. S. Areeda, N. Arnaud, K. G. Arun, S. Ascenzi, G. Ashton, M. Ast, S. M. Aston, P. Astone, D. V. Atallah, P. Aufmuth, C. Aulbert, K. AultONeal, C. Austin, A. Avila-Alvarez, S. Babak, P. Bacon, M. K. M. Bader, S. Bae, P. T. Baker, F. Baldaccini, G. Ballardin, S. W. Ballmer, S. Banagiri, J. C. Barayoga, S. E. Barclay, B. C. Barish, D. Barker, K. Barkett, F. Barone, B. Barr, L. Barsotti, M. Barsuglia, D. Barta, S. D. Barthelmy, J. Bartlett, I. Bartos, R. Bassiri, A. Basti, J. C. Batch, M. Bawaj, J. C. Bayley, M. Bazzan, B. Bécsy, C. Beer, M. Bejger, I. Belahcene, A. S. Bell, B. K. Berger, G. Bergmann, J. J. Bero, C. P. L. Berry, D. Bersanetti, A. Bertolini, J. Betzwieser, S. Bhagwat, R. Bhandare, I. A. Bilenko, G. Billingsley, C. R. Billman, J. Birch, R. Birney, O. Birnholtz, S. Biscans, S. Biscoveanu, A. Bisht, M. Bitossi, C. Biwer, M. A. Bizouard, J. K. Blackburn, J. Blackman, C. D. Blair, D. G. Blair, R. M. Blair, S. Bloemen, O. Bock, N. Bode, M. Boer, G. Bogaert, A. Bohe, F. Bondu, E. Bonilla, R. Bonnand, B. A. Boom, R. Bork, V. Boschi, S. Bose, K. Bossie, Y. Bouffanais, A. Bozzi, C. Bradaschia, P. R. Brady, M. Branchesi, J. E. Brau, T. Briant, A. Brillet, M. Brinkmann, V. Brisson, P. Brockill, J. E. Broida, A. F. Brooks, D. A. Brown, D. D. Brown, S. Brunett, C. C. Buchanan, A. Buikema, T. Bulik, H. J. Bulten, A. Buonanno, D. Buskulic, C. Buy, R. L. Byer, M. Cabero, L. Cadonati, G. Cagnoli, C. Cahillane, J. Calderón Bustillo, T. A. Callister, E. Calloni, J. B. Camp, M. Canepa, P. Canizares, K. C. Cannon, H. Cao, J. Cao, C. D. Capano, E. Capocasa, F. Carbognani, S. Caride, M. F. Carney, J. Casanueva Diaz, C. Casentini, S. Caudill, M. Cavaglià, F. Cavalier, R. Cavalieri, G. Cella, C. B. Cepeda, P. Cerdá-Durán, G. Cerretani, E. Cesarini, S. J. Chamberlin, M. Chan, S. Chao, P. Charlton, E. Chase, E. Chassande-Mottin, D. Chatterjee, K. Chatziioannou, B. D. Cheeseboro, H. Y. Chen, X. Chen, Y. Chen, H.-P. Cheng, H. Chia, A. Chincarini, A. Chiummo, T. Chmiel, H. S. Cho, M. Cho, J. H. Chow, N. Christensen, Q. Chu, A. J. K. Chua, S. Chua, A. K. W. Chung, S. Chung, G. Ciani, R. Ciolfi, C. E. Cirelli, A. Cirone, F. Clara, J. A. Clark, P. Clearwater, F. Cleva, C. Cocchieri, E. Coccia, P.-F. Cohadon, D. Cohen, A. Colla, C. G. Collette, L. R. Cominsky, M. Constancio Jr., L. Conti, S. J. Cooper, P. Corban, T. R. Corbitt, I. Cordero-Carrión, K. R. Corley, N. Cornish, A. Corsi, S. Cortese, C. A. Costa, M. W. Coughlin, S. B. Coughlin, J.-P. Coulon, S. T. Countryman, P. Couvares, P. B. Covas, E. E. Cowan, D. M. Coward, M. J. Cowart, D. C. Coyne, R. Coyne, J. D. E. Creighton, T. D. Creighton, J. Cripe, S. G. Crowder, T. J. Cullen, A. Cumming, L. Cunningham, E. Cuoco, T. Dal Canton, G. Dálya, S. L. Danilishin, S. D’Antonio, K. Danzmann, A. Dasgupta, C. F. Da Silva Costa, V. Dattilo, I. Dave, M. Davier, D. Davis, E. J. Daw, B. Day, S. De, D. DeBra, J. Degallaix, M. De Laurentis, S. Deléglise, W. Del Pozzo, N. Demos, T. Denker, T. Dent, R. De Pietri, V. Dergachev, R. De Rosa, R. T. DeRosa, C. De Rossi, R. DeSalvo, O. de Varona, J. Devenson, S. Dhurandhar, M. C. Díaz, L. Di Fiore, M. Di Giovanni, T. Di Girolamo, A. Di Lieto, S. Di Pace, I. Di Palma, F. Di Renzo, Z. Doctor, V. Dolique, F. Donovan, K. L. Dooley, S. Doravari, I. Dorrington, R. Douglas, M. Dovale Álvarez, T. P. Downes, M. Drago, C. Dreissigacker, J. C. Driggers, Z. Du, M. Ducrot, P. Dupej, S. E. Dwyer, T. B. Edo, M. C. Edwards, A. Effler, P. Ehrens, J. Eichholz, S. S. Eikenberry, R. A. Eisenstein, R. C. Essick, D. Estevez, Z. B. Etienne, T. Etzel, M. Evans, T. M. Evans, M. Factourovich, V. Fafone, H. Fair, S. Fairhurst, X. Fan, S. Farinon, B. Farr, W. M. Farr, E. J. Fauchon-Jones, M. Favata, M. Fays, C. Fee, H. Fehrmann, J. Feicht, M. M. Fejer, A. Fernandez-Galiana, I. Ferrante, E. C. Ferreira, F. Ferrini, F. Fidecaro, D. Finstad, I. Fiori, D. Fiorucci, M. Fishbach, R. P. Fisher, M. Fitz-Axen, R. Flaminio, M. Fletcher, H. Fong, J. A. Font, P. W. F. Forsyth, S. S. Forsyth, J.-D. Fournier, S. Frasca, F. Frasconi, Z. Frei, A. Freise, R. Frey, V. Frey, E. M. Fries, P. Fritschel, V. V. Frolov, P. Fulda, M. Fyffe, H. Gabbard, B. U. Gadre, S. M. Gaebel, J. R. Gair, L. Gammaitoni, M. R. Ganija, S. G. Gaonkar, C. Garcia-Quiros, F. Garufi, B. Gateley, S. Gaudio, G. Gaur, V. Gayathri, N. Gehrels, G. Gemme, E. Genin, A. Gennai, D. George, J. George, L. Gergely, V. Germain, S. Ghonge, Abhirup Ghosh, Archisman Ghosh, S. Ghosh, J. A. Giaime, K. D. Giardina, A. Giazotto, K. Gill, L. Glover, E. Goetz, R. Goetz, S. Gomes, B. Goncharov, G. González, J. M. Gonzalez Castro, A. Gopakumar, M. L. Gorodetsky, S. E. Gossan, M. Gosselin, R. Gouaty, A. Grado, C. Graef, M. Granata, A. Grant, S. Gras, C. Gray, G. Greco, A. C. Green, E. M. Gretarsson, B. Griswold, P. Groot, H. Grote, S. Grunewald, P. Gruning, G. M. Guidi, X. Guo, A. Gupta, M. K. Gupta, K. E. Gushwa, E. K. Gustafson, R. Gustafson, O. Halim, B. R. Hall, E. D. Hall, E. Z. Hamilton, G. Hammond, M. Haney, M. M. Hanke, J. Hanks, C. Hanna, M. D. Hannam, O. A. Hannuksela, J. Hanson, T. Hardwick, J. Harms, G. M. Harry, I. W. Harry, M. J. Hart, C.-J. Haster, K. Haughian, J. Healy, A. Heidmann, M. C. Heintze, H. Heitmann, P. Hello, G. Hemming, M. Hendry, I. S. Heng, J. Hennig, A. W. Heptonstall, M. Heurs, S. Hild, T. Hinderer, D. Hoak, D. Hofman, K. Holt, D. E. Holz, P. Hopkins, C. Horst, J. Hough, E. A. Houston, E. J. Howell, A. Hreibi, Y. M. Hu, E. A. Huerta, D. Huet, B. Hughey, S. Husa, S. H. Huttner, T. Huynh-Dinh, N. Indik, R. Inta, G. Intini, H. N. Isa, J.-M. Isac, M. Isi, B. R. Iyer, K. Izumi, T. Jacqmin, K. Jani, P. Jaranowski, S. Jawahar, F. Jiménez-Forteza, W. W. Johnson, D. I. Jones, R. Jones, R. J. G. Jonker, L. Ju, J. Junker, C. V. Kalaghatgi, V. Kalogera, B. Kamai, S. Kandhasamy, G. Kang, J. B. Kanner, S. J. Kapadia, S. Karki, K. S. Karvinen, M. Kasprzack, M. Katolik, E. Katsavounidis, W. Katzman, S. Kaufer, K. Kawabe, F. Kéfélian, D. Keitel, A. J. Kemball, R. Kennedy, C. Kent, J. S. Key, F. Y. Khalili, I. Khan, S. Khan, Z. Khan, E. A. Khazanov, N. Kijbunchoo, Chunglee Kim, J. C. Kim, K. Kim, W. Kim, W. S. Kim, Y.-M. Kim, S. J. Kimbrell, E. J. King, P. J. King, M. Kinley-Hanlon, R. Kirchhoff, J. S. Kissel, L. Kleybolte, S. Klimenko, T. D. Knowles, P. Koch, S. M. Koehlenbeck, S. Koley, V. Kondrashov, A. Kontos, M. Korobko, W. Z. Korth, I. Kowalska, D. B. Kozak, C. Krämer, V. Kringel, B. Krishnan, A. Królak, G. Kuehn, P. Kumar, R. Kumar, S. Kumar, L. Kuo, A. Kutynia, S. Kwang, B. D. Lackey, K. H. Lai, M. Landry, R. N. Lang, J. Lange, B. Lantz, R. K. Lanza, S. L. Larson, A. Lartaux-Vollard, P. D. Lasky, M. Laxen, A. Lazzarini, C. Lazzaro, P. Leaci, S. Leavey, C. H. Lee, H. K. Lee, H. M. Lee, H. W. Lee, K. Lee, J. Lehmann, A. Lenon, M. Leonardi, N. Leroy, N. Letendre, Y. Levin, T. G. F. Li, S. D. Linker, T. B. Littenberg, J. Liu, R. K. L. Lo, N. A. Lockerbie, L. T. London, J. E. Lord, M. Lorenzini, V. Loriette, M. Lormand, G. Losurdo, J. D. Lough, C. O. Lousto, G. Lovelace, H. Lück, D. Lumaca, A. P. Lundgren, R. Lynch, Y. Ma, R. Macas, S. Macfoy, B. Machenschalk, M. MacInnis, D. M. Macleod, I. Magaña Hernandez, F. Magaña-Sandoval, L. Magaña Zertuche, R. M. Magee, E. Majorana, I. Maksimovic, N. Man, V. Mandic, V. Mangano, G. L. Mansell, M. Manske, M. Mantovani, F. Marchesoni, F. Marion, S. Márka, Z. Márka, C. Markakis, A. S. Markosyan, A. Markowitz, E. Maros, A. Marquina, P. Marsh, F. Martelli, L. Martellini, I. W. Martin, R. M. Martin, D. V. Martynov, K. Mason, E. Massera, A. Masserot, T. J. Massinger, M. Masso-Reid, S. Mastrogiovanni, A. Matas, F. Matichard, L. Matone, N. Mavalvala, N. Mazumder, R. McCarthy, D. E. McClelland, S. McCormick, L. McCuller, S. C. McGuire, G. McIntyre, J. McIver, D. J. McManus, L. McNeill, T. McRae, S. T. McWilliams, D. Meacher, G. D. Meadors, M. Mehmet, J. Meidam, E. Mejuto-Villa, A. Melatos, G. Mendell, R. A. Mercer, E. L. Merilh, M. Merzougui, S. Meshkov, C. Messenger, C. Messick, R. Metzdorff, P. M. Meyers, H. Miao, C. Michel, H. Middleton, E. E. Mikhailov, L. Milano, A. L. Miller, B. B. Miller, J. Miller, M. Millhouse, M. C. Milovich-Goff, O. Minazzoli, Y. Minenkov, J. Ming, C. Mishra, S. Mitra, V. P. Mitrofanov, G. Mitselmakher, R. Mittleman, D. Moffa, A. Moggi, K. Mogushi, M. Mohan, S. R. P. Mohapatra, M. Montani, C. J. Moore, D. Moraru, G. Moreno, S. R. Morriss, B. Mours, C. M. Mow-Lowry, G. Mueller, A. W. Muir, Arunava Mukherjee, D. Mukherjee, S. Mukherjee, N. Mukund, A. Mullavey, J. Munch, E. A. Muñiz, M. Muratore, P. G. Murray, K. Napier, I. Nardecchia, L. Naticchioni, R. K. Nayak, J. Neilson, G. Nelemans, T. J. N. Nelson, M. Nery, A. Neunzert, L. Nevin, J. M. Newport, G. Newton, K. K. Y. Ng, P. Nguyen, T. T. Nguyen, D. Nichols, A. B. Nielsen, S. Nissanke, A. Nitz, A. Noack, F. Nocera, D. Nolting, C. North, L. K. Nuttall, J. Oberling, G. D. O’Dea, G. H. Ogin, J. J. Oh, S. H. Oh, F. Ohme, M. A. Okada, M. Oliver, P. Oppermann, Richard J. Oram, B. O’Reilly, R. Ormiston, L. F. Ortega, R. O’Shaughnessy, S. Ossokine, D. J. Ottaway, H. Overmier, B. J. Owen, A. E. Pace, J. Page, M. A. Page, A. Pai, S. A. Pai, J. R. Palamos, O. Palashov, C. Palomba, A. Pal-Singh, Howard Pan, Huang-Wei Pan, B. Pang, P. T. H. Pang, C. Pankow, F. Pannarale, B. C. Pant, F. Paoletti, A. Paoli, M. A. Papa, A. Parida, W. Parker, D. Pascucci, A. Pasqualetti, R. Passaquieti, D. Passuello, M. Patil, B. Patricelli, B. L. Pearlstone, M. Pedraza, R. Pedurand, L. Pekowsky, A. Pele, S. Penn, C. J. Perez, A. Perreca, L. M. Perri, H. P. Pfeiffer, M. Phelps, O. J. Piccinni, M. Pichot, F. Piergiovanni, V. Pierro, G. Pillant, L. Pinard, I. M. Pinto, M. Pirello, M. Pitkin, M. Poe, R. Poggiani, P. Popolizio, E. K. Porter, A. Post, J. Powell, J. Prasad, J. W. W. Pratt, G. Pratten, V. Predoi, T. Prestegard, L. R. Price, M. Prijatelj, M. Principe, S. Privitera, G. A. Prodi, L. G. Prokhorov, O. Puncken, M. Punturo, P. Puppo, M. Pürrer, H. Qi, V. Quetschke, E. A. Quintero, R. Quitzow-James, F. J. Raab, D. S. Rabeling, H. Radkins, P. Raffai, S. Raja, C. Rajan, B. Rajbhandari, M. Rakhmanov, K. E. Ramirez, A. Ramos-Buades, P. Rapagnani, V. Raymond, M. Razzano, J. Read, T. Regimbau, L. Rei, S. Reid, D. H. Reitze, W. Ren, S. D. Reyes, F. Ricci, P. M. Ricker, S. Rieger, K. Riles, M. Rizzo, N. A. Robertson, R. Robie, F. Robinet, A. Rocchi, L. Rolland, J. G. Rollins, V. J. Roma, R. Romano, C. L. Romel, J. H. Romie, D. Rosińska, M. P. Ross, S. Rowan, A. Rüdiger, P. Ruggi, G. Rutins, K. Ryan, S. Sachdev, T. Sadecki, L. Sadeghian, M. Sakellariadou, L. Salconi, M. Saleem, F. 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DuVernois, J. C. Díaz-Vélez, R. W. Ellsworth, K. Engel, O. Enríquez-Rivera, D. W. Fiorino, H. Fleischhack, N. Fraija, J. A. García-González, F. Garfias, M. Gerhardt, A. Gonzõlez Muñoz, M. M. González, J. A. Goodman, Z. Hampel-Arias, J. P. Harding, S. Hernandez, A. Hernandez-Almada, B. Hona, P. Hüntemeyer, A. Iriarte, A. Jardin-Blicq, V. Joshi, S. Kaufmann, D. Kieda, A. Lara, R. J. Lauer, D. Lennarz, H. León Vargas, J. T. Linnemann, A. L. Longinotti, G. Luis Raya, R. Luna-García, R. López-Coto, K. Malone, S. S. Marinelli, O. Martinez, I. Martinez-Castellanos, J. Martínez-Castro, H. Martínez-Huerta, J. A. Matthews, P. Miranda-Romagnoli, E. Moreno, M. Mostafá, L. Nellen, M. Newbold, M. U. Nisa, R. Noriega-Papaqui, R. Pelayo, J. Pretz, E. G. Pérez-Pérez, Z. Ren, C. D. Rho, C. Rivière, D. Rosa-González, M. Rosenberg, E. Ruiz-Velasco, H. Salazar, F. Salesa Greus, A. Sandoval, M. Schneider, H. Schoorlemmer, G. Sinnis, A. J. Smith, R. W. Springer, P. Surajbali, O. Tibolla, K. Tollefson, I. Torres, T. N. Ukwatta, T. Weisgarber, S. Westerhoff, I. G. Wisher, J. Wood, T. Yapici, G. B. Yodh, P. W. Younk, H. Zhou, J. D. Álvarez, A. Aab, P. Abreu, M. Aglietta, I. F. M. Albuquerque, J. M. Albury, I. Allekotte, A. Almela, J. Alvarez Castillo, J. Alvarez-Muñiz, G. A. Anastasi, L. Anchordoqui, B. Andrada, S. Andringa, C. Aramo, N. Arsene, H. Asorey, P. Assis, G. Avila, A. M. Badescu, A. Balaceanu, F. Barbato, R. J. Barreira Luz, K. H. Becker, J. A. Bellido, C. Berat, M. E. Bertaina, X. Bertou, P. L. Biermann, J. Biteau, S. G. Blaess, A. Blanco, J. Blazek, C. Bleve, M. Boháčová, C. Bonifazi, N. Borodai, A. M. Botti, J. Brack, I. Brancus, T. Bretz, A. Bridgeman, F. L. Briechle, P. Buchholz, A. Bueno, S. Buitink, M. Buscemi, K. S. Caballero-Mora, L. Caccianiga, A. Cancio, F. Canfora, R. Caruso, A. Castellina, F. Catalani, G. Cataldi, L. Cazon, A. G. Chavez, J. A. Chinellato, J. Chudoba, R. W. Clay, A. C. Cobos Cerutti, R. Colalillo, A. Coleman, L. Collica, M. R. Coluccia, R. Conceição, G. Consolati, F. Contreras, M. J. Cooper, S. Coutu, C. E. Covault, J. Cronin, S. D'Amico, B. Daniel, S. Dasso, K. Daumiller, B. R. Dawson, J. A. Day, R. M. de Almeida, S. J. de Jong, G. De Mauro, J. R. T. de Mello Neto, I. De Mitri, J. de Oliveira, V. de Souza, J. Debatin, O. Deligny, M. L. Díaz Castro, F. Diogo, C. Dobrigkeit, J. C. D'Olivo, Q. Dorosti, R. C. Dos Anjos, M. T. Dova, A. Dundovic, J. Ebr, R. Engel, M. Erdmann, M. Erfani, C. O. Escobar, J. Espadanal, A. Etchegoyen, H. Falcke, J. Farmer, G. Farrar, A. C. Fauth, N. Fazzini, F. Feldbusch, F. Fenu, B. Fick, J. M. Figueira, A. Filipčič, M. M. Freire, T. Fujii, A. Fuster, R. Gaïor, B. García, F. Gaté, H. Gemmeke, A. Gherghel-Lascu, P. L. Ghia, U. Giaccari, M. Giammarchi, M. Giller, D. Głas, C. Glaser, G. Golup, M. Gómez Berisso, P. F. Gómez Vitale, N. González, A. Gorgi, M. Gottowik, A. F. Grillo, T. D. Grubb, F. Guarino, G. P. Guedes, R. Halliday, M. R. Hampel, P. Hansen, D. Harari, T. A. Harrison, V. M. Harvey, A. Haungs, T. Hebbeker, D. Heck, P. Heimann, A. E. Herve, G. C. Hill, C. Hojvat, E. Holt, P. Homola, J. R. Hörandel, P. Horvath, M. Hrabovský, T. Huege, J. Hulsman, A. Insolia, P. G. Isar, I. Jandt, J. A. Johnsen, M. Josebachuili, J. Jurysek, A. Kääpä, K. H. Kampert, B. Keilhauer, N. Kemmerich, J. Kemp, R. M. Kieckhafer, H. O. Klages, M. Kleifges, J. Kleinfeller, R. Krause, N. Krohm, D. Kuempel, G. Kukec Mezek, N. Kunka, A. Kuotb Awad, B. L. Lago, D. LaHurd, R. G. Lang, M. Lauscher, R. Legumina, M. A. Leigui de Oliveira, A. Letessier-Selvon, I. Lhenry-Yvon, K. Link, D. Lo Presti, L. Lopes, R. López, A. López Casado, R. Lorek, Q. Luce, A. Lucero, M. Malacari, M. Mallamaci, D. Mandat, P. Mantsch, A. G. Mariazzi, I. C. Maris, G. Marsella, D. Martello, H. Martinez, O. Martínez Bravo, J. J. Masías Meza, H. J. Mathes, S. Mathys, J. Matthews, G. Matthiae, E. Mayotte, P. O. Mazur, C. Medina, G. Medina-Tanco, D. Melo, A. Menshikov, K.-D. Merenda, S. Michal, M. I. Micheletti, L. Middendorf, L. Miramonti, B. Mitrica, D. Mockler, S. Mollerach, F. Montanet, C. Morello, G. Morlino, A. L. Müller, G. Müller, M. A. Muller, S. Müller, R. Mussa, I. Naranjo, P. H. Nguyen, M. Niculescu-Oglinzanu, M. Niechciol, L. Niemietz, T. Niggemann, D. Nitz, D. Nosek, V. Novotny, L. Nožka, L. A. Núñez, F. Oikonomou, A. Olinto, M. Palatka, J. Pallotta, P. Papenbreer, G. Parente, A. Parra, T. Paul, M. Pech, F. Pedreira, J. Pȩkala, J. Peña-Rodriguez, L. A. S. Pereira, M. Perlin, L. Perrone, C. Peters, S. Petrera, J. Phuntsok, T. Pierog, M. Pimenta, V. Pirronello, M. Platino, M. Plum, J. Poh, C. Porowski, R. R. Prado, P. Privitera, M. Prouza, E. J. Quel, S. Querchfeld, S. Quinn, R. Ramos-Pollan, J. Rautenberg, D. Ravignani, J. Ridky, F. Riehn, M. Risse, P. Ristori, V. Rizi, W. Rodrigues de Carvalho, G. Rodriguez Fernandez, J. Rodriguez Rojo, M. J. Roncoroni, M. Roth, E. Roulet, A. C. Rovero, P. Ruehl, S. J. Saffi, A. Saftoiu, F. Salamida, H. Salazar, A. Saleh, G. Salina, F. Sánchez, P. Sanchez-Lucas, E. M. Santos, E. Santos, F. Sarazin, R. Sarmento, C. Sarmiento-Cano, R. Sato, M. Schauer, V. Scherini, H. Schieler, M. Schimp, D. Schmidt, O. Scholten, P. Schovánek, F. G. Schröder, S. Schröder, A. Schulz, J. Schumacher, S. J. Sciutto, A. Segreto, A. Shadkam, R. C. Shellard, G. Sigl, G. Silli, R. Šmída, G. R. Snow, P. Sommers, S. Sonntag, J. F. Soriano, R. Squartini, D. Stanca, S. Stanič, J. Stasielak, P. Stassi, M. Stolpovskiy, F. Strafella, A. Streich, F. Suarez, M. Suarez-Durán, T. Sudholz, T. Suomijärvi, A. D. Supanitsky, J. Šupík, J. Swain, Z. Szadkowski, A. Taboada, O. A. Taborda, C. Timmermans, C. J. Todero Peixoto, L. Tomankova, B. Tomé, G. Torralba Elipe, P. Travnicek, M. Trini, M. Tueros, R. Ulrich, M. Unger, M. Urban, J. F. Valdés Galicia, I. Valiño, L. Valore, G. van Aar, P. van Bodegom, A. M. van den Berg, A. van Vliet, E. Varela, B. Vargas Cárdenas, R. A. Vázquez, D. Veberič, C. Ventura, I. D. Vergara Quispe, V. Verzi, J. Vicha, L. Villaseñor, S. Vorobiov, H. Wahlberg, O. Wainberg, D. Walz, A. A. Watson, M. Weber, A. Weindl, M. Wiedeński, L. Wiencke, H. Wilczyński, M. Wirtz, D. Wittkowski, B. Wundheiler, L. Yang, A. Yushkov, E. Zas, D. Zavrtanik, M. Zavrtanik, A. Zepeda, B. Zimmermann, M. Ziolkowski, Z. Zong, F. Zuccarello, S. Kim, S. Schulze, F. E. Bauer, J. M. Corral-Santana, I. de Gregorio-Monsalvo, J. González-López, D. H. Hartmann, C. H. Ishwara-Chandra, S. Martín, A. Mehner, K. Misra, M. J. Michałowski, L. Resmi, Z. Paragi, I. Agudo, T. An, R. Beswick, C. Casadio, S. Frey, P. Jonker, M. Kettenis, B. Marcote, J. Moldon, A. Szomoru, H. J. van Langevelde, J. Yang, A. Cwiek, M. Cwiok, H. Czyrkowski, R. Dabrowski, G. Kasprowicz, L. Mankiewicz, K. Nawrocki, R. Opiela, L. W. Piotrowski, G. Wrochna, M. Zaremba, A. F. Żarnecki, D. Haggard, M. Nynka, J. J. Ruan, P. A. Bland, T. Booler, H. A. R. Devillepoix, J. S. de Gois, P. J. Hancock, R. M. Howie, J. Paxman, E. K. Sansom, M. C. Towner, J. Tonry, M. Coughlin, C. W. Stubbs, L. Denneau, A. Heinze, B. Stalder, H. Weiland, R. P. Eatough, M. Kramer, A. Kraus, E. Troja, L. Piro, J. Becerra González, N. R. Butler, O. D. Fox, H. G. Khandrika, A. Kutyrev, W. H. Lee, R. Ricci, R. E. Ryan Jr., R. Sánchez-Ramírez, S. Veilleux, A. M. Watson, M. H. Wieringa, J. M. Burgess, H. van Eerten, C. J. Fontes, C. L. Fryer, O. Korobkin, R. T. Wollaeger, F. Camilo, A. R. Foley, S. Goedhart, S. Makhathini, N. Oozeer, O. M. Smirnov, R. P. Fender, P. A. Woudt

    The Astrophysical Journal   848 ( 2 )   L12 - L12   2017.10

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    Publishing type:Research paper (scientific journal)   Publisher:American Astronomical Society  

    DOI: 10.3847/2041-8213/aa91c9

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    Other Link: https://iopscience.iop.org/article/10.3847/2041-8213/aa91c9/pdf

  • Discovery of a keV-X-ray excess in RX J1856.5–3754 Reviewed

    Tomokage Yoneyama, Kiyoshi Hayashida, Hiroshi Nakajima, Shota Inoue, Hiroshi Tsunemi

    Publications of the Astronomical Society of Japan   69 ( 3 )   2017.4

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    Authorship:Lead author   Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press (OUP)  

    DOI: 10.1093/pasj/psx025

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  • Hard x-ray imaging polarimeter for PolariS

    Kiyoshi Hayashida, Kim Juyong, Masaaki Sadamoto, Keigo Yoshinaga, Shuichi Gunji, Tatehiro Mihara, Yuji Kishimoto, Hidetoshi Kubo, Tsunefumi Mizuno, Hiromitsu Takahashi, Tadayasu Dotani, Daisuke Yonetoku, Takeshi Nakamori, Tomokage Yoneyama, Yuki Ikeyama, Fumiyoshi Kamitsukasa

    SPIE Proceedings   2016.7

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    Publishing type:Research paper (international conference proceedings)   Publisher:SPIE  

    DOI: 10.1117/12.2232472

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Presentations

  • X線分光撮像衛星 XRISM 搭載軟X線撮像装置 Xtend のためのパイルアップシミュレータの開発

    米山友景

    日本天文学会2023年秋季年会  2023.9 

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    Event date: 2023.9    

    Presentation type:Poster presentation  

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  • X線分光撮像衛星 XRISM 搭載軟X線撮像装置 Xtend による突発天体探査

    米山友景

    日本天文学会2023年秋季年会  2023.9 

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    Event date: 2023.9    

    Presentation type:Oral presentation (general)  

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  • X線分光撮像衛星 XRISM の科学運用準備の現状 (2)

    米山友景

    日本天文学会2023年春季年会  2023.3 

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    Event date: 2023.3    

    Presentation type:Oral presentation (general)  

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  • X-ray spectroscopy of the accretion disk corona source 2S 0921−630

    米山友景

    ブラックホールジェット・降着円盤・円盤風研究会 2023  2023.3 

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    Event date: 2023.3    

    Presentation type:Oral presentation (general)  

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  • Thermal Emission and Magnetic Fields of Isolated Neutron Stars Invited

    Yoneyama Tomokage

    2022.10 

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    Presentation type:Public lecture, seminar, tutorial, course, or other speech  

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  • すざくによる低質量X線連星 2S 0921-630 の降着円盤コロナの解析

    米山友景

    日本天文学会2022年秋季年会  2022.9 

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    Event date: 2022.9    

    Presentation type:Oral presentation (general)  

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  • X 線分光撮像衛星XRISM 搭載軟X 線撮像装置Xtend のためのパイルアップシミュレータの開発

    米山友景

    日本天文学会2022年秋季年会  2022.9 

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    Event date: 2022.9    

    Presentation type:Poster presentation  

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  • Neutral Fe in an Eclipsing Low-Mass X-ray Binary 2S 0921-630

    Tomokage Yoneyama

    44th COSPAR Scientific Assembly 

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    Event date: 2022.7 -  

    Presentation type:Poster presentation  

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  • NICERによる単独中性子星 RX J1856.5−3754 の解析

    米山友景

    日本天文学会2021年春季年会  2021.3 

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  • 単独中性子星の熱的放射と磁場 (博士論文発表)

    米山友景

    第20回高宇連研究会 (高宇連博士論文発表会・研究会)  2021.3 

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  • On-ground calibration of XRISM/Xtend CCD

    Tomokage Yoneyama

    SPIE Astronomical Telescopes + Instrumentation 2020  2020.12 

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  • X線単独中性子星の観測的研究 Invited

    米山友景

    PSR Bi-Monthly Meeting  2020.8 

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    Presentation type:Oral presentation (invited, special)  

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  • Screening and calibration of XRISM/Xtend flight model CCD

    Tomokage Yoneyama

    12th International "Hiroshima" Symposium on the Development and Application of Semiconductor Tracking Detectors 

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    Event date: 2019.12    

    Presentation type:Poster presentation  

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  • Universal Detection of High-temperature Emission in X-ray Isolated Neutron Stars

    Tomokage Yoneyama

    20 Years of Chandra Science Symposium  2019.12 

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  • Calibration for Xtend Flight-Model CCD

    Tomokage Yoneyama

    XRISM Science Meeting (SM2)  2019.10 

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  • Universal Detection of High-temperature Emission in X-ray Isolated Neutron Stars

    Tomokage Yoneyama

    X-ray Astronomy 2019  2019.9 

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    Presentation type:Poster presentation  

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  • Universal detection of high-temperature emission in X-ray Isolated Neutron Stars

    Tomokage Yoneyama

    14th Workshop of International Astronomical Consortium for High Energy Calibration  2019.5 

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  • X線単独中性子星からの高エネルギー成分の発見

    米山友景

    第18回高宇連研究会「高エネルギー宇宙物理学の最前線と2020/30年代のロードマップ」  2019.3 

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    Event date: 2019.3    

    Presentation type:Oral presentation (general)  

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  • Universal detection of high-temperature emission in X-ray Isolated Neutron Stars

    米山友景

    ~中性子星の観測と理論~ 研究活性化ワークショップ 2019  2019.2 

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    Event date: 2019.2    

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  • X線天文衛星代替機(XARM)搭載Xtend 用試作CCD の性能評価(3)

    米山友景

    日本天文学会2018年秋季年会  2018.9 

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    Event date: 2018.9    

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  • Unification of strongly magnetized neutron stars with regard to X-ray emission from hot spots

    Tomokage Yoneyama

    8th International Workshop on Astronomy and Relativistic Astrophysics  2018.9 

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  • 単独中性子星のkeV-excess探査と質量-半径測定

    米山友景

    日本物理学会第73回年次大会  2018.3 

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  • 単独中性子星のkeV-excess探査と質量-半径測定

    米山友景

    日本天文学会2018年春季年会  2018.3 

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  • 単独中性子星XDINSのkeV-X線超過成分の探索とM-R測定の可能性

    米山友景

    ~中性子星の観測と理論~研究活性化ワークショップ 2017  2017.11 

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  • 単独中性子星XDINSのX線スペクトルにおけるkeV-X線超過成分の探索

    米山友景

    日本天文学会2017年秋季年会  2017.9 

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  • XDINSからのkeV-X線超過成分の発見

    米山友景

    X線天体と元素合成を中心とする宇宙核物理研究会  2017.7 

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  • 単独中性子星RX J1856.5-3754 からの keV X線超過成分の発見 (2)

    米山友景

    日本天文学会2017年春季年会  2017.3 

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  • 単独中性子星RXJ1856.5-3754 からのkeV-X 線超過成分の発見

    米山友景

    第16回高宇連研究会「高エネルギー宇宙物理学の課題と 将来展望」 

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    Event date: 2017.3 -  

    Presentation type:Poster presentation  

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  • 単独中性子星RXJ1856.5-3754 からのkeV-X 線超過成分の発見

    米山友景

    第16回宇宙科学シンポジウム 

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    Event date: 2017.1 -  

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  • Discovery of keV excess emission in the isolated neutron star RX J1856.5-3754

    Tomokage Yoneyama

    7 years of MAXI: monitoring X-ray Transients  2016.12 

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    Event date: 2016.12    

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  • 単独中性子星RX J1856.5-3754 からの keV X線超過成分の発見

    米山友景

    日本物理学会2016年秋季年会  2016.9 

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  • 単独中性子星RX J1856.5-3754 からの keV X線超過成分の発見

    米山友景

    日本天文学会2016年秋季年会  2016.9 

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Works

Awards

  • XRISM Outstanding Contribution Award for Young Researchers

    2023.6   XRISM team  

    Tomokage Yoneyama

  • XRISM Outstanding Contribution Award for Students

    2022.10   XRISM team  

    Tomokage Yoneyama

Research Projects

  • Study on magnetized neutron stars with new observational method and instruments

    Grant number:21K20372  2021.8 - 2023.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Research Activity Start-up  Japan Aerospace EXploration Agency

    Tomokage Yoneyama

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    Authorship:Principal investigator 

    Grant amount: \3120000 ( Direct Cost: \2400000 、 Indirect Cost: \720000 )

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  • Determination of M - R relation for X-ray Isolated Neutron Stars with keV - X-ray excess

    Grant number:18J20523  2018.4 - 2021.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for JSPS Fellows  Osaka University

    Tomokage Yoneyama

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    Authorship:Principal investigator 

    Grant amount: \2800000 ( Direct Cost: \2800000 )

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Other

  • X線分光撮像衛星 (XRISM) 搭載軟X線撮像装置命名「Xtend」

    2021.4 -  

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    X線分光撮像衛星 (XRISM) において、ミッション機器である軟X線撮像装置の名称「Xtend」を発案、命名した。

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Teaching Experience

  • Laboratory Practices in Physics

    2023.4 - Now   Institution:Chuo University

  • Experimental Physics 1

    2023.4 - 2023.7   Institution:Chuo University

Academic Activities

  • 日本天文学会 2023年秋季年会 (名古屋大学) 座長

    Role(s): Panel moderator, session chair, etc.

    日本天文学会  2023.9 -  

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  • 14th Workshop of International Astronomical Consortium for High Energy Calibration Local organization comittee

    Role(s): Planning, management, etc.

    International Astronomical Consortium for High Energy Calibration  2019.5    

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  • Peer Review for Publication of the Astronomical Society of Japan

    Role(s): Peer review

    Publication of the Astronomical Society of Japan 

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    Type:Peer review 

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Social Activities

  • 卒業生講話 (X線天文学について)

    Role(s): Lecturer

    兵庫県立西宮高等学校  2023.5 -  

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    Type:Visiting lecture

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  • 卒業生講話 (X線天文学について)

    Role(s): Lecturer

    兵庫県立西宮高等学校  2022.7 -  

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    Type:Visiting lecture

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