Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Yujin E. NAKAGAWA"'
Autor:
Ichiro Takahashi, Kosuke Tsunashima, Takayuki Shiraki, Toru Kojima, Atsumasa Yoshida, Yujin E. Nakagawa
Publikováno v:
Advances in Astronomy, Vol 2010 (2010)
We are developing and operating the automatic telescope Aoyama Gakuin University Robotic Optical Monitor for Astrophysical objects (AROMA) in the Sagamihara Campus of Aoyama Gakuin University. AROMA is composed of two observational equipments, AROMA-
Externí odkaz:
https://doaj.org/article/599acff03d8544c1bb3cd8fdc5da9dbc
Autor:
Yujin E. Nakagawa, Miku Kurimata, Yoshitomo Maeda, Jin Li, Yudai Suwa, Tomoya Kinugawa, Norio Narita, Naoki Ogino, Tatehiro Mihara, Yoichi Yatsu, Kazutaka Yamaoka, Satoshi Sugita, Yuu Niino, Toru Tanimori, Takaaki Tanaka, Teruaki Enoto, Shunsuke Kurosawa, Shigehiro Nagataki, Masaomi Tanaka, Kohji Tsumura, Akihiro Miyasaka, Nobuyuki Kawai, Makoto Yamauchi, Jin Matsumoto, Yoshikatsu Kawata, Keisuke Tamura, Akira Mizuta, Ayumi Yamamoto, T. Sakamoto, Hidehiro Kaneda, Junko S. Hiraga, Hatsune Goto, Kohta Murase, Motoko Serino, Kunihito Ioka, Makoto Arimoto, Hideyuki Izumiura, Masanori Ohno, Akihiko Fukui, Atsumasa Yoshida, Akihiro Doi, Hirotaka Ito, Keitaro Takahashi, Makoto Tashiro, Kenta Kiuchi, Michitoshi Yoshida, Akisato Ohashi, Shuichi Gunji, Kei Sano, Shuji Matsuura, Daito Yuhi, Hirokazu Ikeda, Hiroshi Akitaya, Koji S. Kawabata, Daisuke Yonetoku, Yoshifusa Ita, Hikaru Yamaguchi, Hiroki Nagakura, Yoshikazu Nakada, Takashi Nakamura, Takeru Fujii, Tomonori Totani, Hirofumi Okita, Kensyo Sei, Yusuke Amaya, Tatsuya Sawano, Katsuaki Asano, Kenshi Yanagisawa, Hyeongsoon Wang, Yuji Urata, Ikuyuki Mitsuishi, Tomohiro Yamaguchi, Norita Kawanaka, Jun'ichi Yokoyama, Toshio Murakami, Ryo Yamazaki, Kentaro Motohara, Toru Tamagawa, Takehiko Wada, Susumu Inoue, Shota Kisaka, Kenji Toma, Kohei Inayoshi, Toshio Matsumoto, Takahiro Tanaka, Hirofumi Noda, Hiroshi Tomida
Publikováno v:
Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray.
HiZ-GUNDAM is a future satellite mission which will lead the time-domain astronomy and the multi-messenger astronomy through observations of high-energy transient phenomena. A mission concept of HiZ-GUNDAM was approved by ISAS/JAXA, and it is one of
Autor:
Shunsuke Matsuoka, Ryuuji Kinoshita, Yusuke Nishioka, Yukikatsu Terada, Seiya Yabe, J. Enomoto, Takanori Sakamoto, H. A. Krimm, Makoto Yamauchi, Hiraku Yoshida, Wataru Iwakiri, Kazutaka Yamaoka, Yasushi Fukazawa, Satoshi Sugita, T. Nagayoshi, Kazuo Makishima, N. Ohmori, Masanori Ohno, Motohide Kokubun, Y. Urata, Makoto Tashiro, K. Hurley, Y. Hanabata, T. Kawano, Kazuhiro Nakazawa, A. Y. Lien, Yujin E. Nakagawa, Sawako Takeda, Souhei Nakaya, Tetsuya Yasuda
Publikováno v:
Proceedings of Frontier Research in Astrophysics – III — PoS(FRAPWS2018).
Emission mechanism of the magnetars is still controversial while various observational and theoretical studies have been made. In order to investigate mechanisms of both the persistent X-ray emission and the burst emission of the magnetars, we have p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f8e70b67d36de8820391fff18ef51abf
Autor:
D. Bersier, R. Vanderspek, Yujin E. Nakagawa, James E. Rhoads, Masanori Ohno, H. A. Krimm, A. S. Kozyrev, Daniel A. Perley, William V. Boynton, I. G. Mitrofanov, Antonia Rowlinson, K. Hurley, C. Fellows, J. L. Atteia, A. J. Levan, N. Gehrels, A. B. Sanin, George R. Ricker, A. S. Fruchter, Robert C. Duncan, M. L. Litvak, K. Harshmann, A. Rau, T. Cline, E. Rol, Eric C. Bellm, K. Wiersema, Jj Kavelaars, Nial R. Tanvir, P. T. O'Brien, Kazutaka Yamaoka, Dmitry Golovin, W. Hajdas, D. M. Palmer, David M. Smith, Claudia Wigger, A. von Kienlin
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 403(1), 342-352. Oxford University Press
GRB 051103 is considered to be a candidate soft gamma repeater (SGR) extragalactic giant magnetar flare by virtue of its proximity on the sky to M81/M82, as well as its time history, localization, and energy spectrum. We have derived a refined interp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ddeefd7e0c6696e49d2f5c6c95ec0ca
http://doc.rero.ch/record/303900/files/mnras0403-0342.pdf
http://doc.rero.ch/record/303900/files/mnras0403-0342.pdf
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 427:2824-2840
In January 2009, the 2.1-sec anomalous X-ray pulsar 1E 1547.0-5408 evoked intense burst activity. A follow-up Suzaku observation on January 28 recorded enhanced persistent emission both in soft and hard X-rays (Enoto et al. 2010b). Through re-analysi
Autor:
Megumi Shidatsu, Motoko Serino, Naoki Isobe, Hiroki Kitayama, Mikio Morii, Tetsuya Sootome, Tatehiro Mihara, Masaru Matsuoka, Yujin E. Nakagawa, Shiro Ueno, Yoshihiro Ueda, Masaki Ishikawa, Atsumasa Yoshida, Masashi Kimura, Motoki Nakajima, Takahiro Toizumi, Nobuyuki Kawai, Hiroshi Tomida, Kazuo Hiroi, Mitsuhiro Kohama, Takanori Matsumura, Kyohei Yamazaki, Kousuke Sugimori, Hitoshi Negoro, Fumitoshi Suwa, Kazutaka Yamaoka, Satoshi Nakahira, Takayuki Yamamoto, Yohko Tsuboi, Mutsumi Sugizaki, Ryuichi Usui, Hiroshi Tsunemi
Publikováno v:
PASJ: Publications of the Astronomical Society of Japan. 63(SP3):S803-S811
著者人数: 32名
Accepted: 2011-09-20
資料番号: SA1003145000
Accepted: 2011-09-20
資料番号: SA1003145000
Autor:
Tatehiro Mihara, Mitsuhiro Kohama, Yohko Tsuboi, Motoki Nakajima, Hiroshi Tomida, Kousuke Sugimori, Hitoshi Negoro, Kazuo Hiroi, Fumitoshi Suwa, Nobuyuki Kawai, Ryuichi Usui, Megumi Shidatsu, Yoshihiro Ueda, Takayuki Yamamoto, Satoshi Eguchi, Kyohei Yamazaki, Takanori Matsumura, Arata Daikyuji, Yujin E. Nakagawa, Tetsuya Sootome, Kazutaka Yamaoka, Satoshi Nakahira, Hiroshi Tsunemi, Shiro Ueno, Masashi Kimura, Mikio Morii, Masaki Ishikawa, H. Ozawa, Mutsumi Sugizaki, Akiko Uzawa, Ken Ebisawa, Kazuyoshi Kawasaki, Hiroki Kitayama, Atsumasa Yoshida, Masaru Matsuoka, Naoki Isobe, Motoko Serino
Publikováno v:
PASJ: Publications of the Astronomical Society of Japan. 63(SP3):S821-S825
著者人数: 37名
Accepted: 2011-07-20
資料番号: SA1003146000
Accepted: 2011-07-20
資料番号: SA1003146000
Autor:
Yukikatsu Terada, Poshak Gandhi, Masanori Ohno, Yasushi Fukazawa, Satoshi Sugita, Kazutaka Yamaoka, Makoto Yamauchi, Yujin E. Nakagawa, Yuji Urata, Makoto Tashiro, Wataru Iwakiri, Kenji Toma, Kaori Onda, Takanori Sakamoto, N. Kodaka
Publikováno v:
Publications of the Astronomical Society of Japan. 62:547-556
Time-resolved spectral analyses of GRB 070125 with significant photon detections over the MeV regime using Suzaku/WAM data are reported. The prompt emission interval was divided into 10 time regions, and their spectra were reproduced by a Band functi
Autor:
Masaru Matsuoka, Toru Tamagawa, Rie Sato, T. Q. Donaghy, Alan M. Levine, Donald Q. Lamb, Geoffrey B. Crew, Jean François Olive, M. Boer, Nicolas Vasquez Pazmino, Katsuaki Asano, T. Sakamoto, Yujin E. Nakagawa, Carlo Graziani, A. Pelangeon, J. P. Dezalay, Takashi Shimokawabe, Atsumasa Yoshida, Nat Butler, John P. Doty, Kevin Hurley, George R. Ricker, Makoto Arimoto, R. K. Manchanda, Satoshi Sugita, Motoko Suzuki, Gregory Y. Prigozhin, João Braga, G. Pizzichini, J. Garrett Jernigan, Nobuyuki Kawai, Roland Vanderspek, E. E. Fenimore, Joel Villasenor, Yuji Shirasaki, M. Galassi, Jean-Luc Atteia, S. E. Woosley, Ichiro Takahashi
Publikováno v:
Scopus-Elsevier
Using a pulse-fit method, we investigate the spectral lags between the traditional gamma-ray band (50-400 keV) and the X-ray band (6-25 keV) for 8 GRBs with known redshifts (GRB 010921, GRB 020124, GRB 020127, GRB 021211, GRB 030528, GRB 040924, GRB