All papers authored by Ryou Ohsawa
Refreshing results…
2023
Jin Beniyama 
,
Ryou Ohsawa ,
Chrysa Avdellidou ,
Shigeyuki Sako ,
Satoshi Takita,
Masateru Ishiguro ,
Tomohiko Sekiguchi ,
Fumihiko Usui ,
Shinichi W. Kinoshita ,
Kianhong Lee ,
Asami Takumi,
Marin Ferrais ,
Emmanuël Jehin
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,
Ryou Ohsawa ,
Chrysa Avdellidou ,
Shigeyuki Sako ,
Satoshi Takita,
Masateru Ishiguro ,
Tomohiko Sekiguchi ,
Fumihiko Usui ,
Shinichi W. Kinoshita ,
Kianhong Lee ,
Asami Takumi,
Marin Ferrais ,
Emmanuël Jehin
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Takayuki Ohgami ,
Josefa Becerra González ,
Nozomu Tominaga ,
Tomoki Morokuma ,
Yousuke Utsumi ,
Yuu Niino ,
Masaomi Tanaka ,
Smaranika Banerjee ,
Frédérick Poidevin ,
Jose Antonio Acosta-Pulido ,
Ismael Perez-Fournon,
Ismael Pérez-Fournon ,
Teo Muñoz Darias,
Teo Muñoz-Darias ,
Hiroshi Akitaya
and 8 other authors
,
Josefa Becerra González ,
Nozomu Tominaga ,
Tomoki Morokuma ,
Yousuke Utsumi ,
Yuu Niino ,
Masaomi Tanaka ,
Smaranika Banerjee ,
Frédérick Poidevin ,
Jose Antonio Acosta-Pulido ,
Ismael Perez-Fournon,
Ismael Pérez-Fournon ,
Teo Muñoz Darias,
Teo Muñoz-Darias ,
Hiroshi Akitaya
and 8 other authors
Follow-up Survey for the Binary Black Hole Merger GW200224_222234 Using Subaru/HSC and GTC/OSIRIS
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Jin Beniyama ,
Tomohiko Sekiguchi ,
Daisuke Kuroda ,
Tomoko Arai ,
Ko Ishibashi,
Masateru Ishiguro ,
Fumi Yoshida ,
Hiroki Senshu,
Takafumi Ootsubo,
Shigeyuki Sako ,
Ryou Ohsawa ,
Satoshi Takita,
Jooyeon Geem ,
Yoonsoo P. Bach
,
Tomohiko Sekiguchi ,
Daisuke Kuroda ,
Tomoko Arai ,
Ko Ishibashi,
Masateru Ishiguro ,
Fumi Yoshida ,
Hiroki Senshu,
Takafumi Ootsubo,
Shigeyuki Sako ,
Ryou Ohsawa ,
Satoshi Takita,
Jooyeon Geem ,
Yoonsoo P. Bach
Simultaneous multicolor photometry of the DESTINY+ target asteroid (3200) Phaethon
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2022
Jin Beniyama ,
Shigeyuki Sako ,
Ryou Ohsawa ,
Satoshi Takita,
Naoto Kobayashi,
Shin-Ichiro Okumura,
Seitaro Urakawa,
Makoto Yoshikawa,
Fumihiko Usui,
Fumi Yoshida,
Mamoru Doi,
Yuu Niino,
Toshikazu Shigeyama,
Masaomi Tanaka ,
Nozomu Tominaga
and 8 other authors
,
Shigeyuki Sako ,
Ryou Ohsawa ,
Satoshi Takita,
Naoto Kobayashi,
Shin-Ichiro Okumura,
Seitaro Urakawa,
Makoto Yoshikawa,
Fumihiko Usui,
Fumi Yoshida,
Mamoru Doi,
Yuu Niino,
Toshikazu Shigeyama,
Masaomi Tanaka ,
Nozomu Tominaga
and 8 other authors
Video observations of tiny near-Earth objects with Tomo-e Gozen
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Yohei Nishino,
Mariko Kimura,
Shigeyuki Sako ,
Jin Beniyama ,
Teruaki Enoto,
Takeo Minezaki,
Nozomi Nakaniwa,
Ryou Ohsawa ,
Satoshi Takita,
Shinya Yamada,
Keith C. Gendreau
,
Jin Beniyama ,
Teruaki Enoto,
Takeo Minezaki,
Nozomi Nakaniwa,
Ryou Ohsawa ,
Satoshi Takita,
Shinya Yamada,
Keith C. Gendreau
Detection of highly correlated optical and X-ray variations in SS Cygni with Tomo-e Gozen and NICER
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2021
Tatsuya Nakaoka,
Keiichi Maeda ,
Masayuki Yamanaka ,
Masaomi Tanaka ,
Miho Kawabata ,
Takashi J. Moriya ,
Koji S. Kawabata ,
Nozomu Tominaga ,
Kengo Takagi,
Fumiya Imazato,
Tomoki Morokuma ,
Shigeyuki Sako,
Ryou Ohsawa ,
Takashi Nagao ,
Ji-An Jiang
and 8 other authors
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,
Masayuki Yamanaka ,
Masaomi Tanaka ,
Miho Kawabata ,
Takashi J. Moriya ,
Koji S. Kawabata ,
Nozomu Tominaga ,
Kengo Takagi,
Fumiya Imazato,
Tomoki Morokuma ,
Shigeyuki Sako,
Ryou Ohsawa ,
Takashi Nagao ,
Ji-An Jiang
and 8 other authors
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Takayuki Ohgami ,
Nozomu Tominaga ,
Yousuke Utsumi ,
Yuu Niino ,
Masaomi Tanaka ,
Smaranika Banerjee ,
Ryo Hamasaki,
Michitoshi Yoshida ,
Tsuyoshi Terai,
Yuhei Takagi ,
Tomoki Morokuma ,
Mahito Sasada ,
Hiroshi Akitaya ,
Naoki Yasuda,
Kenshi Yanagisawa
and 1 other authors
,
Nozomu Tominaga ,
Yousuke Utsumi ,
Yuu Niino ,
Masaomi Tanaka ,
Smaranika Banerjee ,
Ryo Hamasaki,
Michitoshi Yoshida ,
Tsuyoshi Terai,
Yuhei Takagi ,
Tomoki Morokuma ,
Mahito Sasada ,
Hiroshi Akitaya ,
Naoki Yasuda,
Kenshi Yanagisawa
and 1 other authors
Optical follow-up observation for GW event S190510g using Subaru/Hyper Suprime-Cam
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2020
Takafumi Kamizuka ,
Yoshikazu Nakada,
Kenshi Yanagisawa ,
Ryou Ohsawa ,
Yoshifusa Ita,
Hideyuki Izumiura ,
Hiroyuki Mito,
Hiroki Onozato ,
Kentaro Asano ,
Toshiya Ueta ,
Takashi Miyata
,
Yoshikazu Nakada,
Kenshi Yanagisawa ,
Ryou Ohsawa ,
Yoshifusa Ita,
Hideyuki Izumiura ,
Hiroyuki Mito,
Hiroki Onozato ,
Kentaro Asano ,
Toshiya Ueta ,
Takashi Miyata
Long-term Near-infrared Brightening of Nonvariable OH/IR Stars
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2019
Ko Arimatsu ,
Ryou Ohsawa ,
George L. Hashimoto ,
Seitaro Urakawa,
Jun Takahashi,
Miyako Tozuka,
Yoichi Itoh,
Misato Yamashita,
Fumihiko Usui,
Tsutomu Aoki,
Noriaki Arima,
Mamoru Doi,
Makoto Ichiki,
Shiro Ikeda ,
Yoshifusa Ita
and 23 other authors
,
Ryou Ohsawa ,
George L. Hashimoto ,
Seitaro Urakawa,
Jun Takahashi,
Miyako Tozuka,
Yoichi Itoh,
Misato Yamashita,
Fumihiko Usui,
Tsutomu Aoki,
Noriaki Arima,
Mamoru Doi,
Makoto Ichiki,
Shiro Ikeda ,
Yoshifusa Ita
and 23 other authors
New Constraint on the Atmosphere of (50000) Quaoar from a Stellar Occultation
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2018
Ryou Ohsawa ,
Shigeyuki Sako,
Yuki Sarugaku,
Fumihiko Usui ,
Takafumi Ootsubo,
Yasunori Fujiwara,
Mikiya Sato,
Toshihiro Kasuga,
Ko Arimatsu,
Jun-Ichi Watanabe,
Mamoru Doi,
Naoto Kobayashi,
Hidenori Takahashi,
Kentaro Motohara,
Tomoki Morokuma
and 22 other authors
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,
Shigeyuki Sako,
Yuki Sarugaku,
Fumihiko Usui ,
Takafumi Ootsubo,
Yasunori Fujiwara,
Mikiya Sato,
Toshihiro Kasuga,
Ko Arimatsu,
Jun-Ichi Watanabe,
Mamoru Doi,
Naoto Kobayashi,
Hidenori Takahashi,
Kentaro Motohara,
Tomoki Morokuma
and 22 other authors
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