Zobrazeno 1 - 10
of 190
pro vyhledávání: '"Kiyota, Seiichiro"'
Autor:
Muraoka, Katsuki, Kojiguchi, Naoto, Ito, Junpei, Nogami, Daisaku, Kato, Taichi, Tampo, Yusuke, Taguchi, Kenta, Isogai, Keisuke, Arranz, Teofilo, Blackwell, John, Blane, David, Brincat, Stephen M., Coates, Graeme, Cooney, Walter, Dvorak, Shawn, Galdies, Charles, Glomski, Daniel, Hambsch, Franz-Josef, Harris, Barbara, Hodge, John, Hernández-Verdejo, Jose L., Iozzi, Marco, Itoh, Hiroshi, Kiyota, Seiichiro, Lee, Darrell, Larsson, Magnus, Lahtinen, Tapio, Myers, Gordon, Monard, Berto, Aimar, Mario Morales, Moriyama, Masayuki, Mizutani, Masanori, Nagai, Kazuo, AlQaissieh, Thabet, Gabuya, Aldrin B., Odeh, Mohammad, Perello, Carlos, Pearce, Andrew, Perales, Juan Miguel, Quiles, David, Romanov, Filipp D., Lane, David J., Richmond, Michael, Ruocco, Nello, Sano, Yasuo, Spearman, Mark, Schmidt, Richard, Vanmunster, Tonny, Dubovsky, Pavol A., Wagner, Richard, Wollenhaupt, Guido, Lorenz, Joachim, Lehmann, Gerhard, Salewski, Andrea, Williamson, Guy
We present our optical photometric observations of the 2022 eruption of the recurrent nova U Scorpii (U Sco) using 49,152 data points over 70 d following the optical peak. We have also analyzed its soft X-ray (0.3--1 keV) light curve by the Neil Gehr
Externí odkaz:
http://arxiv.org/abs/2402.06347
Autor:
Kato, Taichi, Itoh, Hiroshi, Vanmunster, Tonny, Kiyota, Seiichiro, Kubodera, Katsuaki, Dubovsky, Pavol A., Kudzej, Igor, Medulka, Tomas, Romanov, Filipp D., Lane, David J.
We analyzed Asteroid Terrestrial-impact Last Alert System (ATLAS), Zwicky Transient Facility (ZTF) and All-Sky Automated Survey for Supernovae (ASAS-SN) data of MASTER OT J055845.55+391533.4 and found that this object repeats superoutburst with a dip
Externí odkaz:
http://arxiv.org/abs/2304.07695
Autor:
Tampo, Yusuke, Kato, Taichi, Kojiguchi, Naoto, Shugarov, Sergey Yu., Itoh, Hiroshi, Matsumoto, Katsura, Nakagawa, Momoka, Nishida, Yukitaka, Richmond, Michael, Shibata, Masaaki, Ito, Junpei, Kokhirova, Gulchehra, Rakhmatullaeva, Firuza, Tordai, Tamás, Kiyota, Seiichiro, Ruiz, Javier, Dubovsky, Pavol A., Medulka, Tomáš, Pavlenko, Elena P., Antonyuk, Oksana I., Sosnovskij, Aleksei A., Baklanov, Aleksei V., Krushevska, Viktoriia, Vanmunster, Tonny, Brincat, Stephen M., Petrik, Karol, Galdies, Charles, Hambsch, Franz-Josef, Maeda, Yutaka, Nogami, Daisaku
Superoutbursts in WZ Sge-type dwarf novae (DNe) are characterized by both early superhumps and ordinary superhumps originating from the 2:1 and 3:1 resonances, respectively. However, some WZ Sge-type DNe show a superoutburst lacking early superhumps;
Externí odkaz:
http://arxiv.org/abs/2303.17960
Autor:
Kato, Taichi, Itoh, Hiroshi, Kiyota, Seiichiro, Vanmunster, Tonny, Tordai, Tamas, Tampo, Yusuke, Kojiguchi, Naoto, Shibata, Masaaki, Ito, Junpei, Pickard, Roger D., Dufoer, Sjoerd
We observed ASASSN-19ax during the long outburst in 2021 September-October. The object has been confirmed to be an SU UMa-type dwarf nova with a superhump period of 0.1000-0.1001 d. This object showed two post-superoutburst rebrightenings both in the
Externí odkaz:
http://arxiv.org/abs/2111.01304
Autor:
Niijima, Keito, Kimura, Mariko, Wakamatsu, Yasuyuki, Kato, Taichi, Nogami, Daisaku, Isogai, Keisuke, Kojiguchi, Naoto, Ohnishi, Ryuhei, Shidatsu, Megumi, Stone, Geoffrey, Hambsch, Franz-Josef, Tordai, Tamás, Richmond, Michael, Vanmunster, Tonny, Myers, Gordon, Brincat, Stephen M., Dubovsky, Pavol A., Medulka, Tomas, Kudzej, Igor, Parimucha, Stefan, Littlefield, Colin, Monard, Berto, Ulowetz, Joseph, Pavlenko, Elena P., Antonyuk, Oksana I., Sosnovskij, Aleksei A., Baklanov, Aleksei V., Antoniuk, Kirill A., Pit, Nikolai V., Belan, Sergei P., Babina, Julia V., Sklyanov, Aleksandr S., Zaostrozhnykh, Anna M., Simon, Andrew V., Cook, Lewis M., Miller, Ian, Itoh, Hiroshi, Licchelli, Domenico, Dvorak, Shawn, Sabo, Richard, Ögmen, Yenal, Starkey, Donn R., Nelson, Peter, de Miguel, Enrique, Galdies, Charles, Menzies, Kenneth, Kiyota, Seiichiro, Oksanen, Arto, Pickard, Roger D., Zubareva, Alexandra M., Wenzel, Klaus, Denisenko, Denis
Publikováno v:
Variable Star Bulletin, 74, 2021
How a black hole accretes matter and how this process is regulated are fundamental but unsolved questions in astrophysics. In transient black-hole binaries, a lot of mass stored in an accretion disk is suddenly drained to the central black hole becau
Externí odkaz:
http://arxiv.org/abs/2107.03681
Autor:
Kato, Taichi, Tampo, Yusuke, Kojiguchi, Naoto, Shibata, Masaaki, Ito, Junpei, Isogai, Keisuke, Itoh, Hiroshi, Hambsch, Franz-Josef, Monard, Berto, Kiyota, Seiichiro, Vanmunster, Tonny, Sosnovskij, Aleksei A., Pavlenko, Elena P., Dubovsky, Pavol A., Kudzej, Igor, Medulka, Tomas
IW And stars are a recently recognized subgroup of dwarf novae which are characterized by (often repetitive) slowly rising standstills terminated by brightening, but the exact mechanism for this variation is not yet identified. We have identified BO
Externí odkaz:
http://arxiv.org/abs/2106.15028
Autor:
Tampo, Yusuke, Isogai, Keisuke, Kojiguchi, Naoto, Maehara, Hiroyuki, Taguchi, Kenta, Kato, Taichi, Kimura, Mariko, Wakamatsu, Yasuyuki, Shibata, Masaaki, Nogami, Daisaku, Kawabata, Miho, Maeda, Keiichi, Namekata, Kosuke, Okamoto, Soshi, Otsuka, Masaaki, Umut, Burgaz, Nagoshi, Shumpei, Itoh, Hiroshi, Vanmunster, Tonny, Tordai, Tamas, Stone, Geoffrey, Matsumoto, Katsura, Fujii, Daiti, Matsumura, Ryota, Nakagawa, Momoka, Takeuchi, Nodoka, Zenkou, Yuki, Pavlenko, Elena P., Antonyuk, Kirill A., Pit, Nikolaj V., Antonyuk, Oksana I., Babina, Julia V., Baklanov, Aleksei V., Sosnovskij, Aleksei A., Shugarov, Sergey Yu., Katysheva, Nataly, Chochol, Drahomir, Dvorak, Shawn, Dubovsky, Pavol A., Medulka, Tomas, Kudzej, Igor, Kiyota, Seiichiro, Zubareva, Alexandra M., Belinski, Alexandr A., Ikonnikova, Natalia P., Burlak, Marina A., Sano, Yasuo, Mizutani, Masanori, Ruiz, Javier, pickard, Roger D., Franz-josef, Hambsch, Dufoer, Sjoerd, Brincat, Stephen M., Galdies, Charles, Menzies, Kenneth, Moriyama, Masayuki, Hiraga, Mitsutaka, Maeda, Yutaka, Hirosawa, Kenji, Funada, Masao, Yamamoto, Minoru
We present spectroscopic and photometric observations of 17 dwarf-nova superoutbursts obtained by KOOLS-IFU mounted on the 3.8 m telescope Seimei at Okayama Observatory of Kyoto University and through VSNET collaboration. Our spectroscopic observatio
Externí odkaz:
http://arxiv.org/abs/2104.04948
Autor:
Kimura, Mariko, Isogai, Keisuke, Kato, Taichi, Kojiguchi, Naoto, Wakamatsu, Yasuyuki, Ohnishi, Ryuhei, Sugiura, Yuki, Matsumoto, Hanami, Sumiya, Sho, Ito, Daiki, Nikai, Kengo, Matsumoto, Katsura, Shugarov, Sergey Yu., Kathysheva, Natalia, Itoh, Hiroshi, Dubovsky, Pavol A., Kudzej, Igor, Akitaya, Hiroshi, Oide, Kohei, Kanai, Takahiro, Ishioka, Chihiro, Oasa, Yumiko, Vanmunster, Tonny, Oksanen, Arto, Tordai, Tamás, Murata, Katsuhiro L., Shiraishi, Kazuki, Adachi, Ryo, Oeda, Motoki, Tachibana, Yutaro, Kiyota, Seiichiro, Pavlenko, Elena P., Antonyuk, Kirill, Antonyuk, Oksana, Pit, Nikolai, Sosnovskij, Aleksei, Babina, Julia, Baklanov, Alex, Kawabata, Koji S., Kawabata, Miho, Nakaoka, Tatsuya, Yamanaka, Masayuki, Kasai, Kiyoshi, Miller, Ian, Brincat, Stephen M., Liu, Wei, Sasada, Mahito, Nogami, Daisaku
We report on the multi-wavelength photometry of the 2018 superoutburst in EG Cnc. We have detected stage A superhumps and long-lasting late-stage superhumps via the optical photometry and have constrained the binary mass ratio and its possible range.
Externí odkaz:
http://arxiv.org/abs/2008.11871
Autor:
Lloyd, Christopher, Cook, Lewis M., Kiyota, Seiichiro, Tan, Hanjie, Hu, Di, Shi, Wei, Zhang, Mi, Zhang, Shenwei, Zhang, Xiaowei, Zhao, Jingyuan, Sun, Guoyou, Gao, Xing, Boyd, David
Publikováno v:
The Observatory 140 (2020) 85-93
M31N 2017-09a is a classical nova and was observed for some 160 days following its initial eruption, during which time it underwent a number of bright secondary outbursts. The light-curve is characterized by continual variation with excursions of at
Externí odkaz:
http://arxiv.org/abs/2006.10118
Autor:
Kato, Taichi, Isogai, Keisuke, Wakamatsu, Yasuyuki, Hambsch, Franz-Josef, Itoh, Hiroshi, Tordai, Tamas, Vanmunster, Tonny, Dubovsky, Pavol A., Kudzej, Igor, Medulka, Tomas, Kimura, Mariko, Ohnishi, Ryuhei, Monard, Berto, Pavlenko, Elena P., Antonyuk, Kirill A., Pit, Nikolaj V., Antonyuk, Oksana I., Babina, Julia V., Baklanov, Aleksei V., Sosnovskij, Aleksei A., Pickard, Roger D., Miller, Ian, Maeda, Yutaka, de Miguel, Enrique, Brincat, Stephen M., Licchelli, Domenico, Cook, Lewis M., Shugarov, Sergey Yu., Zaostrojnykh, Anna M., Chochol, Drahomir, Golysheva, Polina, Katysheva, Natalia, Zubareva, Alexandra M., Stone, Geoff, Kasai, Kiyoshi, Starr, Peter, Littlefield, Colin, Kiyota, Seiichiro, Andreev, Maksim V., Sergeev, Alexandr V., Ruiz, Javier, Myers, Gordon, Simon, Andrii O., Vasylenko, Volodymyr V., Soldan, Francisco, Ogmen, Yenal, Nakajima, Kazuhiro, Nelson, Peter, Masi, Gianluca, Menzies, Kenneth, Sabo, Richard, Bolt, Greg, Dvorak, Shawn, Stanek, Krzysztof Z., Shields, Joseph V., Kochanek, Christopher S., Holoien, Thomas W. -S., Shappee, Benjamin, Prieto, Jose L., Kojima, Tadashi, Nishimura, Hideo, Kaneko, Shizuo, Fujikawa, Shigehisa, Stubbings, Rod, Muyllaert, Eddy, Poyner, Gary, Moriyama, Masayuki, Maehara, Hiroyuki, Schmeer, Patrick, Denisenko, Denis
Continuing the project described by Kato et al. (2009, PASJ, 61, S395, arXiv/0905.1757), we collected times of superhump maxima for 102 SU UMa-type dwarf novae observed mainly during the 2017 season and characterized these objects. WZ Sge-type stars
Externí odkaz:
http://arxiv.org/abs/1911.04645