Zobrazeno 1 - 10
of 108
pro vyhledávání: '"pickard, Roger D."'
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:
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:
Tampo, Yusuke, Naoto, Kojiguchi, Isogai, Keisuke, Kato, Taichi, Kimura, Mariko, Wakamatsu, Yasuyuki, Nogami, Daisaku, Vanmunster, Tonny, Tordai, Tamás, Akazawa, Hidehiko, Mugas, Felipe, Nishiumi, Taku, Béjar, Víctor J. S., Kawauchi, Kiyoe, Crouzet, Nicolas, Watanabe, Noriharu, Casasayas-Barris, Núria, Terada, Yuka, Fukui, Akihiko, Narita, Norio, Palle, Enric, Tamura, Motohide, Kusakabe, Nobuhiko, Alonso, Roi, Itoh, Hiroshi, Sokolovsky, Kirill, McIntyre, Brandon, Leahy-McGregor, Jesse, Brincat, Stephen M., Dubovsky, Pavol A., Medulka, Tomáš, Kudzej, Igor, Pavlenko, Elena P., Antonyuk, Kirill A., Pit, Nikolaj V., Antonyuk, Oksana I., Babina, Julia V., Baklanov, Aleksei V., Sklyanov, Aleksander S., Zubareva, Alexandra M., Belinski, Aleksandr A., Dodin, Alexandr V., Burlak, Marina A., Ikonnikova, Natalia P., Mishin, Egor O., Potanin, Sergey A., Miller, Ian, Richmond, Michael, Pickard, Roger D., Galdies, Charles, Mizutani, Masanori, Menzies, Kenneth, Stone, Geoffrey, Ruiz, Javier
We report photometric and spectroscopic observations and analysis of the 2019 superoutburst of TCP J21040470+4631129. This object showed a 9-mag superoutburst with early superhumps and ordinary superhumps, which are the features of WZ Sge-type dwarf
Externí odkaz:
http://arxiv.org/abs/2004.10508
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
Autor:
Kato, Taichi, Pavlenko, Elena P., Pit, Nikolaj V., Antonyuk, Kirill A., Antonyuk, Oksana I., Babina, Julia V., Baklanov, Aleksei V., Sosnovskij, Aleksei A., Belan, Sergey P., Maeda, Yutaka, Sugiura, Yuki, Sumiya, Sho, Matsumoto, Hanami, Ito, Daiki, Nikai, Kengo, Kojiguchi, Naoto, Matsumoto, Katsura, Dubovsky, Pavol A., Kudzej, Igor, Medulka, Tomas, Wakamatsu, Yasuyuki, Ohnishi, Ryuhei, Seki, Takaaki, Isogai, Keisuke, Simon, Andrii O., Romanjuk, Yaroslav O., Baransky, Alexsandr R., Sergeev, Aleksandr V., Godunova, Vira G., Izviekova, Inna O., Kozlov, Volodymyr A., Sklyanov, Aleksandr S., Zhuchkov, Roman Ya., Gutaev, Alexei G., Ponomarenko, Vasyl O., Vasylenko, Volodymyr V., Miller, Ian, Kasai, Kiyoshi, Dvorak, Shawn, Menzies, Kenneth, de Miguel, Enrique, Brincat, Stephen M., Pickard, Roger D.
We found that the SU UMa-type dwarf nova NY Ser in the period gap [orbital period 0.097558(6) d] showed standstills twice in 2018. This is the first clear demonstration of a standstill occurring between superoutbursts of an SU UMa-type dwarf nova. Th
Externí odkaz:
http://arxiv.org/abs/1901.05100
Autor:
Kimura, Mariko, Kato, Taichi, Maehara, Hiroyuki, Ishioka, Ryoko, Monard, Berto, Nakajima, Kazuhiro, Stone, Geoff, Pavlenko, Elena P., Antonyuk, Oksana I., Pit, Nikolai V., Sosnovskij, Aleksei A., Katysheva, Natalia, Richmond, Michael, Michel, Raúl, Matsumoto, Katsura, Kojiguchi, Naoto, Sugiura, Yuki, Tei, Shihei, Yamaura, Kenta, Cook, Lewis M., Sabo, Richard, Miller, Ian, Goff, William, Kiyota, Seiichiro, Shugarov, Sergey Yu., Golysheva, Polina, Vozyakova, Olga, Brincat, Stephen M., Itoh, Hiroshi, Tordai, Tamás, Littlefield, Colin, Pickard, Roger D., Tanabe, Kenji, Kinugawa, Kenzo, Honda, Satoshi, Taguchi, Hikaru, Hashimoto, Osamu, Nogami, Daisaku
There are several peculiar long-period dwarf-nova like objects, which show rare, low-amplitude outbursts with highly ionized emission lines. 1SWASP J162117$+$441254, BD Pav, and V364 Lib belong to this kind of objects. Some researchers even doubt whe
Externí odkaz:
http://arxiv.org/abs/1805.06974
Autor:
Imada, Akira, Kato, Taichi, Isogai, Keisuke, Hambsch, Franz-Josef, Dubovsky, Pavol A., Kudzej, Igor, Pickard, Roger D., Akazawa, Hidehiko, Kasai, Kiyoshi, Itoh, Hiroshi, Cook, Lewis M., Kiyota, Seiichiro
We report on time-resolved photometry of the 2015 February-March superoutburst of QZ Virginis. The superoutburst consisted of a separated precursor, main superoutburst, and rebrightening. We detected superhumps with a period of 0.061181(42) d between
Externí odkaz:
http://arxiv.org/abs/1711.06076
Autor:
Wakamatsu, Yasuyuki, Isogai, Keisuke, Kimura, Mariko, Kato, Taichi, Vanmunster, Tonny, Stone, Geoff, Tordai, Tamás, Richmond, Michael, Miller, Ian, Oksanen, Arto, Itoh, Hiroshi, Akazawa, Hidehiko, Kiyota, Seiichiro, de Miguel, Enrique, Pavlenko, Elena P., Antonyuk, Kirill A., Antonyuk, Oksana I., Neustroev, Vitaly V., Sjoberg, George, Dubovsky, Pavol A., Pickard, Roger D., Nogami, Daisaku
We report on our photometric observations of the 2016 superoutburst of ASASSN-16eg. This object showed a WZ Sge-type superoutburst with prominent early superhumps with a period of 0.075478(8) d and a post-superoutburst rebrightening. During the super
Externí odkaz:
http://arxiv.org/abs/1708.09206
Autor:
Kimura, Mariko, Kato, Taichi, Isogai, Keisuke, Tak, Hyungsuk, Shidatsu, Megumi, Itoh, Hiroshi, Tordai, Tamás, Kasai, Kiyoshi, Goff, William, Kiyota, Seiichiro, Pickard, Roger D., Matsumoto, Katsura, Kojiguchi, Naoto, Sugiura, Yuki, Yamada, Eiji, Tatsumi, Taiki, Miyashita, Atsushi, Dubovsky, Pavol A., Kudzej, Igor, de Miguel, Enrique, Stein, William L., Maeda, Yutaka, Pavlenko, Elena P., Sosnovskij, Aleksei A., Babina, Julia V., Cook, Lewis M., Nogami, Daisaku
We present optical multi-colour photometry of V404 Cyg during the outburst from December, 2015 to January, 2016 together with the simultaneous X-ray data. This outburst occurred less than 6 months after the previous outburst in June-July, 2015. These
Externí odkaz:
http://arxiv.org/abs/1706.06779