Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Takagi Kengo"'
Autor:
Arimoto, Makoto, Asano, Katsuaki, Kawabata, Koji S., Toma, Kenji, Gill, Ramandeep, Granot, Jonathan, Ohno, Masanori, Takahashi, Shuta, Ogino, Naoki, Goto, Hatsune, Nakamura, Kengo, Nakaoka, Tatsuya, Takagi, Kengo, Kawabata, Miho, Yamanaka, Masayuki, Sasada, Mahito, Razzaque, Soebur
Gamma-ray bursts (GRBs) are the most electromagnetically luminous cosmic explosions. They are powered by collimated streams of plasma (jets) ejected by a newborn stellar-mass black hole or neutron star at relativistic velocities (near the speed of li
Externí odkaz:
http://arxiv.org/abs/2310.04144
Autor:
Kawabata, Miho, Maeda, Keiichi, Yamanaka, Masayuki, Nakaoka, Tatsuya, Kawabata, Koji S., Aoki, Kentaro, Anupama, G. C., Burgaz, Umut, Dutta, Anirban, Isogai, Keisuke, Kino, Masaru, Kojiguchi, Naoto, Kota, Iida, Kumar, Brajesh, Kuroda, Daisuke, Maehara, Hiroyuki, Matsubayashi, Kazuya, Morihana, Kumiko, Murata, Katsuhiro L., Ohshima, Tomohito, Otsuka, Masaaki, Sahu, Devendra K., Singh, Avinash, Sugitani, Koji, Takahashi, Jun, Takagi, Kengo
We present comprehensive spectroscopic and photometric analyses of the intermediate luminosity Type Iax supernova (SN Iax) 2019muj based on multi-band datasets observed through the framework of the OISTER target-of-opportunity program. SN 2019muj exh
Externí odkaz:
http://arxiv.org/abs/2107.02822
Autor:
Sasada, Mahito, Utsumi, Yousuke, Itoh, Ryosuke, Tominaga, Nozomu, Tanaka, Masaomi, Morokuma, Tomoki, Yanagisawa, Kenshi, Kawabata, Koji S., Ohgami, Takayuki, Yoshida, Michitoshi, Abe, Fumio, Adachi, Ryo, Akitaya, Hiroshi, Chong, Yang, Daikuhara, Kazuki, Hamasaki, Ryo, Honda, Satoshi, Hosokawa, Ryohei, Iida, Kota, Imazato, Fumiya, Ishioka, Chihiro, Iwasaki, Takumi, Jian, Mingjie, Kamei, Yuhei, Kanai, Takahiro, Kaneda, Hidehiro, Kaneko, Ayane, Katoh, Noriyuki, Kawai, Nobuyuki, Kubota, Keiichiro, Kubota, Yuma, Mamiya, Hideo, Matsubayashi, Kazuya, Morihana, Kumiko, Murata, Katsuhiro L., Nagayama, Takahiro, Nakamura, Noriatsu, Nakaoka, Tatsuya, Niino, Yuu, Nishinaka, Yuki, Niwano, Masafumi, Nogami, Daisaku, Oasa, Yumiko, Oeda, Miki, Ogawa, Futa, Ohsawa, Ryou, Ohta, Kouji, Oide, Kohei, Onozato, Hiroki, Sako, Shigeyuki, Saito, Tomoki, Sekiguchi, Yuichiro, Shigeyama, Toshikazu, Shigeyoshi, Takumi, Shikauchi, Minori, Shiraishi, Kazuki, Suzuki, Daisuke, Takagi, Kengo, Takahashi, Jun, Takarada, Takuya, Takayama, Masaki, Takeuchi, Himeka, Tamura, Yasuki, Tanaka, Ryoya, Toma, Sayaka, Tozuka, Miyako, Uchida, Nagomi, Uzawa, Yoshinori, Yamanaka, Masayuki, Yasuda, Moeno, Yatsu, Yoichi
The Laser Interferometer Gravitational-wave Observatory Scientific Collaboration and Virgo Collaboration (LVC) sent out 56 gravitational-wave (GW) notices during the third observing run (O3). Japanese collaboration for Gravitational wave ElectroMagne
Externí odkaz:
http://arxiv.org/abs/2106.04842
Autor:
Wakamatsu, Yasuyuki, Thorstensen, John R., Kojiguchi, Naoto, Isogai, Keisuke, Kimura, Mariko, Ohnishi, Ryuhei, Kato, Taichi, Itoh, Hiroshi, Sugiura, Yuki, Sumiya, Sho, Matsumoto, Hanami, Ito, Daiki, Nikai, Kengo, Akitaya, Hiroshi, Ishioka, Chihiro, Oide, Kohei, Kanai, Takahiro, Uzawa, Yoshinori, Oasa, Yumiko, Tordai, Tamás, Vanmunster, Tonny, Shugarov, Sergey Yu., Yamanaka, Masayuki, Sasada, Mahito, Takagi, Kengo, Nishinaka, Yuki, Yamazaki, Yuina, Otsubo, Ikki, Nakaoka, Tatsuya, Murata, Katsuhiro L., Ohsawa, Ryou, Morita, Masahiro, Ichiki, Makoto, Dufoer, Sjoerd, Mizutani, Masanori, Horiuchi, Takashi, Tozuka, Miyako, Takayama, Masaki, Ohshima, Tomohito, Saito, Tomoki, Dubovsky, Pavol A., Stone, Geoff, Miller, Ian, Nogami, Daisaku
We report photometric and spectroscopic observations of the eclipsing SU UMa-type dwarf nova ASASSN-18aan. We observed the 2018 superoutburst with 2.3 mag brightening and found the orbital period ($P_{\rm orb}$) to be 0.149454(3) d, or 3.59 hr. This
Externí odkaz:
http://arxiv.org/abs/2102.04104
Autor:
Morokuma, Tomoki, Utsumi, Yousuke, Ohta, Kouji, Yamanaka, Masayuki, Kawabata, Koji S., Inoue, Yoshiyuki, Tanaka, Masaomi, Yoshida, Michitoshi, Itoh, Ryosuke, Sasada, Mahito, Tominaga, Nozomu, Mori, Hiroki, Kawabata, Miho, Nakaoka, Tatsuya, Chogi, Maiko, Abe, Taisei, Huang, Ruochen, Kawahara, Naoki, Kimura, Hiroki, Nagashima, Hiroki, Takagi, Kengo, Yamazaki, Yuina, Liu, Wei, Ohsawa, Ryou, Sako, Shigeyuki, Murata, Katsuhiro L., Morihana, Kumiko, Gilligan, Christina K., Isogai, Keisuke, Kimura, Mariko, Wakamatsu, Yasuyuki, Ohnishi, Ryuhei, Takayama, Masaki, Honda, Satoshi, Matsuoka, Yoshiki, Yamashita, Takuji, Nagataki, Shigehiro, Tanaka, Yasuyuki T.
We present our follow-up observations to search for an electromagnetic counterpart of the IceCube high-energy neutrino, IceCube-170922A. Monitoring observations of a likely counterpart, TXS 0506+056, are also described. First, we quickly took optical
Externí odkaz:
http://arxiv.org/abs/2011.04957
Autor:
Maehara, Hiroyuki, Notsu, Yuta, Namekata, Kousuke, Honda, Satoshi, Kowalski, Adam F., Katoh, Noriyuki, Ohshima, Tomohito, Iida, Kota, Oeda, Motoki, Murata, Katsuhiro L., Yamanaka, Masayuki, Takagi, Kengo, Sasada, Mahito, Akitaya, Hiroshi, Ikuta, Kai, Okamoto, Soshi, Nogami, Daisaku, Shibata, Kazunari
In this paper, we present the results from spectroscopic and photometric observations of the M-type flare star YZ CMi in the framework of the Optical and Infrared Synergetic Telescopes for Education and Research (OISTER) collaborations during the Tra
Externí odkaz:
http://arxiv.org/abs/2009.14412
Autor:
Nakaoka, Tatsuya, Maeda, Keiichi, Yamanaka, Masayuki, Tanaka, Masaomi, Kawabata, Miho, Moriya, Takashi J., Kawabata, Koji S., Tominaga, Nozomu, Takagi, Kengo, Imazato, Fumiya, Morokuma, Tomoki, Sako, Shigeyuki, Ohsawa, Ryou, Nagao, Takashi, Jiang, Ji-an, Burgaz, Umut, Taguchi, Kenta, Uemura, Makoto, Akitaya, Hiroshi, Sasada, Mahito, Isogai, Keisuke, Otsuka, Masaaki, Maehara, Hiroyuki
We present optical and near-infrared observations of SN~Ib~2019ehk. We show that it evolved to a Ca-rich transient according to its spectral properties and evolution in late phases. It, however, shows a few distinguishable properties from the canonic
Externí odkaz:
http://arxiv.org/abs/2005.02992
Autor:
Tanimoto, Yuta, Yamashita, Takuya, Ui, Takahiro, Uchiyama, Mizuho, Kawabata, Miho, Mori, Hiroki, Nakaoka, Tatsuya, Abe, Taisei, Itoh, Ryosuke, Kanda, Yuka, Kawaguchi, Kenji, Kawahara, Naoki, Otsubo, Ikki, Shiki, Kensei, Takagi, Kengo, Takaki, Katsutoshi, Akitaya, Hiroshi, Yamanaka, Masayuki, Kawabata, Koji S.
PTFO 8-8695b (CVSO 30b) is a young planet candidate whose host star is a $\sim$ 2.6 Myr-old T-Tauri star, and there have been continuous discussions about the nature of this system. To unveil the mystery of this system, we observed PTFO8-8695 for aro
Externí odkaz:
http://arxiv.org/abs/2001.00148
Autor:
Singh, Avinash, Sahu, D. K., Anupama, G. C., Kumar, Brajesh, Kumar, Harsh, Yamanaka, Masayuki, Baklanov, Petr V., Tominaga, Nozomu, Blinnikov, Sergei I., Maeda, Keiichi, Dutta, Anirban, Bhalerao, Varun, Anche, Ramya M., Barway, Sudhanshu, Akitaya, Hiroshi, Nakaoka, Tatsuya, Kawabata, Miho, Kawabata, Koji S, Sasada, Mahito, Takagi, Kengo, Maehara, Hiroyuki, Isogai, Keisuke, Kino, Masaru, Taguchi, Kenta, Nagao, Takashi
High cadence ultraviolet, optical and near-infrared photometric and low-resolution spectroscopic observations of the peculiar Type II supernova (SN) 2018hna are presented. The early phase multiband light curves exhibit the adiabatic cooling envelope
Externí odkaz:
http://arxiv.org/abs/1908.07807
Autor:
Kawabata, Miho, Maeda, Keiichi, Yamanaka, Masayuki, Nakaoka, Tatsuya, Kawabata, Koji, Adachi, Ryo, Akitaya, Hiroshi, Burgaz, Umut, Hanayama, Hidekazu, Horiuchi, Takashi, Hosokawa, Ryohei, Iida, Kota, Imazato, Fumiya, Isogai, Keisuke, Jiang, Ji-an, Katoh, Noriyuki, Kimura, Hiroki, Kino, Masaru, Kuroda, Daisuke, Maehara, Hiroyuki, Matsubayashi, Kazuya, Morihana, Kumiko, Murata, Katsuhiro, Nagao, Takashi, Niwano, Masafumi, Nogami, Daisaku, Oeda, Motoki, Ono, Tatsuharu, Onozato, Hiroki, Otsuka, Masaaki, Saito, Tomoki, Sasada, Mahito, Shiraishi, Kazuki, Sugiyama, Haruki, Taguchi, Kenta, Takahashi, Jun, Takagi, Kengo, Takagi, Seiko, Takayama, Masaki, Tozuka, Miyako, Sekiguchi, Kazuhiro
We present optical observations of type Ia supernova (SN) 2019ein, starting at 2 days after the estimated explosion date. The spectra and the light curves show that SN 2019ein belongs to the High-Velocity (HV) and Bload Line groups with relatively ra
Externí odkaz:
http://arxiv.org/abs/1908.03001