Zobrazeno 1 - 10
of 266
pro vyhledávání: '"SHIDATSU, Megumi"'
Autor:
Pike, Sean N., Sugizaki, Mutsumi, Eijnden, Jakob van den, Coughenour, Benjamin, Jaodand, Amruta D., Mihara, Tatehiro, Motta, Sara E., Negoro, Hitoshi, Shaw, Aarran W., Shidatsu, Megumi, Tomsick, John A.
We present MAXI and NuSTAR observations of the Be X-ray binary, MAXI J0655-013, in outburst. NuSTAR observed the source once early in the outburst, when spectral analysis yields a bolometric (0.1--100 keV), unabsorbed source luminosity of $L_{\mathrm
Externí odkaz:
http://arxiv.org/abs/2306.16489
Autor:
Mori, Koji, Tsuru, Takeshi G., Nakazawa, Kazuhiro, Ueda, Yoshihiro, Watanabe, Shin, Tanaka, Takaaki, Ishida, Manabu, Matsumoto, Hironori, Awaki, Hisamitsu, Murakami, Hiroshi, Nobukawa, Masayoshi, Takeda, Ayaki, Fukazawa, Yasushi, Tsunemi, Hiroshi, Takahashi, Tadayuki, Hornschemeier, Ann, Okajima, Takashi, Zhang, William W., Williams, Brian J., Venters, Tonia, Madsen, Kristin, Yukita, Mihoko, Akamatsu, Hiroki, Bamba, Aya, Enoto, Teruaki, Fujita, Yutaka, Furuzawa, Akihiro, Hagino, Kouichi, Ishimura, Kosei, Itoh, Masayuki, Kitayama, Tetsu, Kobayashi, Shogo, Kohmura, Takayoshi, Kubota, Aya, Mizumoto, Misaki, Mizuno, Tsunefumi, Nakajima, Hiroshi, Nobukawa, Kumiko K., Noda, Hirofumi, Odaka, Hirokazu, Ota, Naomi, Sato, Toshiki, Shidatsu, Megumi, Suzuki, Hiromasa, Takahashi, Hiromitsu, Tanimoto, Atsushi, Terada, Yukikatsu, Terashima, Yuichi, Uchida, Hiroyuki, Uchiyama, Yasunobu, Yamaguchi, Hiroya, Yatsu, Yoichi
Publikováno v:
Proc. of SPIE vol. 12181, 1218122 (2022)
In this multi-messenger astronomy era, all the observational probes are improving their sensitivities and overall performance. The Focusing on Relativistic universe and Cosmic Evolution (FORCE) mission, the product of a JAXA/NASA collaboration, will
Externí odkaz:
http://arxiv.org/abs/2303.07577
Discovery of a new supergiant fast X-ray transient MAXI J0709-159 associated with the Be star LY CMa
Autor:
Sugizaki, Mutsumi, Mihara, Tatehiro, Kobayashi, Kohei, Negoro, Hitoshi, Shidatsu, Megumi, Pike, Sean N., Iwakiri, Wataru, Urabe, Sota, Serino, Motoko, Kawai, Nobuyuki, Nakajima, Motoki, Kennea, Jamie A., Liu, Zhu
We report on the discovery of a new supergiant fast X-ray transient (SFXT), MAXI J0709$-$159, and its identification with LY CMa (also known as HD 54786). On 2022 January 25, a new flaring X-ray object named MAXI J0709$-$159, was detected by Monitor
Externí odkaz:
http://arxiv.org/abs/2207.01969
Autor:
Pike, Sean N., Negoro, Hitoshi, Tomsick, John A., Bachetti, Matteo, Brumback, McKinley, Connors, Riley M. T., García, Javier A., Grefenstette, Brian, Hare, Jeremy, Harrison, Fiona A., Jaodand, Amruta, Ludlam, R. M., Mastroserio, Guglielmo, Mihara, Tatehiro, Shidatsu, Megumi, Sugizaki, Mutsumi, Takagi, Ryohei
We present the results of MAXI monitoring and two NuSTAR observations of the recently discovered faint X-ray transient MAXI J1848-015. Analysis of the MAXI light-curve shows that the source underwent a rapid flux increase beginning on 2020 December 2
Externí odkaz:
http://arxiv.org/abs/2202.02883
Autor:
Shidatsu, Megumi, Kobayashi, Kohei, Negoro, Hitoshi, Iwakiri, Wataru, Nakahira, Satoshi, Ueda, Yoshihiro, Mihara, Tatehiro, Enoto, Teruaki, Gendreau, Keith, Arzoumanian, Zaven, Pope, John, Trout, Bruce, Okajima, Takashi, Soong, Yang
We report the results from the broad-band X-ray monitoring of the new Galactic black hole candidate MAXI J1803$-$298 with the MAXI/GSC and Swift/BAT during its outburst. After the discovery on 2021 May 1, the soft X-ray flux below 10 keV rapidly incr
Externí odkaz:
http://arxiv.org/abs/2202.01401
Autor:
Iwakiri, Wataru B., Serino, Motoko, Mihara, Tatehiro, Gu, Liyi, Yamaguchi, Hiroya, Shidatsu, Megumi, Makishima, Kazuo
We discover an unidentified strong emission feature in the X-ray spectrum of EXO 1745$-$248 obtained by RXTE at 40 hr after the peak of a superburst. The structure was centered at 6.6 keV and significantly broadened with a large equivalent width of 4
Externí odkaz:
http://arxiv.org/abs/2108.13568
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:
Kimura, Mariko, Yamada, Shinya, Nakaniwa, Nozomi, Makita, Yoshihiro, Negoro, Hitoshi, Shidatsu, Megumi, Kato, Taichi, Enoto, Teruaki, Isogai, Keisuke, Mihara, Tatehiro, Akazawa, Hidehiko, Gendreau, Keith C., Hambsch, Franz-Josef, Dubovsky, Pavol A., Kudzej, Igor, Kasai, Kiyoshi, Tordai, Tamás, Pavlenko, Elena, Sosnovskij, Aleksei A., Babina, Julia V., Antonyuk, Oksana I., Itoh, Hiroshi, Maehara, Hiroyuki
SS Cyg has long been recognized as the prototype of a group of dwarf novae that show only outbursts. However, this object has entered a quite anomalous event in 2021, which at first appeared to be standstill, i.e., an almost constant luminosity state
Externí odkaz:
http://arxiv.org/abs/2106.15756
Autor:
Terada, Yukikatsu, Holland, Matt, Loewenstein, Michael, Tashiro, Makoto, Takahashi, Hiromitsu, Nobukawa, Masayoshi, Mizuno, Tsunefumi, Tamura, Takayuki, Uno, Shin'ichiro, Watanabe, Shin, Baluta, Chris, Burns, Laura, Ebisawa, Ken, Eguchi, Satoshi, Fukazawa, Yasushi, Hayashi, Katsuhiro, Iizuka, Ryo, Katsuda, Satoru, Kitaguchi, Takao, Kubota, Aya, Miller, Eric, Mukai, Koji, Nakashima, Shinya, Nakazawa, Kazuhiro, Odaka, Hirokazu, Ohno, Masanori, Ota, Naomi, Sato, Rie, Sawada, Makoto, Sugawara, Yasuharu, Shidatsu, Megumi, Tamba, Tsubasa, Tanimoto, Atsushi, Terashima, Yuichi, Tsuboi, Yohko, Uchida, Yuusuke, Uchiyama, Hideki, Yamauchi, Shigeo, Yaqoob, Tahir
Publikováno v:
SPIE JATIS, 7(3), 037001 (2021)
XRISM is an X-ray astronomical mission by the JAXA, NASA, ESA and other international participants, that is planned for launch in 2022 (Japanese fiscal year), to quickly restore high-resolution X-ray spectroscopy of astrophysical objects. To enhance
Externí odkaz:
http://arxiv.org/abs/2106.01611
Autor:
Sasaki, Ryo, Tsuboi, Yohko, Iwakiri, Wataru, Nakahira, Satoshi, Maeda, Yoshitomo, Gendreau, Keith C., Corcoran, Michael F., Hamaguchi, Kenji, Arzoumanian, Zaven, Markwardt, Craig, Enoto, Teruaki, Sato, Tatsuki, Kawai, Hiroki, Mihara, Tatehiro, Shidatsu, Megumi, Negoro, Hitoshi, Serino, Motoko
We report that the RS CVn-type star GT Mus (HR 4492, HD 101379 + HD 101380) was the most active star in the X-ray sky in the last decade in terms of the scale of recurrent energetic flares. We detected 11 flares from GT Mus in 8 yr of observations wi
Externí odkaz:
http://arxiv.org/abs/2103.16822