Zobrazeno 1 - 10
of 917
pro vyhledávání: '"Makishima , Kazuo"'
Utilizing four archival X-ray datasets taken with the Hard X-ray Detector onboard Suzaku, timing studies were performed on three magnetars, 1E 1841-045 (observed in 2006), SGR 0501+4516 (2008), and 1RXS J170849.0-400910 (2009 and 2010). Their pulsati
Externí odkaz:
http://arxiv.org/abs/2407.15409
Four X-ray data sets of the Soft Gamma Repeater SGR 1806-20, taken with the Gas Imaging Spectrometer (GIS) onboad ASCA, were analyzed. Three of them were acquired over 1993 October 9-20, whereas the last one in 1995 October. Epoch-folding analysis of
Externí odkaz:
http://arxiv.org/abs/2404.13799
The present study aims to reinforce the evidence for the ~9 s pulsation in the gamma-ray binary LS 5039, derived with a Suzaku observation in 2007 and that with NuSTAR in 2016 (Yoneda et al 2000). Through a reanalysis of the NuSTAR data incorporating
Externí odkaz:
http://arxiv.org/abs/2311.06473
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$-$248 obtained by RXTE at 40 hr after the peak of a superburst. The structure was centered at 6.6 keV and significantly broadened with a large equivalent width of 4
Externí odkaz:
http://arxiv.org/abs/2108.13568
Autor:
Wada, Yuuki, Matsumoto, Takahiro, Enoto, Teruaki, Nakazawa, Kazuhiro, Yuasa, Takayuki, Furuta, Yoshihiro, Yonetoku, Daisuke, Sawano, Tatsuya, Okada, Go, Nanto, Hidehito, Hisadomi, Shohei, Tsuji, Yuna, Diniz, Gabriel Sousa, Makishima, Kazuo, Tsuchiya, Harufumi
In 2015 the Gamma-Ray Observation of Winter Thunderstorms (GROWTH) collaboration launched a mapping observation campaign for high-energy atmospheric phenomena related to thunderstorms and lightning discharges. This campaign has developed a detection
Externí odkaz:
http://arxiv.org/abs/2108.01829
IGR J00370+6122 is a high-mass X-ray binary, of which the primary is a B1 Ib star, whereas the companion is suggested to be a neutron star by the detection of 346-s pulsation in one-off 4-ks observation. To better understand the nature of the compact
Externí odkaz:
http://arxiv.org/abs/2107.12633
Autor:
Yoneda, Hiroki, Khangulyan, Dmitry, Enoto, Teruaki, Makishima, Kazuo, Mine, Kairi, Mizuno, Tsunefumi, Takahashi, Tadayuki
We report on detailed analysis of the hard X-ray and GeV gamma-ray spectra of LS 5039, one of the brightest gamma-ray binary system in the Galaxy. The NuSTAR observation covering its entire orbit in 2016 allowed us for the first time to study the orb
Externí odkaz:
http://arxiv.org/abs/2106.13412
Publikováno v:
2021MNRAS.tmp..198M
This paper describes an analysis of the NuSTAR data of the fastest-rotating magnetar 1E 1547$-$5408, acquired in 2016 April for a time lapse of 151 ks. The source was detected with a 1-60 keV flux of $1.7 \times 10^{-11}$ ergs s$^{-1}$ cm$^{-2}$, and
Externí odkaz:
http://arxiv.org/abs/2102.00153
Autor:
Hagino, Kouichi, Odaka, Hirokazu, Sato, Goro, Sato, Tamotsu, Suzuki, Hiromasa, Mizuno, Tsunefumi, Kawaharada, Madoka, Ohno, Masanori, Nakazawa, Kazuhiro, Kobayashi, Shogo B., Murakami, Hiroaki, Miyake, Katsuma, Asai, Makoto, Koi, Tatsumi, Madejski, Greg, Saito, Shinya, Wright, Dennis H., Enoto, Teruaki, Fukazawa, Yasushi, Hayashi, Katsuhiro, Kataoka, Jun, Katsuta, Junichiro, Kokubun, Motohide, Laurent, Philippe, Lebrun, Francois, Limousin, Olivier, Maier, Daniel, Makishima, Kazuo, Mori, Kunishiro, Nakamori, Takeshi, Nakano, Toshio, Noda, Hirofumi, Ohta, Masayuki, Sato, Rie, Tajima, Hiroyasu, Takahashi, Hiromitsu, Takahashi, Tadayuki, Takeda, Shin'ichiro, Tanaka, Takaaki, Terada, Yukikatsu, Uchiyama, Hideki, Uchiyama, Yasunobu, Watanabe, Shin, Yamaoka, Kazutaka, Yatsu, Yoichi, Yuasa, Takayuki
Understanding and reducing the in-orbit instrumental backgrounds are essential to achieving high sensitivity in hard X-ray astronomical observations. The observational data of the Hard X-ray Imager (HXI) on board the Hitomi satellite provides useful
Externí odkaz:
http://arxiv.org/abs/2011.10317
Autor:
Yoneda, Hiroki, Makishima, Kazuo, Enoto, Teruaki, Khangulyan, Dmitry, Matsumoto, Takahiro, Takahashi, Tadayuki
To understand the nature of the brightest gamma-ray binary system LS 5039, hard X-ray data of the object, taken with the Suzaku and NuSTAR observatories in 2007 and 2016, respectively, were analyzed. The two data sets jointly gave tentative evidence
Externí odkaz:
http://arxiv.org/abs/2009.02075