نتایج جستجو برای: kstandard= 0.918
تعداد نتایج: 58 فیلتر نتایج به سال:
We have discovered three certain (SAXJ1324.5−6313, 2S 1711−339 and SAXJ1828.5−1037) and two likely (SAXJ1818.7+1424 and SAXJ2224.9+5421) new thermonuclear X-ray burst sources with the BeppoSAX Wide Field Cameras, and observed a second burst ever from a sixth one (2S 0918−549). Four of them (excluding 2S 1711−339 and 2S 0918−549) are newly detected X-ray sources from which we observed single bur...
2S 0918–549 is a low-mass X-ray binary (LMXB) with a low optical to X-ray flux ratio. Probably it is an ultracompact binary with an orbital period shorter than 60 min. Such binaries cannot harbor hydrogen rich donor stars. As with other (sometimes confirmed) ultracompact LMXBs, 2S 0918–549 is observed to have a high neon-to-oxygen abundance ratio (Juett et al. 2001) which has been used to argue...
We report the discovery of a kilohertz quasi–periodic oscillation (kHz QPO) in the low–mass X–ray binary (LMXB) 2S 0918–549. The kHz QPO has a frequency of 1156±9 Hz, a FWHM of 70±20 Hz, and a fractional rms amplitude of 18%±2%. We also detected for the first time a type I X–ray burst in this source. The compact object must therefore be a neutron star. Finally, we were able to classify the sour...
Supply chain performance is often equated with acquiring the best technology or process. However, current studies suggest that supply chain performance also requires human collaboration. To change conventional thinking, this paper proposes a holistic approach to supply chain management (SCM), clarifies the forces that facilitate human collaboration, and identifies the steps management can take ...
Junji Yokozawa1,2, Ko Nagino1, Yu Sasaki1, Akiko Matsuda1, Yoshiyuki Ueno1 and Sumio Kawata1,3* 1Department of Gastroenterology, Faculty of Medicine, Yamagata University, Yamagata 990-9585, Japan 2Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, Sendai, Japan 3Hyogo Prefectural Nishinomiya Hospital, Nishinomiya 662-0918, Japan *Corresponding author: S...
Comparison of high- and low-state X-ray spectra in the type 1.5 quasi-stellar object 2MASS 0918+2117
When observed by XMM–Newton in 2003, the type 1.5 quasi-stellar object 2MASS 0918+2117 was found to be in a low state, with an X-ray flux approximately four to five times fainter than during an earlier Chandra observation. The 2–6 keV spectrum was unusually hard (photon index ∼ 1.25), with evidence for a reflection-dominated continuum, while a soft excess visible below ∼1 keV prevented confirma...
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