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	An underlying clock in the extreme flip-flop state transitions of the black hole transient Swift J1658.2-4242 期刊论文 OAI收割 Astronomy and Astrophysics, 2020, 卷号: 641, 页码: A101 作者: HXMT \| 收藏 \| 浏览/下载：61/0 \| 提交时间：2022/02/08 accretion accretion disks black hole physics X-rays: binaries time Astrophysics - High Energy Astrophysical Phenomena Abstract: Aims: Flip-flops are top-hat-like X-ray flux variations, which have been observed in some transient accreting black hole binary systems, and feature simultaneous changes in the spectral hardness and the power density spectrum (PDS). They occur at a crucial time in the evolution of these systems, when the accretion disc emission starts to dominate over coronal emission. Flip-flops remain a poorly understood phenomenon, so we aim to thoroughly investigate them in a system featuring several such transitions. Methods: Within the multitude of observations of Swift J1658.2-4242 during its outburst in early 2018, we detected 15 flip-flops, enabling a detailed analysis of their individual properties and the differences between them. We present observations by XMM-Newton, NuSTAR, Astrosat, Swift, Insight-HXMT, INTEGRAL, and ATCA. We analysed their light curves, searched for periodicities, computed their PDSs, and fitted their X-ray spectra, to investigate the source behaviour during flip-flop transitions and how the interval featuring flip-flops differs from the rest of the outburst. Results: The flip-flops of Swift J1658.2-4242 are of an extreme variety, exhibiting flux differences of up to 77% within 100 s, which is much larger than what has been seen previously. We observed radical changes in the PDS simultaneous with the sharp flux variations, featuring transitions between the quasi-periodic oscillation types C and A, which have never been observed before. Changes in the PDS are delayed, but more rapid than changes in the light curve. Flip-flops occur in two intervals within the outburst, separated by about two weeks in which these phenomena were not seen. Transitions between the two flip-flop states occurred at random integer multiples of a fundamental period of 2.761 ks in the first interval and 2.61 ks in the second. Spectral analysis reveals the high and low flux flip-flop states to be very similar, but distinct from intervals lacking flip-flops. A change of the inner temperature of the accretion disc is responsible for most of the flux difference in the flip-flops. We also highlight the importance of correcting for the influence of the dust scattering halo on the X-ray spectra.
	基于HPI的通用ATCA EPICS设备支持模块开发期刊论文 OAI收割原子能科学技术, 2016, 卷号: v.50, 期号: 4, 页码: 745-750 作者: 尹聪聪; 张宁; 汪全全; 雷蕾; 李勇平收藏 \| 浏览/下载：24/0 \| 提交时间：2016/12/21 HPI EPICS ATCA系统钍基熔盐堆可靠性
	高性能计算节点智能平台管理模块的设计期刊论文 OAI收割核电子学与探测技术, 2011, 期号: 5, 页码: 495-498+517 作者: 王强; 刘振安; 徐昊; 金大鹏; 李陆收藏 \| 浏览/下载：30/0 \| 提交时间：2015/12/21 ATCA 高性能计算节点智能平台管理
	基于ATCA平台的EPICS/IOC冗余技术研究期刊论文 OAI收割核电子学与探测技术, 2010, 期号: 7, 页码: 879-884 作者: 李刚（加）; 赵籍九; 雷革; 赵卓; 徐广磊收藏 \| 浏览/下载：50/0 \| 提交时间：2015/12/14 EPICS ATCA Xen Linux-HA
	开放式体系结构的数字信号处理平台研制学位论文 OAI收割博士, 声学研究所: 中国科学院声学研究所, 2009 岑凡收藏 \| 浏览/下载：18/0 \| 提交时间：2011/05/07 数字信号处理 ATCA 性能分析
	ATCA之机箱管理及高可靠性设计与实现期刊论文 OAI收割微计算机信息, 2007, 卷号: 23, 期号: 5, 页码: 42-43，173 作者: 谢勇祥; 曲道奎 \| 收藏 \| 浏览/下载：27/0 \| 提交时间：2010/11/29 Atca Ipmi 机箱管理