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arXiv 1007.0988astro-ph.IM
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AXTAR:任务设计概念

AXTAR: Mission Design Concept

Paul S. Ray, Deepto Chakrabarty, Colleen A. Wilson-Hodge, Bernard F. Phlips, Ronald A. Remillard, Alan M. Levine, Kent S. Wood, Michael T. Wolff, Chul S. Gwon, … 展开作者

Paul S. Ray, Deepto Chakrabarty, Colleen A. Wilson-Hodge, Bernard F. Phlips, Ronald A. Remillard, Alan M. Levine, Kent S. Wood, Michael T. Wolff, Chul S. Gwon, Tod E. Strohmayer, Michael Baysinger, Michael S. Briggs, Peter Capizzo, Leo Fabisinski, Randall C. Hopkins, Linda S. Hornsby, Les Johnson, C. Dauphne Maples, Janie H. Miernik, Dan Thomas, Gianluigi De Geronimo

摘要:

先进X射线定时阵列(AXTAR)是一种用于对紧凑物体进行X射线定时的飞行任务概念,它结合了非常大的收集面积、宽带光谱覆盖、高时间分辨率、高度灵活的调度以及对时间紧迫的机会目标迅速作出反应的能力。它被优化为明亮的银河系X射线源的亚毫秒定时,以研究在中子星表面和黑洞事件视界的自然时间尺度的现象,从而探测超致密物质,强烈弯曲的时空和强烈的磁场的物理。AXTAR的主要仪器,大面积定时阵列(LATA)是一个准直仪器,覆盖范围为2-50 keV,有效面积超过3平方米。LATA由一系列超级模块组成,其中包含2毫米厚的硅像素探测器。与RXTE PCA相比,AXTAR将显著改善有效面积(4 keV时为7倍,30 keV时为36倍)。AXTAR还将携带一个灵敏的天空监测器(SM),除了提供X射线天空的高占空比监测外,它还可以作为X射线瞬变定点观测的触发器。我们审查的科学目标和技术概念AXTAR和目前的初步任务设计研究的结果。

英文摘要:

The Advanced X-ray Timing Array (AXTAR) is a mission concept for X-ray timing of compact objects that combines very large collecting area, broadband spectral coverage, high time resolution, highly flexible scheduling, and an ability to respond promptly to time-critical targets of opportunity. It is optimized for submillisecond timing of bright Galactic X-ray sources in order to study phenomena at the natural time scales of neutron star surfaces and black hole event horizons, thus probing the physics of ultradense matter, strongly curved spacetimes, and intense magnetic fields. AXTAR's main instrument, the Large Area Timing Array (LATA) is a collimated instrument with 2-50 keV coverage and over 3 square meters effective area. The LATA is made up of an array of supermodules that house 2-mm thick silicon pixel detectors. AXTAR will provide a significant improvement in effective area (a factor of 7 at 4 keV and a factor of 36 at 30 keV) over the RXTE PCA. AXTAR will also carry a sensitive Sky Monitor (SM) that acts as a trigger for pointed observations of X-ray transients in addition to providing high duty cycle monitoring of the X-ray sky. We review the science goals and technical concept for AXTAR and present results from a preliminary mission design study.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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