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arXiv 1408.6537astro-ph.IM
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LOFT任务的数字数据处理概念

The digital data processing concepts of the LOFT mission

C. Tenzer, A. Argan, A. Cros, Y. Favre, M. Gschwender, F. Jetter, A. Santangelo, S. Schanne, P. Smith, S. Suchy, P. Uter, D. Walton, H. Wende

摘要:

大型X射线计时天文台(LOFT)是欧空局考虑用于M3任务的五个候选任务之一(发射机会在2022 - 2024年)。LOFT有两种仪器:大面积探测器(LAD)和宽视场监视器(WFM)。LAD是一种10 m 2级仪器,其收集面积约为迄今为止最大定时任务(RXTE)的15倍,首次结合CCD级光谱分辨率。WFM将持续监测天空并识别源状态的变化,检测瞬态和突发现象,并允许任务对此做出响应。使用LAD的有效面积观测最亮的X射线源会导致巨大的数据速率,这些数据速率需要在多个级别上进行处理,并在船上实时进行过滤和压缩。另一方面,WFM数据处理对数据速率的约束相当低,但需要算法来找到探测器上的光子相互作用位置,然后对探测器图像进行去卷积,以获得观测到的瞬态源的天空坐标。在下文中,我们将概述在研究阶段开发的数据处理概念。

英文摘要:

The Large Observatory for X-ray Timing (LOFT) is one of the five mission candidates that were considered by ESA for an M3 mission (with a launch opportunity in 2022 - 2024). LOFT features two instruments: the Large Area Detector (LAD) and the Wide Field Monitor (WFM). The LAD is a 10 m 2 -class instrument with approximately 15 times the collecting area of the largest timing mission so far (RXTE) for the first time combined with CCD-class spectral resolution. The WFM will continuously monitor the sky and recognise changes in source states, detect transient and bursting phenomena and will allow the mission to respond to this. Observing the brightest X-ray sources with the effective area of the LAD leads to enormous data rates that need to be processed on several levels, filtered and compressed in real-time already on board. The WFM data processing on the other hand puts rather low constraints on the data rate but requires algorithms to find the photon interaction location on the detector and then to deconvolve the detector image in order to obtain the sky coordinates of observed transient sources. In the following, we want to give an overview of the data handling concepts that were developed during the study phase.

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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