标题： XMM-Newton扫视巡天中的处理挑战 显示英文标题

标题： Processing challenges in the XMM-Newton slew survey

摘要： 镜子的大集光面积与EPIC探测器的高量子效率相结合，使XMM-牛顿成为迄今为止发射过的最灵敏的X射线天文台。 这一点在扫视曝光过程中尤为明显，虽然每次只有15秒的源时间，但实际上构成了一次比当前“全天”目录深十倍的2-10千电子伏特巡天。 这里我们报告了从完整0.2-12千电子伏特能段构建扫视检测目录的进展，并讨论了处理扫视数据所面临的挑战。 快速（每小时90度）的扫视速度导致图像因读出模式的不同而被不同程度地模糊，实际上改变了点扩散函数的形式。 扫视图像中的极低背景改变了最佳源搜索标准，使用全能段搜索单个图像比将数据分割成离散能段更敏感。 由于明亮恒星的光学负载、非常亮源的PSF翼部以及单帧探测器闪光引起的假检测被考虑在内，并概述了识别和从最终目录中去除这些虚假源的技术。 最后，卫星在扫视机动过程中的姿态重建很复杂。 我们讨论了这对目录位置精度的影响。 显示英文摘要

摘要： The great collecting area of the mirrors coupled with the high quantum efficiency of the EPIC detectors have made XMM-Newton the most sensitive X-ray observatory flown to date. This is particularly evident during slew exposures which, while giving only 15 seconds of on-source time, actually constitute a 2-10 keV survey ten times deeper than current "all-sky" catalogues. Here we report on progress towards making a catalogue of slew detections constructed from the full, 0.2-12 keV energy band and discuss the challenges associated with processing the slew data. The fast (90 degrees per hour) slew speed results in images which are smeared, by different amounts depending on the readout mode, effectively changing the form of the point spread function. The extremely low background in slew images changes the optimum source searching criteria such that searching a single image using the full energy band is seen to be more sensitive than splitting the data into discrete energy bands. False detections due to optical loading by bright stars, the wings of the PSF in very bright sources and single-frame detector flashes are considered and techniques for identifying and removing these spurious sources from the final catalogue are outlined. Finally, the attitude reconstruction of the satellite during the slewing manoeuver is complex. We discuss the implications of this on the positional accuracy of the catalogue.