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arXiv 1706.09398astro-ph.EP
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大型综合巡天望远镜近地天体搜索性能的高保真模拟

High-fidelity Simulations of the Near-Earth Object Search Performance of the Large Synoptic Survey Telescope

Peter Vereš, Steven R. Chesley

摘要:

我们进行高保真模拟的宽视场望远镜调查搜索大于140米的近地天体(NEO),重点是观测和探测模型,探测效率和精度。作为一个测试调查,我们选择了大型综合巡天望远镜。我们将其提出的指向用于10年的任务,并对野外近地天体的检测进行建模。我们讨论了个别模型参数的大小损失,渐晕,褪色,小行星旋转和颜色,填充因子,极限星等,运动速率,场的形状和旋转和调查模式,我们评估的累积完整性的检测人口的大小和时间的函数方面的结果。此外,我们还研究了建模不确定性的来源,并得出基线LSST调查的总体近地天体种群完整性为$55\pm5$ %,其中绝对星等大于22。包括已经发现的物体和正在进行的调查,LSST基线调查结束时的总体完整性应达到$\sim 77\%$。

英文摘要:

We perform high fidelity simulations of a wide-field telescopic survey searching for Near-Earth Objects (NEO) larger than 140\,m, focusing on the observational and detection model, detection efficiency and accuracy. As a test survey we select the Large Synoptic Survey Telescope. We use its proposed pointings for a 10-year mission and model the detection of near-Earth objects in the fields. We discuss individual model parameters for magnitude losses, vignetting, fading, asteroid rotation and colors, fill factor, limiting magnitude, rate of motion, field shape and rotation and survey patterns and we assess results in terms of the cumulative completeness of the detected population as a function of size and time. Additionally, we examine the sources of modeling uncertainty and derive the overall NEO population completeness for the baseline LSST survey to be $55\pm5$% for NEOs with absolute magnitude brighter than 22. Including already discovered objects and ongoing surveys, the population completeness at the end of the LSST baseline survey should reach $\sim 77\%$.

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