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arXiv 1601.06320astro-ph.IM
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快速瞬变检测差分成像中伪影的鲁棒滤波

Robust Filtering of Artifacts in Difference Imaging for Rapid Transients Detection

Jakub Klencki, Łukasz Wyrzykowski, Zuzanna Kostrzewa-Rutkowska, Andrzej Udalski

摘要:

由于数据量的不断增长,对天气巡天中收集的观测数据进行实时分析和分类是一项巨大的挑战。机器学习技术通常被应用于自动执行此任务。目前,在大多数调查中,瞬态检测的瓶颈是从候选检测中过滤大量伪影的过程。本文提出了一种基于自组织映射(SOM)的分层无监督分类器的自动伪影过滤方法。在OGLE-IV瞬态检测系统上测试时,该系统可接受97%的真实瞬态,并消除97.5%的伪影。伪影过滤的改进允许基于单帧的快速检测OGLE-IV中的瞬态,现在在图像采集后不到15分钟内就可以对瞬态发现发出警报。

英文摘要:

Real-time analysis and classification of observational data collected within synoptic sky surveys is a huge challenge due to constant growth of data volumes. Machine learning techniques are often applied in order to perform this task automatically. The current bottleneck of transients detection in most surveys is the process of filtering numerous artifacts from candidate detection. We present a new method for automated artifact filtering based on hierarchical unsupervised classifier employing Self-Organizing Maps (SOMs). The system accepts 97 % of real transients and removes 97.5 % of artifacts when tested on the OGLE-IV Transient Detection System. The improvement of the artifacts filtering allowed for single-frame based rapid detections of transients within OGLE-IV, which now alerts on transient discoveries in less than 15 minutes from the image acquisition.

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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