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- Title
Machine-learning-based real-bogus system for the HSC-SSP moving object detection pipeline.
- Authors
Hsing-Wen LIN; Ying-Tung CHEN; Jen-Hung WANG; Shiang-Yu WANG; Fumi YOSHIDA; Wing-Huen IP; Satoshi MIYAZAKI; Tsuyoshi TERAI
- Abstract
Machine-learning techniques are widely applied inmanymodern optical sky surveys, e.g., Pan-STARRS1, PTF/iPTF, and the Subaru/Hyper Suprime-Cam survey, to reduce human intervention in data verification. In this study, we have established a machine-learningbased real-bogus system to reject false detections in the Subaru/Hyper-Suprime-Cam Strategic Survey Program (HSC-SSP) source catalog. Therefore, the HSC-SSP moving object detection pipeline can operate more effectively due to the reduction of false positives. To train the real-bogus system, we use stationary sources as the real training set and "flagged" data as the bogus set. The training set contains 47 features, most of which are photometric measurements and shape moments generated from the HSC image reduction pipeline (hscPipe). Our system can reach a true positive rate (tpr) ~96% with a false positive rate (fpr) ~1% or tpr ~99% at fpr ~5%. Therefore, we conclude that stationary sources are decent real training samples, and using photometry measurements and shape moments can reject false positives effectively.
- Subjects
MACHINE learning; ASTRONOMICAL surveys; ASTRONOMICAL instruments; IMAGING systems in astronomy; ASTRONOMICAL photometry
- Publication
Publications of the Astronomical Society of Japan, 2018, Vol 70, Issue Supp1, p1
- ISSN
0004-6264
- Publication type
Article
- DOI
10.1093/pasj/psx042