Real-Time Changing-State Quasar Detection
Real-time detection of changing-state quasars using a Mixture Density Network.
2021.01 – 2025.12
·Motivation
Reliably detect changes in quasar (QSO) light curves in real time and describe these changes quantitatively for easy understanding.
·Methodology
- Apply physics-based transformation to irregularly observed astronomical time series.
- Estimate the probability of being normal at each time using a conditional density model on the transformed data.
- Detect outliers when data deviating from normal probability arrives, defining this as a changing state.
·Contribution
- Understand QSO state changes and identify their physical mechanisms.
- Selectively identify reliable targets for spectroscopic follow-up, improving efficiency.
- Understand and explore supermassive black holes.
