A novel variability-based method for quasar selection: evidence for a rest-frame ∼54 d characteristic time-scale

@article{Graham2014ANV,
  title={A novel variability-based method for quasar selection: evidence for a rest-frame ∼54 d characteristic time-scale},
  author={M. Graham and S. Djorgovski and A. Drake and A. Mahabal and M. Chang and D. Stern and C. Donalek and E. Glikman},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2014},
  volume={439},
  pages={703-718}
}
We compare quasar-selection techniques based on their optical variability using data from the Catalina Real-time Transient Survey (CRTS). We introduce a new technique based on Slepian wavelet variance (SWV) that shows comparable or better performance to structure functions and damped random walk models but with fewer assumptions. Combining these methods with Wide-field Infrared Survey Explorer mid-IR colours produces a highly efficient quasar-selection technique which we have validated… Expand
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