Galaxy-Galaxy lensing in HSC: Validation tests and the impact of heterogeneous spectroscopic training sets

@article{Speagle2019GalaxyGalaxyLI,
  title={Galaxy-Galaxy lensing in HSC: Validation tests and the impact of heterogeneous spectroscopic training sets},
  author={J. Speagle and A. Leauthaud and S. Huang and Christopher P. Bradshaw and F. Ardila and P. Capak and D. J. Eisenstein and D. Masters and R. Mandelbaum and S. More and M. Simet and C. Sif'on},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2019},
  volume={490},
  pages={5658-5677}
}
  • J. Speagle, A. Leauthaud, +9 authors C. Sif'on
  • Published 2019
  • Physics
  • Monthly Notices of the Royal Astronomical Society
  • Although photometric redshifts (photo-z's) are crucial ingredients for current and upcoming large-scale surveys, the high-quality spectroscopic redshifts currently available to train, validate, and test them are substantially non-representative in both magnitude and color. We investigate the nature and structure of this bias by tracking how objects from a heterogeneous training sample contribute to photo-z predictions as a function of magnitude and color, and illustrate that the underlying… CONTINUE READING
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