Photometric Redshift Calibration with Self Organising Maps

@article{Wright2019PhotometricRC,
  title={Photometric Redshift Calibration with Self Organising Maps},
  author={A. Wright and H. Hildebrandt and J. Busch and C. Heymans},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
  year={2019}
}
  • A. Wright, H. Hildebrandt, +1 author C. Heymans
  • Published 2019
  • Physics
  • arXiv: Cosmology and Nongalactic Astrophysics
  • Accurate photometric redshift calibration is central to the robustness of all cosmology constraints from cosmic shear surveys. Analyses of the KiDS re-weighted training samples from all overlapping spectroscopic surveys to provide a direct redshift calibration. Using self-organising maps (SOMs) we demonstrate that this spectroscopic compilation is sufficiently complete for KiDS, representing $99\%$ of the effective 2D cosmic shear sample. We use the SOM to define a $100\%$ represented `gold… CONTINUE READING
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