Corpus ID: 116427404

Controlling intrinsic alignments in weak lensing statistics: The nulling and boosting techniques

@article{Joachimi2010ControllingIA,
  title={Controlling intrinsic alignments in weak lensing statistics: The nulling and boosting techniques},
  author={Benjamin Joachimi and P. Christian Schneider},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
  year={2010}
}
The intrinsic alignment of galaxies constitutes the major astrophysical source of systematic errors in surveys of weak gravitational lensing by the large-scale structure. We discuss the principles, summarise the implementation, and highlight the performance of two model-independent methods that control intrinsic alignment signals in weak lensing data: the nulling technique which eliminates intrinsic alignments to ensure unbiased constraints on cosmology, and the boosting technique which… Expand

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References

Euclid Assessment Study Report for the ESA Cosmic Visions
Euclid is a proposed high-precision survey mission to map the geometry of the Dark Universe with demonstrated feasibility. Euclid's Visible - Near-InfraRed imaging and spectroscopy of theExpand