Self-calibrating weak lensing systematical errors

Pengjie Zhang

April 26, 2010

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Abstract: Weak lensing is one of the most powerful probe of the dark universe. However, it suffers from several major systematical errors. Fortunately, weak lensing surveys contain valuable information to self-calibrate and hence significantly reduce these errors. In this talk, I will present proposals to self-calibrate the intrinsic alignment (both GI and II), photometric redshift errors and the multiplicative errors.