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Shape measurement by using basis functions

Published online by Cambridge University Press:  30 January 2013

Guoliang Li ,
Bo Xin  and
Wei Cui
Guoliang Li
Affiliation:
Purple Mountain Observatory, Chinese Academy of Sciences, 2 West Beijing Road, Nanjing 210008, China. email: guoliang@pmo.ac.cn Department of Physics, Purdue University, 525 Northwestern Ave., West Lafayette, Indiana 47907
Bo Xin
Affiliation:
Department of Physics, Purdue University, 525 Northwestern Ave., West Lafayette, Indiana 47907
Wei Cui
Affiliation:
Department of Physics, Purdue University, 525 Northwestern Ave., West Lafayette, Indiana 47907
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Abstract

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Gravitational lensing is one of most promising tools to probe dark energy and dark matter in our Universe. Lensing by larger-scale structures distorts the shape of background galaxies. For ground-based observations the shape is further distorted by atmospheric turbulence and optical distortions. Many algorithms were proposed to measure the shear signal but the systematic biases are still too large to be acceptable for the larger-sky surveys in the future. I will present our new algorithms for PSF reconstruction and shape measurements based on several sets of basis functions.

Keywords

gravitational lensingshapemodel fittingbasis function
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S288: Astrophysics from Antarctica , August 2012 , pp. 306 - 308
Copyright
Copyright © International Astronomical Union 2013

References

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