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Astrophysics Colloquium

Towards Weak Lensing Measurements with Hyper Suprime-Cam
Presented by Hironao Miyatake
Princeton University

Thursday, October 3, 2013
4:00 P.M. in 169-336

Abstract
Weak gravitational lensing (WL) is a powerful probe of cosmology since it provides unbiased estimates of the large-scale distribution of dark matter and its evolution with cosmic time. To constrain the parameters of the standard model of cosmology through WL, a comprehensive, deep and wide-angle imaging survey, using the Hyper Suprime-Cam (HSC) on the 8.2m Subaru Telescope, will be carried out next year. In this talk I will discuss my recent WL studies. First, I will talk about a WL measurement of a distant (z=0.81) galaxy cluster discovered by the Atacama Cosmology Telescope, and how this study can be extended to the HSC survey. Second, I will talk about GREAT3, a state-of-the-art WL image analysis challenge that allows the public to test and facilitate WL measurement algorithms. I will then discuss how we can make use of GREAT3 for the HSC survey.

JPL Contact: Olivier Doré (4-0690)




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