Title: Weak lensing study in VOICE survey

Speaker: 傅丽萍 教授 (基金委优秀青年)

Institute: 上海师范大学(SHNU)

Time: 2018.03.29（Thursday） 15:30

Place: Physics Building 552, Haiyun Campus, Xiamen University

Abstract: The VST Optical Imaging of the CDFS and ES1 Fields (VOICE) Survey is a VST INAF Guaranteed Time program proposed to provide deep optical imaging covering two 4 deg^2 cosmic windows. I will present the cosmic shear measurement of four tiles of CDFS sub-field in r-band using Lensfit. Each tile has more than one hundred exposures to

reach deep imaging. The r-band co-added image reaches 5 sigma limiting magnitude r = 26.1 for point sources, which is 1.2 mag deeper than KiDS. The performance of Lensfit on deep imaging was calibrated using VOICE-like simulation. As a sanity check, we constrain cosmological parameters by exploring the parameter space with Population Monte Carlo sampling.