Speaker
Shun-Sheng Li
(Leiden University)
Description
Weak gravitational lensing, the deflection of light rays caused by the inhomogeneous matter distributions, has been a powerful tool for observational cosmology. While promising in the application, it is demanding to measure the weak lensing signals to the desired accuracy in practice. With the ever-growing statistical powers of weak lensing surveys, it is critical to address any potential systematic uncertainties for reliable outcomes. In this proposed talk, I will present some recent developments in the calibration techniques we conducted in the kilo-degree survey. Specifically, I will introduce the multi-band image simulations we built to calibrate both shear and redshift measurements.
