5 papers
AKRA 3.0: A matrix-free Inversion Framework for Weak Lensing Mass Mapping and Its Application to DES Y3 Data
Yuan Shi, Pengjie Zhang, Li Cui +2
Weak gravitational lensing mass mapping offers a direct probe of the matter distribution. Accurate reconstruction of mass maps from masked shear catalogs remains challenging due to…
The first AKRA mass map reconstruction from HSC Y1 data
Yuan Shi, Pengjie Zhang, Zhao Chen +4
Weak lensing mass-mapping from shear catalogs faces systematic challenges from survey masks and spatially varying noise. To overcome these issues and reconstruct unbiased convergen…
Meta-Calibration of the Cosmic Magnification Coefficient: Toward Unbiased Weak Lensing Reconstruction by Counting Galaxies
Jian Qin, Pengjie Zhang, Zhu Chen +6
Weak lensing alters galaxy sizes and fluxes, influencing the clustering patterns of galaxies through cosmic magnification. This effect enables the reconstruction of weak lensing co…
Weak Lensing Reconstruction by Counting DECaLS Galaxies
Jian Qin, Pengjie Zhang, Haojie Xu +4
Alternative to weak lensing measurements through cosmic shear, we present a weak lensing convergence map reconstructed through cosmic magnification effect in DECaLS galaxi…
Weak Lensing Reconstruction by Counting Galaxies: Improvement with DES Y3 Galaxies
Jian Qin, Pengjie Zhang, Yu Yu +4
In \citep{Qin+}, we attempted to reconstruct the weak lensing convergence map from cosmic magnification by linearly weighting the DECaLS galaxy overdensities in different…