TY - UNPB
T1 - Euclid preparation. LensMC, weak lensing cosmic shear measurement with forward modelling and Markov Chain Monte Carlo sampling
AU - Euclid Collaboration
AU - Congedo, G.
AU - Miller, L.
AU - Taylor, A. N.
AU - Cross, N.
AU - Duncan, C. A. J.
AU - Kitching, T.
AU - Martinet, N.
AU - Valentijn, E. A.
PY - 2024/5/1
Y1 - 2024/5/1
N2 - LensMC is a weak lensing shear measurement method developed for Euclid and Stage-IV surveys. It is based on forward modelling to deal with convolution by a point spread function with comparable size to many galaxies; sampling the posterior distribution of galaxy parameters via Markov Chain Monte Carlo; and marginalisation over nuisance parameters for each of the 1.5 billion galaxies observed by Euclid. The scientific performance is quantified through high-fidelity images based on the Euclid Flagship simulations and emulation of the Euclid VIS images; realistic clustering with a mean surface number density of 250 arcmin$^{-2}$ ($I_{\rm E}
AB - LensMC is a weak lensing shear measurement method developed for Euclid and Stage-IV surveys. It is based on forward modelling to deal with convolution by a point spread function with comparable size to many galaxies; sampling the posterior distribution of galaxy parameters via Markov Chain Monte Carlo; and marginalisation over nuisance parameters for each of the 1.5 billion galaxies observed by Euclid. The scientific performance is quantified through high-fidelity images based on the Euclid Flagship simulations and emulation of the Euclid VIS images; realistic clustering with a mean surface number density of 250 arcmin$^{-2}$ ($I_{\rm E}
KW - Astrophysics - Cosmology and Nongalactic Astrophysics
KW - Physics - Data Analysis
KW - Statistics and Probability
KW - Statistics - Computation
U2 - 10.48550/arXiv.2405.00669
DO - 10.48550/arXiv.2405.00669
M3 - Preprint
BT - Euclid preparation. LensMC, weak lensing cosmic shear measurement with forward modelling and Markov Chain Monte Carlo sampling
PB - arXiv
ER -