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GREAT3 results I: systematic errors in shear estimation and the impact of real galaxy morphology
Rachel Mandelbaum, Barnaby Rowe, Robert Armstrong +40
We present first results from the third GRavitational lEnsing Accuracy Testing (GREAT3) challenge, the third in a sequence of challenges for testing methods of inferring weak gravi…
Hierarchical probabilistic inference of cosmic shear
Michael D. Schneider, David W. Hogg, Philip J. Marshall +4
Point estimators for the shearing of galaxy images induced by gravitational lensing involve a complex inverse problem in the presence of noise, pixelization, and model uncertaintie…
Impact of Atmospheric Chromatic Effects on Weak Lensing Measurements
Joshua E. Meyers, Patricia R. Burchat
Current and future imaging surveys will measure cosmic shear with statistical precision that demands a deeper understanding of potential systematic biases in galaxy shape measureme…
GalSim: The modular galaxy image simulation toolkit
Barnaby Rowe, Mike Jarvis, Rachel Mandelbaum +12
GALSIM is a collaborative, open-source project aimed at providing an image simulation tool of enduring benefit to the astronomical community. It provides a software library for gen…
Impact of chromatic effects on galaxy shape measurements
J. E. Meyers, P. R. Burchat
Current and future imaging surveys will measure cosmic shear with a statistical precision that demands a deeper understanding of potential systematic biases in galaxy shape measure…