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Sérsic galaxy models in weak lensing shape measurement: model bias, noise bias and their interaction
Tomasz Kacprzak, Sarah Bridle, Barnaby Rowe +4
Cosmic shear is a powerful probe of cosmological parameters, but its potential can be fully utilised only if galaxy shapes are measured with great accuracy. Two major effects have…
The Third Gravitational Lensing Accuracy Testing (GREAT3) Challenge Handbook
Rachel Mandelbaum, Barnaby Rowe, James Bosch +28
The GRavitational lEnsing Accuracy Testing 3 (GREAT3) challenge is the third in a series of image analysis challenges, with a goal of testing and facilitating the development of me…
Gaussian Process for star and planet characterisation
C. Danielski, T. Kacprzak, G. Tinetti +1
The study of exoplanetary atmospheres epitomises a continuous quest for higher accuracy measurements. Systematic effects and noise associated with both the stellar activity and the…
IM3SHAPE: A maximum-likelihood galaxy shear measurement code for cosmic gravitational lensing
Joe Zuntz, Tomasz Kacprzak, Lisa Voigt +3
We present and describe im3shape, a new publicly available galaxy shape measurement code for weak gravitational lensing shear. im3shape performs a maximum likelihood fit of a bulge…