The impact of correlated noise on galaxy shape estimation for weak lensing

• Published in: Monthly notices of the Royal Astronomical Society Vol. 457; no. 4; pp. 3522 - 3534
• Main Authors: Gurvich, Alex, Mandelbaum, Rachel
• Format: Journal Article
• Language: English
• Published: London Oxford University Press 21.04.2016
• Subjects: Anisotropy; Astronomy; Bias; Correlation; Correlation analysis; Distortion; Estimates; Galactic structure; Galaxies; Measurement techniques; Noise; Pixels; Star & galaxy formation; gravitational lensing: weak; techniques: image processing

The robust estimation of the tiny distortions (shears) of galaxy shapes caused by weak gravitational lensing in the presence of much larger shape distortions due to the point spread function (PSF) has been widely investigated. One major problem is that most galaxy shape measurement methods are subje...