CHAPTER 11: Weak Gravitational Lensing
Weak gravitational lensing is a unique probe of the dark side of the universe. Measurements of the weak lensing-induced distortions of the shapes of distant galaxies provide a direct way to map the distribution of dark matter and to probe dark energy. We discuss how these challenging measurements are made and interpreted. In particular, we describe the work done on weak lensing in the Dark Energy Survey (DES) and the results from the first season of data.