For 10 points, name this bending of light by namesake massive objects that can only be detected via statistical analysis of mass sources, in contrast to its "strong-" or "micro-" variants.
The Kaiser-Squires method convolves the signal generated by this phenomenon to compute cluster convergence maps. This phenomenon forms the basis for the Suprime-Cam and VIRMOS-DESCART surveys, the latter of which found that the signal generated by this phenomenon has third-order non-Gaussianities. Van Waerbeke derived an upper bound of .4 for the matter density parameter and .7 as a lower bound for the amplitude of the dark matter power spectrum in the lambda-CDM model by assuming that this process causes large-scale structures to produce a coherent shear signal. In general, this phenomenon is best illustrated by collections of galaxies whose intrinsic ellipticies deviate from random-orientation. For 10 points, name this bending of light by namesake massive objects that can only be detected via statistical analysis of mass sources, in contrast to its "strong-" or "micro-" variants.
The Kaiser-Squires method convolves the signal generated by this phenomenon to compute cluster convergence maps.
weak gravitational lensing [accept weak lensing; prompt on gravitational lensing]