Integrated Sachs-Wolfe Imprint of Superstructures on Linear Scales

We build a model for the density and integrated Sachs-Wolfe (ISW) profile of supervoid and supercluster structures. Our model assumes that fluctuations evolve linearly from an initial Gaussian random field. We find these assumptions capable of describing N-body simulations and simulated ISW maps remarkably well on large scales. We construct an ISW map based on locations of superstructures identified previously in the SDSS Luminous Red Galaxy sample. A matched filter analysis of the cosmic microwave background confirms a signal at the 3. 2- confidence level and estimates the radius of the underlying structures to be 55 28 ~h^-1Mpc. The amplitude of the signal, however, is 2- higher than CDM predictions.