title: Analytical expression for the average ensquared energy.
abstract: We derive an expression for the average area of intersection between a blur spot of radius R and a square pixel, where the center of the blur is uniformly chosen from the pixel interior. Implications of the result are then discussed in the context of a point source detection problem.
authors.forename: J M
authors.initials: JM
authors.lastname: Nichols
authors.forename: C
authors.initials: C
authors.lastname: Miller