  We derive the leading g_s perturbation of the SUGRA fields generated by a
supersymmetric configuration of respectively 1, 2 or 4 D3-branes intersecting
at an arbitrary angle via the computation of the string theory disk scattering
amplitude of one massless NSNS field interacting with open strings stretched
between the branes. The configuration with four branes is expected to be
relevant for black hole microstate counting in four dimensions.
