This program calculates the femtolensing [1] signature of a point mass lens. Femtolensing is analogous to diffraction of laser light by a single slit, but the laser is replaced by an astrophysical object that emits gamma-rays and the slit is replaced by the curved space-time in the neighbourhood of a low-mass object, i.e., a gravitational lens. See Figure 1. For more information about the mathematical model, see [2]. For a discussion about observations, see [2,3] and references therein. Inputs should be specified below.
[1] A. Gould, ApJ 386, L5-L7 (1992).
[2] K.Z. Stanek, B. Paczynski and J. Goodman, ApJ 413, L7-L10 (1993).
[3] G.F. Marani, R.J. Nemiroff, J.P. Norris, K. Hurley and J.T. Bonnell, ApJ 512, L13-L16 (1999).