Microlensing by non-compact objects

The microlensing of the distant stars by neutralino stars has been considered. The neutralino stars have been considered in the recent paper of Gurevich and Zybin, moreover, the stars have been suggested to be regard as a component, carrying a major component of dark matter. The optics of these gravitational microlenses, namely, the gravitational lens equation, its solutions, magnifications, critical and caustic curves, light curves are analysed by using a clear approximation. A set of model parameters is considered.