... Laboratoire Signal et Image, Ecole Nationale de Physique de Marseille, Domaine Universitaire de Saint Jerome, 13397 Marseille Cedex 20, France . ... Astronomical ultraviolet images were obtained from a balloon-borne telescope equipped with a photon-counting detector. ... We take advantage of the high temporal resolution available, to significantly reduce, during the image reconstruction process, the blur induced by the residual movements of the guidance system. ... 4) The images are periodic. ...