“…In the third and fourth sections, using the relative Jacobian, we adapt the construction of Cȃldȃraru, [Cȃl02], to our case, obtaining a twisted Fourier-Mukai transform. Similar results were obtained in different settings by O.Ben-Bassat [BB09] and I.Burban and B.Kreussler [BK06]. In the fifths section using this transform and the associated spectral cover we prove that the moduli space of rank n, relatively semi-stable vector bundles is corepresented by the relative Douady space of length n and relative dimension 0 subspaces of the relative Jacobian, see theorem 5.…”