XMM study of the emission lines of the Z-Source GX 349+2

We propose a 40 ks XMM observation of the Z source GX 349+2, to perform adetailed study of the iron Kshell features and other low energy features inthis source. In particular this source is known to show a broad (0.7 keV FWHM)iron K_a line: several hypothesis were proposed to explain the width of theselines (relativistic and Doppler effects in an accretion disk, Comptonscattering, lineblending), and we expect that the good energy resolution of XMMwill be able to resolve the complex line shape and to constrain the variousmodels proposed. Furthermore, since some emission lines were already observed inGX 349+2 with BeppoSAX below 3 keV, a proper study of these low energy featuresare an important diagnostic tool for the physical conditions of the emitting regions. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]