The Nature of Submm-Detected Galaxies
  We present high resolution VLT spectra of 2 submm-detected galaxies. Diagnostic stellar absorption lines (Starburst99) are used to analyse their stellar population. SMM J14011+0252 (z=2.565) shows signs of starburst and SMM J02399-0136 (z=2.808) shows signs of starburst and AGN. A MgII line at z~0.94 is identified in the latter galaxy and could account for an extra magnification factor in this SCUBA source. 
Duilia de Mello, T. Wiklind, C. Leitherer and K. Pontoppidan