1 INTRODUCTION  
2 MULTI-WAVELENGTH DATA REDUCTION AND ANALYSIS  
2.1 GD 158 19 in the Context of the HELLAS2XMM Survey  
2.2 Optical Spectroscopic Classification  
2.3 Spitzer Data  
2.4 SCUBA Data  
3 DATA MODELING  
4 RESULTS FROM THE SED FITTING AND DISCUSSION  
5 SUMMARY OF THE RESULTS