1. Introduction  
2. Observations and Data Reduction  
2.1. The XMM-Newton Survey of the SMC  
2.2. Radio Observations of the SMC  
2.3. Correlation  
3. Results and Discussion  
3.1. Correlation Statistics  
3.2. Spectral Characteristics  
3.3. Galaxies  
3.4. Galactic Stars  
3.5. Cluster of Galaxies  
3.6. X-ray Binaries  
3.7. Pulsar Wind Nebulae  
3.8. Comparison with Previous Studies  
4. Conclusions