1. Introduction  
2. Analysis  
2.1. Sample Definition  
2.2. Analysis Procedure  
2.3. Separation of Diffuse from Compact Emission  
2.4. Halo Simulations  
2.5. Detection Threshold  
2.6. Contributions from Extended Sources  
3. Results  
4. Discussion  
4.1. Comparisons to Earlier Work  
4.2. Notes on Physical Implications  
5. Concluding Remarks