1 INTRODUCTION  
2 DATA  
2.1 The Dark Energy Survey  
2.2 Low \( z \) SN Samples  
2.3 Host Galaxy Photometric Redshifts  
3 SIMULATIONS  
3.1 Simulation Overview  
3.2 Host Galaxy Library  
3.3 Redshift Efficiency  
4 ANALYSIS  
4.1 Light-curve Fitting  
4.2 SN+host Photometric Redshifts  
4.3 Sample Selection  
4.4 Data and Simulation Comparison  
4.5 SN Classification  
4.6 BEAMS with Bias Corrections  
4.7 Distance Uncertainties  
4.8 Cosmological Parameter Inference  
5 RESULTS  
5.1 Impact on Light-curve and Nuisance Parameters  
5.2 Cosmology Results from Simulations  
5.3 Cosmology Results from Data  
5.4 Error Scaling for Distance Modulus Uncertainties  
6 DISCUSSION  
6.1 Systematic Uncertainties  
6.2 Future Work  
7 CONCLUSION