Keywords: Surveys (1671), Quasars (1319), High-redshift galaxies (734), Photometry (1234), Astronomical techniques (1684)

1. INTRODUCTION

2. DATASETS AND PREPARATION  
2.1. Imaging Data  
2.2. Data Organization Terminology  
2.3. Astrometric Calibration of Imaging Data  
2.4. PSF Estimation  

3. JOINT CATALOGING WITH TRACTOR

4. SELECTION OF QUASARS CANDIDATES  
4.1. Selection by Color and Compactness  
4.2. Visual Inspection  

5. DISCUSSION  
5.2. Estimated Contribution to Reionization

6. CONCLUSIONS