Keywords: Galaxy: center; stars: variables: general; stars: binaries: eclipsing; techniques: photometric
1. INTRODUCTION
2. OBSERVATIONS, PHOTOMETRIC CALIBRATION, AND STELLAR SAMPLE
2.1. Observations and Data Reduction
2.2. Systematics from Stellar Confusion and Resolved Sources
2.4. Photometric Calibration
2.5. Final Photometric Quality
2.6. Stellar Sample
3. STELLAR VARIABILITY
3.1. Identifying Variable Stars
3.2. Deriving the Variability Fraction
4. PERIODIC VARIABILITY
4.1. Periodicity Search Implementation
4.2. Definition of Significance
4.3. Aliasing in Periodicity Searches
5. RESULTS
5.1. Variability Fraction
5.2. Periodically Variable Stars
6. DISCUSSION
6.4. The Precision of Single PSF AO Photometry
7. CONCLUSION