1. INTRODUCTION  
1.1. The Galactic Central Molecular Zone  
1.2. Activity of Sgr A\*

2. OBSERVATIONS  
2.1. Mapping  
2.2. Monitoring of Sgr A\*

3. DATA REDUCTION  
3.1. Iterative Cleaning Based on Principal Component Analysis  
3.2. Noise Maps  
3.3. Correction for Pointing Offsets Between Individual Tiles

4. ANALYSIS: MODEL-BASED DECONVOLUTION WITH MCMC  
4.2. Sampling Strategy  
4.3. Smoothness Prior

5. RESULTS  
5.1. High-Resolution Maps of \(N_{H_{2}}\), \(T\) and \(\beta\)  
5.2. Monitoring of Sgr A\*

6. SUMMARY