1. Introduction  
2. X-ray Observations  
2.1 XMM-Newton  
2.2 Chandra  
3. Timing Analysis  
3.1 Chandra  
3.2 XMM-Newton  
4. X-ray Spectral Analysis  
5. Near Infrared Observations  
5.1 UKIDSS Photometry  
5.2 ISAAC Spectrum  
6. Discussion