| Class | %age of 2XMM obs | Definition | Comment |
| 0 | 38% | bad area = 0% | no region has been identified for flagging |
| 1 | 12% | 0% < bad area < 0.1% |  3 single detections |
| 2 | 10% | 0.1% 
bad area < 1% |
circular region with
 |
| 3 | 25% | 1%
bad area < 10% |
circular region with
 |
| 4 | 10% | 10%
bad area < 100% |
circular region with
 |
| 5 | 5% | bad area = 100% | the whole field is flagged as bad |