| 1 | neighbouring objects may have an influence on the photometry of the object |
| 2 | object was originally blended with another object |
| 4 | at least one pixel is saturated |
| 8 | object was truncated due to proximity to the boundary of an image |
| 16 | object's aperture data is incomplete or corrupted |
| 32 | object's isophotal data is incomplete or corrupted |