Each source has an associated “quality flag”. The flag settings are shown in the following table.
|
BIT NUMBER |
REASON | INTEGER VALUE | Region Colour |
|---|---|---|---|
| 0 | BAD PIXEL | 1 | red |
| 1 | READ-OUT STREAK | 2 | magenta |
| 2 | SMOKE-RING | 4 | yellow |
| 3 | SOURCE ON STAR-SPIKE | 8 | white |
| 4 | Mod-8 pattern | 16 | black |
| 5 | Source within central enhancement | 32 | red |
| 6 | Source lies near to a bright source | 64 | black |
| 7 | Near an edge | 128 | blue |
| 8 | point-source within extended source | 256 | blue |
| 9 | Weird source | 512 | red |
| 10 | Multiple exposure values within photometry aperture | 1024 | red |
