All images, warps and stacks, have mask images which indicate image flags for each individual pixels. Below is a table that indicates the meaning for each flag. These flags are applicable for both, the warp and stack images.
Image Flags
Mask values which represent features of the detector
| Flag name | hexadecimal value | Description |
|---|---|---|
| FLAT | 0x0002 | Pixel doesn't flat-field properly |
| DARK | 0x0004 | Pixel doesn't dark-subtract properly |
| BLANK | 0x0008 | Pixel doesn't contain valid data |
| CTE | 0x0010 | Pixel has poor Charge Transfer Effici |
| SAT | 0x0020 | Pixel is saturated or non-linear |
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