Definition of the SExtractor flags

Option: 0 (0=show all flags, x=hexadecimal)

1 The object has neighbours, bright and close enough to significantly bias the MAG AUTO photometry, or bad pixels (more than 10 percent of the integrated area affected)
2 The object was originally blended with another one
4 At least one pixel of the object is saturated (or very close to)
8 The object is truncated (too close to an image boundary)
16 Objects aperture data are incomplete or corrupted
32 Objects isophotal data are incomplete or corrupted
64 A memory overflow occurred during deblending
128 A memory overflow occurred during extraction