Things marked in bold are changes compared to what was already in ipptopsps. Things marked EAM I would like guidance on from EAM to make sure the description is correct.
Image Flags
| NEW | 0x00000000 | 0 | No relphot / relastro attempted.
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| PHOTOM_NOCAL | 0x00000001 | 1 | Used within relphot to mean 'don't apply fit'. | user-set value used withing relphot: ignore (EAM!)
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| PHOTOM_POOR | 0x00000002 | 2 | Relphot says image is bad (dMcal > limit). (EAM!)
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| PHOTOM_SKIP | 0x00000004 | 4 | External information image has bad photometry (EAM).
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| PHOTOM_FEW | 0x00000008 | 8 | Currently too few measurements for good value for photometry.
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| ASTROM_NOCAL | 0x00000010 | 16 | User-set value used within relastro: ignore (EAM!).
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| ASTROM_POOR | 0x00000020 | 32 | Relastro says image is bad (dR,dD > limit).
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| ASTROM_FAIL | 0x00000040 | 64 | Relastro fit diverged, fit not applied.
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| ASTROM_SKIP | 0x00000080 | 128 | External information image has bad astrometry. (EAM)
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| ASTROM_FEW | 0x00000100 | 256 | Currently too few measurements for good value for astrometry.
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| PHOTOM_UBERCAL | 0x00000200 | 512 | Externally-supplied photometry zero point from ubercal analysis.
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| ASTROM_GMM | 0x00000400 | 1024 | Image was fitted to positions corrected by the galaxy motion model.
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Detection Flags
| DEFAULT | 0x00000000 | 0 | Initial value; resets all bits.
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| PSFMODEL | 0x00000001 | 1 | Source fitted with a psf model (linear or non-linear).
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| EXTMODEL | 0x00000002 | 2 | Source fitted with an extended-source model.
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| FITTED | 0x00000004 | 4 | Source fitted with non-linear model (PSF or EXT; good or bad).
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| FAIL | 0x00000008 | 8 | Fit (non-linear) failed (non-converge, off-edge, run to zero).
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| POOR | 0x00000010 | 16 | Fit succeeds, but low-S/N, high-Chisq, or large (for PSF -- drop?).
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| PAIR | 0x00000020 | 32 | Source fitted with a double PSF.
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| PSFSTAR | 0x00000040 | 64 | Source used to define PSF model.
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| SATSTAR | 0x00000080 | 128 | Source model peak is above saturation.
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| BLEND | 0x00000100 | 256 | Source is a blend with other sources.
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| EXTERNAL | 0x00000200 | 512 | Source based on supplied input position.
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| BADPSF | 0x00000400 | 1024 | Failed to get good estimate of object's PSF.
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| DEFECT | 0x00000800 | 2048 | Source is thought to be a defect.
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| SATURATED | 0x00001000 | 4096 | Source is thought to be saturated pixels (bleed trail).
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| CR_LIMIT | 0x00002000 | 8192 | Source has crNsigma above limit.
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| EXT_LIMIT | 0x00004000 | 16384 | Source has extNsigma above limit.
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| MOMENTS_FAILURE | 0x00008000 | 32768 | Could not measure the moments.
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| SKY_FAILURE | 0x00010000 | 65536 | Could not measure the local sky.
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| SKYVAR_FAILURE | 0x00020000 | 131072 | Could not measure the local sky variance.
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| BELOW_MOMENTS_SN | 0x00040000 | 262144 | Moments not measured due to low S/N.
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| UNDEF_1 | 0x00080000 | 524288 | Unused bit value.
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| BIG_RADIUS | 0x00100000 | 1048576 | Poor moments for small radius, try large radius.
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| AP_MAGS | 0x00200000 | 2097152 | Source has an aperture magnitude.
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| BLEND_FIT | 0x00400000 | 4194304 | Source was fitted as a blend.
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| EXTENDED_FIT | 0x00800000 | 8388608 | Full extended fit was used.
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| EXTENDED_STATS | 0x01000000 | 16777216 | Extended aperture stats calculated.
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| LINEAR_FIT | 0x02000000 | 33554432 | Source fitted with the linear fit.
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| NONLINEAR_FIT | 0x04000000 | 67108864 | Source fitted with the non-linear fit.
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| RADIAL_FLUX | 0x08000000 | 134217728 | Radial flux measurements calculated.
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| SIZE_SKIPPED | 0x10000000 | 268435456 | Size could not be determined.
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| PEAK_ON_SPIKE | 0x20000000 | 536870912 | Peak lands on diffraction spike.
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| PEAK_ON_GHOST | 0x40000000 | 1073741824 | Peak lands on ghost or glint.
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| PEAK_OFF_CHIP | 0x80000000 | 2147483648 | Peak lands off edge of chip.
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