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 ===
'''(most are different from what was previously there (and there are now twice as many flags)'''

||NEW||0x00000000||0||No relphot / relastro attempted.||
||PHOTOM_NOCAL||0x00000001||1||'''Used within relphot to mean 'don't apply fit'. | user-set value used withing relphot: ignore (EAM!)'''||
||PHOTOM_POOR||0x00000002||2||'''Relphot says image is bad (dMcal > limit). (EAM!)'''||          
||PHOTOM_SKIP||0x00000004||4||'''External information image has bad photometry (EAM).'''||
||PHOTOM_FEW||0x00000008||8||'''Currently too few measurements for good value for photometry.'''||          
||ASTROM_NOCAL||0x00000010||16||'''User-set value used within relastro: ignore (EAM!).'''||
||ASTROM_POOR||0x00000020||32||'''Relastro says image is bad (dR,dD > limit).'''||
||ASTROM_FAIL||0x00000040||64||'''Relastro fit diverged, fit not applied.'''||
||ASTROM_SKIP||0x00000080||128||'''External information image has bad astrometry. (EAM)'''||
||ASTROM_FEW||0x00000100||256||'''Currently too few measurements for good value for astrometry.'''||
||PHOTOM_UBERCAL||0x00000200||512||'''Externally-supplied photometry zero point from ubercal analysis.'''||
||ASTROM_GMM||0x00000400||1024||'''Image was fitted to positions corrected by the galaxy motion model.'''||

=== Detection Flags ===

||DEFAULT||0x00000000||0         ||Initial value; resets all bits.||
||PSFMODEL||0x00000001||1         ||Source fitted with a psf model (linear or non-linear).||
||EXTMODEL||0x00000002||2         ||Source fitted with an extended-source model.||
||FITTED||0x00000004||4         ||Source fitted with non-linear model (PSF or EXT; good or bad).||
||FAIL||0x00000008||8         ||Fit (non-linear) failed (non-converge, off-edge, run to zero).||
||POOR||0x00000010||16        ||Fit succeeds, but low-S/N, high-Chisq, or large (for PSF -- drop?).||
||PAIR||0x00000020||32        ||Source fitted with a double PSF.||
||PSFSTAR||0x00000040||64        ||Source used to define PSF model.||
||SATSTAR||0x00000080||128       ||Source model peak is above saturation.||
||BLEND||0x00000100||256       ||Source is a blend with other sources.||
||EXTERNAL||0x00000200||512       ||Source based on supplied input position.||
||BADPSF||0x00000400||1024      ||Failed to get good estimate of object's PSF.||
||DEFECT||0x00000800||2048      ||Source is thought to be a defect.||
||SATURATED||0x00001000||4096      ||Source is thought to be saturated pixels (bleed trail).||
||CR_LIMIT||0x00002000||8192      ||Source has crNsigma above limit.||
||EXT_LIMIT||0x00004000||16384     ||Source has extNsigma above limit.||
||MOMENTS_FAILURE||0x00008000||32768     ||Could not measure the moments.||
||SKY_FAILURE||0x00010000||65536     ||Could not measure the local sky.||
||SKYVAR_FAILURE||0x00020000||131072    ||Could not measure the local sky variance.||
||BELOW_MOMENTS_SN||0x00040000||262144    ||Moments not measured due to low S/N.||
||UNDEF_1||0x00080000||524288    ||Unused bit value.||
||BIG_RADIUS||0x00100000||1048576   ||Poor moments for small radius, try large radius.||
||AP_MAGS||0x00200000||2097152   ||Source has an aperture magnitude.||
||BLEND_FIT||0x00400000||4194304   ||Source was fitted as a blend.||
||EXTENDED_FIT||0x00800000||8388608   ||Full extended fit was used.||
||EXTENDED_STATS||0x01000000||16777216  ||Extended aperture stats calculated.||
||LINEAR_FIT||0x02000000||33554432  ||Source fitted with the linear fit.||
||NONLINEAR_FIT||0x04000000||67108864  ||Source fitted with the non-linear fit.||
||RADIAL_FLUX||0x08000000||134217728 ||Radial flux measurements calculated.||
||SIZE_SKIPPED||0x10000000||268435456 ||Size could not be determined.||
||PEAK_ON_SPIKE||0x20000000||536870912 ||Peak lands on diffraction spike.||
||PEAK_ON_GHOST||0x40000000||1073741824||Peak lands on ghost or glint.||
||PEAK_OFF_CHIP||0x80000000||2147483648||Peak lands off edge of chip.||

=== Detection Flags 2 ===

||DEFAULT||0x00000000||0         ||Initial value; resets all bits.||
||DIFF_WITH_SINGLE||0x00000001||1         ||Difference source matched to a single positive detection.||
||DIFF_WITH_DOUBLE||0x00000002||2         ||Difference source matched to positive detections in both images.||
||MATCHED||0x00000004||4         ||source generated based on another image (forced photometry at source location).||
||ON_SPIKE||0x00000008||8         ||More than 25% of (PSF-weighted) pixels land on diffraction spike.||
||ON_STARCORE||0x00000010||16        ||More than 25% of (PSF-weighted) pixels land on starcore.||
||ON_BURNTOOL||0x00000020||32        ||More than 25% of (PSF-weighted) pixels land on burntool.||
||ON_CONVPOOR||0x00000040||64        ||More than 25% of (PSF-weighted) pixels land on convpoor.||
||PASS1_SRC||0x00000080||128       ||Source detected in first pass analysis||
||HAS_BRIGHTER_NEIGHBOR||0x00000100||256       ||Peak is not the brightest in its footprint||
||BRIGHT_NEIGHBOR_1||0x00000200||512       ||Flux_negative / (r^2 flux_positive) > 1.||
||BRIGHT_NEIGHBOR_10||0x00000400||1024      ||Flux_negative / (r^2 flux_positive) > 10.||
||DIFF_SELF_MATCH||0x00000800||2048      ||Positive detection match is probably this source.||
||SATSTAR_PROFILE||0x00001000||4096      ||Saturated source is modeled with a radial profile.||
||ECONTOUR_FEW_PTS||0x00002000||8192     ||Too few points to measure the elliptical contour.||
||RADBIN_NAN_CENTER||0x00004000||16384    ||Radial bins failed with too many NaN center bin.||
||PETRO_NAN_CENTER||0x00008000||32768    ||Petrosian (1976) radial bins failed with too many NaN center bin.||
||PETRO_NO_PROFILE||0x00010000||65536    ||Petrosian (1976) not built becaues radial bins missing.||
||PETRO_INSIG_RATIO||0x00020000||131072   ||Insignificant measurement of Petrosian (1976) ratio.||
||PETRO_RATIO_ZEROBIN||0x00040000||262144   ||Petrosian (1976) ratio in the 0th bin (likely bad).||
||EXT_FITS_RUN||0x00080000||524288   ||Attempted to run extended fits on this source.||
||EXT_FITS_FAIL||0x00100000||1048576  ||At least one of the model fits failed.||
||EXT_FITS_RETRY||0x00200000||2097152  ||One of the model fits was retried with new window.||
||EXT_FITS_NONE||0x00400000||4194304  ||All of the model fits failed.||



=== Detection Flags 3 ===

||DEFAULT||0x00000000||0||Initial value; resets all bits.||
||NOCAL||0x00000001||1||Detection ignored for this analysis (photcode, time range) -- internal only.||
||POOR_PHOTOM||0x00000002||2||Detection is photometry outlier.||
||SKIP_PHOTOM||0x00000004||4||Detection was ignored for photometry measurement.||  
||AREA||0x00000008||8||Detection near image edge.||  
||POOR_ASTROM||0x00000010||16         ||Detection is astrometry outlier.||    
||SKIP_ASTROM||0x00000020||32         ||Detection was ignored for astrometry measurement.||      
||USED_OBJ||0x00000040||64         ||Detection was used during update objects||
||USED_CHIP||0x00000080||128        ||Detection was used during update chips to measure astrometry with IRLS fit.||
||BLEND_MEAS||0x00000100||256        ||Detection is within radius of multiple objects.||
||BLEND_OBJ||0x00000200||512        ||Multiple detections within radius of object.||
||WARP_USED||0x00000400||1024       ||Measurement used to find mean warp photometry.||
||UNMASKED_ASTRO||0x00000800||2048       ||Detection was unmasked in update chips to determine astrometry parameter errors.||
||BLEND_MEAS_X||0x00001000||4096       ||Detection is within radius of multiple objects across catalogs.||     
||ARTIFACT||0x00002000||8192       ||Detection is thought to be non-astronomical.||        
||SYNTH_MAG||0x00004000||16384      ||Magnitude is synthetic.||
||PHOTOM_UBERCAL||0x00008000||32768      ||Externally-supplied zero point from ubercal analysis.||
||STACK_PRIMARY||0x00010000||65536      ||This stack measurement is in the primary skycell.||  
||STACK_PHOT_SRC||0x00020000||131072     ||This measurement supplied the stack photometry.||
||ICRF_QSO||0x00040000||262144     ||This measurement is an ICRF reference position.||
||IMAGE_EPOCH||0x00080000||524288     ||This measurement is registered to the image epoch (not tied to the reference catalog epoch).||
||PHOTOM_PSF||0x00100000||1048576    ||This measurement is used for the mean PSF magnitude.||
||PHOTOM_APER||0x00200000||2097152    ||This measurement is used for the mean aperture magnitude.||
||PHOTOM_KRON||0x00400000||4194304    ||This measurement is used for the mean Kron (1980) magnitude.||
||MASKED_PSF||0x01000000||16777216   ||This measurement is masked based on IRLS weights for the mean PSF magnitude.||
||MASKED_APER||0x02000000||33554432   ||This measurement is masked based on IRLS weights for the mean aperture magnitude.||
||MASKED_KRON||0x04000000||67108864   ||This measurement is masked based on IRLS weights for the mean Kron (1980) magnitude.||
||OBJECT_HAS_2MASS||0x10000000||268435456  ||'''This measurement comes from an object with 2MASS data.'''||
||OBJECT_HAS_GAIA||0x20000000||536870912  ||'''This measurement comes from an object with Gaia data.'''||
||OBJECT_HAS_TYCHO||0x40000000||1073741824 ||'''This measurement comes from an object with Tycho data.'''||

=== Object Info Flags === 

||DEFAULT||0x00000000||0    ||Initial value; resets all bits.||
||FEW||0x00000001||1    ||Used within relphot; skip star.||
||POOR||0x00000002||2    ||Used within relphot; skip star.||
||ICRF_QSO||0x00000004||4    ||object IDed with known ICRF quasar (may have ICRF position measurement)||
||HERN_QSO_P60||0x00000008||8    ||identified as likely QSO (Hernitschek et al 2015), P_QSO >= 0.60||
||HERN_QSO_P05||0x00000010||16   ||identified as possible QSO (Hernitschek et al 2015), P_QSO >= 0.05||
||HERN_RRL_P60||0x00000020||32   ||identified as likely RR Lyra (Hernitschek et al 2015), P_RRLyra >= 0.60||
||HERN_RRL_P05||0x00000040||64   ||identified as possible RR Lyra (Hernitschek et al 2015), P_RRLyra >= 0.05||
||HERN_VARIABLE||0x00000080||128  ||identified as a variable based on ChiSq (Hernitschek et al 2015)||
||TRANSIENT||0x00000100||256  ||identified as a non-periodic (stationary) transient||
||HAS_SOLSYS_DET||0x00000200||512  ||at least one detection identified with a known solar-system object (asteroid or other).||
||MOST_SOLSYS_DET||0x00000400||1024 ||most detections identified with a known solar-system object (asteroid or other).||
||LARGE_PM||0x00000800||2048 ||star with large proper motion||
||RAW_AVE||0x00001000||4096 ||simple weighted average position was used (no IRLS fitting)||
||FIT_AVE||0x00002000||8192 ||average position was fitted||
||FIT_PM||0x00004000||16384||proper motion model was fitted||
||FIT_PAR||0x00008000||32768||parallax model was fitted||
||USE_AVE||0x00010000||65536||average position used (not PM or PAR)||
||USE_PM||0x00020000||131072         ||proper motion used (not AVE or PAR)||
||USE_PAR||0x00040000||262144         ||parallax used (not AVE or PM)||
||NO_MEAN_ASTROM||0x00080000||524288         ||mean astrometry could not be measured||
||STACK_FOR_MEAN||0x00100000||1048576        ||stack position used for mean astrometry||
||MEAN_FOR_STACK||0x00200000||2097152        ||mean astrometry used for stack position||
||BAD_PM||0x00400000||4194304        ||failure to measure proper-motion model||
||EXT||0x00800000||8388608        ||extended in our data (eg, PS)||
||EXT_ALT||0x01000000||16777216       ||extended in external data (eg, 2MASS)||
||GOOD||0x02000000||33554432       ||good-quality measurement in our data (eg,PS)||
||GOOD_ALT||0x04000000||67108864       ||good-quality measurement in  external data (eg, 2MASS)||
||GOOD_STACK||0x08000000||134217728      ||good-quality object in the stack (> 1 good stack measurement)||
||BEST_STACK||0x10000000||268435456      ||the primary stack measurements are the best measurements||
||SUSPECT_STACK||0x20000000||536870912      ||suspect object in the stack (no more than 1 good measurement, 2 or more suspect or good stack measurement)||
||BAD_STACK||0x40000000||1073741824     ||poor-quality stack object (no more than 1 good or suspect measurement)||

=== Object Filter Flags ===

||DEFAULT||0x00000000||0    ||Initial value; resets all bits.||
||SECF_STAR_FEW||0x00000001||1    ||Used within relphot: skip star.||
||SECF_STAR_POOR||0x00000002||2    ||Used within relphot: skip star.||
||SECF_USE_SYNTH||0x00000004||4    ||Synthetic photometry used in average measurement.||
||SECF_USE_UBERCAL||0x00000008||8    ||Ubercal photometry used in average measurement.||
||SECF_HAS_PS1||0x00000010||16   ||PS1 photometry used in average measurement.||
||SECF_HAS_PS1_STACK||0x00000020||32   ||PS1 stack photometry exists.||
||SECF_HAS_TYCHO||0x00000040||64   ||Tycho photometry used for synthetic magnitudes.||
||SECF_FIX_SYNTH||0x00000080||128  ||Synthetic magnitudes repaired with zeropoint map.||
||SECF_RANK_0||0x00000100||256  ||Average magnitude uses only rank 0 detections.||
||SECF_RANK_1||0x00000200||512  ||Average magnitude uses only rank 1 detections.||
||SECF_RANK_2||0x00000400||1024 ||Average magnitude uses only rank 2 detections.||
||SECF_RANK_3||0x00000800||2048 ||Average magnitude uses only rank 3 detections.||
||SECF_RANK_4||0x00001000||4096 ||Average magnitude uses only rank 4 detections.||
||SECF_STACK_PRIMARY||0x00004000||16384||PS1 stack photometry comes from primary skycell.||
||SECF_STACK_BESTDET||0x00008000||32768||PS1 stack best measurement is a detection (not forced).||
||SECF_STACK_PRIMDET||0x00010000||65536||PS1 stack primary measurement is a detection (not forced).||
||SECF_HAS_SDSS||0x00100000||1048576        ||'''This photcode has SDSS photometry (EAM??).'''||
||SECF_HAS_HSC||0x00200000||2097152        ||'''This photcode has HSC  photometry (EAM??).'''||
||SECF_HAS_CFH||0x00400000||4194304        ||'''This photcode has CFH  photometry (mostly Megacam) (EAM??).'''||
||SECF_HAS_DES||0x00800000||8388608        ||'''This photcode has DES  photometry (EAM??).'''||
||SECF_OBJ_EXT||0x01000000||16777216       ||Extended in this band.||

=== Object Quality Flags ===

||DEFAULT||0x00000000||0       ||Initial value; resets all bits.||
||QF_OBJ_EXT||0x00000001||1       ||Extended in our data (eg, PS).||
||QF_OBJ_EXT_ALT||0x00000002||2       ||Extended in external data (eg, 2MASS).||
||QF_OBJ_GOOD||0x00000004||4       ||Good-quality measurement in our data (eg,PS).||
||QF_OBJ_GOOD_ALT||0x00000008||8       ||Good-quality measurement in  external data (eg, 2MASS).||
||QF_OBJ_GOOD_STACK||0x00000010||16      ||good-quality object in the stack (> 1 good stack measurement)||
||'''QF_OBJ_BEST_STACK'''||0x00000020||32      ||the primary stack measurements are the best measurements.||
||'''QF_OBJ_SUSPECT_STACK'''||0x00000040||64      ||suspect object in the stack (no more than 1 good measurement, 2 or more suspect or good stack measurement).||
||'''QF_OBJ_BAD_STACK'''||'''0x00000080'''||'''128      '''||poor-quality stack object (no more than 1 good or suspect measurement).||
(last three were all borked in the documentation)

=== Forced Galaxy Shape Flags ===

||NO_ERROR||0x00000000||0 ||No error condition raised.||
||FAIL_FIT||0x00000001||1 ||fit failed to converge or was degenerate||
||TOO_FEW||0x00000002||2 ||not enough points to fit the model||
||OUT_OF_RANGE||0x00000004||4 ||fit minimum too far outside data range||
||BAD_ERROR||0x00000008||8 ||invalid size error (nan or inf)||