Definition of the characteristic flags

0	Initial value; resets all bits
1	Used within relphot (FEW): skip star
2	Used within relphot (POOR): skip star
4	Object IDed with known ICRF quasar (may have ICRF position measurement)
8	Identified as likely QSO (Hernitschek+ 2015ApJ...801...45H), P_QSO_>=0.60
16	Identified as possible QSO (Hernitschek+ 2015ApJ...801...45H), P_QSO_>=0.05
32	Identified as likely RR Lyra (Hernitschek+ 2015ApJ...801...45H), P_QSO_>=0.60
64	Identified as possible RR Lyra (Hernitschek+ 2015ApJ...801...45H), P_QSO_>=0.05
128	Identified as a variable based on ChiSq (Hernitschek+ 2015ApJ...801...45H)
256	Identified as a non-periodic (stationary) transient
512	At least one detection identified with a known solar-system object (asteroid or other)
1024	Most detections identified with a known solar-system object (asteroid or other)
2048	Star with large proper motion
4096	Simple weighted average position was used (no IRLS fitting)
8192	Average position was fitted
16384	Proper motion model was fitted
32768	Parallax model was fitted
65536	Average position used (not PM or PAR)
131072	Proper motion used (not AVE or PAR)
262144	Parallax used (not AVE or PM)
524288	Mean astrometry could not be measured
1048576	Stack position used for mean astrometry
2097152	Mean astrometry used for stack position
4194304	Failure to measure proper-motion model
8388608	Extended in our data (eg, PS)
16777216	Extended in external data (eg, 2MASS)
33554432	Good-quality measurement in our data (eg,PS)
67108864	Good-quality measurement in external data (eg,2MASS)
134217728	Good-quality object in the stack (>1 good stack measurement)
268435456	The primary stack measurements are the best measurements
536870912	Suspect object in the stack (no more than 1 good measurement, 2 or more suspect or good stack measurement)
1073741824	Poor-quality stack object (no more than 1 good or suspect measurement)