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- Bitmask Primer
- Bitmasks in CAS
- Bitmasks in SEGUE
- Bitmasks in IDL
- PHOTO FLAGS1
- PHOTO FLAGS2
- RESOLVE_STATUS
- CALIB_STATUS
- IMAGE_STATUS
- LEGACY_TARGET1
- LEGACY_TARGET2
- SEGUE1_TARGET1
- SEGUE1_TARGET2
- SEGUE2_TARGET1
- SEGUE2_TARGET2
- SPECIAL_TARGET1
- BOSS_TARGET1
- ANCILLARY_TARGET1
- ANCILLARY_TARGET2
- BOSSTILE_STATUS
- FLUXMATCH_STATUS
- SPECTRUM PIXMASK
- ZWARNING
- APOGEE_TARGET1
- APOGEE_TARGET2
SEGUE2_TARGET2: SEGUE-2 secondary target bits
| Bit name | Binary digit | Description |
|---|---|---|
| LIGHT_TRAP | 0 | light trap hole |
| SEGUE2_REDDENING | 1 | reddening standard |
| SEGUE2_TEST | 2 | test target |
| SEGUE2_QA* | 3 | repeat target across plates |
| SKY | 4 | empty area for sky-subtraction |
| SEGUE2_SPECPHOTO | 5 | spectrophotometric star |
| GUIDE_STAR | 6 | guide star |
| BUNDLE_HOLE | 7 | bundle hole |
| QUALITY_HOLE | 8 | quality hole |
| HOT_STD | 9 | hot standard |
| SEGUE2_CLUSTER | 10 | SEGUE-2 stellar cluster target |
| SEGUE2_STETSON | 11 | Stetson standard target |
| SEGUE2_CHECKED | 31 | was a checked object |
*QA duplicate observations are not currently marked in segue2_target2 bitmasks. These are only marked in sourcetype in SpecObjAll.